GitOps CI/CD Implementation using ArgoCD on DigitalOcean

Argo CD follows the GitOps pattern of using Git repositories as the source of truth for defining the desired application state. Kubernetes manifests can be specified in several ways:

• kustomize applications

• helm charts

• ksonnet applications

• jsonnet files

• Plain directory of YAML/json manifests

• Any custom config management tool configured as a config management plugin

Argo CD automates the deployment of the desired application states in the specified target environments. Application deployments can track updates to branches, tags, or pinned to a specific version of manifests at a Git commit.

It is the de factor currently in deploying Applications on Kubernetes. Take Note that you still need a Continuous Integration tool, such as Gitlab to have more flexibility.

Characteristics of the Demo Project:

- Demonstrate how to use GitOps in your organization.
- Use Terraform for K8s and Spaces in D.O.
- Use Kustomize.
- Use Helm Charts.
- Remote Terraform State
- Use HashiCorp Vault for Managing Secrets ( ArgoCD Secrets? / Github Token Secrets ) https://argo-cd.readthedocs.io/en/stable/operator-manual/secret-management/
- Cert Manager

Without further ado, let's start.

Step 1: Provision a K8s Cluster and D.O. Space using Terraform.

We need to have a Kubernetes Cluster and an object storage to backup our Terraform State File.

Code HERE

Step 2: Install ARGOCD via HELM Deployment. ARGOCD

Step 3: Refer to the instruction here: Sample ArgoCD Demo Project