ArgoCD: Defining groups of applications using ApplicationSet generators: list
2 min read | by Jordi Prats
With ArgoCD's ApplicationSet controller we can automate the Application creation by automatically generate Argo CD Applications based on the ApplicationSet template.
Withing the ApplicationSet we can choose between several generators that can be used to create the Application instances
One of the possible generators is the list generator. With it we can specify a list of elements with as many attributes as we need that will be rendered using the spec.template. For example:
apiVersion: argoproj.io/v1alpha1 kind: ApplicationSet metadata: name: pet2cattle-versions namespace: argocd spec: generators: - list: elements: - target: 1.0.0 instance: v1 - target: 2.0.0 instance: v2 template: metadata: name: pet2cattle-{{ instance }} spec: project: default syncPolicy: automated: prune: true selfHeal: true syncOptions: - CreateNamespace=true source: repoURL: ssh://git@github.com:jordiprats/helm-pet2cattle.git path: . targetRevision: "{{ target }}" helm: values: | ingress: hosts: - "{{ instance }}.pet2cattle.com destination: server: https://kubernetes.default.svc namespace: pet2cattle This is going to create the following two Applications:
apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: pet2cattle-v1 spec: project: default syncPolicy: automated: prune: true selfHeal: true syncOptions: - CreateNamespace=true source: repoURL: ssh://git@github.com:jordiprats/helm-pet2cattle.git path: . targetRevision: "1.0.0" helm: values: | ingress: hosts: - "v1.pet2cattle.com" destination: server: https://kubernetes.default.svc namespace: pet2cattle --- apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: pet2cattle-v2 spec: project: default syncPolicy: automated: prune: true selfHeal: true syncOptions: - CreateNamespace=true source: repoURL: ssh://git@github.com:jordiprats/helm-pet2cattle.git path: . targetRevision: "2.0.0" helm: values: | ingress: hosts: - "v2.pet2cattle.com" destination: server: https://kubernetes.default.svc namespace: pet2cattle So, with this generator we can just add more elements to the list to automatically deploy a new application.
Posted on 08/06/2022