Pipeline

The Pipeline represents a data processing job (a simpler version of this is called MonoVertex). The most important concept in Numaflow, it defines:

1. A list of vertices, which define the data processing tasks;
2. A list of edges, which are used to describe the relationship between the vertices. Note an edge may go from a vertex to multiple vertices, and an edge may also go from multiple vertices to a vertex. This many-to-one relationship is possible via Join and Cycles

The Pipeline is abstracted as a Kubernetes Custom Resource. A Pipeline spec looks like below.

apiVersion: numaflow.numaproj.io/v1alpha1
kind: Pipeline
metadata:
  name: simple-pipeline
spec:
  vertices:
    - name: in
      source:
        generator:
          rpu: 5
          duration: 1s
    - name: cat
      udf:
        builtin:
          name: cat
    - name: out
      sink:
        log: {}
  edges:
    - from: in
      to: cat
    - from: cat
      to: out

To query Pipeline objects with kubectl:

kubectl get pipeline # or "pl" as a short name