Reading from Docker and Swarm

assets/scripts/haproxy-reload.sh

@@ -1,5 +1,48 @@
 #!/usr/bin/env bash
 
-echo "Reloading..."
+cd /scripts
 
-/usr/local/sbin/haproxy -W -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -x /var/run/haproxy.sock -sf $(cat /run/haproxy.pid) &
+RELOAD="true"
+
+if [[ "$DISCOVER" == "static" ]]; then
+    CONTROL_FILE="/etc/haproxy/haproxy.cfg"
+    cp ${CONTROL_FILE} ${CONTROL_FILE}.old
+    python3 static.py /etc/haproxy/easyconfig.yml > ${CONTROL_FILE}
+else
+    CONTROL_FILE="/tmp/.docker_data"
+    touch ${CONTROL_FILE}
+    mv ${CONTROL_FILE} ${CONTROL_FILE}.old
+    touch ${CONTROL_FILE}
+
+    if [[ "$DISCOVER" == "docker" ]]; then
+        CONTAINERS=$(docker ps -q)
+        LABEL_PATH=".Config.Labels"
+    else
+        CONTAINERS=$(docker node ps $(docker node ls -q) --format "{{ .Name }}" --filter desired-state=running | cut -d. -f1 | sort | uniq)
+        LABEL_PATH=".Spec.Labels"
+    fi
+
+    for container in ${CONTAINERS}; do
+        docker inspect --format "{{ json $LABEL_PATH }}" ${container} | xargs -I % echo ${container}=% >> ${CONTROL_FILE}
+    done
+
+    if cmp -s ${CONTROL_FILE} ${CONTROL_FILE}.old ; then
+        RELOAD="false"
+    else
+        python3 swarm.py > /etc/haproxy/haproxy.cfg
+    fi
+fi
+
+if cmp -s ${CONTROL_FILE} ${CONTROL_FILE}.old ; then
+    RELOAD="false"
+fi
+
+if [[ ! -z "$1" ]]; then
+    echo "Initial configuration"
+    RELOAD="false"
+fi
+
+if [[ "$RELOAD" == "true" ]]; then
+    echo "Reloading..."
+    /usr/local/sbin/haproxy -W -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid -x /var/run/haproxy.sock -sf $(cat /run/haproxy.pid) &
+fi