From 2da9e1f473b23037be18a09befd34324c4e9b4aa Mon Sep 17 00:00:00 2001
From: Kotresh HR <khiremat@redhat.com>
Date: Thu, 5 Dec 2019 11:23:00 +0530
Subject: [PATCH] stop: Unmount cephFS volumes

When stop.sh is run while the cephFS is mounted,
mount processes are retained and can't be killed.
And also the mount and df commands hang after this.
This patch unmounts the mounted volumes cleanly.

Signed-off-by: Kotresh HR <khiremat@redhat.com>
---
 src/stop.sh | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/stop.sh b/src/stop.sh
index a2073ad546b..0a71752d1d4 100755
--- a/src/stop.sh
+++ b/src/stop.sh
@@ -38,6 +38,36 @@ do_killall() {
     $SUDO killall -u $MYNAME $1
 }
 
+do_umountall() {
+    #VSTART_IP_PORTS is of the format as below
+    #"[v[num]:IP:PORT/0,v[num]:IP:PORT/0][v[num]:IP:PORT/0,v[num]:IP:PORT/0]..."
+    VSTART_IP_PORTS=$(bin/ceph mon metadata 2>/dev/null | jq -j '.[].addrs')
+
+    #SRC_MNT_ARRAY is of the format as below
+    #SRC_MNT_ARRAY[0] = IP:PORT,IP:PORT,IP:PORT:/
+    #SRC_MNT_ARRAY[1] = MNT_POINT1
+    #SRC_MNT_ARRAY[2] = IP:PORT:/ #Could be mounted using single mon IP
+    #SRC_MNT_ARRAY[3] = MNT_POINT2
+    #...
+    SRC_MNT_ARRAY=($(findmnt -t ceph -n --raw --output=source,target))
+    LEN_SRC_MNT_ARRAY=${#SRC_MNT_ARRAY[@]}
+
+    for (( i=0; i<${LEN_SRC_MNT_ARRAY}; i=$((i+2)) ))
+    do
+      # The first IP:PORT among the list is checked against vstart monitor IP:PORTS
+      IP_PORT1=$(echo ${SRC_MNT_ARRAY[$i]} | awk -F ':/' '{print $1}' | awk -F ',' '{print $1}')
+      if [[ "$VSTART_IP_PORTS" == *"$IP_PORT1"* ]]
+      then
+        CEPH_MNT=${SRC_MNT_ARRAY[$((i+1))]}
+        [ -n "$CEPH_MNT" ] && sudo umount -f $CEPH_MNT
+      fi
+    done
+
+    #Get fuse mounts of the cluster
+    CEPH_FUSE_MNTS=$(bin/ceph tell mds.* client ls 2>/dev/null| grep mount_point | tr -d '",' | awk '{print $2}')
+    [ -n "$CEPH_FUSE_MNTS" ] && sudo umount -f $CEPH_FUSE_MNTS
+}
+
 usage="usage: $0 [all] [mon] [mds] [osd] [rgw] [--crimson]\n"
 
 stop_all=1
@@ -84,6 +114,9 @@ while [ $# -ge 1 ]; do
 done
 
 if [ $stop_all -eq 1 ]; then
+    #Umount mounted filesystems from vstart cluster
+    do_umountall
+
     if "${CEPH_BIN}"/rbd device list -c $conf_fn >/dev/null 2>&1; then
         "${CEPH_BIN}"/rbd device list -c $conf_fn | tail -n +2 |
         while read DEV; do
-- 
2.39.5