SDN-C Multi-site High-availability - Auto-failover

Change-Id: I4e028b31ce7a60154d2c04c63431c5ea996de8f8
Signed-off-by: Mohammadreza Pasandideh <mohammadreza.pasandideh@amdocs.com>
Issue-ID: SDNC-213

7 files changed, 91 insertions, 3 deletions

diff --git a/kubernetes/consul/resources/config/consul-agent-config/scripts/sdnc-cluster-health.sh b/kubernetes/consul/resources/config/consul-agent-config/scripts/sdnc-cluster-health.sh
new file mode 100644
index 0000000000..3b186547ce
--- /dev/null
+++ b/kubernetes/consul/resources/config/consul-agent-config/scripts/sdnc-cluster-health.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+# Copyright © 2018 Amdocs
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# query ODL cluster state
+USERNAME="{{.Values.odl.jolokia.username}}"
+PASSWORD="{{.Values.odl.jolokia.password}}"
+
+count=${SDNC_ODL_COUNT:-1}
+siteId=0
+if [ "$SDNC_IS_PRIMARY_CLUSTER" = "false" ];then
+  siteId=1
+fi
+
+for instance in $(seq $count);do
+  shard=member-$(( $siteId*$count + $instance ))-shard-default-config
+  mbean=Category=Shards,name=$shard,type=DistributedConfigDatastore
+  url=http://{{.Release.Name}}-sdnc-$(( $instance-1 )).sdnc-cluster.{{.Release.Namespace}}:8181/jolokia/read/org.opendaylight.controller:$mbean
+
+  response=$( curl -s -u $USERNAME:$PASSWORD $url )
+  rc=$?
+  if [ $rc -ne 0 ];then
+    # failed to contact SDN-C instance - try another
+    echo "Unable to connect to $shard [rc=$?]"
+    continue
+  fi
+
+  status=$( echo "$response" | jq -r ".status" )
+  if [ "$status" != "200" ];then
+    # query failed, try another instance
+    echo "$shard query failed [http-status=$status]"
+    continue
+  fi
+
+  raftState=$( echo "$response" | jq -r ".value.RaftState" )
+  if [ "$raftState" = "Leader" -o "$raftState" = "Follower" ];then
+    # cluster has a leader and is healthy
+    echo "$shard is healthy [RaftState=$raftState]"
+    exit 0
+  else
+    echo "$shard is not healthy [RaftState=$raftState]"
+  fi
+done
+
+# ODL cluster is not healthy
+exit 2
diff --git a/kubernetes/consul/resources/config/consul-agent-config/sdnc-cluster-health.json b/kubernetes/consul/resources/config/consul-agent-config/sdnc-cluster-health.json
new file mode 100644
index 0000000000..86a7630392
--- /dev/null
+++ b/kubernetes/consul/resources/config/consul-agent-config/sdnc-cluster-health.json
@@ -0,0 +1,14 @@
+{
+  "service": {
+    "name": "Health Check: SDNC ODL Cluster",
+    "checks": [
+      {
+        "id": "sdnc-odl-cluster-healthcheck",
+        "name": "SDNC ODL Cluster Health Check",
+        "script": "/consul/scripts/sdnc-cluster-health.sh",
+        "interval": "15s",
+        "timeout": "10s"
+      }
+    ]
+  }
+}
diff --git a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb01-healthcheck.json b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb01-healthcheck.json
index e684c09da8..ed196bd0cf 100644
--- a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb01-healthcheck.json
+++ b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb01-healthcheck.json
@@ -5,7 +5,7 @@
       {
         "id": "sdnctldb01",
         "name": "SDNC SDNCTLDB01 Health Check",
-        "tcp": "sdnc-dbhost:3306",
+        "tcp": "sdnc-sdnctldb01:3306",
         "interval": "10s",
         "timeout": "1s"
       }
diff --git a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb02-healthcheck.json b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb02-healthcheck.json
index ae4820a3e6..b63329f544 100644
--- a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb02-healthcheck.json
+++ b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnctldb02-healthcheck.json
@@ -5,7 +5,7 @@
       {
         "id": "sdnctldb02",
         "name": "SDNC SDNCTLDB02 Health Check",
-        "tcp": "sdnc-dbhost:3306",
+        "tcp": "sdnc-sdnctldb02:3306",
         "interval": "10s",
         "timeout": "1s"
       }
diff --git a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnhost.json b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnhost.json
index 604b5be901..db84164fc7 100644
--- a/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnhost.json
+++ b/kubernetes/consul/resources/config/consul-agent-config/sdnc-sdnhost.json
@@ -5,7 +5,7 @@
       {
         "id": "sdnc-sdnhost",
         "name": "SDNC SDN Host Health Check",
-        "http": "http://sdnhost:8282/apidoc/explorer/index.html",
+        "http": "http://sdnc:8282/apidoc/explorer/index.html",
         "method": "HEAD",
         "header": {
           "Authorization": ["Basic YWRtaW46S3A4Yko0U1hzek0wV1hsaGFrM2VIbGNzZTJnQXc4NHZhb0dHbUp2VXkyVQ=="],
diff --git a/kubernetes/consul/templates/deployment.yaml b/kubernetes/consul/templates/deployment.yaml
index d37521b5e6..2df4d2ac12 100644
--- a/kubernetes/consul/templates/deployment.yaml
+++ b/kubernetes/consul/templates/deployment.yaml
@@ -42,9 +42,15 @@ spec:
         - /bin/sh
         - "-c"
         - |
+          apk update && apk add jq
           cp /tmp/consul/config/* /consul/config
           /usr/local/bin/docker-entrypoint.sh agent -client 0.0.0.0 -enable-script-checks -retry-join {{ .Values.consulServer.nameOverride }}
         name: {{ include "common.name" . }}
+        env:
+          - name: SDNC_ODL_COUNT
+            value: "{{ .Values.sdnc.replicaCount }}"
+          - name: SDNC_IS_PRIMARY_CLUSTER
+            value: "{{ .Values.sdnc.config.isPrimaryCluster }}"
         volumeMounts:
         - mountPath: /tmp/consul/config
           name: consul-agent-config
diff --git a/kubernetes/consul/values.yaml b/kubernetes/consul/values.yaml
index abfc9ef0ef..37e74f38d5 100644
--- a/kubernetes/consul/values.yaml
+++ b/kubernetes/consul/values.yaml
@@ -61,3 +61,13 @@ ingress:
   enabled: false
 
 resources: {}
+
+odl:
+  jolokia:
+    username: admin
+    password: admin
+
+sdnc:
+  config:
+    isPrimaryCluster: true
+  replicaCount: 1