How to remove a service group from a cluster.

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Article ID: 100022984

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Resolution

Approach 1:How to remove service group on the cluster with no interruption to the production application by restarting HAD

  1. Freeze all the service groups as a precaution.
# haconf -makerw
# hagrp -freeze -persistent
# haconf -dump -makero
  1. Stop HAD (with -force that will leave the actual resources running).
#hastop -all-force
 
3. Make a backup copy of the /etc/VRTSvcs/conf/config/main.cf file.
 
cp /etc/VRTSvcs/conf/config/main.cf /etc/VRTSvcs/conf/config/main.cf_bu
 
4. Edit and remove the service group from /etc/VRTSvcs/conf/config/main.cf
.
#vi /etc/VRTSvcs/conf/config/main.cf
Remove SG from main.cf.
 
5. Copy the configuration file to other nodes of the Cluster
 
# rcp /etc/VRTSvcs/conf/config/main.cf node2:/etc/VRTSvcs/conf/config/main.cf
 
6. Start VCS on all nodes
 
#hastart
 
 

Approach 2: Without restarting HAD

1. Permit dynamic changes to the VCS configuration file. 

#haconf -makerw

2. freeze all theservice groups.

#hagrp -freeze -persistent 

3. Remove any Service Group level dependencies. 

#hagrp -unlink

4. Remove resources from the service groups one by one :

    #hares -delete  

 5. Delete the service group :

    #hagrp -delete

 6. Verify that SG have been removed from VCS and unfreeze the other SGs which you want to :

#hagrp -unfreeze -persistent      

 7. Save the configuration

#haconf -dump -makero

 

 

Issue/Introduction

How to remove service group from a cluster.
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