Deploy multiple version dynamically with nginx ingress controller and Helm

Very simple python Flask application that has 2 deployment environments:

• dev - deploy only one version that always overwrites the already installed one
• prod - manage multiple versions

Set your configuration

Set values in helm-chart/dummy-app/values-dev.yaml and helm-chart/dummy-app/values-prod.yaml:

• DEV-REGISTRY/PROD-REGISTRY - your registries urls
• DEV-CLUSTER-DNS-NAME/PROD-CLUSTER-DNS-NAME - your clusters DNS names

Define DNS name for your cluster with external IP that will be used for nginx controler

Build

Set environment variables:

• BUILD_NUMBER, the default is 1
• REGISTRY_URL, the default is empty Run build.sh to build and push docker images (Make sure you are logged in to your registry)

export BUILD_NUMBER=4
export REGISTRY_URL=myreg/
./build.sh

Deployment

Install nginx controller

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo add stable https://kubernetes-charts.storage.googleapis.com/
helm repo update

helm upgrade --install ingress-nginx ingress-nginx/ingress-nginx --set rbac.create=true --set controller.service.loadBalancerIP="<your external IP>" --set controller.service.ports.http="<your port>"

Deploy to dev

Replace VERSION_NAME in helm-chart/dummy-app/values-dev.yaml with your full version name (like 1.0.4) Run:

cd helm-chart
helm upgrade --install --cleanup-on-fail  -f dummy-app/values-dev.yaml dummy-app ./dummy-app

Call your service:

http://<dev cluster DNS name>:5000

like

http://mydevserver:5000

Deploy to prod

Replace VERSION_NAME in helm-chart/dummy-app/values-prod.yaml with your full version name (like 1.0.4) Run:

cd helm-chart
helm upgrade --install --cleanup-on-fail  -f dummy-app/values-dev.yaml dummy-app-<version> ./dummy-app

like

cd helm-chart
helm upgrade --install --cleanup-on-fail  -f dummy-app/values-dev.yaml dummy-app-1.0.4 ./dummy-app

Call your service:

http://<dev cluster DNS name>:5000/v<version>

like:

http://myprodserver:5000/v1.0.4