added initcontainers for cart and loadbalancer

kubernetes-manifests/cartservice.yaml

@@ -26,6 +26,13 @@ spec:
         app: cartservice
     spec:
       terminationGracePeriodSeconds: 5
+      initContainers:
+      - name: init-db-ready
+        image:  redis:alpine
+        command: ['/bin/sh', '-c']
+        args:
+          - until redis-cli -h redis-cart -p 6379 ping; do echo waiting for redis-cart; sleep 2; done
+          #- for i in {1..100}; do sleep 1; if redis-cli -h redis-cart -p 6379 ping; then exit 0; fi; done; exit 1
       containers:
       - name: server
         image: cartservice

kubernetes-manifests/loadgenerator.yaml

@@ -29,6 +29,10 @@ spec:
     spec:
       terminationGracePeriodSeconds: 5
       restartPolicy: Always
+      initContainers:
+      - name: init-frontend-ready
+        image: busybox:1.28
+        command: ['sh', '-c', 'until  [[ "$(wget --spider -S http://frontend 2>&1 | grep HTTP/)" == "  HTTP/1.1 200 OK" ]]; do echo waiting for frontend; sleep 2; done;']
       containers:
       - name: main
         image: loadgenerator