Feature/k8s rolling update (#33)

* chore: k8s rolling update deployment

* chore: change param name

* docs: README for k8s rolling update

* docs: fix typo

* chore: add namespace, add loadbalancer

* docs: update doc for k8s deployment and service

* feat: crontab per 20 minutes

* fix: sed on linux

docker-orchestration/README.md

@@ -14,3 +14,7 @@ Image contains web tool to check routing and guidance result.
 It uses MapBox GL JS and apply routing response on top of Mapbox vector tiles.  
 See details in [osrm-frontend-docker](./osrm-frontend-docker/README.md)
 
+## Kubernetes Deployment
+### k8s-rolling-update
+Use kubernetes rolling update deployment strategy for timed replace container with new one. Latest traffic will be used during container startup.  
+See details in [k8s rolling update](./k8s-rolling-update/)

docker-orchestration/k8s-rolling-update/README.md

@@ -0,0 +1,48 @@
+# Kubernetes Rolling Update Deployment
+Use kubernetes rolling update deployment strategy for timed replace container with new one. Latest traffic will be used during container startup.  
+
+## Usage
+```bash
+
+# NOTE: prepare your image and fill into osrm.yaml
+$ sed -i "s#TELENAV_OSRM_BACKEND_DOCKER_IMAGE#<your image>#g" ./osrm.yaml
+
+# create deployment
+$ kubectl create -f osrm.yaml  
+deployment.extensions/osrm created
+
+# create loadbalancer
+$ kubectl create -f osrm_svc.yaml  
+service/routing-osrm-service created
+
+# OPTIONAL: checking deployment status, wait READY
+$ kubectl get deployments -n routing-osrm
+NAME   READY   UP-TO-DATE   AVAILABLE   AGE
+osrm   0/1     1            0           20s
+$ kubectl get pods -n routing-osrm
+NAME                    READY   STATUS    RESTARTS   AGE
+osrm-67b55f46c9-tpfgs   0/1     Running   0          22s
+
+# OPTIONAL: check deployment details for troubleshooting
+$ kubectl describe deployments -n routing-osrm
+...
+$ kubectl describe pods -n routing-osrm
+...
+
+# OPTIONAL: check container running log for troubleshooting
+$ kubectl logs -f --timestamps=true  -n routing-osrm osrm-67b55f46c9-tpfgs
+...
+
+# start timed rolling update for traffic updating
+$ crontab osrm_cron
+$ crontab -l 
+*/30 * * * * export PATH=$HOME/bin:$PATH && kubectl set env --env="LAST_MANUAL_RESTART=$(date -u +\%Y\%m\%dT\%H\%M\%S)" deploy/osrm -n routing-osrm >> ${HOME}/osrm_cron.log 2>&1
+
+# OPTIONAL: if want to stop
+$ crontab -r 
+$ kubectl delete deployment osrm -n routing-osrm
+deployment.extensions "osrm" deleted
+$ kubectl delete routing-osrm-service -n routing-osrm
+service "routing-osrm-service" deleted
+
+```

docker-orchestration/k8s-rolling-update/osrm.yaml

@@ -0,0 +1,33 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: osrm
+  namespace: routing-osrm
+spec:
+  replicas: 1
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 0
+  template:
+    metadata:
+      labels:
+        app: routing
+    spec:
+      nodeSelector:
+        routing-osrm/role: routing-osrm
+      containers:
+        - name: osrm-backend
+          image: TELENAV_OSRM_BACKEND_DOCKER_IMAGE
+          imagePullPolicy: IfNotPresent
+          args: ["routed_startup"]
+          ports:
+          - containerPort: 5000
+            protocol: TCP 
+          readinessProbe:
+            tcpSocket:
+              port: 5000
+            initialDelaySeconds: 10
+            periodSeconds: 5
+            failureThreshold: 1000

docker-orchestration/k8s-rolling-update/osrm_cron

@@ -0,0 +1 @@
+*/20 * * * * export PATH=$HOME/bin:$PATH && kubectl set env --env="LAST_MANUAL_RESTART=$(date -u +\%Y\%m\%dT\%H\%M\%S)" deploy/osrm -n routing-osrm >> ${HOME}/osrm_cron.log 2>&1

docker-orchestration/k8s-rolling-update/osrm_svc.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: routing-osrm-service
+  namespace: routing-osrm
+  annotations:
+    service.beta.kubernetes.io/aws-load-balancer-internal: 0.0.0.0/0
+spec:
+  selector:
+    app: routing
+  ports:
+  - port: 5001
+    protocol: TCP
+    targetPort: 5000
+  type: LoadBalancer