Add-on Overview

CCE Node Problem Detector (node-problem-detector, NPD) is an add-on that monitors abnormal events of cluster nodes and connects to a third-party monitoring platform. It is a daemon running on each node. It collects node issues from different daemons and reports them to the API server. It can run as a DaemonSet or a daemon.

Add-on Parameters

**Table 1** Parameters
Parameter	Mandatory	Type	Description
basic	No	object	Basic configuration parameters, which do not need to be specified
flavor	Yes	Table 2 object	Flavor parameters
custom	Yes	Table 3 object	Custom parameters

**Table 2** Configuration of flavor
Parameter	Mandatory	Type	Description
description	No	String	Add-on description
name	Yes	String	Add-on specification name. The value is fixed at Single-instance.
replicas	Yes	String	Number of pods. The default value is 1.
resources	Yes	resources object	Container resource (CPU and memory) quotas

**Table 3** Configuration of custom
Parameter	Mandatory	Type	Description
feature_gate	No	String	Feature gate, which is used to enable the beta features
multiAZBalance	No	Bool	Multi AZ deployment
multiAZEnabled	No	Bool	Whether to deploy the add-on pods in multiple AZs. The default value is false. If this parameter is set to true, cross-AZ deployment is forcibly performed. If this parameter is set to false, cross-AZ deployment is preferred.
npc	Yes	object Table 5	node-problem-controller configuration
tolerations	No	List<Object> Table 7	Tolerations of the add-on
node_match_expressions	No	List<Object> Table 7	Node affinity configuration of the add-on

**Table 4** Data structure of the resources field
Parameter	Mandatory	Type	Description
limitsCpu	Yes	String	CPU size limit (unit: m)
limitsMem	Yes	String	Memory size limit (unit: Mi)
name	Yes	String	Add-on name. The value is fixed at custom-resources.
requestsCpu	Yes	String	Requested CPU size (unit: m)
requestsMem	Yes	String	Requested memory size (unit: Mi)

**Table 5** Data structure of the npc field
Parameter	Mandatory	Type	Description
maxTaintedNode	Yes	String or Int	The maximum number of nodes that NPC can add taints to when a single fault occurs on multiple nodes for minimizing impact. The value can be in int or percentage format.

**Table 6** Taints and tolerations
Parameter	Mandatory	Type	Description
key	No	String	Taint key
effect	No	String	Taint policy
operator	No	String	Operator
tolerationSeconds	No	Int	Toleration time window

**Table 7** nodeMatchExpresssion node affinity
Parameter	Mandatory	Type	Description
key	No	String	Taint key
values	No	List<String>	Node affinity name
operator	No	String	Operator

Example Request

{
  "kind": "Addon",
  "apiVersion": "v3",
  "metadata": {
    "annotations": {
      "addon.install/type": "install"
    }
  },
  "spec": {
    "clusterID": "b78fb690-b82c-11ee-83cf-0255ac100b0f",
    "version": "1.18.48",
    "addonTemplateName": "npd",
    "values": {
      "basic": {
        "image_version": "1.18.48",
        "swr_addr": "***",
        "swr_user": "***",
        "rbac_enabled": true,
        "cluster_version": "v1.23"
      },
      "flavor": {
        "description": "custom resources",
        "name": "custom-resources",
        "replicas": 2,
        "resources": [
          {
            "limitsCpu": "100m",
            "limitsMem": "300Mi",
            "name": "node-problem-controller",
            "requestsCpu": "30m",
            "requestsMem": "100Mi"
          },
          {
            "limitsCpu": "100m",
            "limitsMem": "300Mi",
            "name": "node-problem-detector",
            "requestsCpu": "30m",
            "requestsMem": "100Mi"
          }
        ],
        "category": [
          "CCE",
          "Turbo"
        ]
      },
      "custom": {
        "annotations": {},
        "common": {},
        "feature_gates": "",
        "multiAZBalance": false,
        "multiAZEnabled": false,
        "node_match_expressions": [],
        "npc": {
          "maxTaintedNode": "10%"
        },
        "tolerations": [
          {
            "key": "node.kubernetes.io/not-ready",
            "operator": "Exists",
            "effect": "NoExecute",
            "tolerationSeconds": 60
          },
          {
            "key": "node.kubernetes.io/unreachable",
            "operator": "Exists",
            "effect": "NoExecute",
            "tolerationSeconds": 60
          }
        ]
      }
    }
  }
}