Add support for checking more daemons

This patch is changing the way how keepalived
checks daemons liveness.

Check_alive.sh will find checks for daemons
which are copied by kolla-ansible and return 0/1
if alive/down.

This patch is required for proxysql HA.

Needed-By: https://review.opendev.org/c/openstack/kolla-ansible/+/770215

Change-Id: I68836918466beb572e42ffedce127747290ad481

1 files changed, 34 insertions, 2 deletions

diff --git a/docker/keepalived/check_alive.sh b/docker/keepalived/check_alive.sh
index 929bb221a..060884c7c 100644
--- a/docker/keepalived/check_alive.sh
+++ b/docker/keepalived/check_alive.sh
@@ -1,6 +1,38 @@
 #!/bin/bash
 
-# This will return 0 when it successfully talks to the haproxy daemon via the socket
+# This will return 0 when it successfully passes all checks for all daemons
 # Failures return 1
 
-echo "show info" | socat unix-connect:/var/lib/kolla/haproxy/haproxy.sock stdio > /dev/null
+declare -A check_results
+final_result=0
+
+if [ -d "/checks" ]; then
+    CHECKS=$(find /checks -type f)
+fi
+
+if [ "${CHECKS}" ]; then
+    # Store results
+    for check in ${CHECKS}; do
+        # Run check but do not print stderr
+        # as single check can be executed manually to see the result
+        ${check} 2>/dev/null
+        check_results[${check}]=$?
+    done
+
+    # Print results and save the final result
+    for i in "${!check_results[@]}"; do
+        if [ "${check_results[$i]}" == "0" ]; then
+            echo "Keepalived check script ${i} succeeded."
+        else
+            final_result=1
+            echo "Keepalived check script ${i} failed."
+        fi
+    done
+
+    exit ${final_result}
+else
+    # Legacy single check of haproxy liveness
+    # TODO(kevko): This can be removed after k-a part merges
+    # https://review.opendev.org/c/openstack/kolla-ansible/+/770215
+    echo "show info" | socat unix-connect:/var/lib/kolla/haproxy/haproxy.sock stdio > /dev/null
+fi