ApplicationSets: Generate Applications from Templates
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The ApplicationSet: a List generator
An ApplicationSet has two parts: a generator and a template. The generator produces a set of parameters; the template is an Application with blanks in it. For each set of parameters the generator emits, the controller fills in the blanks and creates one Application.
The simplest generator is list, that's the clearest place to start. You write out the parameter sets by hand, one block per cluster.
Here is an example:
cat < $HOME/web-appset.yaml
apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
name: web
namespace: argocd
spec:
generators:
# One element per cluster. Each becomes one Application.
# 'cluster' and 'url' are arbitrary names; they become template params.
- list:
elements:
- cluster: test
url: https://test-api.example:6443
- cluster: prod
url: https://prod-api.example:6443
template:
metadata:
# {{cluster}} expands to 'test' and 'prod', so you get
# two Applications named web-test and web-prod.
name: 'web-{{cluster}}'
spec:
project: default
source:
repoURL: $REPO_URL
targetRevision: main
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