integ/base/cluster-resource-agents/centos/patches/lvm_vg_activation.patch

From 3304fb0e1f1eeb2bfe52611541c5dd12bdc908e0 Mon Sep 17 00:00:00 2001
From: Scott Little <scott.little@windriver.com>
Date: Mon, 2 Oct 2017 15:12:54 -0400
Subject: [PATCH 06/13] WRS: Patch1110: lvm_vg_activation.patch

---
 heartbeat/LVM | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 116 insertions(+), 14 deletions(-)

diff --git a/heartbeat/LVM b/heartbeat/LVM
index 5de88b6..3a52e56 100755
--- a/heartbeat/LVM
+++ b/heartbeat/LVM
@@ -449,6 +449,81 @@ retry_exclusive_start()
 }
 
 #
+#    Activate one volume explicitly.
+#
+activate_volume() {
+        ocf_run lvchange $1 /dev/${2}/$3
+        if [ $? -eq 0 ] ; then
+            ocf_log info "Succesfully activated $LV."
+        else
+            ocf_log err "Problem activating $LV."
+        fi
+}
+
+#
+#    Kick off parallel activation of all volumes
+#
+activate_all_volumes() {
+   VG=$1
+   shift
+   lvchange_args="$*"
+
+   # Get the list of volumes, without the first line which is column headings.
+   VOLS=`lvs $VG |tail -n +2`
+
+   while read -r LINE; do
+       # Convert the line into an array.
+       LINE_ARRAY=($LINE)
+
+       # First array element is the volume/snapshot name.
+       LV=${LINE_ARRAY[0]}
+
+       # Third array element is the attributes.
+       ATTR=${LINE_ARRAY[2]}
+
+       # Fifth character in the attributes is "a" if it's active.
+       ACTIVE=${ATTR:4:1}
+       if [ "$ACTIVE" == "a" ]; then
+         ocf_log info "$LV is already active."
+         continue
+       fi
+
+       SNAPSHOT_ORIGIN=${LINE_ARRAY[4]}
+       if [ "$SNAPSHOT_ORIGIN" != "" ] ; then
+         # If this is a snapshot, don't activate it.
+         continue
+       fi
+
+       ( activate_volume "$*" $VG $LV ) &
+    done <<< "$VOLS"
+}
+
+#
+#    Scan for inactive volumes and log any that are found.
+#
+log_inactive_volumes() {
+    # Get the list of volumes, without the first line which is column headings.
+    VOLS=`lvs $1 |tail -n +2`
+
+    while read -r LINE; do
+        # Convert the line into an array.
+        LINE_ARRAY=($LINE)
+
+        # First array element is the volume/snapshot name.
+        LV=${LINE_ARRAY[0]}
+
+        # Third array element is the attributes.
+        ATTR=${LINE_ARRAY[2]}
+
+        # Fifth character in the attributes is "a" if it's active.
+        ACTIVE=${ATTR:4:1}
+        if [ "$ACTIVE" != "a" ]; then
+            ocf_log err "Volume $LV is not active after expiry of timeout."
+        fi
+    done <<< "$VOLS"
+}
+
+#
 #	Enable LVM volume
 #
 LVM_start() {
@@ -489,20 +564,47 @@ EOF
 		: ;;
 	esac
 
-	if ! ocf_run vgchange $vgchange_options $vg; then
-		if [ $clvmd -eq 0 ]; then
-			return $OCF_ERR_GENERIC
-		fi
-
-		# Failure to exclusively activate cluster vg.:
-		# This could be caused by a remotely active LV, Attempt
-		# to disable volume group cluster wide and try again.
-		# Allow for some settling
-		sleep 5
-		if ! retry_exclusive_start; then
-			return $OCF_ERR_GENERIC
-		fi
-	fi
+  # Kick off activation of all volumes.  If it doesn't complete within
+  # the timeout period, then we'll log the not-yet-activated volumes and
+  # continue on.
+  (ocf_run vgchange $vgchange_options $1) & PID=$!
+
+  # Check every second for up to TIMEOUT seconds whether the vgchange has
+  # completed.
+  TIMEOUT=300
+  TIMED_OUT=true
+  SECONDS=0;
+  PARALLEL_ACTIVATE_DELAY=10
+  PARALLEL_ACTIVATE_DONE=false
+  while [ $SECONDS -lt $TIMEOUT ] ; do
+    kill -0 $PID &> /dev/null
+    if [ $? -eq 1 ] ; then
+      # process with pid of $PID doesn't exist, vgchange command completed
+      TIMED_OUT=false
+      break
+    fi
+    if [ $SECONDS -ge $PARALLEL_ACTIVATE_DELAY ] && \
+       [ "$PARALLEL_ACTIVATE_DONE" != true ] && \
+       [ "$1" == "cinder-volumes" ] ; then
+      # This will kick off parallel activation of all LVs in the VG.
+      # The delay is to ensure the VG is activated first.
+      PARALLEL_ACTIVATE_DONE=true
+      ocf_log info Explicitly activating all volumes in $1 with: $vgchange_options
+      activate_all_volumes $1 $vgchange_options
+    fi
+    sleep 1
+  done
+
+  if [ "$TIMED_OUT" = true ] ; then
+    ocf_log err "Timed out running ocf_run vgchange $vgchange_options $1"
+    log_inactive_volumes $1
+  else
+    # Child process completed, get its status.
+    wait $PID
+    if [ $? -ne 0 ] ; then
+      return $OCF_ERR_GENERIC
+    fi
+  fi
 
 	if LVM_status $vg; then
 		: OK Volume $vg activated just fine!
-- 
1.9.1