fix(deploy): force server out of maintenance after HAProxy SIGHUP reload

deploy/ansible/roles/app/tasks/main.yml

@@ -217,12 +217,21 @@
         docker kill -s HUP rustyip-haproxy
       changed_when: true
 
+    - name: Force new backend out of maintenance via stats admin
+      ansible.builtin.shell: |
+        sleep 1
+        docker exec rustyip-haproxy wget -qO- \
+          --post-data='s=app/{{ deploy_target }}&action=ready' \
+          "http://127.0.0.1:9000/stats" 2>/dev/null
+      changed_when: true
+
     - name: Wait for new backend to be UP in HAProxy
       ansible.builtin.shell: |
         for i in $(seq 1 30); do
           csv=$(docker exec rustyip-haproxy wget -qO- \
             "http://127.0.0.1:9000/stats;csv;norefresh" 2>/dev/null)
           status=$(echo "$csv" | awk -F, '$1 == "app" && $2 == "{{ deploy_target }}" {print $18}')
+          echo "poll $i: status=$status"
           if [ "$status" = "UP" ]; then
             echo "backend {{ deploy_target }} is UP in HAProxy"
             exit 0
@@ -230,6 +239,9 @@
           sleep 2
         done
         echo "timeout waiting for backend {{ deploy_target }} to become UP"
+        echo "final csv output:"
+        docker exec rustyip-haproxy wget -qO- \
+          "http://127.0.0.1:9000/stats;csv;norefresh" 2>/dev/null || true
         exit 1
       changed_when: false
 
@@ -270,6 +282,15 @@
       changed_when: true
       failed_when: false
 
+    - name: Force original backend out of maintenance via stats admin
+      ansible.builtin.shell: |
+        sleep 1
+        docker exec rustyip-haproxy wget -qO- \
+          --post-data='s=app/{{ current_active }}&action=ready' \
+          "http://127.0.0.1:9000/stats" 2>/dev/null
+      changed_when: true
+      failed_when: false
+
     - name: Fail with deployment error
       ansible.builtin.fail:
         msg: >-

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

@@ -137,6 +137,7 @@ frontend stats_internal
     stats enable
     stats uri /stats
     stats refresh 2s
+    stats admin if TRUE
 
 resolvers docker_dns
     nameserver dns1 127.0.0.11:53
@@ -144,7 +145,7 @@ resolvers docker_dns
     timeout resolve 1s
     timeout retry 1s
     hold valid 10s
-    hold nx 30s
+    hold nx 5s
     hold obsolete 30s
 
 backend app