Gitlab CI 每次作业使用后再次保存缓存

Question

基于 Gitlab CI 关于缓存归档和提取工作原理的文档 (https://docs.gitlab.com/ee/ci/caching/#how-archiving-and-extracting-works)：

stages:
  - build
  - test

before_script:
  - echo "Hello"

job A:
  stage: build
  script:
    - mkdir vendor/
    - echo "build" > vendor/hello.txt
  cache:
    key: build-cache
    paths:
      - vendor/
  after_script:
    - echo "World"

job B:
  stage: test
  script:
    - cat vendor/hello.txt
  cache:
    key: build-cache

job A 这里应该创建缓存，job B 应该使用它。

虽然尝试此配置时发生了什么，但 job B 一旦脚本成功执行，而不是结束，再次保存缓存目录（完全没用，没有任何改变，这不是它的目的无论如何）：

Running with gitlab-runner 13.3.1 (738bbe5a)
  on docker-auto-scale fa6cab46
Preparing the "docker+machine" executor
00:40
Using Docker executor with image node:latest ...
Pulling docker image node:latest ...
Using docker image sha256:c2b4a3b480bf1adee17db717baa58f4b13c59cc712cd4199706406aa09ea0566 for node:latest ...
Preparing environment
00:04
Running on runner-fa6cab46-project-[REDACTED]-concurrent-0 via runner-fa6cab46-srm-1599721095-1e9a7c0b...
Getting source from Git repository
00:03
$ eval "$CI_PRE_CLONE_SCRIPT"
Fetching changes with git depth set to 50...
Initialized empty Git repository in /builds/[REDACTED]/.git/
Created fresh repository.
Checking out b24f54fb as v1.3.0...
Skipping Git submodules setup
Restoring cache
00:21
Checking cache for v1-3-0_modules_app-26...
Downloading cache.zip from https://storage.googleapis.com/gitlab-com-runners-cache/project/[REDACTED]/v1-3-0_modules_app-26 
Successfully extracted cache
Executing "step_script" stage of the job script
[...]
Saving cache
00:43
Creating cache v1-3-0_modules_app-26...
untracked: found 66568 files                       
Uploading cache.zip to https://storage.googleapis.com/gitlab-com-runners-cache/project/[REDACTED]/v1-3-0_modules_app-26 
Created cache
[...]

除了文档没有提到这个“功能”之外，如何在后续作业中使用缓存而不让每个作业都浪费时间再次缓存它？

Answer 1

这是 gitlab 的正常行为，但你可以通过定义一个简单的策略来实现你想要的

在此处查看文档https://docs.gitlab.com/ee/ci/caching/#inherit-global-config-but-override-specific-settings-per-job

类似

  key: ${CI_COMMIT_REF_SLUG}
  paths:
    - node_modules/
    - public/
    - vendor/
  policy: pull-push

job:
  cache:
    # inherit all global cache settings
    <<: *global_cache
    # override the policy
    policy: pull

在此示例中，作业（称为作业）只会拉取缓存

Gitlab CI 每次作业使用后再次保存缓存

Gitlab CI saves the cache again after each job using it

caching

pipeline

gitlab

gitlab-ci