[Ocfs2-users] Adding new node to an online OCFS2 cluster
Changwei Ge
ge.changwei at h3c.com
Tue Nov 7 03:12:31 PST 2017
On 2017/11/7 19:02, BASSAGET Cédric wrote:
> I've set-up a lab with a 2-node OCFS2 cluster and a new third one.
>
> I ran, on the two nodes :
> o2cb_ctl -C -i -n hostC -t node -a number=2 -a ip_address=192.168.0.18
> -a ip_port=7777 -a cluster=ocfs2
> systemctl reload ocfs2
>
> then I copied the config file on hostC and restart ocfs2 on hostC.
>
> I get the error :
> [ 7594.853214] (mount.ocfs2,11753,0):ocfs2_find_slot:490 ERROR: no free
> slots available!
> [ 7594.853467] (mount.ocfs2,11753,0):ocfs2_mount_volume:1859 ERROR:
> status = -22
>
> Any idea ?
Hi,
I think this may be caused by two possible reasons:
1. You are mount ocfs2 while doing mkfs
2. You configured your cluster maximum slot to 2. You can use
debugfs.ocfs2 to make sure what maximum slot you configured.
Thanks,
Changwei
>
> 2017-11-07 8:37 GMT+01:00 BASSAGET Cédric <cedric.bassaget.ml at gmail.com
> <mailto:cedric.bassaget.ml at gmail.com>>:
>
> Hello,
> I'm currently running an OCFS2 cluster on two hosts.
> My ocfs2 partition is an iscsi disk mounted on both hosts.
>
> I need to add a third host to this cluster.
> I've set up iscsi (& multipath), but now I'm looking for the
> correct way to add the ocfs2 partition to my existing cluster.
>
> Actual hosts : hostA and hostB (same config) :
> root at hostA:~# cat /etc/ocfs2/cluster.conf
> node:
> Â Â Â Â ip_port = 7777
> Â Â Â Â ip_address = 192.168.155.16
> Â Â Â Â number = 1
> Â Â Â Â name = virtm5
> Â Â Â Â cluster = ocfs2
> node:
> Â Â Â Â ip_port = 7777
> Â Â Â Â ip_address = 192.168.155.17
> Â Â Â Â number = 2
> Â Â Â Â name = virtm6
> Â Â Â Â cluster = ocfs2
> cluster:
> Â Â Â Â node_count = 2
> Â Â Â Â name = ocfs2
>
> hostC has no cluster.conf file.
>
> How do I "Live-add" hostC to this existing cluster ? I did not find
> a doc explaining this. Maybe I did not look in the right place...
> Found that :
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.waldersten.net_content.php-3F_archives_61-2DAdd-2DOCFS2-2Dnode-2Dto-2Donline-2Dcluster.html&d=DwIFAw&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=wXmkJNAUtutY0U9inuQWCbzSSRji5zLpyR0a_Mek4jM&m=l0zcLmA6UBlW7CEmhBlW4E57AOLBfUfmpeup9AvTPqI&s=7l-chzEu5syF6mGLU2Za6UxxmbMfomgcyWmSvS1cuic&e=
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.waldersten.net_content.php-3F_archives_61-2DAdd-2DOCFS2-2Dnode-2Dto-2Donline-2Dcluster.html&d=DwMFaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=wXmkJNAUtutY0U9inuQWCbzSSRji5zLpyR0a_Mek4jM&m=S4rtHTCCLTEz4uJSf3vcOPhgc5P0uiR5olS--k7Sx1U&s=BJRSHas5eCx6pxrNx4EAli6_8wgGJJhwck10fffvEwY&e=>
> but I would prefer an official doc.
>
> Regards,
> Cédric
>
>
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