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HUAWEI CLOUD Stack 6.5.0 Alarm and Event Reference 04

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
ALM-73005 Residual LUN on the Remote Disk Array

ALM-73005 Residual LUN on the Remote Disk Array

Description

Remote storage is mapped to the LUNs of hosts. This alarm is generated when OpenStack detects that some LUNs are not used by hosts.

Attribute

Alarm ID

Alarm Severity

Auto Clear

73005

Warning

No

Parameters

Name

Meaning

Fault Location Info

host_id: specifies the ID of the host for which the alarm is generated.

Additional Info

  • disk_array_ip: specifies the IP address of the remote storage disk array.
  • storage_pool: specifies the name of the remote storage pool.
  • lun_wwn_list: specifies the WWN list of the residual LUN.

Impact on the System

If there are residual remote LUNs, the system will not be affected, but the remote storage space will be occupied.

Possible Causes

After the host is connected to the remote storage device, the host is reinstalled in PXE mode due to a fault, and the LUN corresponding to the remote storage device is not cleared.

Procedure

  1. Use PuTTY to log in to the first FusionSphere OpenStack node through the IP address of the External OM plane.

    The default user name is fsp. The default password is Huawei@CLOUD8.

    The system supports both password and public-private key pair for identity authentication. If the public-private key pair is used for login authentication, see detailed operations in Using PuTTY to Log In to a Node in Key Pair Authentication Mode.

    NOTE:
    To obtain the IP address of the External OM plane, search for the required parameter on the Tool-generated IP Parameters sheet of the xxx_export_all.xlsm file exported from HUAWEI CLOUD Stack Deploy during software installation. The parameter names in different scenarios are as follows:
    • Region Type I scenario:

      Cascading system: Cascading-ExternalOM-Reverse-Proxy

      Cascaded system: Cascaded-ExternalOM-Reverse-Proxy

    • Region Type II and Region Type III scenarios: ExternalOM-Reverse-Proxy

  2. Run the following command and enter the password of user root to switch to user root:

    su - root

    The default password of user root is Huawei@CLOUD8!.

  3. Run the following command to disable user logout upon system timeout:

    TMOUT=0

  1. Run the following command to import environment variables:

    source set_env

    Information similar to the following is displayed:

      please choose environment variable which you want to import: 
      (1) openstack environment variable (keystone v3) 
      (2) cps environment variable 
      (3) openstack environment variable legacy (keystone v2) 
      (4) openstack environment variable of cloud_admin (keystone v3) 
      please choose:[1|2|3|4] 

  2. Enter 1 to enable Keystone V3 authentication and enter the password of OS_USERNAME as prompted.

    Default account format: DCname_admin; default password: FusionSphere123.

  1. Run the following command to obtain the hash ID of the host where the alarm is generated:

    python -c 'print(hash("hostid"))'

    hostid indicates the ID of the host where the alarm is generated. The command output shows the hash ID of the host.

  2. Run the following command to obtain the WWN list of the remote LUNs reconnected to the host:

    cat /etc/huawei/fusionsphere/osConfig.storage/cfg/osConfig.storage.cfg.effect | python -mjson.tool | grep lun_wwn

    Information similar to the following is displayed:

    "lun_wwn": "6487b6b1004bc09524031c1e0000003d"

  3. Clear residual LUNs.

    Log in to DeviceManager, choose Provisioning > Host, search for host hash IDs by name, check each LUN one by one, and check whether the LUN is in the lun_wwn list queried in 7.

    • If yes, no further action is required.
    • If no, the LUN needs to be deleted. Take a note of the LUN.
    NOTE:

    Repeat this step until all LUNs are checked.

  4. On DeviceManager, remove the LUNs from the corresponding LUN groups recorded in 8 and delete the LUNs. For details, see the required OceanStor product documentation.
  5. Restart the host where the alarm is generated.
  6. Manually clear the alarm and check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 12.

  7. Contact technical support for assistance.

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Updated: 2019-08-30

Document ID: EDOC1100062365

Views: 36220

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