Skip to content

Dag Enhanced Depends

Note

This example is a replication of an Argo Workflow example in Hera. The upstream example can be found here.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
from hera.workflows import DAG, Container, Workflow

with Workflow(
    generate_name="dag-diamond-",
    entrypoint="diamond",
) as w:
    pass_ = Container(
        name="pass",
        image="alpine:3.7",
        command=["sh", "-c", "exit 0"],
    )
    fail = Container(
        name="fail",
        image="alpine:3.7",
        command=["sh", "-c", "exit 1"],
    )
    with DAG(name="diamond"):
        A = pass_(name="A")
        B = pass_(name="B")
        C = fail(name="C")
        should_execute_1 = pass_(name="should-execute-1", depends="A && (C.Succeeded || C.Failed)")
        should_execute_2 = pass_(name="should-execute-2", depends="B || C")
        should_not_execute = pass_(name="should-not-execute", depends="B && C")
        should_execute_3 = pass_(name="should-execute-3", depends="should-execute-2.Succeeded || should-not-execute")

        A >> [B, C]

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: dag-diamond-
spec:
  entrypoint: diamond
  templates:
  - container:
      command:
      - sh
      - -c
      - exit 0
      image: alpine:3.7
    name: pass
  - container:
      command:
      - sh
      - -c
      - exit 1
      image: alpine:3.7
    name: fail
  - dag:
      tasks:
      - name: A
        template: pass
      - depends: A
        name: B
        template: pass
      - depends: A
        name: C
        template: fail
      - depends: A && (C.Succeeded || C.Failed)
        name: should-execute-1
        template: pass
      - depends: B || C
        name: should-execute-2
        template: pass
      - depends: B && C
        name: should-not-execute
        template: pass
      - depends: should-execute-2.Succeeded || should-not-execute
        name: should-execute-3
        template: pass
    name: diamond

Comments