[Ocfs2-users] Adding new node to an online OCFS2 cluster

[Changwei Ge]

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
> 
>