bbefeffafe
Introduce /var/lib/glusterfs/nfs/rmtab to contain a list of NFS-clients which have a volume mounted. The volume option 'nfs.mount-rmtab' can be set to an alternative filename. When the file is located on shared storage, multiple gNFS servers can use the same file to present a single NFS-server. This cache is read when a system administrator calls 'showmount -a' and updated when an NFS-client calls MNT or UMNT from the MOUNT protocol. Usage: - create a volume for storing the shared rmtab file - mount the volume on all storage servers, at the same location - make sure that the volume is mounted at boot (add to /etc/fstab) - place the rmtab file on the volume: # gluster volume set <VOLUME> nfs.mount-rmtab <MOUNTPOINT>/<FILENAME> - any subsequent mount requests will add an entry to this file - 'showmount -a' requests will return the NFS-clients using the cluster Note: The NFS-server does currently not support reconfigure(). When a configuration option is set/changed, the NFS-server glusterfs process gets restarted. This causes the active NFS-clients to be forgotten (the entries are saved in the old rmtab, but we do not have a reference to that file any more, so we can't re-add them). Therefor a re-mount done by the NFS-clients is needed before they get listed in the rmtab again. Change-Id: I58f47135d60ad112849d647bea4e1129683dd2b3 BUG: 904065 Signed-off-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/4430 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Harshavardhana <harsha@harshavardhana.net> Tested-by: Harshavardhana <harsha@harshavardhana.net> Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
91 lines
2.6 KiB
Bash
Executable File
91 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# This test does not use 'showmount' from the nfs-utils package, it would
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# require setting up a portmapper (either rpcbind or portmap, depending on the
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# Linux distribution used for testing). The persistancy of the rmtab should not
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# affect the current showmount outputs, so existing regression tests should be
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# sufficient.
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#
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# count the lines of a file, return 0 if the file does not exist
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function count_lines()
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{
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if [ -e "$1" ]
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then
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wc -l < $1
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else
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echo 0
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fi
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}
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. $(dirname $0)/../include.rc
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. $(dirname $0)/../nfs.rc
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cleanup
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TEST glusterd
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TEST pidof glusterd
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TEST $CLI volume create $V0 $H0:$B0/brick1
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EXPECT 'Created' volinfo_field $V0 'Status'
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TEST $CLI volume start $V0;
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EXPECT 'Started' volinfo_field $V0 'Status'
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# glusterfs/nfs needs some time to start up in the background
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EXPECT_WITHIN 20 1 is_nfs_export_available
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# before mounting the rmtab should be empty
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EXPECT '0' count_lines /var/lib/glusterd/nfs/rmtab
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TEST mount -t nfs -o vers=3,nolock $H0:/$V0 $N0
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# the output would looks similar to:
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#
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# hostname-0=172.31.122.104
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# mountpoint-0=/ufo
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#
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EXPECT '2' count_lines /var/lib/glusterd/nfs/rmtab
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# duplicate mounts should not be recorded (client could have crashed)
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TEST mount -t nfs -o vers=3,nolock $H0:/$V0 $N1
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EXPECT '2' count_lines /var/lib/glusterd/nfs/rmtab
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# removing a mount should (even if there are two) should remove the entry
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TEST umount $N1
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EXPECT '0' count_lines /var/lib/glusterd/nfs/rmtab
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# unmounting the other mount should work flawlessly
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TEST umount $N0
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EXPECT '0' count_lines /var/lib/glusterd/nfs/rmtab
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TEST glusterfs --entry-timeout=0 --attribute-timeout=0 --volfile-server=$H0 --volfile-id=$V0 $M0
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# we'll create a fake rmtab here, similar to how an other storage server would do
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# using an invalid IP address to prevent (unlikely) collisions on the test-machine
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cat << EOF > $M0/rmtab
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hostname-0=127.0.0.256
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mountpoint-0=/ufo
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EOF
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EXPECT '2' count_lines $M0/rmtab
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# reconfigure merges the rmtab with the one on the volume
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TEST gluster volume set $V0 nfs.mount-rmtab $M0/rmtab
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# glusterfs/nfs needs some time to restart
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EXPECT_WITHIN 20 1 is_nfs_export_available
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# a new mount should be added to the rmtab, not overwrite exiting ones
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TEST mount -t nfs -o vers=3,nolock $H0:/$V0 $N0
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EXPECT '4' count_lines $M0/rmtab
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TEST umount $N0
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EXPECT '2' count_lines $M0/rmtab
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# TODO: nfs/reconfigure() is never called and is therefor disabled. When the
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# NFS-server supports reloading and does not get restarted anymore, we should
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# add a test that includes the merging of entries in the old rmtab with the new
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# rmtab.
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cleanup
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