8:41 p.m.
Hello,
I want to setup an active-passive two node nfsv4 only cluster.
Is it safe to have /var/lib/nfs/ganesha on shared storage with both
instances of ganesha running but only one owning the sole VIP, so only
one node is answering client requests / updating the recovery files?
I.e., by safe, I mean the recovery files will not get corrupted /
deleted by the other node?
I see paths "node0" that suggest that a shared storage use case was
considered.
/var/lib/nfs/ganesha/v4old/node0
/var/lib/nfs/ganesha/v4recov/node0
But, I don't see anywhere in the man pages to indicate that an instance
is e.g., node1.
And, if there was, I would need a way to tell node1 to use node0's
recovery files when node1 becomes master.
If safe, my thought was to have a keepalived notify script run something
like this when a node enters MASTER state. But, if there were separate
node0 and node1 recovery file paths, I don't see how to tell nodeX to
use nodeY's recovery files on failover initiated recovery:
dbus-send --system --dest=org.ganesha.nfsd
/org/ganesha/nfsd/admin org.ganesha.nfsd.admin.grace
string:5:${VIP}
If the shared storage recovery bit is OK, is there anything I need to
add to the nfs-ganesha config to make this work? And, does that dbus
command look OK?
I'm running nfs-ganesha version 2.7.1 packaged in Debian Buster. I have
2X working nfs-ganesha single node setups using gluster FSAL that I hope
to turn into an nfs cluster.
Regards