Cloud Build kubectl - 如何将上一步的输出应用到 Kubernetes 集群

Question

我有一个简单的 cloudbuild.yaml 文件，它运行 Bazel 命令。此命令以日志输出形式返回 Kubernetes 配置。

我的目标是获取第一步的输出并将其应用到我的 Kubernetes 集群。

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"

更新

我尝试了以下方法：

- 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"

然后我得到这个错误：

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

Answer 1

以下是安装卷的方法：

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

基本加：

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

然后在写入/读取文件时引用完整路径/persistent_volume/filename/。

Answer 2

将同一目录（不是文件）卷挂到两个步骤中。

将 Bazel 命令输出通过管道传输到文件。

在kubectl apply --filename= 步骤中引用该文件

示例

options:
  volumes:
    - name: test
      path: /test
steps:
  - name: busybox
    args:
      - "ls"
      - "-l"
      - "/test"
  - name: busybox
    entrypoint: "/bin/sh"
    args:
      - "-c"
      - "touch /test/freddie"
  - name: busybox
    args:
      - "ls"
      - "-l"
      - "/test"
  - name: busybox
    args:
      - "cp"
      - "/test/freddie"
      - "/workspace"
  - name: busybox
    args:
      - "ls"
      - "-l"
      - "/workspace"

使用options 定义volumes 将音量应用于所有步骤；您也可以在每个步骤中简单地重复volumes。

这个例子——希望——展示了如何使用默认的/workspace 和用户定义的/test 卷在卷中创建一个文件（并将这个文件复制到默认的/workspace 卷到证明它是添加的。

输出：

BUILD
Starting Step #0
Step #0: Already have image: busybox
Step #0: total 0
Finished Step #0
Starting Step #1
Step #1: Already have image: busybox
Finished Step #1
Starting Step #2
Step #2: Already have image: busybox
Step #2: total 0
Step #2: -rw-r--r--    1 root     root             0 Feb  4 17:53 freddie
Finished Step #2
Starting Step #3
Step #3: Already have image: busybox
Finished Step #3
Starting Step #4
Step #4: Already have image: busybox
Step #4: total 4
Step #4: -rw-r--r--    1 1000     1000           460 Feb  4 17:53 cloudbuild.yaml
Step #4: -rw-r--r--    1 root     root             0 Feb  4 17:53 freddie
Finished Step #4
PUSH
DONE

Answer 3

正如每个人在这里已经建议的那样，使用volumes。

像这样调整你的 cloudbuild.yaml 文件：

- 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"