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HUAWEI CLOUD Stack 6.5.0 Troubleshooting Guide 02

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LVS Cluster Fault

LVS Cluster Fault


The LVS cluster becomes faulty, and services on the data plane are unavailable.

Possible Causes

  • Keepalived processes of the LVS cluster are running improperly.
  • Configuration files are inconsistent between VMs in the LVS cluster.


  1. Use PuTTY to log in to the netcluster_elb_lvs_vm_1_01 node.

    The default username is elb and the default password is cnp200@HW.

  2. Run the following command to check whether the Keepalived process is running properly:

    ps -ef|grep keepalived
    • If yes, the command output contains three Keepalived processes. Go to 4.
      -bash-4.1$ ps -ef|grep keepalived
      elb      19782 19741  0 07:46 pts/0    00:00:00 grep keepalived
      root     39607     1  0 Jul29 ?        00:00:00 /usr/local/sbin/keepalived
      root     39610 39607  0 Jul29 ?        00:00:05 /usr/local/sbin/keepalived
      root     39611 39607  0 Jul29 ?        00:00:00 /usr/local/sbin/keepalived
    • If no, the command output does not contain three processes, go to 3.

  3. Run the following command to start the Keepalived process:

    sudo /etc/init.d/keepalived start

  4. Run the following command to check whether the data service of a specified VIP is running properly:

    sudo ipvsadm -Ln -t IP address of the VIP data service:Port number

    • If yes, the command output contains the list of back-end VMs:
      [elb@lvs2 mult_works]#sudo  ipvsadm -Ln -t
      Prot LocalAddress:Port Scheduler Flags
      -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
      TCP rr synproxy
      ->            FullNat 6      0          0
      ->            FullNat 6      0          0
      ->            FullNat 6      0          0
    • If no, the command output does not contain the backend VM list.

  5. Log in to the netcluster_elb_lvs_vm_1_02 node and perform 2.
Updated: 2019-06-01

Document ID: EDOC1100062375

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