From 546d7ae4a7092c9625804fe53cdea8d12da0dace Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Czern=C3=BD?= <pczerny@opennebula.io>
Date: Tue, 6 Feb 2024 11:18:35 +0100
Subject: [PATCH] B #6372: Add lock to raft hook script (#2899)

* This should fix issues in HA environment, where we sometimes get duplicated virtual IPs

(cherry picked from commit 5788a2528eb30bb576950b403c306557d001fd5e)
(cherry picked from commit bf628dc9b64f60cde65fbf8032073ec10de76362)
---
 share/hooks/raft/vip.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/share/hooks/raft/vip.sh b/share/hooks/raft/vip.sh
index ff67669c83..d94844ec52 100755
--- a/share/hooks/raft/vip.sh
+++ b/share/hooks/raft/vip.sh
@@ -86,9 +86,21 @@ function virtualip() {
 # main
 #
 
+if [ -z "${ONE_LOCATION}" ]; then
+    LOCK_LOCATION=/var/lock/one
+else
+    LOCK_LOCATION=$ONE_LOCATION/var/lock
+fi
+
+LOCK_FILE="$LOCK_LOCATION/vip_sh"
+
 ACTION="$1"
 shift
 
+# Start of critical section (opens LOCK_FILE with fd 56)
+exec 56>$LOCK_FILE
+flock -w 60 56
+
 # Process all parameters in the form of interface:IP
 while [[ $# -gt 0 ]]
 do