DevOps Expert

ArgoCD — Advanced Configuration¶

ArgoCDGitOpsKubernetesMulti-cluster 5 min read

ArgoCD ApplicationSets, multi-cluster management, Sync Waves and hook-based deployments.

ApplicationSets¶

ApplicationSet controller generates ArgoCD Applications dynamically — ideal for multi-cluster and multi-tenant scenarios.

apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: microservices
spec:
  generators:
    - git:
        repoURL: https://github.com/org/manifests
        revision: main
        directories:
          - path: apps/*
  template:
    metadata:
      name: '{{path.basename}}'
    spec:
      project: default
      source:
        repoURL: https://github.com/org/manifests
        targetRevision: main
        path: '{{path}}'
      destination:
        server: https://kubernetes.default.svc
        namespace: '{{path.basename}}'

Sync Waves & Hooks¶

Sync waves control deployment order. Hooks run jobs in specific phases of sync cycle.

metadata:
  annotations:
    argocd.argoproj.io/sync-wave: "-1"
    argocd.argoproj.io/hook: PreSync
---
apiVersion: batch/v1
kind: Job
metadata:
  name: db-migration
  annotations:
    argocd.argoproj.io/hook: PreSync
    argocd.argoproj.io/hook-delete-policy: HookSucceeded
spec:
  template:
    spec:
      containers:
        - name: migrate
          image: app:latest
          command: ["/migrate"]
      restartPolicy: Never

Multi-cluster Management¶

ArgoCD can manage dozens of clusters from single instance.

# Adding cluster
argocd cluster add prod-eu-west-1 --name prod-eu

# Declarative Secret
apiVersion: v1
kind: Secret
metadata:
  name: prod-cluster
  namespace: argocd
  labels:
    argocd.argoproj.io/secret-type: cluster
stringData:
  name: prod-eu
  server: https://prod-eu.example.com
  config: |
    {"bearerToken": "...", "tlsClientConfig": {"insecure": false}}

Summary¶

ArgoCD advanced features like ApplicationSets and Sync Waves enable scaling GitOps to enterprise level.

Need Help with Implementation?¶

Our team has experience designing and implementing modern architectures. We’re happy to help.

Free Consultation