DevOpsCorner Helm Chart

Helm chart for devopscorner services (Semantic Version)

---

Prerequirements

• Helm

  ### Linux ###
  $ curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
  $ chmod 700 get_helm.sh
  $ ./get_helm.sh
  
  ### MacOS ###
  $ brew install helm
  

• Helmfile

  wget https://github.com/roboll/helmfile/releases/download/v0.139.7/helmfile_linux_amd64
  chmod +x helmfile_linux_amd64
  sudo mv helmfile_linux_amd64 /usr/local/bin/helmfile
  

• Helm Plugins

  helm plugin install https://github.com/databus23/helm-diff
  helm plugin install https://github.com/hypnoglow/helm-s3.git
  

• Added Mandatory Repository

  helm repo add stable https://charts.helm.sh/stable
  helm repo update
  

Helm Repository

• Check Repository Helm

  helm repo list
  ----
  NAME            URL
  stable          https://charts.helm.sh/stable
  

• Adding Repository Helm

  ### LAB ###
  helm s3 init s3://devopscorner-helm-chart/lab
  AWS_REGION=ap-southeast-1 helm repo add devopscorner-lab s3://devopscorner-helm-chart/lab
  
  ### STAGING ###
  helm s3 init s3://devopscorner-helm-chart/staging
  AWS_REGION=ap-southeast-1 helm repo add devopscorner-staging s3://devopscorner-helm-chart/staging
  
  ### PRODUCTION ###
  helm s3 init s3://devopscorner-helm-chart/prod
  AWS_REGION=ap-southeast-1 helm repo add devopscorner s3://devopscorner-helm-chart/prod
  
  helm repo update
  

Testing Helm

• Testing the chart template

  helm template ./api -f api/values.yaml
  helm template ./backend -f backend/values.yaml
  helm template ./frontend -f frontend/values.yaml
  helm template ./svcrole -f svcrole/values.yaml
  

Create Helm Template

• Create a zip package of helm chart

  helm package api
  helm package backend
  helm package frontend
  helm package svcrole
  

Update Helm Template

• Push chart into private repository

  ### LAB ###
  helm s3 push api-[version].tgz devopscorner-lab --force
  helm s3 push backend-[version].tgz devopscorner-lab --force
  helm s3 push frontend-[version].tgz devopscorner-lab --force
  helm s3 push svcrole-[version].tgz devopscorner-lab --force
  
  ### STAGING ###
  helm s3 push api-[version].tgz devopscorner-staging --force
  helm s3 push backend-[version].tgz devopscorner-staging --force
  helm s3 push frontend-[version].tgz devopscorner-staging --force
  helm s3 push svcrole-[version].tgz devopscorner-staging --force
  ---
  ### PRODUCTION ###
  helm s3 push api-[version].tgz devopscorner --force
  helm s3 push backend-[version].tgz devopscorner --force
  helm s3 push frontend-[version].tgz devopscorner --force
  helm s3 push svcrole-[version].tgz devopscorner --force
  

Changing Version Helm

• Update version value in Chart Template Chart.yaml

  apiVersion: v1
  name: api
  description: A Helm chart for Kubernetes
  
  # A chart can be either an 'application' or a 'library' chart.
  #
  # Application charts are a collection of templates that can be packaged into versioned archives
  # to be deployed.
  #
  # Library charts provide useful utilities or functions for the chart developer. They're included as
  # a dependency of application charts to inject those utilities and functions into the rendering
  # pipeline. Library charts do not define any templates and therefore cannot be deployed.
  type: application
  
  # This is the chart version. This version number should be incremented each time you make changes
  # to the chart and its templates, including the app version.
  # Versions are expected to follow Semantic Versioning (https://semver.org/)
  version: 0.3.0     ### Change HERE
  
  # This is the version number of the application being deployed. This version number should be
  # incremented each time you make changes to the application. Versions are not expected to
  # follow Semantic Versioning. They should reflect the version the application is using.
  # It is recommended to use it with quotes.
  appVersion: "1.16.0"
  

HELM Template Structure

lab
├── api
│   ├── Chart.yaml
│   ├── api.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   ├── clusterrole.yaml
│   │   ├── configmap.yaml
│   │   ├── deployment.yaml
│   │   ├── hpa.yaml
│   │   ├── ingress.yaml
│   │   ├── secret.yaml
│   │   ├── service.yaml
│   │   └── serviceaccount.yaml
│   └── values.yaml
├── backend
│   ├── Chart.yaml
│   ├── backend.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   ├── clusterrole.yaml
│   │   ├── configmap.yaml
│   │   ├── deployment.yaml
│   │   ├── hpa.yaml
│   │   ├── ingress.yaml
│   │   ├── secret.yaml
│   │   ├── service.yaml
│   │   └── serviceaccount.yaml
│   └── values.yaml
├── configmap
│   ├── Chart.yaml
│   ├── configmap.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   └── configmap.yaml
│   └── values.yaml
├── frontend
│   ├── Chart.yaml
│   ├── frontend.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   ├── clusterrole.yaml
│   │   ├── configmap.yaml
│   │   ├── deployment.yaml
│   │   ├── hpa.yaml
│   │   ├── ingress.yaml
│   │   ├── secret.yaml
│   │   ├── service.yaml
│   │   └── serviceaccount.yaml
│   └── values.yaml
├── helm-pack-lab.sh
├── helm-push-lab.sh
├── secretref
│   ├── Chart.yaml
│   ├── secretref.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   └── secret.yaml
│   └── values.yaml
...
...
├── stateful
│   ├── Chart.yaml
│   ├── stateful.yaml
│   ├── templates
│   │   ├── _helpers.tpl
│   │   ├── clusterrole.yaml
│   │   ├── configmap.yaml
│   │   ├── deployment.yaml
│   │   ├── hpa.yaml
│   │   ├── ingress.yaml
│   │   ├── pv.yaml
│   │   ├── pvc.yaml
│   │   ├── secret.yaml
│   │   ├── service.yaml
│   │   └── serviceaccount.yaml
│   └── values.yaml
└── svcrole
    ├── Chart.yaml
    ├── templates
    │   ├── _helpers.tpl
    │   ├── clusterrole.yaml
    │   ├── rolebinding.yaml
    │   └── serviceaccount.yaml
    └── values.yaml

26 directories, 140 files

Service HELM Template

• Structure on services repo

_infra/
   dev/
      helmfile.yaml
      values/
            api/values.yaml
            backend/values.yaml
            frontend/values.yaml
            svcrole/values.yaml

ECR Deployment

• ECR Login

  aws ecr get-login-password --region [AWS_REGION] | docker login --username AWS --password-stdin [ERC_PATH]
  ---
  aws ecr get-login-password --region ap-southeast-1 | docker login --username AWS --password-stdin [AWS_ACCOUNT].dkr.ecr.ap-southeast-1.amazonaws.com
  

• ECR Build

  docker build [DOCKERFILE_PATH] -t [DOCKER_IMAGE_NAME]:[TAG]
  ---
  docker build . -t zeroc0d3/laravel-kubernetes:latest
  docker build /home/ubuntu/Dockerfile -t zeroc0d3/laravel-kubernetes:latest
  

• ECR Push

  docker tag [DOCKER_IMAGE_NAME]:[TAG] [ECR_PATH]/[DOCKER_IMAGE_NAME]:[TAG]
  docker push [ECR_PATH]/[DOCKER_IMAGE_NAME]:[TAG]
  ---
  docker tag devopscorner/laravel-kubernetes:latest [AWS_ACCOUNT].dkr.ecr.ap-southeast-1.amazonaws.com/devopscorner/laravel-kubernetes:latest
  docker push [AWS_ACCOUNT].dkr.ecr.ap-southeast-1.amazonaws.com/devopscorner/laravel-kubernetes:latest
  

• ECR Pull

  docker pull [ECR_PATH]/[DOCKER_IMAGE_NAME]:[TAG]
  ---
  docker pull [AWS_ACCOUNT].dkr.ecr.ap-southeast-1.amazonaws.com/devopscorner/laravel-kubernetes:latest
  

Copyright

• Author: DevOps Corner
• License: Apache v2