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

[Joseph Qi]

Hi Cédric,
I guess it is because your shared disk is formatted with only 2 slots.
You can check it using debugfs.ocfs2.
If it is, you may update slot count using tunefs.ocfs2 -N <num_of_slot>.
Hope it will help you.

Thanks,
Joseph

On 17/11/9 18:56, BASSAGET Cédric wrote:
> Hello,
> As I did not get help on users mailing list, I allow myself to post my
> question here. Sorry if it's not the right place, but I can't find any
> documentation.
> 
> I'm currently running an OCFS2 cluster on two hosts.
> My ocfs2 partition is an iscsi disk mounted on both hosts debian1 and
> debian2
> 
> I need to add a third host (debian3) 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.
> 
> root at debian1:~# cat /etc/ocfs2/cluster.conf
> node:
>         ip_port = 7777
>         ip_address = 192.168.0.11
>         number = 0
>         name = debian1
>         cluster = ocfs2
> node:
>         ip_port = 7777
>         ip_address = 192.168.0.12
>         number = 1
>         name = debian2
>         cluster = ocfs2
> cluster:
>         node_count = 2
>         name = ocfs2
> 
> Same config on debian2.
> 
> I try to add the new node to the cluster, running this command on nodes
> debian1 et debian2 :
> 
> root at debian1:~# o2cb_ctl -C -i -n debian3 -t node -a number=2 -a
> ip_address=192.168.0.13 -a ip_port=7777 -a cluster=ocfs2
> 
> my new node is added to the config file, and node_count is incremented to 3.
> 
> then I do a "systemctl reload ocfs2" on debian1 and debian2.
> I copy the cluster.conf file on debian3 and restart ocfs2 on it.
> 
> and in dmesg, I get :
> [  145.582469] o2net: Connected to node debian2 (num 1) at 192.168.0.12:7777
> [  145.582978] o2net: Connected to node debian1 (num 0) at 192.168.0.11:7777
> [  149.631921] o2dlm: Joining domain D2A1F74976E04C55B625CDC8DAC1D5E5
> [  149.631922] (
> [  149.631923] 0
> [  149.631924] 1
> [  149.631924] 2
> [  149.631925] ) 3 nodes
> [  149.634255] (mount.ocfs2,1627,0):ocfs2_find_slot:490 *ERROR: no free
> slots available!*
> [  149.634784] (mount.ocfs2,1627,0):ocfs2_mount_volume:1859 ERROR: status =
> -22
> [  153.738044] o2dlm: Leaving domain D2A1F74976E04C55B625CDC8DAC1D5E5
> [  153.738153] ocfs2: Unmounting device (254,0) on (node 2)
> [  153.738174] (mount.ocfs2,1627,0):ocfs2_fill_super:1218 ERROR: status =
> -22
> [  155.657295] o2net: No longer connected to node debian1 (num 0) at
> 192.168.0.11:7777
> [  155.657387] o2net: No longer connected to node debian2 (num 1) at
> 192.168.0.12:7777
> 
> 
> Can anyone tell me how I can add a slot, so my new node can work ?
> 
> Thanks for your help.
> Regards,
> Cédric
> 
> 
> 
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