No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

HUAWEI CLOUD Stack 6.5.0 Alarm and Event Reference 04

Rate and give feedback:
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-6014 DNS Server Disconnected

ALM-6014 DNS Server Disconnected

Description

FusionSphere OpenStack periodically (default interval: 1 minute) checks the domain name system (DNS) server connection status. This alarm is generated when the DNS server is disconnected.

Attribute

Alarm ID

Alarm Severity

Auto Clear

6014

Major

Yes

Parameters

Name

Meaning

Fault Location Info

  • region: specifies the name of the region for which the alarm is generated.
  • Object: specifies the name of the service for which the alarm is generated.

Additional Info

server: specifies the IP address of the DNS server for which the alarm is generated.

Impact on the System

The system cannot access the external DNS server, resulting in failures in domain name resolution across AZs.

Possible Causes

  • The network is faulty.
  • The external DNS server is faulty.

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

  4. 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] 

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

    Default account format: DCname_admin; default password: FusionSphere123.

  6. Run the following command to query the external DNS server IP address:

    cps template-params-show --service dns dns-server

    Information similar to the following is displayed:

      +----------+------------------------------------------+ 
      | Property | Value                                    | 
      +----------+------------------------------------------+ 
      | address  | /az1.dc1.domainname.com/192.168.211.10   | 
      | network  | [{"ip": "192.168.211.222", "systeminterf | 
      |          | ace": "external_api", "mask": "24", "gat | 
      |          | eway": "192.168.211.1"}]                 | 
      | server   | /#/192.168.222.230#53@external_api       | 
      +----------+------------------------------------------+     

    192.168.222.230 (example) is the external DNS server IP address.

  7. Run the following command to check whether the system can communicate with the external DNS server:

    ping IP address of the external DNS server

    • If the external DNS server can be pinged, go to 8.
    • If the external DNS server cannot be pinged, go to 10.

  8. Check whether the external DNS server is using the bind suite.

    • If yes, go to 9.
    • If no, go to 11.

  9. Add the com domain setting to the zone configuration file.

    For example:

    zone "com" in 
    { 
      type master; 
      file "named.empty"; 
      };     

    No further action is required.

  10. Contact the network administrator to troubleshoot the network and then check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 11.

  11. Have the third-party DNS server administrator to check whether the external DNS server is faulty.

    • If yes, go to 12.
    • If no, go to 13.

  12. Have the third-party DNS server administrator to troubleshoot the external DNS server and then check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 13.

  13. Contact technical support for assistance.

Related Information

After the third-party DNS server is restored, if the system DNS resolution function is not restored due to the DNS cache, clear the DNS cache in the FusionSphere OpenStack system. For details, see "How Can I Clear DNS Cache?" in the HUAWEI CLOUD Stack 6.5.0 O&M Guide.

Translation
Download
Updated: 2019-08-30

Document ID: EDOC1100062365

Views: 35723

Downloads: 31

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next