CODEWITHSUNDEEP
kubernetesgoogle-kubernetes-enginebazelkubectlgoogle-cloud-build
Florian Ludewig
Florian Ludewig

Reputation: 6002

Cloud Build kubectl - How to Apply Output of Previous Step to Kubernetes Cluster

I have a simple cloudbuild.yaml file which runs a Bazel command. This command returns a Kubernetes configuration in form as a log output.

My goal is to take the output of the first step and apply it to my Kubernetes cluster.

steps:
  - name: gcr.io/cloud-builders/bazel
    args: ["run", "//:kubernetes"]

  - name: "gcr.io/cloud-builders/kubectl"
    args: ["apply", "<log output of previous step>"]
    env:
      - "CLOUDSDK_COMPUTE_ZONE=europe-west3-a"
      - "CLOUDSDK_CONTAINER_CLUSTER=cents-ideas"

Update

I've tried the following:

- name: gcr.io/cloud-builders/bazel
  entrypoint: /bin/bash
  args:
    [
      "bazel",
      "run",
      "//:kubernetes",
      " > kubernetes.yaml",
    ]

- name: "gcr.io/cloud-builders/kubectl"
  args: ["apply", "-f", "kubernetes.yaml"]
  env:
    - "CLOUDSDK_COMPUTE_ZONE=europe-west3-a"
    - "CLOUDSDK_CONTAINER_CLUSTER=cents-ideas"

But then I get this error:

Running: kubectl apply -f kubernetes.yaml
error: the path "kubernetes.yaml" does not exist

Upvotes: 1

Views: 878

Answers (2)

Emil Gi
Emil Gi

Reputation: 1168

As everyone already suggested here use volumes.

Tweak your cloudbuild.yaml file like this:

- name: gcr.io/cloud-builders/bazel
  entrypoint: /bin/bash
  args:
    [
      "bazel",
      "run",
      "//:kubernetes",
      " > /workspace/kubernetes.yaml",
    ]

- name: "gcr.io/cloud-builders/kubectl"
  args: ["apply", "-f", "/workspace/kubernetes.yaml"]
  env:
    - "CLOUDSDK_COMPUTE_ZONE=europe-west3-a"
    - "CLOUDSDK_CONTAINER_CLUSTER=cents-ideas"

Upvotes: 1

Lance Sandino
Lance Sandino

Reputation: 336

Here's how to mount the volume:

https://cloud.google.com/cloud-build/docs/build-config#volumes

Basically add:

  volumes:
  - name: 'vol1'
    path: '/persistent_volume'

Then reference full path /persistent_volume/filename/ when writing / reading to your file.

Upvotes: 2

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