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Operating Systems Linux Red Hat Switching services from active node to failovernode in cluster Post 302969241 by vamshigvk475 on Sunday 20th of March 2016 10:18:17 AM
Old 03-20-2016
RedHat Switching services from active node to failovernode in cluster

Hi All,

I was asked to Switch the service from failover to active node as we need to reboot active node for regular maintenance. Unfortunately our senior admin left the organization. It would be helpful if some one answer this query. Detailed info with steps will be appreciated.


Here are the below details. I need to reboot lab1 and need to switch all services to lab2 or lab3.

I believe the /appfs is related to cluster. I'm bit rusty with cluster administration Smilie
Please help!!!Smilie

Code:
#hostname
lab2

#clustat

 Member Name                              Status
    ------ ----                              ------
    lab1-int                             Online, rgmanager
    lab2-int                             Online, Local, rgmanager
    lab3-int                             Online, rgmanager
   
    Service Name         Owner (Last)                   State
    ------- ----         ----- ------                   -----
    app_gfs_svc         lab2-int                   started
    app_prod            lab1-int                   started
    app_test            (lab1-int)                 disabled
    app_upgrade         (none)                         disabled


  # df -TPH /appfs
  Filesystem    Type     Size   Used  Avail Use% Mounted on
  /dev/dm-50     gfs      32G    24G   8.3G  75% /appfs


Last edited by Scrutinizer; 03-20-2016 at 12:05 PM.. Reason: code tags
 

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CRM_STANDBY(8)							  [FIXME: manual]						    CRM_STANDBY(8)

NAME
crm_standby - manipulate a node's standby attribute to determine whether resources can be run on this node SYNOPSIS
crm_standby [-?|-V] -D -u|-U node -r resource crm_standby [-?|-V] -G -u|-U node -r resource crm_standby [-?|-V] -v string -u|-U node -r resource [-l string] DESCRIPTION
The crm_standby command manipulates a node's standby attribute. Any node in standby mode is no longer eligible to host resources and any resources that are there must be moved. Standby mode can be useful for performing maintenance tasks, such as kernel updates. Remove the standby attribute from the node when it should become a fully active member of the cluster again. By assigning a lifetime to the standby attribute, determine whether the standby setting should survive a reboot of the node (set lifetime to forever) or should be reset with reboot (set lifetime to reboot). Alternatively, remove the standby attribute and bring the node back from standby manually. OPTIONS
--help, -? Print a help message. --verbose, -V Turn on debug information. Note Increase the level of verbosity by providing additional instances. --quiet, -Q When doing an attribute query using -G, print just the value to stdout. Use this option with -G. --get-value, -G Retrieve rather than set the preference. --delete-attr, -D Specify the attribute to delete. --attr-value string, -v string Specify the value to use. This option is ignored when used with -G. --node-uuid node_uuid, -u node_uuid Specify the UUID of the node to change. --node-uname node_uname, -U node_uname Specify the uname of the node to change. --lifetime string, -l string Determine how long this preference lasts. Possible values are reboot or forever. Note If a forever value exists, it is always used by the CRM instead of any reboot value. EXAMPLES
Have a local node go to standby: crm_standby -v true Have a node (node1) go to standby: crm_standby -v true -U node1 Query the standby status of a node: crm_standby -G -U node1 Remove the standby property from a node: crm_standby -D -U node1 Have a node go to standby for an indefinite period of time: crm_standby -v true -l forever -U node1 Have a node go to standby until the next reboot of this node: crm_standby -v true -l reboot -U node1 FILES
/var/lib/heartbeat/crm/cib.xml--the CIB (minus status section) on disk. Editing this file directly is strongly discouraged. SEE ALSO
???, ??? AUTHOR
crm_standby was written by Andrew Beekhof. [FIXME: source] 07/05/2010 CRM_STANDBY(8)
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