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gke architecture
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‎k8s-manifests/gcp-steps-and-logs

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gcloud auth login
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gcloud config set project weatherappproject-1
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gcloud components install gke-gcloud-auth-plugin
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gcloud container clusters get-credentials weatherapp-cluster-0 --region asia-south1 --project weatherappproject-1
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kubectl get nodes
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kubectl apply -f k8s-manifests/gke-weather-app.yaml
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kubectl get service nginx --namespace gke-weather-app --output jsonpath='{.status.loadBalancer.ingress[0].ip}'
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35.244.50.120
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https://console.cloud.google.com/kubernetes/deployment/asia-south1/weatherapp-cluster-0/gke-weather-app/nginx/overview?invt=Abl6nQ&project=weatherappproject-1
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nginx Load balancer 35.244.50.120:80
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GoDaddy.com > My Products > Domains > Manage DNS for outorin.life
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Name: @ (or www if you want to redirect www.outorin.life)
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Type: A
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Value: 35.244.50.120
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TTL: 1 Hour (or your preferred TTL)

‎k8s-manifests/gke-weather-app.yaml

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apiVersion: v1
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kind: Namespace
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metadata:
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name: gke-weather-app
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: consul-pvc
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namespace: gke-weather-app
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 32Mi
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: redis-pvc
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namespace: gke-weather-app
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 32Mi
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---
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# k8s manifests consul deployment.yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: consul-ssm
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namespace: gke-weather-app
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: consul-ssm
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template:
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metadata:
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labels:
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app: consul-ssm
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spec:
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containers:
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- name: consul
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image: ianunay/weather-app-ssm:v1
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ports:
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- containerPort: 8500
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- containerPort: 8600
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volumeMounts:
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- mountPath: /consul/data
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name: consul-data
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volumes:
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- name: consul-data
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persistentVolumeClaim:
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claimName: consul-pvc
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---
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# k8s manifests consul service.yaml
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apiVersion: v1
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kind: Service
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metadata:
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name: consul-ssm
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namespace: gke-weather-app
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spec:
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type: ClusterIP
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ports:
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- name: http
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port: 8500
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targetPort: 8500
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- name: dns
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port: 8600
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targetPort: 8600
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selector:
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app: consul-ssm
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---
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# k8s manifests redis deployment.yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: redis-cache-weather-prediction
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namespace: gke-weather-app
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: redis-cache-weather-prediction
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template:
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metadata:
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labels:
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app: redis-cache-weather-prediction
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spec:
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containers:
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- name: redis
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image: redis:latest
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ports:
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- containerPort: 6379
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volumeMounts:
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- mountPath: /data
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name: redis-data
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volumes:
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- name: redis-data
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persistentVolumeClaim:
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claimName: redis-pvc
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---
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# k8s manifests redis service.yaml
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apiVersion: v1
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kind: Service
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metadata:
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name: redis-cache-weather-prediction
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namespace: gke-weather-app
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spec:
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type: ClusterIP
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ports:
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- port: 6379
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targetPort: 6379
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selector:
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app: redis-cache-weather-prediction
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: api
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namespace: gke-weather-app
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: api
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template:
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metadata:
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labels:
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app: api
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spec:
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containers:
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- name: api
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image: ianunay/weather-app-api:v6
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ports:
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- containerPort: 8080
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env:
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- name: CONSUL_HTTP_ADDR
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value: "consul-ssm:8500"
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: api
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namespace: gke-weather-app
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spec:
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type: ClusterIP
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ports:
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- port: 8080
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targetPort: 8080
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selector:
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app: api
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---
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# k8s manifests ui deployment.yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: ui
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namespace: gke-weather-app
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: ui
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template:
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metadata:
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labels:
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app: ui
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spec:
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containers:
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- name: ui
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image: ianunay/weather-app-ui:v2
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ports:
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- containerPort: 5001
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---
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# k8s manifests ui service.yaml
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apiVersion: v1
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kind: Service
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metadata:
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name: ui
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namespace: gke-weather-app
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spec:
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type: NodePort
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ports:
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- port: 5001
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targetPort: 5001
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nodePort: 31001
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selector:
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app: ui
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---
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: nginx-config
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namespace: gke-weather-app
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data:
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nginx.conf: |
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events {}
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http {
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log_format custom '$remote_addr - $remote_user [$time_local] "$request" '
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'$status $body_bytes_sent "$http_referer" '
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'"$http_user_agent" "$http_x_forwarded_for" '
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'upstream: $upstream_addr request_time: $request_time upstream_response_time: $upstream_response_time';
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access_log /var/log/nginx/access.log custom;
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error_log /var/log/nginx/error.log;
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server {
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listen 80;
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location /api/ {
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rewrite ^/api/(.*)$ /$1 break;
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proxy_http_version 1.1;
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proxy_cache_bypass $http_upgrade;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection 'upgrade';
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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add_header Accept "application/json";
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proxy_pass http://api:8080;
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}
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location / {
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proxy_http_version 1.1;
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proxy_cache_bypass $http_upgrade;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection 'upgrade';
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_pass http://ui:5001;
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}
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location ~* \.(eot|ttf|woff|woff2)$ {
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add_header Access-Control-Allow-Origin *;
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}
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}
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}
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: nginx
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namespace: gke-weather-app
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: nginx
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template:
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metadata:
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labels:
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app: nginx
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spec:
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containers:
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- name: nginx
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image: ianunay/weather-app-nginx:v4
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ports:
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- containerPort: 80
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volumeMounts:
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- name: nginx-config
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mountPath: /etc/nginx/nginx.conf
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subPath: nginx.conf
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volumes:
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- name: nginx-config
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configMap:
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name: nginx-config
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: nginx
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namespace: gke-weather-app
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spec:
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type: LoadBalancer
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ports:
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- port: 80
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targetPort: 80
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nodePort: 30080
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selector:
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app: nginx
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---
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# kube proxy will not be needed for AWS EKS.
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# In a cloud environment like AWS, a LoadBalancer service is needed to expose the applications.
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# The NodePort service (as used in local development with port-forwarder) should be changed to a LoadBalancer service for AWS EKS.
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# This will allow the service to be accessible via an external load balancer.
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# In AWS, the external load balancer for Kubernetes services is typically an Application Load Balancer (ALB) when you need advanced routing capabilities, such as path-based or host-based routing or http/https routing.
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# If a simpler, high-performance load balancer is needed, a Network Load Balancer (NLB) is ideal use.

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