##Php Redis Application on Kubernetes

Sample Application that shows how to run Php and Redis Application on kubernetes cluster locally using minikube or on Google Cloud using GKE

Run the application

to run the application you need docker and kubectl installed in your system, a minikube cluster locally or a GKE cluster

git clone git@github.com:ilyash00/kubernetes-php.git

In minikube

To run in minikube cluster start minikube set your local docker client to use minikube docker daemon using eval $(minikube docker-env)

Build docker images using

docker build -t redis-local -f Dockerfile-redis .

docker build -t php-apache-gke -f Dockerfile-php .

Deploy your Deployment and Services using

kubectl apply -f redis.yaml

kubectl apply -f php-apache.yaml

Make sure they are running using kubectl get pods and kubectl get services

Find your service url using

minikube service php-apache --url

Check your application using curl

curl $(minikube service php-apache --url)

To check redis

curl $(minikube service php-apache --url)/redis.php

In Cloud GKE

Connect your kubectl client to your cluster using

gcloud container clusters get-credentials CLUSTER_NAME --zone CLUSTER_ZONE --project PROJECT_ID

Build your Docker images and push it to any container registry

docker build -t php-apache-gke:latest -f Dockerfile-php .

docker tag IMAGE_ID DOCKER_HUB_USERNAME/php-apache-gke:latest

docker push DOCKER_HUB_USERNAME/php-apache-gke:latest

docker build -t redis-local:latest -f Dockerfile-redis .

docker tag IMAGE_ID DOCKER_HUB_USERNAME/redis-local:latest

docker push DOCKER_HUB_USERNAME/redis-local:latest

Now we have pushed our image to dockerhub, you can use any other container registry like google cloud container registry.

Create a configmap in your cluster to store your insatance connection details using

kubectl create configmap redishost --from-literal=REDIS_HOST=redis --from-literal=REDIS_PORT=6379

One final change before deployment, Change image in php-apache.yaml and redis.yaml to the image you push to the registry, remove line imagePullPolicy: Never and change Service type for php-apache from NodePort to LoadBalancer

Now you can Deploy your deployment and Service using

kubectl apply -f php-apache.yaml

kubectl apply -f redis.yaml

To test Deployment use kubectl get pods it will show your pod running

To access your application using the LoadBalancer run kubectl get services it will give EXTERNAL-IP adderess of you service then you will be able to access your application at that IP_ADDRESS and to test redis connection go to IP_ADDRESS/redis.php.

Cloud Memorystore

If you want to use Cloud Memorystore instead of redis container don't deploy redis.yaml, instead create a cloud memorystore instance in the same region where your cluster is and change your REDIS_HOST in configmap

kubectl create configmap redishost --from-literal=REDIS_HOST=REDIS_INSTACE_IP --from-literal=REDIS_PORT=6379

For this to work your cluster must has IP_ALIAS enable, and, cluster and instance must be in the same region.