|
Hi, Is
it possible to permanently remove a node from a running cluster ? All
my attempts result in the node being in the state "offline,
estranged", and the node still counting as a member in the "Nodes:
" count from cman_tool status ( but not in the "Expected votes:"
count - so I think the quorum size is correct). It
appears that the only way to permanently remove references to a node is to
restart cman on the surviving nodes. My
procedure for removing the node is: 1.
relocate
any services running on the node 2.
edit
cluster.conf to remove the node from clusternodes 3.
push
the config to the cluster with ccs_tool 4.
stop
rgmanager on the node to be removed 5.
stop
cman on the node to be removed. At
this point, clustat on a surviving node shows: Cluster Status for EDISV1DBM @ Mon Jun 21 09:46:45
2010 Member Status: Quorate Member
Name
ID Status ------
----
---- ------ svXprdclu002 2
Online, Local, rgmanager svXprdclu003
3 Online, rgmanager svXprdclu004
4 Online, rgmanager svXprdclu005
5
Online, rgmanager svXprdclu001
1 Offline, Estranged Service
Name
Owner (Last)
State -------
---- -----
------
----- service:ACTIVESITE
svXprdclu002
started service:MASTERVIP
svXprdclu002
started The
removed node (svXprdclu001) is still known to the cluster, but is now
"estranged". The
node has been removed from the "Expected votes" count, but not the
"Nodes" count: sudo /usr/sbin/cman_tool status Version: 6.2.0 Config Version: 19 Cluster Name: EDISV1DBM Cluster Id: 35945 Cluster Member: Yes Cluster Generation: 1008 Membership state: Cluster-Member Nodes: 5 Expected votes: 4 Total votes: 4 Quorum: 3 Active subsystems: 8 Flags: Dirty Ports Bound: 0 177 Node name: svXprdclu004 Node ID: 4 Multicast addresses: 239.192.0.1 Node addresses: 10.3.18.24 If
I then choose a node (not running the services) and restart cman, this node no
longer _sees_ the removed node: [martin@cp1edidbm003 ~]$ sudo /usr/sbin/clustat Cluster Status for EDISV1DBM @ Mon Jun 21 09:53:34
2010 Member Status: Quorate Member
Name
ID Status ------
----
---- ------ svXprdclu002
2 Online svXprdclu003
3 Online, Local svXprdclu004
4
Online svXprdclu005
5 Online [martin@cp1edidbm003 ~]$ sudo /usr/sbin/cman_tool
status Version: 6.2.0 Config Version: 19 Cluster Name: EDISV1DBM Cluster Id: 35945 Cluster Member: Yes Cluster Generation: 1008 Membership state: Cluster-Member Nodes: 4 Expected votes: 4 Total votes: 4 Quorum: 3 Active subsystems: 7 Flags: Dirty Ports Bound: 0 Node name: svXprdclu003 Node ID: 3 Multicast addresses: 239.192.0.1 Node addresses: 10.3.18.23 However,
I would prefer not to relocate my services in order to restart cman on every
node. |
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