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doc-exports/docs/elb/umn/CLASS.TXT.json
zhoumeng fa6d2517b0 ELB_UMN_0927 
Reviewed-by: Hajba, László Antal <laszlo-antal.hajba@t-systems.com>
Co-authored-by: zhoumeng <zhoumeng35@huawei.com>
Co-committed-by: zhoumeng <zhoumeng35@huawei.com>
2024-10-22 08:54:20 +00:00

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[
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Service Overview",
"uri":"elb_pro_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"1"
},
{
"desc":"Elastic Load Balancing (ELB) automatically distributes incoming traffic across multiple backend servers based on the listening rules you configure. ELB expands the servic",
"product_code":"elb",
"title":"What Is ELB?",
"uri":"en-us_topic_0015479966.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"2"
},
{
"desc":"Robust performanceEach load balancer has exclusive use of isolated resources, meeting your requirements for handling a massive number of requests. A single load balancer ",
"product_code":"elb",
"title":"Product Advantages",
"uri":"elb_pro_0005.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"3"
},
{
"desc":"The following describes how ELB works:A client sends a request to your application.The listeners added to your load balancer use the protocols and ports you have configur",
"product_code":"elb",
"title":"How ELB Works",
"uri":"elb_pro_0003.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"4"
},
{
"desc":"For an application with heavy traffic, such as a large portal or mobile app store, ELB evenly distributes incoming traffic to multiple backend servers, balancing the load",
"product_code":"elb",
"title":"Application Scenarios",
"uri":"elb_pro_0006.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"5"
},
{
"desc":"Each type of load balancer has their advantages.In the eu-de region, you can create both dedicated and shared load balancers, and you can create either type of load balan",
"product_code":"elb",
"title":"Differences Between Dedicated and Shared Load Balancers",
"uri":"elb_pro_0004.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"6"
},
{
"desc":"A load balancer can work on either a public or private network.You can bind an EIP to a load balancer so that it can receive requests from the Internet and route the requ",
"product_code":"elb",
"title":"Load Balancing on a Public or Private Network",
"uri":"elb_pro_01_0004.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"7"
},
{
"desc":"Load balancers communicate with backend servers over a private network.If backend servers process only requests routed from load balancers, there is no need to assign EIP",
"product_code":"elb",
"title":"Network Traffic Paths",
"uri":"elb_ug_fz_0003_01.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"8"
},
{
"desc":"When you create a dedicated load balancer, you can select elastic or fixed specifications based on your service requirements. Table 1 compares the two types of specificat",
"product_code":"elb",
"title":"Specifications of Dedicated Load Balancers",
"uri":"en-us_topic_0287737145.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"9"
},
{
"desc":"You can create dedicated and shared load balancers on ELB console. This section describes the quotas and restrictions that apply to ELB resources.Quotas put limits on the",
"product_code":"elb",
"title":"Quotas and Constraints",
"uri":"elb_pro_0019.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"10"
},
{
"desc":"If you need to assign different permissions to personnel in your enterprise to access your ELB resources, IAM is a good choice for fine-grained permissions management. IA",
"product_code":"elb",
"title":"Permissions",
"uri":"en-us_topic_0171274900.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"11"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Product Concepts",
"uri":"elb_pro_0210.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"12"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Basic Concepts",
"uri":"elb_pro_0001.html",
"doc_type":"usermanual",
"p_code":"12",
"code":"13"
},
{
"desc":"A region and availability zone (AZ) identify the location of a data center. You can create resources in a specific region and AZ.A region is a physical data center, which",
"product_code":"elb",
"title":"Region and AZ",
"uri":"elb_pro_0002.html",
"doc_type":"usermanual",
"p_code":"12",
"code":"14"
},
{
"desc":"Virtual Private Cloud (VPC)Provides IP addresses and bandwidth for load balancers.Provides IP addresses and bandwidth for load balancers.Auto Scaling (AS)Works with ELB t",
"product_code":"elb",
"title":"How ELB Works with Other Services",
"uri":"elb_pro_0008.html",
"doc_type":"usermanual",
"p_code":"1",
"code":"15"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Getting Started",
"uri":"elb_qs_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"16"
},
{
"desc":"To use ELB to distribute traffic across backend servers, you need to create a dedicated load balancer or a shared load balancer.Two examples are given to show how you can",
"product_code":"elb",
"title":"Overview",
"uri":"elb_qs_0001.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"17"
},
{
"desc":"Figure 1 shows how you can use basic functions of ELB to route requests when you are still new to ELB, and Figure 2 shows how you can use domain name or URL-based forward",
"product_code":"elb",
"title":"Process Flowchart",
"uri":"elb_qs_0005.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"18"
},
{
"desc":"You have a web application, which often needs to handle heavy traffic and is deployed on two ECSs for load balancing.You can create a dedicatedload balancer to distribute",
"product_code":"elb",
"title":"Using Dedicated Load Balancers (Entry Level)",
"uri":"elb_qs_0002.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"19"
},
{
"desc":"You have two web applications that are deployed on separated ECSs but use the same domain name for access. You can set different URLs to process requests.To forward reque",
"product_code":"elb",
"title":"Using Dedicated Load Balancers (Advanced Level)",
"uri":"elb_qs_0003.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"20"
},
{
"desc":"You have a web application that is deployed on two ECSs, and the application often needs to handle a heavy load.You can create a shared load balancer to distribute traffi",
"product_code":"elb",
"title":"Using Shared Load Balancers (Entry Level)",
"uri":"en-us_topic_0052569751.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"21"
},
{
"desc":"You have two web applications that are deployed on separated ECSs but use the same domain name for access. You can set different URLs to process requests.To forward reque",
"product_code":"elb",
"title":"Using Shared Load Balancers (Advanced Level)",
"uri":"en-us_elb_02_0001.html",
"doc_type":"usermanual",
"p_code":"16",
"code":"22"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Load Balancer",
"uri":"en-us_elb_03_0001.html",
"doc_type":"usermanual",
"p_code":"",
"code":"23"
},
{
"desc":"Before creating a load balancer, you must plan its region, network, protocol, and backend servers.When you select a region, note the following:The region must be close to",
"product_code":"elb",
"title":"Preparations for Creating a Load Balancer",
"uri":"elb_ug_fz_0004.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"24"
},
{
"desc":"You have prepared everything required for creating a load balancer. For details, see Preparations for Creating a Load Balancer.In the eu-de region, you can create both de",
"product_code":"elb",
"title":"Creating a Dedicated Load Balancer",
"uri":"elb_lb_000006.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"25"
},
{
"desc":"You have prepared everything required for creating a load balancer. For details, see Preparations for Creating a Load Balancer.Load balancers receive requests from client",
"product_code":"elb",
"title":"Creating a Shared Load Balancer",
"uri":"en-us_topic_0015479967.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"26"
},
{
"desc":"You can enable deletion protection for load balancers to prevent them from being deleted by accident.Log in to the management console.In the upper left corner of the page",
"product_code":"elb",
"title":"Configuring Deletion Protection for Load Balancers",
"uri":"elb_ug_fz_0005.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"27"
},
{
"desc":"If you set the Network Type of a load balancer to Public IPv4 network or IPv6 network, the load balancer can route requests over the Internet and you can modify the bandw",
"product_code":"elb",
"title":"Modifying the Bandwidth",
"uri":"elb_ug_fz_0015.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"28"
},
{
"desc":"This section guides you on how to change the specifications of a dedicated load balancer.You can only change the specifications of dedicated load balancers.Downgrading sp",
"product_code":"elb",
"title":"Changing the Specifications of a Dedicated Load Balancer",
"uri":"elb_ug_fz_0016.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"29"
},
{
"desc":"You can change the private IPv4 address and IPv6 address bound to a load balancer.You can change the private IPv4 address into another IPv4 IP address in the current subn",
"product_code":"elb",
"title":"Changing an IP Address",
"uri":"elb_lb_000010.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"30"
},
{
"desc":"You can bind an IP address to a load balancer or unbind the IP address from a load balancer based on service requirements.An IPv4 EIP or a private IPv4 address can be bou",
"product_code":"elb",
"title":"Binding an IP Address to or Unbinding an IP Address from a Load Balancer",
"uri":"elb_ug_fz_0009.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"31"
},
{
"desc":"After you bind an IPv6 address to a dedicated load balancer, you can add the load balancer to a shared bandwidth to enable it to route requests over the Internet. After y",
"product_code":"elb",
"title":"Adding to or Removing from an IPv6 Shared Bandwidth",
"uri":"elb_lb_000011.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"32"
},
{
"desc":"You can export the load balancer list for backup.Log in to the management console.In the upper left corner of the page, click and select the desired region and project.C",
"product_code":"elb",
"title":"Exporting the Load Balancer List",
"uri":"elb_ug_fz_0011.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"33"
},
{
"desc":"You can delete a load balancer if you do not need it any longer.A deleted load balancer cannot be recovered.After a public network load balancer is deleted, its EIP will ",
"product_code":"elb",
"title":"Deleting a Load Balancer",
"uri":"elb_ug_fz_0008.html",
"doc_type":"usermanual",
"p_code":"23",
"code":"34"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Listener",
"uri":"en-us_topic_0015479923.html",
"doc_type":"usermanual",
"p_code":"",
"code":"35"
},
{
"desc":"You need to add at least one listener after you have created a load balancer. This listener receives requests from clients and routes requests to backend servers using th",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_jt_0001.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"36"
},
{
"desc":"Frontend protocols and ports are used by load balancers to receive requests from clients. Load balancers use TCP or UDP at Layer 4, and HTTP or HTTPS at Layer 7. Select a",
"product_code":"elb",
"title":"Protocols and Ports",
"uri":"elb_ug_jt_0002.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"37"
},
{
"desc":"You can add a TCP listener, if high reliability and high accuracy are required but slow speed is acceptable, for example, during file transfer, email sending and receivin",
"product_code":"elb",
"title":"Adding a TCP Listener",
"uri":"elb_ug_jt_0006.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"38"
},
{
"desc":"UDP listeners are suitable for scenarios that focus more on timeliness than reliability, such as video chat, gaming, and real-time quotation in the financial market.UDP l",
"product_code":"elb",
"title":"Adding a UDP Listener",
"uri":"elb_ug_jt_0007.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"39"
},
{
"desc":"HTTP listeners are suitable for applications that require identifying the data content, such as web applications and small mobile games.If the listener protocol is HTTP, ",
"product_code":"elb",
"title":"Adding an HTTP Listener",
"uri":"elb_ug_jt_0008.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"40"
},
{
"desc":"HTTPS listeners are best suited for applications that require encrypted transmission. Load balancers decrypt HTTPS requests before routing them to backend servers, which ",
"product_code":"elb",
"title":"Adding an HTTPS Listener",
"uri":"elb_ug_jt_0009.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"41"
},
{
"desc":"If you use UDP as the frontend protocol, you can select QUIC as the backend protocol and select the connection ID to route requests with the same connection ID to the sam",
"product_code":"elb",
"title":"Adding a UDP Listener (with a QUIC Backend Server Group Associated)",
"uri":"elb_ug_jt_0018.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"42"
},
{
"desc":"You can configure timeout durations (idle timeout, request timeout, and response timeout) for your listeners to meet varied demands. For example, if the size of a request",
"product_code":"elb",
"title":"Configuring Timeout Durations",
"uri":"elb_ug_jt_0014.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"43"
},
{
"desc":"You can modify a listener as needed or delete a listener if you no longer need it.Deleted listeners cannot be recovered.Frontend Protocol/Port and Backend Protocol cannot",
"product_code":"elb",
"title":"Modifying or Deleting a Listener",
"uri":"elb_ug_jt_0012.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"44"
},
{
"desc":"If you enable Transfer Client IP Address, your load balancer will use the IP address of the client to access the backend server.Table 1 lists whether you can enable or di",
"product_code":"elb",
"title":"Transfer Client IP Address (Dedicated Load Balancers)",
"uri":"en-us_topic_0000001794660385.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"45"
},
{
"desc":"Generally, shared load balancers use IP addresses in 100.125.0.0/16 to communicate with backend servers. If you want a load balancer to communicate with backend servers u",
"product_code":"elb",
"title":"Transfer Client IP Address (Shared Load Balancers)",
"uri":"elb_ug_jt_0515.html",
"doc_type":"usermanual",
"p_code":"35",
"code":"46"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Advanced Features of HTTP/HTTPS Listeners",
"uri":"elb_ug_jt_0013.html",
"doc_type":"usermanual",
"p_code":"",
"code":"47"
},
{
"desc":"You can add forwarding policies to HTTP or HTTPS listeners to forward requests to different backend server groups based on domain names or URLs.This is suited for applica",
"product_code":"elb",
"title":"Forwarding Policy (Shared Load Balancers)",
"uri":"en-us_topic_0114694934.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"48"
},
{
"desc":"If advanced forwarding is not enabled, perform the following operations to add forwarding policies to HTTP or HTTPS listeners of dedicated load balancers.You can add forw",
"product_code":"elb",
"title":"Forwarding Policy (Dedicated Load Balancers)",
"uri":"elb_ug_jt_0023.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"49"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Advanced Forwarding (Dedicated Load Balancers)",
"uri":"elb_ug_jt_060300.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"50"
},
{
"desc":"Advanced forwarding policies are available only for dedicated load balancers. If you have enabled Advanced Forwarding, perform the following operations to add advanced fo",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_jt_060301.html",
"doc_type":"usermanual",
"p_code":"50",
"code":"51"
},
{
"desc":"Each HTTP or HTTPS listener has a default forwarding policy. You can also define additional forwarding policies. Each forwarding policy consists of a priority, one or mor",
"product_code":"elb",
"title":"Forwarding Rules and Actions",
"uri":"elb_ug_jt_060302.html",
"doc_type":"usermanual",
"p_code":"50",
"code":"52"
},
{
"desc":"You can add advanced forwarding policies to HTTP or HTTPS listeners of dedicated load balancers to route requests more specifically.Each advanced forwarding policy consis",
"product_code":"elb",
"title":"Configuring Advanced Forwarding",
"uri":"elb_ug_jt_060303.html",
"doc_type":"usermanual",
"p_code":"50",
"code":"53"
},
{
"desc":"In common HTTPS service scenarios, only the server certificate is required for authentication. For some mission-critical services, such as financial transactions, you nee",
"product_code":"elb",
"title":"Mutual Authentication",
"uri":"en_us_elb_03_0006.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"54"
},
{
"desc":"Hypertext Transfer Protocol 2.0 (HTTP/2) is the next-generation HTTP protocol. HTTP/2 is used to secure connections between the load balancer and clients. You can enable ",
"product_code":"elb",
"title":"HTTP/2",
"uri":"en-us_topic_0150301849.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"55"
},
{
"desc":"HTTPS is an extension of HTTP. HTTPS encrypts data between a web server and a browser.If you enable redirection, all HTTP requests to your website are transmitted over HT",
"product_code":"elb",
"title":"HTTP Redirection to HTTPS",
"uri":"en-us_topic_0118840332.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"56"
},
{
"desc":"ELB allows the EIPs of the load balancers to be passed to backend servers. You can enable the function when you add HTTPS or HTTP listeners.Load balancer EIPs are placed ",
"product_code":"elb",
"title":"Transferring the Load Balancer EIP to Backend Servers",
"uri":"en-us_topic_0118147668.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"57"
},
{
"desc":"When you add HTTPS listeners, you can select appropriate security policies to improve security. A security policy is a combination of TLS protocols of different versions ",
"product_code":"elb",
"title":"TLS Security Policy",
"uri":"elb_ug_jt_0022.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"58"
},
{
"desc":"If you have an application that can be accessed through multiple domain names and each domain name uses a different certificate, you can enable Server Name Indication (SN",
"product_code":"elb",
"title":"SNI Certificate (for HTTPS Listeners)",
"uri":"elb_ug_jt_0021.html",
"doc_type":"usermanual",
"p_code":"47",
"code":"59"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Backend Server Group",
"uri":"elb_ug_hdg_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"60"
},
{
"desc":"A backend server group is a logical collection of one or more backend servers to receive massive concurrent requests at the same time. A backend server can be an ECS, BMS",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_hdg_0001.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"61"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Key Functions",
"uri":"elb_ug_hdg_0002.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"62"
},
{
"desc":"ELB periodically sends requests to backend servers to check whether they can process requests. This process is called health check.If a backend server is detected unhealt",
"product_code":"elb",
"title":"Health Check",
"uri":"elb_ug_hc_0001.html",
"doc_type":"usermanual",
"p_code":"62",
"code":"63"
},
{
"desc":"Load balancers receive requests from clients and forward them to backend servers in one or more AZs. Each load balancer has at least a listener and a backend server. The ",
"product_code":"elb",
"title":"Load Balancing Algorithms",
"uri":"elb_ug_jt_0003.html",
"doc_type":"usermanual",
"p_code":"62",
"code":"64"
},
{
"desc":"Sticky sessions ensure that requests from a client always get routed to the same backend server before a session elapses.Here is an example that describes how sticky sess",
"product_code":"elb",
"title":"Sticky Session",
"uri":"elb_ug_jt_0004.html",
"doc_type":"usermanual",
"p_code":"62",
"code":"65"
},
{
"desc":"If you enable slow start, the load balancer linearly increases the proportion of requests to the new backend servers added to the backend server group. When the slow star",
"product_code":"elb",
"title":"Slow Start (Dedicated Load Balancers)",
"uri":"en-us_topic_0000001794819209.html",
"doc_type":"usermanual",
"p_code":"62",
"code":"66"
},
{
"desc":"To route requests, you need to associate a backend server group to each listener.This section describes how you can create a backend server group for a dedicated load bal",
"product_code":"elb",
"title":"Creating a Backend Server Group (Dedicated Load Balancers)",
"uri":"elb_ug_hdg_0003.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"67"
},
{
"desc":"To route requests, you need to associate a backend server group to each listener.This section describes how you can create a backend server group for shared load balancer",
"product_code":"elb",
"title":"Creating a Backend Server Group (Shared Load Balancers)",
"uri":"elb_ug_hdg_0004.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"68"
},
{
"desc":"Dedicated load balancers allow you to enable the removal protection option for a backend server group to prevent the servers in it from being removed by accident.Log in t",
"product_code":"elb",
"title":"Enabling Removal Protection for a Backend Server Group",
"uri":"elb_ug_hd_0004.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"69"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Modifying a Backend Server Group",
"uri":"elb_ug_hdg_0005.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"70"
},
{
"desc":"After a backend server group is created, you can modify its health check settings and basic information.If backend servers have to handle large number of requests, freque",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_hdg_0005_00.html",
"doc_type":"usermanual",
"p_code":"70",
"code":"71"
},
{
"desc":"This section describes how you can modify the health check settings.After the protocol is changed, the load balancer uses the new protocol to check the health of backend ",
"product_code":"elb",
"title":"Modifying Health Check Settings",
"uri":"en-us_topic_0000001747380572.html",
"doc_type":"usermanual",
"p_code":"70",
"code":"72"
},
{
"desc":"This section describes how you can change the load balancing algorithm.For details about load balancing algorithms, see Load Balancing Algorithms.Log in to the management",
"product_code":"elb",
"title":"Changing the Load Balancing Algorithm",
"uri":"elb_ug_hdg_0005_02.html",
"doc_type":"usermanual",
"p_code":"70",
"code":"73"
},
{
"desc":"This section describes how you can modify the sticky session settings.This section applies to dedicated and shared load balancers.You can also configure sticky sessions w",
"product_code":"elb",
"title":"Modifying Sticky Session Settings",
"uri":"elb_ug_hdg_0005_03.html",
"doc_type":"usermanual",
"p_code":"70",
"code":"74"
},
{
"desc":"This section describes how you can modify the slow start settings.For details, see Slow Start (Dedicated Load Balancers).This section applies only to dedicated load balan",
"product_code":"elb",
"title":"Modifying Slow Start Settings (Dedicated Load Balancers)",
"uri":"elb_ug_hdg_0005_04.html",
"doc_type":"usermanual",
"p_code":"70",
"code":"75"
},
{
"desc":"This section describes how you can change the default backend server group configured for a listener.TCP or UDP listeners forward requests to the default backend server g",
"product_code":"elb",
"title":"Changing a Backend Server Group",
"uri":"elb_ug_hdg_0006.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"76"
},
{
"desc":"This section describes how you can view the following information about a backend server group:Basic information: the name, ID, and backend protocolHealth check: whether ",
"product_code":"elb",
"title":"Viewing a Backend Server Group",
"uri":"elb_ug_hdg_0007.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"77"
},
{
"desc":"This section describes how you can delete a backend server group.Before you delete a backend server group, you need to:Disassociate it from the listener. For details, see",
"product_code":"elb",
"title":"Deleting a Backend Server Group",
"uri":"elb_ug_hdg_0008.html",
"doc_type":"usermanual",
"p_code":"60",
"code":"78"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Backend Server (Dedicated Load Balancers)",
"uri":"elb_ug_hd3_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"79"
},
{
"desc":"Backend servers receive and process requests from the associated load balancer.If the incoming traffic increases, you can add more backend servers to ensure the stability",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_hd3_0001.html",
"doc_type":"usermanual",
"p_code":"79",
"code":"80"
},
{
"desc":"To ensure normal communications between the load balancer and backend servers, you need to check the security group rules and firewall rules configured for the backend se",
"product_code":"elb",
"title":"Configuring Security Group and Firewall Rules",
"uri":"elb_ug_hd_0007.html",
"doc_type":"usermanual",
"p_code":"79",
"code":"81"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Managing Backend Servers",
"uri":"elb_ug_hd3_0003.html",
"doc_type":"usermanual",
"p_code":"79",
"code":"82"
},
{
"desc":"When you use ELB to route traffic to backend servers, you need to ensure that at least one backend server is running normally and can receive requests from the associated",
"product_code":"elb",
"title":"Adding Backend Servers",
"uri":"elb_ug_hd3_0003_01.html",
"doc_type":"usermanual",
"p_code":"82",
"code":"83"
},
{
"desc":"You can view backend servers that have been added to a backend server group. For example, you can view their status, private IP addresses, health check results, weights, ",
"product_code":"elb",
"title":"Viewing Backend Servers",
"uri":"elb_ug_hd3_0003_02.html",
"doc_type":"usermanual",
"p_code":"82",
"code":"84"
},
{
"desc":"You can remove a backend server that is no longer needed from a backend server group.If a backend server is removed, it is disassociated from the load balancer and can st",
"product_code":"elb",
"title":"Removing Backend Servers",
"uri":"elb_ug_hd3_0003_03.html",
"doc_type":"usermanual",
"p_code":"82",
"code":"85"
},
{
"desc":"You can change the weights specified for backend servers based on their capability to process requests.The weight ranges from 0 to 100. If you set the weight of a backend",
"product_code":"elb",
"title":"Changing Backend Server Weights",
"uri":"elb_ug_hd3_0003_04.html",
"doc_type":"usermanual",
"p_code":"82",
"code":"86"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"IP Addresses as Backend Servers",
"uri":"elb_ug_hd3_0004.html",
"doc_type":"usermanual",
"p_code":"79",
"code":"87"
},
{
"desc":"Dedicated load balancers support hybrid load balancing. You can add servers and supplementary network interfaces in the VPC where the load balancer is created, in a diffe",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_hd3_0004_01.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"88"
},
{
"desc":"You can enable IP as a backend for an existing dedicated load balancer.IP as a backend cannot be disabled after it is enabled.The protocol of backend server groups can on",
"product_code":"elb",
"title":"Enabling IP as a Backend",
"uri":"elb_ug_hd3_0004_02.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"89"
},
{
"desc":"If you enable IP as a backend, you can associate backend servers with the load balancer by using their IP addresses.You need to get prepared for different scenarios as sh",
"product_code":"elb",
"title":"Adding IP Addresses as Backend Servers",
"uri":"elb_ug_hd3_0004_03.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"90"
},
{
"desc":"You can view backend servers added to a backend server group, including their IP addresses, health check results, weights, and ports.Log in to the management console.In t",
"product_code":"elb",
"title":"Viewing Backend Servers",
"uri":"elb_ug_hd3_0004_04.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"91"
},
{
"desc":"You can remove backend servers from a backend server group when you do not need them to process requests.Log in to the management console.In the upper left corner of the ",
"product_code":"elb",
"title":"Removing Backend Servers",
"uri":"elb_ug_hd3_0004_05.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"92"
},
{
"desc":"You can change the weights specified for backend servers based on their capability to process requests.The weight ranges from 0 to 100. If you set the weight of a backend",
"product_code":"elb",
"title":"Changing Backend Server Weights",
"uri":"elb_ug_hd3_0004_06.html",
"doc_type":"usermanual",
"p_code":"87",
"code":"93"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Backend Server (Shared Load Balancers)",
"uri":"elb_ug_hd2_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"94"
},
{
"desc":"Backend servers receive and process requests from the associated load balancer.If the incoming traffic increases, you can add more backend servers to ensure the stability",
"product_code":"elb",
"title":"Overview",
"uri":"elb_ug_hd2_0001.html",
"doc_type":"usermanual",
"p_code":"94",
"code":"95"
},
{
"desc":"To ensure normal communications between the load balancer and backend servers, you need to check the security group rules and firewall rules configured for the backend se",
"product_code":"elb",
"title":"Configuring Security Group and Firewall Rules",
"uri":"elb_ug_hd_0002.html",
"doc_type":"usermanual",
"p_code":"94",
"code":"96"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Managing Backend Servers",
"uri":"elb_ug_hd2_0003.html",
"doc_type":"usermanual",
"p_code":"94",
"code":"97"
},
{
"desc":"You can add backend servers to a backend server group to process requests from clients.When you use ELB to route requests, ensure that at least one backend server is runn",
"product_code":"elb",
"title":"Adding Backend Servers",
"uri":"elb_ug_hd2_0003_01.html",
"doc_type":"usermanual",
"p_code":"97",
"code":"98"
},
{
"desc":"You can view the added backend servers in a backend server group. For example, you can view their status, private IP addresses, health check results, weights, and ports.L",
"product_code":"elb",
"title":"Viewing Backend Servers",
"uri":"elb_ug_hd2_0003_02.html",
"doc_type":"usermanual",
"p_code":"97",
"code":"99"
},
{
"desc":"You can remove a backend server that is no longer needed from a backend server group.If a backend server is removed, it is disassociated from the load balancer and can st",
"product_code":"elb",
"title":"Removing Backend Servers",
"uri":"elb_ug_hd2_0003_03.html",
"doc_type":"usermanual",
"p_code":"97",
"code":"100"
},
{
"desc":"You can change the weights specified for backend servers based on their capability to process requests.The weight ranges from 0 to 100. If you set the weight of a backend",
"product_code":"elb",
"title":"Changing Backend Server Weights",
"uri":"elb_ug_hd2_0003_04.html",
"doc_type":"usermanual",
"p_code":"97",
"code":"101"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Certificate",
"uri":"elb_ug_zs_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"102"
},
{
"desc":"ELB supports two types of certificates. If you need an HTTPS listener, you need to bind a server certificate to it. To enable mutual authentication, you also need to bind",
"product_code":"elb",
"title":"Introduction to Certificates",
"uri":"elb_ug_zs_0001.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"103"
},
{
"desc":"You can copy and paste the certificate body to create a certificate or directly upload the certificate.A certificate issued by the Root CA is unique, and no additional ce",
"product_code":"elb",
"title":"Certificate and Private Key Format",
"uri":"en-us_topic_0092382555.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"104"
},
{
"desc":"ELB supports certificates only in PEM format. If you have a certificate in any other format, you must convert it to a PEM-encoded certificate. There are some common metho",
"product_code":"elb",
"title":"Converting Certificate Formats",
"uri":"elb_ug_zs_0003.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"105"
},
{
"desc":"To enable authentication for securing data transmission over HTTPS, you can create certificates for load balancers. You can also modify and delete certificates.A certific",
"product_code":"elb",
"title":"Creating, Modifying, or Deleting a Certificate",
"uri":"elb_ug_zs_0004.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"106"
},
{
"desc":"You need to bind a certificate when you add an HTTPS listener to a load balancer. If the certificate used by a listener has expired or needs to be replaced due to other r",
"product_code":"elb",
"title":"Replacing a Certificate",
"uri":"elb_ug_zs_0005.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"107"
},
{
"desc":"You need to quickly view details of the listener to which a certificate is bound.Log in to the management console.In the upper left corner of the page, click and select ",
"product_code":"elb",
"title":"Querying a Listener by Certificate",
"uri":"elb_ug_zs_0006.html",
"doc_type":"usermanual",
"p_code":"102",
"code":"108"
},
{
"desc":"If you have a large number of cloud resources, you can assign different tags to the resources to quickly identify them and use these tags to easily manage your resources.",
"product_code":"elb",
"title":"Tag",
"uri":"elb_ug_bq_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"109"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Access Control",
"uri":"elb_ug_fw_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"110"
},
{
"desc":"Access control allows you to add a whitelist or blacklist to specify IP addresses that are allowed or denied to access a listener. A whitelist allows specified IP address",
"product_code":"elb",
"title":"Access Control",
"uri":"elb_03_0003.html",
"doc_type":"usermanual",
"p_code":"110",
"code":"111"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Managing IP Address Groups",
"uri":"elb_ug_ip_0001.html",
"doc_type":"usermanual",
"p_code":"110",
"code":"112"
},
{
"desc":"An IP address group is a collection of IP addresses that you can use to manage IP addresses with the same security requirements or whose security requirements change freq",
"product_code":"elb",
"title":"Creating an IP Address Group",
"uri":"elb_ug_ip_0000.html",
"doc_type":"usermanual",
"p_code":"112",
"code":"113"
},
{
"desc":"This section describes how you can view information about an IP address group, including:Name, ID, Description and creation time.IP addresses and CIDR blocksAssociated li",
"product_code":"elb",
"title":"Viewing the Details of an IP Address Group",
"uri":"elb_ug_ip_0003.html",
"doc_type":"usermanual",
"p_code":"112",
"code":"114"
},
{
"desc":"After an IP address group is created, you can manage the IP addresses in an IP address group as required:Adding IP AddressesChanging IP AddressesDeleting an IP AddressThe",
"product_code":"elb",
"title":"Managing IP Addresses in an IP Address Group",
"uri":"elb_ug_ip_0002.html",
"doc_type":"usermanual",
"p_code":"112",
"code":"115"
},
{
"desc":"If you no longer need an IP address group, you can delete it. This section describes how you can delete an IP address group.An IP address group that has been used for con",
"product_code":"elb",
"title":"Deleting an IP Address Group",
"uri":"elb_ug_ip_0004.html",
"doc_type":"usermanual",
"p_code":"112",
"code":"116"
},
{
"desc":"ELB logs HTTP and HTTPS requests received by load balancers, including the time when the request was sent, client IP address, request path, and server response.With Log T",
"product_code":"elb",
"title":"Access Logging",
"uri":"en-us_topic_0150301848.html",
"doc_type":"usermanual",
"p_code":"",
"code":"117"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Monitoring",
"uri":"elb_ug_jk_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"118"
},
{
"desc":"This section describes the namespace, the metrics that can be monitored by Cloud Eye, and dimensions of these metrics. You can view the metrics reported by ELB and the ge",
"product_code":"elb",
"title":"Monitoring Metrics",
"uri":"elb_ug_jk_0001.html",
"doc_type":"usermanual",
"p_code":"118",
"code":"119"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Setting an Alarm Rule",
"uri":"elb_ug_jk_0002.html",
"doc_type":"usermanual",
"p_code":"118",
"code":"120"
},
{
"desc":"Log in to the management console.Under Management & Deployment, click Cloud Eye.In the navigation pane on the left, choose Alarm Management > Alarm Rules.On the displayed",
"product_code":"elb",
"title":"Creating an Alarm Rule",
"uri":"elb_ug_jk_0003.html",
"doc_type":"usermanual",
"p_code":"120",
"code":"121"
},
{
"desc":"Log in to the management console.Under Management & Deployment, click Cloud Eye.In the navigation pane on the left, choose Alarm Management > Alarm Rules.On the Alarm Rul",
"product_code":"elb",
"title":"Modifying an Alarm Rule",
"uri":"elb_ug_jk_0004.html",
"doc_type":"usermanual",
"p_code":"120",
"code":"122"
},
{
"desc":"Cloud Eye provided by the public cloud platform monitors the running statuses of load balancers.You can view the metrics of each load balancer on the ELB console or the C",
"product_code":"elb",
"title":"Viewing Metrics",
"uri":"elb_ug_jk_0005.html",
"doc_type":"usermanual",
"p_code":"118",
"code":"123"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Permissions Management",
"uri":"elb_ug_qx_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"124"
},
{
"desc":"Use IAM to implement fine-grained permissions control over your ELB resources. With IAM, you can:Create IAM users for employees based on your enterprise's organizational ",
"product_code":"elb",
"title":"Creating a User and Granting Permissions",
"uri":"en-us_topic_0162009774.html",
"doc_type":"usermanual",
"p_code":"124",
"code":"125"
},
{
"desc":"Custom policies can be created as a supplement to the system policies of ELB. For the actions supported for custom policies, see \"Permissions Policies and Supported Actio",
"product_code":"elb",
"title":"Creating a Custom Policy",
"uri":"en-us_topic_0162009773.html",
"doc_type":"usermanual",
"p_code":"124",
"code":"126"
},
{
"desc":"Quotas can limit the number or amount of resources available to users, such as the maximum number of ECSs or EVS disks that can be created.If the existing resource quota ",
"product_code":"elb",
"title":"Quotas",
"uri":"elb_ug_pe_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"127"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"FAQ",
"uri":"elb_faq_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"128"
},
{
"desc":"How Can I Transfer the IP Address of a Client?How Does ELB Perform UDP Health Checks? What Are the Precautions for UDP Health Checks?What Types of Sticky Sessions Does EL",
"product_code":"elb",
"title":"Popular Questions",
"uri":"elb_faq_0200.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"129"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"ELB Use",
"uri":"elb_faq_0212.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"130"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"ELB Functionality",
"uri":"elb_faq_0211.html",
"doc_type":"usermanual",
"p_code":"130",
"code":"131"
},
{
"desc":"ELB cannot be used alone.ELB distributes incoming traffic to multiple backend servers based on the forwarding policy to balance workloads. So, it can expand external serv",
"product_code":"elb",
"title":"Can ELB Be Used Separately?",
"uri":"elb_faq_0060.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"132"
},
{
"desc":"Yes.The connections between the client and load balancer are persistent connections. After a TCP persistent connection is established, the client continuously sends HTTP ",
"product_code":"elb",
"title":"Does ELB Support Persistent Connections?",
"uri":"elb_faq_0079.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"133"
},
{
"desc":"ELB does not support File Transfer Protocol (FTP), but supports Secure File Transfer Protocol (SFTP) on backend servers.",
"product_code":"elb",
"title":"Does ELB Support FTP on Backend Servers?",
"uri":"elb_faq_0057.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"134"
},
{
"desc":"During the lifecycle of a load balancer, whether the assigned EIP is exclusive depends on the type of the load balancer.Dedicated load balancer: The EIP can be unbound fr",
"product_code":"elb",
"title":"Is an EIP Assigned Exclusively to a Load Balancer?",
"uri":"en-us_elb_05_0011.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"135"
},
{
"desc":"By default, each account can have up to 50 load balancers and 100 listeners. If you need more load balancers or listeners, apply to increase your quotas.All load balancer",
"product_code":"elb",
"title":"How Many Load Balancers and Listeners Can I Have?",
"uri":"elb_faq_05_0004.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"136"
},
{
"desc":"ELB supports the following policies:For details about fine-grained permissions, see the Elastic Load Balance API Reference.",
"product_code":"elb",
"title":"What Types of APIs Does ELB Provide? What Are Permissions of ELB?",
"uri":"elb_faq_0088.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"137"
},
{
"desc":"You can adjust the number of backend servers associated with a load balancer at any time. You can also change the type of backend servers according to your service needs.",
"product_code":"elb",
"title":"Can I Adjust the Number of Backend Servers When a Load Balancer is Running?",
"uri":"elb_faq_0062.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"138"
},
{
"desc":"Yes.ELB does not restrict OSs of backend servers as long as applications on these servers are the same and the data is consistent. However, it is recommended that you ins",
"product_code":"elb",
"title":"Can Backend Servers Run Different OSs?",
"uri":"elb_faq_0064.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"139"
},
{
"desc":"Yes. You can configure different backend ports for backend servers associated with a load balancer.",
"product_code":"elb",
"title":"Can I Configure Different Backend Ports for a Load Balancer?",
"uri":"elb_faq_0059.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"140"
},
{
"desc":"Shared load balancers cannot be used across accounts and cannot route traffic to backend servers in VPCs that are different from the VPCs of the load balancers.For dedica",
"product_code":"elb",
"title":"Can ELB Be Used Across Accounts or VPCs?",
"uri":"elb_faq_0135.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"141"
},
{
"desc":"No. Backend servers cannot access the ports of the load balancer they are associated with.",
"product_code":"elb",
"title":"Can Backend Servers Access the Ports of a Load Balancer?",
"uri":"elb_faq_21020218.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"142"
},
{
"desc":"Dedicated load balancers support this function.You can select HTTPS as the listener's and the backend server group's protocol. For details about how to add a listener, se",
"product_code":"elb",
"title":"Can Both the Listener and Backend Server Group Use HTTPS?",
"uri":"elb_faq_21020220.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"143"
},
{
"desc":"You cannot change the VPC and subnet for your Shared load balancers.You can change the subnet but not the VPC for your dedicated load balancers.",
"product_code":"elb",
"title":"Can I Change the VPC and Subnet for My Load Balancer?",
"uri":"elb_faq_210202201.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"144"
},
{
"desc":"No. Shared load balancers cannot be upgraded to dedicated load balancers.",
"product_code":"elb",
"title":"Can I Upgrade a Shared Load Balancer to a Dedicated Load Balancer Without Interrupting Traffic Routing?",
"uri":"elb_faq_21020221.html",
"doc_type":"usermanual",
"p_code":"131",
"code":"145"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Load Balancing Performance",
"uri":"elb_faq_0127.html",
"doc_type":"usermanual",
"p_code":"130",
"code":"146"
},
{
"desc":"Check for failed requests on the clients, especially when 4xx status codes are returned. One possible cause is that the requests are not being routed to backend servers b",
"product_code":"elb",
"title":"How Do I Check for Traffic Inconsistencies?",
"uri":"elb_faq_0049.html",
"doc_type":"usermanual",
"p_code":"146",
"code":"147"
},
{
"desc":"Check whether sticky sessions are enabled. If sticky sessions are enabled and there are few clients, traffic may be unevenly distributed.Check the health of backend serve",
"product_code":"elb",
"title":"How Do I Check If Traffic Is Being Evenly Distributed?",
"uri":"elb_faq_0050.html",
"doc_type":"usermanual",
"p_code":"146",
"code":"148"
},
{
"desc":"Bind an EIP to a backend server to make the applications accessible from the Internet and then check the access delay. In this way, you can determine whether the problem ",
"product_code":"elb",
"title":"How Do I Check If There Is Excessive Access Delay?",
"uri":"elb_faq_0047.html",
"doc_type":"usermanual",
"p_code":"146",
"code":"149"
},
{
"desc":"Check the load of backend servers. If their vCPU usage reaches 100%, applications may have performance bottlenecks.Check the incoming traffic. If burst traffic exceeds th",
"product_code":"elb",
"title":"What Do I Do If a Load Balancer Fails a Stress Test?",
"uri":"elb_faq_0052.html",
"doc_type":"usermanual",
"p_code":"146",
"code":"150"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Load Balancers",
"uri":"elb_faq_0201.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"151"
},
{
"desc":"Quotas can limit the number or amount of resources available to users, such as the maximum number of ECSs or EVS disks that can be created.If the existing resource quota ",
"product_code":"elb",
"title":"What Is Quota?",
"uri":"elb_faq_0065.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"152"
},
{
"desc":"ELB uses FullNAT to forward the incoming traffic. For load balancing at Layer 4, LVS forwards the incoming traffic to backend servers directly. For load balancing at Laye",
"product_code":"elb",
"title":"How Does ELB Distribute Traffic?",
"uri":"elb_faq_0038.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"153"
},
{
"desc":"VPC Peering can help you achieve this. For example, if another user has created load balancer ELB01 in VPC01, and you are in VPC02 and want to access ELB01, you just need",
"product_code":"elb",
"title":"How Can I Access a Load Balancer Across VPCs?",
"uri":"elb_faq_0080.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"154"
},
{
"desc":"There may be resources associated with the load balancer. Delete these resources first.Delete the resources configured for the load balancer in the following sequence:Del",
"product_code":"elb",
"title":"Why Can't I Delete My Load Balancer?",
"uri":"elb_faq_210304.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"155"
},
{
"desc":"If you use a load balancer on a private network, you do not need to configure EIP bandwidth. You only need to bind an EIP and configure bandwidth if you are using a load ",
"product_code":"elb",
"title":"Do I Need to Configure EIP Bandwidth for My Load Balancers?",
"uri":"elb_faq_210305.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"156"
},
{
"desc":"No.If you want to use the load balancer on a public network, you can only bind one EIP to the load balancer to receive requests from the Internet.If you want to use the l",
"product_code":"elb",
"title":"Can I Bind Multiple EIPs to a Load Balancer?",
"uri":"elb_faq_210306.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"157"
},
{
"desc":"These IP addresses are used by underlying resources.Generally, 2 IP addresses are required for creating a load balancer in a single AZ, and 6 IP addresses are required fo",
"product_code":"elb",
"title":"Why Multiple IP Addresses Are Required When I Create or Enable a Dedicated Load Balancer?",
"uri":"elb_faq_210307.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"158"
},
{
"desc":"One possible cause is that the backend server receiving requests from the client has become unhealthy. The source IP hash algorithm uses the source IP address of each req",
"product_code":"elb",
"title":"Why Are Requests from the Same IP Address Routed to Different Backend Servers When the Load Balancing Algorithm Is Source IP Hash?",
"uri":"elb_faq_210308.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"159"
},
{
"desc":"No.The load balancer uses the EIP to receive requests from the Internet and routes the requests to backend servers over a private network.If you want the backend servers ",
"product_code":"elb",
"title":"Can Backend Servers Access the Internet Using the EIP of the Load Balancer?",
"uri":"elb_faq_210309.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"160"
},
{
"desc":"No.Shared load balancers share underlying resources, and the performance of one load balancer is affected by other load balancers. Only dedicated load balancers have excl",
"product_code":"elb",
"title":"Do Shared Load Balancers Have Specifications?",
"uri":"elb_faq_210310.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"161"
},
{
"desc":"No. If the load balancing algorithm is changed, established connections will not be affected. Therefore, traffic routing will not be interrupted.",
"product_code":"elb",
"title":"Will Traffic Routing Be Interrupted If the Load Balancing Algorithm Is Changed?",
"uri":"elb_faq_210312.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"162"
},
{
"desc":"The bandwidth included in the specifications of dedicated load balancers is the upper limit of the inbound or the outbound traffic. The bandwidth of the EIP bound to the ",
"product_code":"elb",
"title":"What Is the Difference Between the Bandwidth Included in Each Specification of a Dedicated Load Balancer and the Bandwidth of an EIP?",
"uri":"elb_faq_210313.html",
"doc_type":"usermanual",
"p_code":"151",
"code":"163"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Listeners",
"uri":"elb_faq_0202.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"164"
},
{
"desc":"ELB supports three types of sticky sessions that can send requests from the same client to the same backend server. The following tables list the types of sticky sessions",
"product_code":"elb",
"title":"What Are the Relationships Between Load Balancing Algorithms and Sticky Session Types?",
"uri":"elb_faq_05_0008.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"165"
},
{
"desc":"You can configure multiple certificates for an HTTPS listener by enabling SNI so that different certificates can be used for authentication based on the domain names of t",
"product_code":"elb",
"title":"Can I Bind Multiple Certificates to a Listener?",
"uri":"elb_faq_05_0005.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"166"
},
{
"desc":"If a TCP or UDP listener is deleted, the load balancer immediately stops routing traffic because the client uses short connections to communicate with the load balancer.I",
"product_code":"elb",
"title":"Will ELB Stop Distributing Traffic Immediately After a Listener Is Deleted?",
"uri":"elb_faq_0083.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"167"
},
{
"desc":"ELB has no restrictions on the file upload speed on the clients. However, the bandwidth may limit the upload speed.For HTTP or HTTPS listeners, the maximum file size is 1",
"product_code":"elb",
"title":"Does ELB Have Restrictions on the File Upload Speed and Size?",
"uri":"elb_faq_0084.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"168"
},
{
"desc":"Yes. This is supported as long as the load balancers are in the same subnet as the backend server.",
"product_code":"elb",
"title":"Can Multiple Load Balancers Route Requests to One Backend Server?",
"uri":"elb_faq_0075.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"169"
},
{
"desc":"For HTTP listeners, unencrypted WebSocket (ws://) is supported by default. For HTTPS listeners, encrypted WebSocket (wss://) is supported by default.",
"product_code":"elb",
"title":"How Is WebSocket Used?",
"uri":"elb_faq_0111.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"170"
},
{
"desc":"The backend server group's protocol (backend protocol) you want to select is not supported by the listener protocol (frontend protocol). There are some constraints on the",
"product_code":"elb",
"title":"Why Can't I Select the Target Backend Server Group When Adding or Modifying a Listener?",
"uri":"elb_faq_210409.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"171"
},
{
"desc":"If you select either network load balancing (TCP/UDP) or application load balancing (HTTP/HTTPS) when creating the load balancer, you can only add listeners of the matche",
"product_code":"elb",
"title":"Why Cannot I Add a Listener to a Dedicated Load Balancer?",
"uri":"elb_faq_210410.html",
"doc_type":"usermanual",
"p_code":"164",
"code":"172"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Backend Servers",
"uri":"elb_faq_0203.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"173"
},
{
"desc":"Each LVS node and Nginx node in the ELB system send detection packets to backend servers at the health check interval that you have specified for the backend server group",
"product_code":"elb",
"title":"Why Is the Interval at Which Backend Servers Receive Health Check Packets Different from What I Have Configured?",
"uri":"elb_faq_0112.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"174"
},
{
"desc":"Yes. Backend servers can access the Internet whether they are associated with a load balancer.",
"product_code":"elb",
"title":"Can Backend Servers Access the Internet After They Are Associated with a Load Balancer?",
"uri":"elb_faq_099.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"175"
},
{
"desc":"Shared load balancers cannot route requests to backend servers across regions.Dedicated load balancers can distribute traffic across VPCs. For details, see Overview.",
"product_code":"elb",
"title":"Can ELB Route Traffic Across Regions?",
"uri":"elb_faq_0074.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"176"
},
{
"desc":"No. There is no need to bind an EIP to each backend server because the load balancer routes requests through the private network.",
"product_code":"elb",
"title":"Does Each Backend Server Need an EIP to Receive Requests from a Public Network Load Balancer?",
"uri":"elb_faq_0077.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"177"
},
{
"desc":"Verify that an IP address has been assigned to the server's primary NIC.Log in to the server. (An ECS is used as an example here.)Use ifconfig or ip address to view the I",
"product_code":"elb",
"title":"How Do I Check the Network Conditions of a Backend Server?",
"uri":"elb_faq_0039.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"178"
},
{
"desc":"Check whether the security group of the server is correctly configured.On the server details page, view the security group.Check whether the security group rules allow ac",
"product_code":"elb",
"title":"How Can I Check the Network Configuration of a Backend Server?",
"uri":"elb_faq_0040.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"179"
},
{
"desc":"Verify that the applications on the backend server are enabled.Log in to the backend server. (An ECS is used as an example here.)Check the port status.netstat -ntplFor Wi",
"product_code":"elb",
"title":"How Do I Check the Status of a Backend Server?",
"uri":"elb_faq_0041.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"180"
},
{
"desc":"When a backend server is associated with a load balancer for the first time, the backend server is considered healthy after one health check. After this, the server is co",
"product_code":"elb",
"title":"When Is a Backend Server Considered Healthy?",
"uri":"elb_faq_0001.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"181"
},
{
"desc":"The whitelist controls only access to a listener. Only IP addresses in the whitelist can access the listener. To control access to backend servers, you can configure fire",
"product_code":"elb",
"title":"Why Can I Access Backend Servers After a Whitelist Is Configured?",
"uri":"elb_faq_0124.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"182"
},
{
"desc":"The new weights for backend servers take effect immediately after the weights are configured. Connections that have been established with backend servers will not be affe",
"product_code":"elb",
"title":"When Will Modified Weights Take Effect?",
"uri":"elb_faq_0125.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"183"
},
{
"desc":"These IP addresses are used by the ELB system. Generally, two IP addresses are required for creating a dedicated load balancer in a single AZ, and six IP addresses are re",
"product_code":"elb",
"title":"Why Must the Subnet Where the Load Balancer Resides Have at Least 16 Available IP Addresses for Enabling IP as a Backend?",
"uri":"elb_faq_0131.html",
"doc_type":"usermanual",
"p_code":"173",
"code":"184"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Health Checks",
"uri":"elb_faq_0204.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"185"
},
{
"desc":"If a client cannot access a backend server through a load balancer, the backend server is declared unhealthy. You can view the health check results for a backend server o",
"product_code":"elb",
"title":"How Do I Troubleshoot an Unhealthy Backend Server?",
"uri":"en-us_topic_0018127975.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"186"
},
{
"desc":"Each LVS node and Nginx node in the ELB system detect backend servers at the health check interval that you have specified for the backend server group.During this period",
"product_code":"elb",
"title":"Why Is the Interval at Which Backend Servers Receive Health Check Packets Different from the Configured Interval?",
"uri":"elb_faq_0092.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"187"
},
{
"desc":"UDP is a connectionless protocol. A UDP health check is implemented as follows:The health check node sends an ICMP request to the backend server based on the health check",
"product_code":"elb",
"title":"How Does ELB Perform UDP Health Checks? What Are the Precautions for UDP Health Checks?",
"uri":"elb_faq_0024.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"188"
},
{
"desc":"ELB is deployed in clusters, and all nodes for request forwarding in the cluster send requests to backend servers at the same time. If the health check interval is too sh",
"product_code":"elb",
"title":"Why Does ELB Frequently Send Requests to Backend Servers During Health Checks?",
"uri":"elb_faq_0114.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"189"
},
{
"desc":"After a backend server is added to a backend server group, the health check is performed at a random time during the first interval and then at the specified interval.",
"product_code":"elb",
"title":"When Does a Health Check Start?",
"uri":"elb_faq_0002.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"190"
},
{
"desc":"Yes. Maximum retries are the maximum number of health checks after which a backend server is detected healthy or the maximum number of health checks after which the same ",
"product_code":"elb",
"title":"Do Maximum Retries Include Health Checks That Consider Backend Servers Unhealthy?",
"uri":"elb_faq_0003.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"191"
},
{
"desc":"You can increase the health check interval by referring to Modifying Health Check Settings.Risk: After the health check interval is prolonged, the time for the load balan",
"product_code":"elb",
"title":"What Do I Do If a Lot of Access Logs Are Generated During Health Checks?",
"uri":"elb_faq_0070.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"192"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"What Status Codes Will Be Returned If Backend Servers Are Identified as Healthy?",
"uri":"elb_faq_210608.html",
"doc_type":"usermanual",
"p_code":"185",
"code":"193"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Obtaining Source IP Addresses",
"uri":"elb_faq_0170.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"194"
},
{
"desc":"When you use ELB to route requests to backend servers, IP addresses of the clients will be translated by the ELB. This FAQ guides you to obtain the IP addresses of the cl",
"product_code":"elb",
"title":"How Can I Transfer the IP Address of a Client?",
"uri":"elb_faq_0090.html",
"doc_type":"usermanual",
"p_code":"194",
"code":"195"
},
{
"desc":"When you add an HTTPS or HTTP listener, enable Transfer Load Balancer EIP to store the EIP bound to the load balancer in the HTTP header and transmit it to backend server",
"product_code":"elb",
"title":"How Can an EIP Bound to a Load Balancer Be Transmitted to Backend Servers?",
"uri":"elb_faq_0171.html",
"doc_type":"usermanual",
"p_code":"194",
"code":"196"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"HTTP/HTTPS Listeners",
"uri":"elb_faq_0180.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"197"
},
{
"desc":"To use HTTPS at both the frontend and backend, you can create a dedicated load balancer, add an HTTPS listener to the load balancer, and set the backend protocol to HTTPS",
"product_code":"elb",
"title":"Which Protocol Should I Select for the Backend Server Group When Adding an HTTPS Listener?",
"uri":"elb_faq_0110.html",
"doc_type":"usermanual",
"p_code":"197",
"code":"198"
},
{
"desc":"The following may cause the Not Secure warning even after a certificate is configured:The domain name used by the certificate is different from the domain name accessed b",
"product_code":"elb",
"title":"Why Is There a Security Warning After a Certificate Is Configured?",
"uri":"elb_faq_0118.html",
"doc_type":"usermanual",
"p_code":"197",
"code":"199"
},
{
"desc":"A possible cause is that you added a forwarding policy that is the same as an existing one. Even if you delete the existing forwarding policy, the newly-added forwarding ",
"product_code":"elb",
"title":"Why Is a Forwarding Policy in the Faulty State?",
"uri":"elb_faq_210804.html",
"doc_type":"usermanual",
"p_code":"197",
"code":"200"
},
{
"desc":"Check the listener protocol.Forwarding policies can only be added to HTTP and HTTPS listeners.",
"product_code":"elb",
"title":"Why Can't I Add a Forwarding Policy to a Listener?",
"uri":"elb_faq_210805.html",
"doc_type":"usermanual",
"p_code":"197",
"code":"201"
},
{
"desc":"This is because the backend server group has been used by another forwarding policy. A backend server group can be used by only one forwarding policy.",
"product_code":"elb",
"title":"Why Cannot I Select an Existing Backend Server Group When Adding a Forwarding Policy?",
"uri":"elb_faq_210806.html",
"doc_type":"usermanual",
"p_code":"197",
"code":"202"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Sticky Sessions",
"uri":"elb_faq_0190.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"203"
},
{
"desc":"Persistent connections are not necessarily related to sticky sessions.A persistent connection allows multiple data packets to be sent continuously over a TCP connection. ",
"product_code":"elb",
"title":"What Are the Differences Between Persistent Connections and Sticky Sessions?",
"uri":"elb_faq_0126.html",
"doc_type":"usermanual",
"p_code":"203",
"code":"204"
},
{
"desc":"Check whether sticky sessions are enabled for the backend server group. If sticky sessions are enabled, go to the next step.Check the health check result of the backend s",
"product_code":"elb",
"title":"How Do I Check If Sticky Sessions Failed to Take Effect?",
"uri":"elb_faq_0046.html",
"doc_type":"usermanual",
"p_code":"203",
"code":"205"
},
{
"desc":"Prepare required resources.Create three ECSs, one as the client and the other two as backend servers.Create a load balancer and add an HTTP listener to the load balancer.",
"product_code":"elb",
"title":"How Do I Test Sticky Sessions Using Linux Curl Commands?",
"uri":"elb_faq_0067.html",
"doc_type":"usermanual",
"p_code":"203",
"code":"206"
},
{
"desc":"Dedicated load balancers: Source IP address and Load balancer cookieShared load balancers: Source IP address, Load balancer cookie, and Application cookie",
"product_code":"elb",
"title":"What Types of Sticky Sessions Does ELB Support?",
"uri":"elb_faq_0085.html",
"doc_type":"usermanual",
"p_code":"203",
"code":"207"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Certificates",
"uri":"elb_faq_0205.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"208"
},
{
"desc":"Refer to Mutual Authentication to create server certificates and CA certificates. Generally, only backend servers need to be authenticated. You only need to configure ser",
"product_code":"elb",
"title":"How Can I Create Server Certificates and CA Certificates?",
"uri":"elb_faq_0072.html",
"doc_type":"usermanual",
"p_code":"208",
"code":"209"
},
{
"desc":"Yes. If the domain name of a wildcard certificate is *.test.com, domain names a.test.com, b.test.com, a.b.test.com, and c.d.test.com are supported.",
"product_code":"elb",
"title":"Does ELB Support Wildcard Certificates?",
"uri":"elb_faq_0073.html",
"doc_type":"usermanual",
"p_code":"208",
"code":"210"
},
{
"desc":"The following are possible causes:You have created a certificate on the ELB console, but you do not have an HTTPS listener.To solve this problem, perform the following st",
"product_code":"elb",
"title":"Why Is Access to Backend Servers Still Abnormal Even If I Have Created a Certificate?",
"uri":"elb_faq_211003.html",
"doc_type":"usermanual",
"p_code":"208",
"code":"211"
},
{
"desc":"No.The new certificate takes effect immediately after the replacement. The old certificate is used for established connections, and the new one is used for new connection",
"product_code":"elb",
"title":"Will the Network or Load Balancing Be Interrupted When a Certificate Is Being Replaced?",
"uri":"elb_faq_211004.html",
"doc_type":"usermanual",
"p_code":"208",
"code":"212"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Monitoring",
"uri":"elb_faq_0207.html",
"doc_type":"usermanual",
"p_code":"128",
"code":"213"
},
{
"desc":"In the following scenarios, outgoing rate monitored by ELB is inconsistent with EIP bandwidth usage statistics on Cloud Eye:If the traffic does not exceed the bandwidth s",
"product_code":"elb",
"title":"Why Is the Outgoing Rate on the ELB Console Inconsistent with the Bandwidth Usage Statistics on the Cloud Eye Console?",
"uri":"elb_faq_0115.html",
"doc_type":"usermanual",
"p_code":"213",
"code":"214"
},
{
"desc":"HTTP or HTTPS listeners terminate TCP connections. In other words, there are two TCP connections between the client and a backend server, one between the client and load ",
"product_code":"elb",
"title":"What Are the Differences Between Layer-7 Status Codes and Backend Status Codes in ELB Metrics?",
"uri":"elb_faq_0081.html",
"doc_type":"usermanual",
"p_code":"213",
"code":"215"
},
{
"desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.",
"product_code":"elb",
"title":"Change History",
"uri":"elb_ug_jl_0000.html",
"doc_type":"usermanual",
"p_code":"",
"code":"216"
}
]
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