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FusionCloud Troubleshooting Guide 03

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Database Access or Data Exception

Database Access or Data Exception


An ELB database access or ELB data error occurs.

Possible Causes

  • The MySQL process on the ELB database node is running improperly.
  • The data in the ELB database table is incorrectly processed.


  1. Use PuTTY to log in to the netcluster_elb_db_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 MySQL process is running properly:

    ps -ef|grep mysql

    • If yes, go to 7.
    • If no, go to 3.

  3. Run the following command and enter the password Cloud12#$ of user root to switch to user root:

    sudo su - root

  4. Run the following command to disable logout upon timeout:


  5. Run the following command to enter the ELB service database:

    su slb

  6. Run the following command to start the database service:

    /var/elb/packages/mysql/support-files/mysql.server start

  7. Run the following command to log in to the database:

    /var/elb/packages/mysql/bin/mysql -uelb -p{Password of database user elb}

  8. Run the following command to query the data tables and check whether all databases are displayed in the command output:

    show databases;

    use elb;

    show tables;

    • If yes, the database contains no less than five data tables, the following information is displayed:
      mysql> use elb;
      Reading table information for completion of table and column names
      You can turn off this feature to get a quicker startup with -A
      mysql> show tables;
      | Tables_in_elb     |
      | healthcheck       |
      | listeners         |
      | loadbalancer_host |
      | loadbalancers     |
      | loadbalancers_his |
      | members           |
      | quotas            |
      | unify_num         |
      8 rows in set (0.00 sec)
    • If no, contact technical support for assistance.

Updated: 2019-08-16

Document ID: EDOC1100063248

Views: 25237

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