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[OceanStor 9000] Failover Does Not Occur After a Device Node Fails

Latest reply: Jun 12, 2018 01:05:13 444 1 0 0 0
After a DeviceManager Node Fails, Failover Does Not Occur

 
After a node running the DeviceManager (aDeviceManager node for short) fails, no normal DeviceManager node automatically takes overthe services on the faulty node, disabling users from accessing the DeviceManager.

Symptom
1.     When you log in to DeviceManager, a messageis displayed stating "The communication is abnormal or the system is busy. Try againlater."

2.     After a DeviceManager node fails, no normalDeviceManager node automatically takes over the services on the faulty node, and theDeviceManager page is inaccessible, as shown in figure below :


 


 
Possible Causes
1.     Possible cause 1: The management IP address is switchingto another node due to a node restart or network exception.
2.     Possible cause 2: The DeviceManager software fails.
 
3.     Possible cause 3: The Cluster Management (CM) fails.



FaultDiagnosis




Procedures

 

1.     Possible cause 1: The management IP addressis switching to another node due to a node restart or network exception.


2.     Wait about 1 minute until the management IPaddress finishes switching to another node and then try to log in again.

       If yes, no further operations are required.
       If no,go to cause 2.

3.     Possible cause 2: The DeviceManager softwarefails.

        a. Use PuTTY to log in as user omuserto theOceanStor 9000 management IP address. Run the su command and      input the password of user root as prompted to switch to user root
        b. Run ps -ef |grep ibase tocheck whether the DeviceManager software process is normal (if there are records, the process isnormal; otherwise, the process is abnormal).

 

        If yes, go to c.
        If no,go to d.

 

c. Run ps -ef |grep httpd tocheck whether the DeviceManager software process is normal (if there are records, the process isnormal; otherwise, the process is abnormal).

       If yes, go to cause 3.

       If no,go to d.


d. Restart the DeviceManager. Run cd/opt/deviceManager/bin to go to the /bin directory.Then, run sh restart.sh.

e. Check whether you can successfully log into the DeviceManager.

       Ifyes, no further operations are required.

       If no,go to cause 3.


4.    Possible cause 3: The CM fails.

        a. Log in to the node.
        b. Run ps -ef |grep snas_cm tocheck whether the CM process is normal (if there are records, the CM process is normal; otherwise,the CM process is abnormal).

        If yes, contact technical support engineers.
        If no,go to c.

c. Restart the CM.

       i. Run ps -ef |grep cm tocheck the CM process number. The CM process number includes snas_cm.
       ii. Run kill -9 process number to end the CM process. The daemon will automatically start the CM process.

d. Restart the DeviceManager. Run cd/opt/deviceManager/bin to go to the /bin directory.Then, run sh restart.sh.


e. Check whether you can successfully log into the DeviceManager.

           If yes, no further operations are required.
       If no, contacttechnical support engineers.
 
 
END

This post was last edited by II at 2018-06-11 06:34.

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