Unable to mount SAM-QFS file system after IP address changed
After changing the IP address of a SAM-QFS server clients are unable to mount the SAM-QFS file systems.
When attempting to mount the SAM-QFS file sytems, we get the following error:
# mount samqfs1 mount_samfs: sc_mount () error: Transport endpoint is not connectedIn the
sam-log
on the server, we see:
Info OS call Error: FS samqfs1: Short read from server; Shutting down Info OS call Error: FS samqfs1: Unsuccessful server message exchange
And on the SAM-QFS clients we are seeing:
Info OS call Error: SetServerSocket: Inappropriate ioctl for device
The issue is generally caused by one of the following:
- There is no connectivity to the metadata server
- Hostnames don't match
In our case, the latter was the problem. Basically, sam-fsd
still contains the old IP information.
Running samsharefs
with the -R
option confirms this:
# samsharefs -R samqfs1 # # Host file for family set 'samqfs1' # # Version: 4 Generation: 18 Count: 6 # Server = host 0/schlumpf, length = 192 # 192.168.1.1 1 0 server 192.168.1.2 2 0 192.168.1.3 3 0
In the above output, we see that the old IP addresses are still listed. To resolve the issue we issue the samsharefs -u -R
# samsharefs -u -R samqfs1 # # Host file for family set 'samqfs1' # # Version: 4 Generation: 18 Count: 6 # Server = host 0/schlumpf, length = 192 # 10.1.1.10 1 0 server 10.1.1.11 2 0 10.1.1.12 3 0
Procedure
The correct procedure to modify the IP address and/or add additional clients, perform:
- Edit
/etc/opt/SUNWsamfs/hosts
on the server to change the IP addreses of the metadata servers, and/or add the new client: - Update the binary hosts file on the server:
- If the file system is mounted:
# samsharefs -u
- If the file system is unmounted:
# samsharefs -u -R
- If the file system is mounted:
If you need to remove a client you must firstly unmount the file system from the clients, then the server before make the necessary changes.