kubernetes: add liveness probes to deployments

kubernetes/backend-deployment.yaml

@@ -35,6 +35,15 @@ spec:
         volumeMounts:
         - mountPath: /usr/src/app/public/
           name: files
+        livenessProbe:
+          httpGet:
+            path: /api/v1/counts
+            port: 4000
+          initialDelaySeconds: 3
+          periodSeconds: 3
+        ports:
+        - name: http
+          containerPort: 4000
       volumes:
       - name: files
         persistentVolumeClaim:

kubernetes/frontend-deployment.yaml

@@ -22,3 +22,9 @@ spec:
         ports:
         - name: http
           containerPort: 5000
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 5000
+          initialDelaySeconds: 3
+          periodSeconds: 3

kubernetes/nginx-deployment.yaml

@@ -21,10 +21,16 @@ spec:
       - image: nginx:1.17.4-alpine
         name: nginx
         ports:
-        - containerPort: 8080
+        - containerPort: 80
         volumeMounts:
         - mountPath: /etc/nginx/conf.d/
           name: config
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 80
+          initialDelaySeconds: 3
+          periodSeconds: 3
       volumes:
       - name: config
         configMap:

kubernetes/node-deployment.yaml

@@ -52,6 +52,12 @@ spec:
           name: config
         - mountPath: /data
           name: data
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 80
+          initialDelaySeconds: 3
+          periodSeconds: 3
       volumes:
       - name: config
         configMap:

kubernetes/relay-deployment.yaml

@@ -24,3 +24,9 @@ spec:
         ports:
         - name: http
           containerPort: 8088
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 8088
+          initialDelaySeconds: 3
+          periodSeconds: 3