Merge "Add check_script for haproxy in keepalived"

ansible/roles/haproxy/tasks/start.yml

@@ -6,6 +6,7 @@
     container_privileged: "True"
     container_volumes:
       - "{{ node_config_directory }}/keepalived/:/opt/kolla/keepalived/:ro"
+      - "/run:/run"
     container_environment:
       KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
 
@@ -15,6 +16,7 @@
     container_name: "haproxy"
     container_volumes:
       - "{{ node_config_directory }}/haproxy/:/opt/kolla/haproxy/:ro"
+      - "/run:/run"
     container_environment:
       KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
 

ansible/roles/haproxy/templates/haproxy.cfg.j2

 global
   daemon
   maxconn 4000
+  stats socket /run/haproxy.sock
 
 defaults
   mode http
-  maxconn 4000
   option redispatch
   retries 3
   timeout http-request 10s

ansible/roles/haproxy/templates/keepalived.conf.j2

 vrrp_script check_alive {
     script "/check_alive.sh"
     interval 2
-    weight -10
+    fall 2
+    rise 10
 }
 
 vrrp_instance Floating {

docker/common/keepalived/check_alive.sh

 #!/bin/bash
 
-# This is noop check script. Change it to something meaningful.
-# TODO (inc0): When HAProxy is implemented, this should be changed to HAProxy check
-# https://github.com/stackforge/kolla/blob/master/specs/high-availability.rst
+# This will return 0 when it successfully talks to the haproxy daemon via the socket
+# Failures return 1
 
-exit 0
+echo "show info" | socat unix-connect:/run/haproxy.sock stdio