Hi Guys & Gals,
A Gluster newbie question for sure, but something I just don't "get" (or I've missed in the doco, mailing lists, etc):
What happens to a Gluster Client when a Gluster Cluster Node goes off-line / fails-over?
How does the Client "know" to use (connect to) another Gluster Node in the Gluster Cluster?
Let me elaborate.
I've got four hosts: gfs1, gfs2, gfs3, and client4 sitting on 192.168.1.1/24, .2, .3, and .4 respectively.
DNS is set up and working correctly.
gfs1, gs2, and gfs3 form a "Gluster Cluster" with a Gluster Volume (gv1) replicated across all three nodes. This is all working correctly (ie a file (file1) created/modified on gfs1:/gv1 is replicated correctly to gfs2:/gv1 and gfs3:/gv1).
client4 has an entry in its
/etc/fstab file which reads: "gfs1:gv1 /data/gv1 glusterfs
defaults 0 2". This is also all working correctly (ie
client4:/data/gv1/file1 is accessible and replicated).
So, (and I haven't tested this yet) what happens to client4:/data/gv1/file1 when gfs1 fails (ie is turned off, crashes, etc)?
Does client4 "automatically" switch to using one of the other two Gluster Nodes, or do I have something wrong in clients4's /etc/fstab file, or an error/mis-configuration somewhere else?
I thought about setting some DNS entries along the lines of:
~~~
glustercluster IN A
192.168.0.1
glustercluster IN A 192.168.0.2
glustercluster IN A 192.168.0.3
~~~
and having clients4's /etc/fstab file read: "glustercluster:gv1 /data/gv1 glusterfs defaults 0 2", but this is a Round-Robin DNS config and I'm not sure how Gluster treats this situation.
So, if people could comment / point me in the correct direction I would really appreciate it - thanks.
Dulux-Oz
________ Community Meeting Calendar: Schedule - Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC Bridge: https://meet.google.com/cpu-eiue-hvk Gluster-users mailing list Gluster-users@xxxxxxxxxxx https://lists.gluster.org/mailman/listinfo/gluster-users
