Matus -
Gluster has automatic, built-in failover if you are using replica nodes.
ucarp is only required if you want highly available NFS mounts.
To use ucarp with Gluster you should -
1. Install Gluster and create a replica volume. [1]
1. DO NOT use the virtual IPs when you peer probe or create
the volume, that won't work.
2. Set the ping-timeout volume option to 25 seconds. [2]
2. Install and setup ucarp.
3. Mount your NFS clients using the VIPs.
4. Mount your glusterfs clients using the real IP addresses.
We mostly use CTDB because it supports NFS and Samba, I can't attach a
document here but I'll email you directly with the documentation.
[1]
http://gluster.com/community/documentation/index.php/Gluster_3.2:_Configuring_Distributed_Replicated_Volumes
[2]
http://gluster.com/community/documentation/index.php/Gluster_3.2:_Setting_Volume_Options
Thanks,
Craig
--
Craig Carl, Senior Systems Engineer | Gluster
408.829.9953(PST) | http://gluster.com
http://www.gluster.com/gluster-for-aws/
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE5666F925A557DD8
On 6/6/11 12:09 AM, bxmatus at gmail.com wrote:
> Hello everybody.
>
> I have a problem setting up gluster failover funcionality. Based on
> manual i setup ucarp which is working well ( tested with ping/ssh etc
> )
>
> But when i use virtual address for gluster volume mount and i turn off
> one of nodes machine/gluster will freeze until node is back online.
>
> My virtual ip is 3.200 and machine real ip is 3.233 and 3.5. In
> gluster log i can see:
>
> [2011-06-06 02:33:54.230082] I
> [client-handshake.c:913:client_setvolume_cbk] 0-atlas-client-1:
> Connected to 192.168.3.233:24009, attached to re
> mote volume '/atlas'.
> [2011-06-06 02:33:54.230116] I [afr-common.c:2514:afr_notify]
> 0-atlas-replicate-0: Subvolume 'atlas-client-1' came back up; going
> online.
> [2011-06-06 02:33:54.237541] I [fuse-bridge.c:3316:fuse_graph_setup]
> 0-fuse: switched to graph 0
> [2011-06-06 02:33:54.237801] I [fuse-bridge.c:2897:fuse_init]
> 0-glusterfs-fuse: FUSE inited with protocol versions: glusterfs 7.13
> kernel 7.13
> [2011-06-06 02:33:54.238757] I [afr-common.c:836:afr_fresh_lookup_cbk]
> 0-atlas-replicate-0: added root inode
> [2011-06-06 02:33:54.272650] I
> [client-handshake.c:913:client_setvolume_cbk] 0-atlas-client-0:
> Connected to 192.168.3.5:24009, attached to remo
> te volume '/atlas'.
>
>
> Even when IP i'm using at mount is 3.200 ... Its look like that at the
> end gluster is using real machine IP's even when i'm connecting to
> virtual. Is there a way
> how to turn this functionality off or it is just broken ?
>
> thanks for answer
>
> Matus
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