synchronization-tmpl-level.yaml

# This example demonstrates the use of a Synchronization lock on template execution. Synchronization lock limits
# the number of concurrent template execution across the workflows in the namespace which has same Synchronization lock.
# Synchronization limit value can be configured in configmap. Eg.:
# apiVersion: v1
# kind: ConfigMap
# metadata:
#   name: my-config
# data:
#   template: "3"
#---
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: synchronization-tmpl-level-
spec:
  entrypoint: synchronization-tmpl-level-example
  templates:
  - name: synchronization-tmpl-level-example
    steps:
    - - name: synchronization-acquire-lock
        template: acquire-lock
        arguments:
          parameters:
          - name: seconds
            value: "{{item}}"
        withParam: '["1","2","3","4","5"]'

  - name: acquire-lock
    synchronization:
      semaphore:
        configMapKeyRef:
          name: my-config
          key: template
    container:
      image: alpine:latest
      command: [sh, -c]
      args: ["sleep 10; echo acquired lock"]