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Yang, Tong 5914b67d13 MRS UMN Doc 20240802 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Yang, Tong <yangtong2@huawei.com>
Co-committed-by: Yang, Tong <yangtong2@huawei.com>
2024-09-28 19:04:58 +00:00

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Internal an Internal System User

Scenario

If the service is abnormal, the internal user of the system may be locked. Unlock the user promptly, or the cluster cannot run properly. For the list of system internal users, see User Account List in . The internal user of the system cannot be unlocked using MRS Manager.

Prerequisites

Obtain the default password of the LDAP administrator cn=root,dc=hadoop,dc=com by referring to User Account List in .

Procedure

  1. Use the following method to confirm whether the internal system username is locked:

    1. OLdap port number obtaining method:
      1. Log in to MRS Manager, choose System > OMS > oldap > Modify Configuration.
      2. The LDAP Listening Port parameter value is oldap port.
    2. Domain name obtaining method:
      1. Log in to MRS Manager, choose System > Permission > Domain and Mutual Trust.
      2. The Local Domain parameter value is the domain name.

        For example, the domain name of the current system is 9427068F-6EFA-4833-B43E-60CB641E5B6C.COM.

    3. Run the following command on each node in the cluster as user omm to query the number of password authentication failures:

      ldapsearch -H ldaps://OMS Floating IP Address:OLdap port -LLL -x -D cn=root,dc=hadoop,dc=com -b krbPrincipalName=Internal system username@Domain name,cn=Domain name,cn=krbcontainer,dc=hadoop,dc=com -w Password of LDAP administrator -e ppolicy | grep krbLoginFailedCount

      For example, run the following command to check the number of password authentication failures for user oms/manager:

      ldapsearch -H ldaps://10.5.146.118:21750 -LLL -x -D cn=root,dc=hadoop,dc=com -b krbPrincipalName=oms/manager@9427068F-6EFA-4833-B43E-60CB641E5B6C.COM,cn=9427068F-6EFA-4833-B43E-60CB641E5B6C.COM,cn=krbcontainer,dc=hadoop,dc=com -w Password of user cn=root,dc=hadoop,dc=com -e ppolicy | grep krbLoginFailedCount

      krbLoginFailedCount: 5
    4. Log in to MRS Manager, choose System > Permission > Security Policy > Password Policy.
    5. Check the value of the Password Retries parameter. If the value is less than or equal to the value of krbLoginFailedCount, the user is locked.

      You can also check whether internal users are locked by viewing operations logs.

  2. Log in to the active management node as user omm and run the following command to unlock the user:

    sh ${BIGDATA_HOME}/om-server/om/share/om/acs/config/unlockuser.sh --userName Internal system username

    Example: sh ${BIGDATA_HOME}/om-server/om/share/om/acs/config/unlockuser.sh --userName oms/manager