Connector for Kubernetes Engine

Workflows connector that defines the built-in function used to access a Kubernetes Engine container-based application within a workflow.

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For detailed documentation that includes this code sample, see the following:

Code sample

YAML

# This workflow demonstrates how to use the Google Kubernetes Engine (GKE) connector:
# Create a GKE cluster and then delete it
# Each step waits until the long-running operation of creating or deleting the cluster completes
# Expected output: "SUCCESS"
main:
  params: []
  steps:
    - init:
        assign:
          - project_id: ${sys.get_env("GOOGLE_CLOUD_PROJECT_ID")}
          - cluster_zone: "us-central1-a"
          - cluster_id: "CLUSTER_ID"  # replace CLUSTER_ID placeholder
          - cluster_full_name: ${"projects/" + project_id + "/locations/" + cluster_zone + "/clusters/" + cluster_id}
    - create_gke_cluster:
        call: googleapis.container.v1.projects.zones.clusters.create
        args:
          projectId: ${project_id}
          zone: ${cluster_zone}
          body:
            cluster:
              name: ${cluster_id}
              initial_node_count: 1
            parent: ${"projects/" + project_id + "/locations/" + cluster_zone}
    - assert_running:
        call: assert_cluster_status
        args:
          expected_status: "RUNNING"
          project_id: ${project_id}
          cluster_zone: ${cluster_zone}
          cluster_id: ${cluster_id}
          cluster_full_name: ${cluster_full_name}
    - delete_gke_cluster:
        call: googleapis.container.v1.projects.zones.clusters.delete
        args:
          projectId: ${project_id}
          zone: ${cluster_zone}
          clusterId: ${cluster_id}
          name: ${cluster_full_name}
    - the_end:
        return: "SUCCESS"

assert_cluster_status:
  params:
    [expected_status, project_id, cluster_zone, cluster_id, cluster_full_name]
  steps:
    - get_cluster:
        call: googleapis.container.v1.projects.zones.clusters.get
        args:
          projectId: ${project_id}
          zone: ${cluster_zone}
          clusterId: ${cluster_id}
          name: ${cluster_full_name}
        result: cluster
    - compare:
        switch:
          - condition: ${cluster.status == expected_status}
            next: end
    - fail:
        raise: ${"Expected VM status is " + expected_status + ". Received " + cluster.status + " instead."}

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