zfs discuss - Dec 2007 - HA-NFS AND HA-ZFS

We are currently running sun cluster 3.2 on solaris 10u3. We are using ufs/vxvm
4.1 as our shared file systems. However, I would like to migrate to HA-NFS on
ZFS. Since there is no conversion process from UFS to ZFS other than copy, I
would like to migrate on my own time. To do this I am planning to add a new
zpool HAStoragePlus resource to my existing HA-NFS resource group. This way I
can migrate data from my existing UFS to ZFS on my own time and the clients will
not know the difference.

I made sure that the zpool was available on both nodes of the cluster. I then
created a new HAStoragePlus resource for the zpool. I updated my NFS resource to
depend on both HAStoragePlus resources. I added the two test file systems to the
current dfstab.nfs-rs file.
I manually ran the shares and I was able to mount the new zfs file system.
However, once the monitor ran it re-shared I guess and now the ZFS based
filesystems are not available.

I read that you are not to add the ZFS based file systems to the
FileSystemMountPoints property. Any ideas?
 
 
This message posted from opensolaris.org

Hello Matthew,

Monday, December 17, 2007, 5:45:12 PM, you wrote:

MCA> We are currently running sun cluster 3.2 on solaris 10u3. We are
MCA> using ufs/vxvm 4.1 as our shared file systems. However, I would
MCA> like to migrate to HA-NFS on ZFS. Since there is no conversion
MCA> process from UFS to ZFS other than copy, I would like to migrate
MCA> on my own time. To do this I am planning to add a new zpool
MCA> HAStoragePlus resource to my existing HA-NFS resource group. This
MCA> way I can migrate data from my existing UFS to ZFS on my own time
MCA> and the clients will not know the difference.

MCA> I made sure that the zpool was available on both nodes of the
MCA> cluster. I then created a new HAStoragePlus resource for the
MCA> zpool. I updated my NFS resource to depend on both HAStoragePlus
MCA> resources. I added the two test file systems to the current
dfstab.nfs-rs file.
MCA> I manually ran the shares and I was able to mount the new zfs
MCA> file system. However, once the monitor ran it re-shared I guess
MCA> and now the ZFS based filesystems are not available.

MCA> I read that you are not to add the ZFS based file systems to the
MCA> FileSystemMountPoints property. Any ideas?

You just use Zpool property and not FileSystemMountPoints with ZFS.

Check
http://milek.blogspot.com/2006/09/zfs-in-high-availability-environments.html
for step-by-step example.

btw: for testing, if you really have to test it on production cluster,
I would first create a new test resource group with only two resources
- IP (logicalhostname) and hastorageplus with zfs pool. Then check if
you can failover, failback, etc. once you prove it you know how it
workse, move the resource to production rg.


-- 
Best regards,
 Robert Milkowski                           mailto:rmilkowski at task.gda.pl
                                       http://milek.blogspot.com