create secrets

#!/bin/bash

REL_PATH=$(dirname $0)
cd $REL_PATH

env=$1
CONFIG=$(cat container-config/env-$env.sh | base64)

# delete the old config
sed -e "s/{{config_data}}/''/g" container-config/config-template.yaml | kubectl delete -f -
# create new one
sed -e "s/{{config_data}}/${CONFIG}/g" container-config/config-template.yaml | kubectl create -f -

#create service & replication controller
kubectl create -f kubectl-config-$env.yaml

kubectl-config.yaml

apiVersion: v1
kind: Service
metadata:
  name: balkan
  labels:
    name: balkan
spec:
  type: LoadBalancer
  loadBalancerIP: 0.0.0.0
  
  # static IP allocated in the Google Cloud
  ports:
    - name: http
      port: 80 #порт на котором будет слушать сервис
      targetPort: 8000 #порт контейнера на который будет производиться трансляция запросов
      protocol: TCP
  selector:
    name: balkan # поле должно совпадать с аналогичным в конфиге ReplicationController
---
apiVersion: v1
kind: ReplicationController
metadata:
  labels:
    name: balkan
  name: balkan #controller
spec:
  replicas: 2
  selector:
    name: balkan
  template:
    metadata:
      labels:
        name: balkan
    spec:
      containers:
      - image: eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v3 # format just for example!
        name: balkan
        command: [ "/bin/bash", "-c"]
        args: ["source /etc/configs; cd folder; node server.js"]
        ports:
        - containerPort: 8000
        volumeMounts:
          - name: secret-name
            mountPath: /etc/configs
            readOnly: true
      volumes:
        - name: secret-name
          secret:
            secretName: secret-name

scripts_manual_update.sh

export PROJECT=balkan
export PROJECT_ID=balkan-id (get ID on page) ??
export CLUSTER_NAME=bon
export CONTAINER_NAME=balkan-container

gcloud config set compute/region europe-west1
gcloud config set compute/zone europe-west1-b
gcloud config set project $PROJECT
gcloud config set container/cluster $CLUSTER_NAME
gcloud config list

# with CPU=1 rolling-update failed 
gcloud container clusters create $CLUSTER_NAME --num-nodes 1 --machine-type n1-standard-2 

#with manual versioning
docker build -t eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v2 . ; gcloud docker push eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v2

kubectl create -f kubectl-config.yaml

#to push new image: 
docker build -t eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v3 . ; gcloud docker push eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v3

#switch to new version: balkan is controller name from kuberctl-config.yaml
kubectl rolling-update balkan --image=eu.gcr.io/${PROJECT_ID}/${CONTAINER_NAME}:v3

#to check everything is fine:
kubectl describe pods

kubectl get services # get actual external ip, check with request
kubectl get rc # get image version

secret-template

apiVersion: v1
kind: Secret
metadata:
  name: balkan-config
type: Opaque
data:
  config: {{config_data}}