From 88bbab963f11a71aae2f7cff224ce0f5038111a8 Mon Sep 17 00:00:00 2001
From: Pingfan Liu <piliu@redhat.com>
Date: Thu, 1 Aug 2019 10:34:05 +0800
Subject: [PATCH] dracut-module-setup.sh: skip alias of localhost in
 get_pcs_fence_kdump_nodes()

The current code only exclude the hostname, while localhost can have alias in
/etc/hosts. All of the alias should be excluded from the fence dump node to
avoid deadlock issue.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
---
 dracut-module-setup.sh | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index 27b9f02..9ef6021 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -689,6 +689,21 @@ kdump_check_iscsi_targets () {
     }
 }
 
+is_localhost() {
+    local hostnames=$(hostname -A)
+    local shortnames=$(hostname -A -s)
+    local nodename=$1
+
+    hostnames="$hostnames $shortnames"
+
+    for name in ${hostnames}; do
+        if [ "$name" == "$nodename" ]; then
+            return 0
+        fi
+    done
+    return 1
+}
+
 # retrieves fence_kdump nodes from Pacemaker cluster configuration
 get_pcs_fence_kdump_nodes() {
     local nodes
@@ -703,7 +718,7 @@ get_pcs_fence_kdump_nodes() {
         eval $node
         nodename=$uname
         # Skip its own node name
-        if [ "$nodename" = `hostname` -o "$nodename" = `hostname -s` ]; then
+        if is_localhost $nodename; then
             continue
         fi
         nodes="$nodes $nodename"