Deploy Applications in Multi-Cluster with ArgoCD

🌩️ How to deploy applications in an multi-cluster environment distributed across multiple clouds using ArgoCd and its native operators.🌩️
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Introduction

This repository serves as an example for using ArgoCD with multi-cluster deployments in different cloud providers.

Background Knowledge

Before diving into the repository, it's important to understand the following concepts:

• ArgoCD: A declarative, GitOps continuous delivery tool for Kubernetes.
• ArgoCD ApplicationSets: An Argo CD extension which adds support for new and innovative ways to automatically create Argo CD Applications.
• ApplicationSet Generators: Generators create a list of Argo CD Applications, based on of parameters that they are provided.

Directory Structure

The repository is organized as follows:

├── argocd                              ## rooot argocd directory
│   ├── bootstrap                       ## bootstrap configs ( secrets , projects etc.)
│   │   └── secrets
│   │       ├── clusters                ## clusters as secrets in argocd management cluster
│   │       └── repositories            ## repositories as secrets in argocd management cluster
│   ├── common                          ## common directory for all applications need to be deployed through all clusters
│   │   ├── README.md
│   │   ├── cert-manager
│   │   │   └── applicationset.yaml
│   │   ├── demo-app
│   │   │   └── applicationset.yaml
│   │   ├── external-dns
│   │   │   └── applicationset.yaml
│   │   ├── external-secrets-operator
│   │   │   └── applicationset.yaml
│   │   └── nginx-ingress-controller
│   │       └── applicationset.yaml
│   ├── envs                                              ## deployment environments( dev, stage , prod etc.) have same structure.
│   │   ├── stage                                         ## dev/playground environment clusters directory configuration.
│   │   │   ├── aws                                       ## AWS cloud clusters directory configuration.
│   │       │   ├── globals                               ## Global Env. values for AWS cloud per app ::risk:: impacts all aws clusters in dev env.(disabled)
│   │   │   │   │   ├── cert-manager                      ## Cert Manager ( Any Application holding global values for aws cloud ) (feature disabled in repo)
│   │   │   │   │   │   └── values.yaml                   ## Global app Values , will be merged with regional values. (feature disabled in repo)
│   │   │   │   ├── eu-central-01                         ## AWS region specific clusters configuration.
│   │   │   │   │   ├── cert-manager                      ## example app also used as namespace value in the applicationn set
│   │   │   │   │   │   ├── git-generator-overides.json   ## git file generator for config management of appset, such as chart version
│   │   │   │   │   │   └── values.yaml                   ## regional, cloud ,and environment specific values file
│   │   │   │   │   └── demo-app
│   │   │   │   │       ├── git-generator-overides.json
│   │   │   │   │       ├── kustomization.yaml
│   │   │   │   │       └── sample-app.yaml
│   │   │   │   └── us-east-01
│   │   │   ├── azure                                     ## Azure cloud clusters directory
│   │   │   └── gcp                                       ## GCP cloud clusters directory
│   │   │   └── globals                                   ## Global dev env values per app ::risk:: impacts all clusters in dev env.(feature disabled in repo)
│   │   │       └── cert-manager                          ## Cert Manager ( Any Application holding global values )  (feature disabled in repo)
|   │   │           └── values.yaml                       ## Global app Values , will be merged with regional values. (feature disabled in repo)
│   │   └── dev
│   │       ├── aws
│   │       │   ├── eu-central-01
│   │       │   └── us-east-01
│   │       │       ├── README.md
│   │       │       └── cert-manager
│   │       │           ├── git-generator-overides.json
│   │       │           └── values.yaml
│   │       ├── azure
│   │       │   ├── globals
│   │       │   │   └── README.md
│   │       │   ├── north-europe
│   │       │   │   ├── cert-manager
│   │       │   │   │   ├── git-generator-overides.json
│   │       │   │   │   └── values.yaml
│   │       │   │   ├── demo-app
│   │       │   │   │   ├── git-generator-overides.json
│   │       │   │   │   ├── ingress.yaml
│   │       │   │   │   ├── kustomization.yaml
│   │       │   │   │   ├── sample-app.yaml
│   │       │   │   │   └── service.yaml
│   │       │   │   ├── external-dns
│   │       │   │   │   ├── git-generator-overides.json
│   │       │   │   │   └── values.yaml
│   │       │   │   ├── external-secrets
│   │       │   │   │   ├── git-generator-overides.json
│   │       │   │   │   └── values.yaml
│   │       │   │   └── ingress-nginx-controller
│   │       │   │       ├── git-generator-overides.json
│   │       │   │       └── values.yaml
│   │       │   └── west-europe
│   │       ├── gcp
│   │       │   ├── asia-east1
│   │       │   └── europe-west1
│   │       └── globals
│   │           └── README.md
│   │
│   └── yamls
├── charts                            ## local charts , in case umbrella or custom chart is needed
│   ├── external-secrets-operator
│   │   ├── charts
│   │   └── templates
└── terraform                         ## just for this repo context , terraform configs for the infra provisioning

Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have any suggestion that would make this project better, feel free to fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement" with your suggestion.

⭐️ Don't forget to give the project a star! Thanks again! ⭐️

License

Released under MIT by @ishuar.

Contact

• 👯 LinkedIn

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