script autocluster vernemq

Dockerfile

@@ -10,7 +10,7 @@ RUN apt-get update && apt-get install -y \
     jq \
     && rm -rf /var/lib/apt/lists/*
 
-ENV VERNEMQ_VERSION 1.3.1
+ENV VERNEMQ_VERSION 1.5.0
 
 # Defaults
 ENV DOCKER_VERNEMQ_KUBERNETES_NAMESPACE default

bin/vernemq.sh

@@ -17,35 +17,36 @@ if env | grep -q "DOCKER_VERNEMQ_DISCOVERY_NODE"; then
     echo "-eval \"vmq_server_cmd:node_join('VerneMQ@${DOCKER_VERNEMQ_DISCOVERY_NODE}')\"" >> /etc/vernemq/vm.args
 fi
 
-# If you encounter "SSL certification error (subject name does not match the host name)", you may try to set DOCKER_VERNEMQ_KUBERNETES_INSECURE to "1".
-insecure=""
-if env | grep -q "DOCKER_VERNEMQ_KUBERNETES_INSECURE"; then
-    insecure="--insecure"
-fi
-
-if env | grep -q "DOCKER_VERNEMQ_DISCOVERY_KUBERNETES"; then
-    # Let's set our nodename correctly
-    VERNEMQ_KUBERNETES_SUBDOMAIN=$(curl -X GET $insecure --cacert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt https://kubernetes.default.svc.cluster.local/api/v1/namespaces/$DOCKER_VERNEMQ_KUBERNETES_NAMESPACE/pods?labelSelector=app=$DOCKER_VERNEMQ_KUBERNETES_APP_LABEL -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" | jq '.items[0].spec.subdomain' | sed 's/"//g' | tr '\n' '\0')
-    VERNEMQ_KUBERNETES_HOSTNAME=${MY_POD_NAME}.${VERNEMQ_KUBERNETES_SUBDOMAIN}.${DOCKER_VERNEMQ_KUBERNETES_NAMESPACE}.svc.cluster.local
-
-    sed -i.bak -r "s/VerneMQ@.+/VerneMQ@${VERNEMQ_KUBERNETES_HOSTNAME}/" /etc/vernemq/vm.args
-    # Hack into K8S DNS resolution (temporarily)
-    kube_pod_names=$(curl -X GET $insecure --cacert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt https://kubernetes.default.svc.cluster.local/api/v1/namespaces/$DOCKER_VERNEMQ_KUBERNETES_NAMESPACE/pods?labelSelector=app=$DOCKER_VERNEMQ_KUBERNETES_APP_LABEL -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" | jq '.items[].spec.hostname' | sed 's/"//g' | tr '\n' ' ')
-    for kube_pod_name in $kube_pod_names;
+# Cluster discovery implementation based on https://github.com/thesandlord/kubernetes-pod-ip-finder
+if env | grep -q "KUBE_VERNEMQ_DISCOVERY_URL"; then
+    response=$(curl ${KUBE_VERNEMQ_DISCOVERY_URL})
+    IFS=','
+    nodes=($(echo "$response" | tr -d '[]"'))
+    length=$(echo ${#nodes[@]})
+    for i in "${nodes[@]}"
     do
-        if [ $kube_pod_name == "null" ]
-            then
-                echo "Kubernetes discovery selected, but no pods found. Maybe we're the first?"
-                echo "Anyway, we won't attempt to join any cluster."
-                break
-        fi
-        if [ $kube_pod_name != $MY_POD_NAME ]
-            then
-                echo "Will join an existing Kubernetes cluster with discovery node at ${kube_pod_name}.${VERNEMQ_KUBERNETES_SUBDOMAIN}.${DOCKER_VERNEMQ_KUBERNETES_NAMESPACE}.svc.cluster.local"
-                echo "-eval \"vmq_server_cmd:node_join('VerneMQ@${kube_pod_name}.${VERNEMQ_KUBERNETES_SUBDOMAIN}.${DOCKER_VERNEMQ_KUBERNETES_NAMESPACE}.svc.cluster.local')\"" >> /etc/vernemq/vm.args
-                break
+      if [ "$i" != "null" ] && [ "$i" != "$IP_ADDRESS" ] && (($length > 1)); then
+        echo "Start Joining to VerneMQ@${i}."
+        echo "-eval \"vmq_server_cmd:node_join('VerneMQ@${i}')\"" >> /etc/vernemq/vm.args
       fi
     done
+    IFS=''
+fi
+
+if env | grep -q "DOCKER_VERNEMQ_ALLOW_ANONYMOUS=on"; then
+    echo "allow_anonymous = on" >> /etc/vernemq/vernemq.conf
+fi
+
+if env | grep -q "DOCKER_VERNEMQ_TRADE_CONSISTENCY=on"; then
+    echo "trade_consistency = on" >> /etc/vernemq/vernemq.conf
+fi
+
+if env | grep -q "DOCKER_VERNEMQ_ALLOW_MULTIPLE_SESSIONS=on"; then
+    echo "allow_multiple_sessions = on" >> /etc/vernemq/vernemq.conf
+fi
+
+if env | grep -q "DOCKER_VERNEMQ_MAX_CLIENT_ID_SIZE"; then
+    echo "max_client_id_size = ${DOCKER_VERNEMQ_MAX_CLIENT_ID_SIZE}" >> /etc/vernemq/vernemq.conf
 fi
 
 if [ -f /etc/vernemq/vernemq.conf.local ]; then
@@ -121,3 +122,4 @@ while true
 do
     tail -f /var/log/vernemq/console.log & wait ${!}
 done
+