Microservices CI/CD Pipeline Stack

Overview

Example full pipeline stack CI/CD for deploy code from git to Kubernetes of microservice system

Architecture

Result

Deeper Describe

Applications are deployed using Helm. Each application has a "dev", "test" and "prod" sub-directory corresponding to the environments used in the application release promotion process.

apps
├── backend
    ├── service-1
        ├── dev
        │   ├── Chart.yaml
        │   └── values.yaml
        ├── prod
        │   ├── Chart.yaml
        │   └── values.yaml
        └── test
            ├── Chart.yaml
            └── values.yaml

Each helm chart uses dependency management to pull in the correct chart version. In this case the ba-service repository is publishing a versioned Helm chart.

apiVersion: v2
appVersion: v1.0.0
dependencies:
  - alias: app
    name: be-service
    repository: https://anthoai97.github.io/cicd-pipeline-stack-for-microservices
    version: 0.0.3
description: A Helm chart for Spring Boot demo application
name: service-1
type: application
version: "1.16.0"

The values.yaml file is used to customize any settins for the target environment

app:
  nameOverride: "service-1"
  replicaCount: 1

ArgoCD configuration

Each environment type is represented within ArgoCD as a Project. There is an additional ApplicationSet to generate the Application configuration for each deployment using helm.

argocd
├── dev
│   ├── ApplicationSet.yaml
│   └── AppProject.yaml
├── prod
│   ├── ApplicationSet.yaml
│   └── AppProject.yaml
└── test
    ├── ApplicationSet.yaml
    └── AppProject.yaml

Notes:

• The environment settings are contained in separate directories, enabling them to be deployed to different Kubernetes clusters

Testing Helm charts

The following command will download the remote helm chart dependencies

helm dependencies update apps/backend/service-1/dev

These are stored locally as follows

apps/backend/service-1
└── dev
    ├── Chart.lock
    ├── Chart.yaml
    └── charts
        └── abc-1.0.1.tgz

Now possible to review the generated YAML manifests for Kubernetes

helm template rel1 apps/backend/service-1/dev