Argo CD

by  Argo Project

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes.

TL;DR:

  • Installing, updating or removing follows Kubestack's GitOps flow.
  • Instructions assume the default repository layout.
  • Bases can be consumed as-is or customized.
  • Step-by-step instructions are framework specific but bases can be used independently.

Install

  1. Vendor the base

    # Run these commands from the root of your Kubestack infra repository
    wget https://storage.googleapis.com/catalog.kubestack.com/argo-cd-v1.7.8-kbst.0.zip
    unzip -d manifests/bases/ argo-cd-v1.7.8-kbst.0.zip
    rm argo-cd-v1.7.8-kbst.0.zip
  2. Include resource in apps overlay

    cd manifests/overlays/apps
    kustomize edit add resource ../../bases/argo-cd/ha
  3. Commit and push

    cd -
    git checkout -b add-argo-cd
    git add manifests/bases/argo-cd manifests/overlays/apps/kustomization.yaml
    git commit -m "Add argo-cd v1.7.8-kbst.0 base"
    git push origin add-argo-cd
  4. Review PR and merge

    Finally, review and merge the PR into master. Once it's been successfully applied against the Ops-Cluster set a prod-deploy tag to also apply the change against the Apps-Cluster.

Update

To update the operator delete the previously vendored base and then vendor the new version.

  1. Delete the previous vendored version

    # Run these commands from the root of your Kubestack infra repository
    rm -r manifests/bases/argo-cd
  2. Vendor the new version

    # Run these commands from the root of your Kubestack infra repository
    wget https://storage.googleapis.com/catalog.kubestack.com/argo-cd-v1.7.8-kbst.0.zip
    unzip -d manifests/bases/ argo-cd-v1.7.8-kbst.0.zip
    rm argo-cd-v1.7.8-kbst.0.zip
  3. Commit and push

    git checkout -b update-argo-cd
    git add manifests/bases/argo-cd
    git commit -m "Update argo-cd base to v1.7.8-kbst.0"
    git push origin update-argo-cd

Remove

Operators often create resources based on custom objects. When removing an operator, follow a two-step process to ensure operator provisioned resources are purged properly.

  1. Remove all the operator's custom objects.
  2. Once the operator had time to de-provision all resources it created, follow the instructions below to remove the operator itself.
  1. Remove resource from apps overlay

    cd manifests/overlays/apps
    kustomize edit remove resource ../../bases/argo-cd/ha
  2. Delete the vendored base from your repository

    cd -
    # Run these commands from the root of your Kubestack infra repository
    rm -r manifests/bases/argo-cd
  3. Commit and push

    git checkout -b remove-argo-cd
    git add manifests/bases/argo-cd
    git commit -m "Remove argo-cd base"
    git push origin remove-argo-cd

Getting started

After installing Argo CD from the catalog follow the getting started with Argo CD guide continuing with step 2.

When configuring access to the Argo CD API server, consider the Ingress option. The Kubestack catalog includes the Nginx ingress controller (installed by default) and also includes Cert-manager in the catalog. Making it easy to install the prerequisites Argo CD requires for Ingress.