extras: clean up a brick's gfid xattr

* extras/clear_xattrs.sh: This script enables a brick from a
deleted volume(stale brick) to be used in a new volume by
clearing all the trusted.gfid xattr from the brick tree.

* One should run this script on all machines which have
stale bricks if one wants to re-use the same bricks
for a new volume.

NOTE: This script *SHOULD BE RUN ONLY AFTER STOPPING A VOLUME*,
thereby ensuring that no replace-brick or rebalance operations
are on-going.

Change-Id: I35a4a2784fe502749184b87299b1a043b8e48e90
BUG: 765572
Signed-off-by: Rajesh Amaravathi <rajesh@redhat.com>
Reviewed-on: http://review.gluster.com/781
Reviewed-by: Amar Tumballi <amar@gluster.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vijay@gluster.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/extras/clear_xattrs.sh b/extras/clear_xattrs.sh
new file mode 100755
index 000000000..bdce5b895
--- /dev/null
+++ b/extras/clear_xattrs.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Clear the trusted.gfid xattr in the brick tree
+
+# This script must be run only on a stopped brick/volume
+# Stop the volume to make sure no rebalance/replace-brick
+# operations are on-going
+
+# Not much error checking
+remove_xattrs ()
+{
+    find "$1" -exec setfattr -h -x "trusted.gfid" '{}' \;  > /dev/null 2>&1;
+    find "$1" -exec setfattr -h -x "trusted.glusterfs.volume-id" '{}' \;  > /dev/null 2>&1;
+}
+
+main ()
+{
+    if [ -z "$1" ]; then
+        echo "Please specify the brick path(s)";
+        exit 1;
+    fi
+
+    which getfattr > /dev/null 2>&1;
+    if [ $? -ne 0 ]; then
+        echo "attr package missing";
+        exit 1;
+    fi
+
+    which setfattr > /dev/null 2>&1;
+    if [ $? -ne 0 ]; then
+        echo "attr package missing";
+        exit 1;
+    fi
+
+    for brick in "$@";
+    do
+        echo "xattr clean-up in progress: $brick";
+        remove_xattrs "$brick";
+        echo "$brick ready to be used as a glusterfs brick";
+    done;
+}
+
+main "$@";
\ No newline at end of file