concourse capacity pattern

capacity repo

git repo should have structure similar to this. those capacity numbers are just empty files which represent a single capacity unit.

├── capacity
│   ├── claimed
│   │   └── 2
│   └── unclaimed
│       ├── 1
│       ├── 3
│       ├── 4
│       ├── 5
│       ├── 6
│       ├── 7
│       └── 8

pipeline.yml

resources:
  - name: capacity
    type: pool
    source:
      uri: <git-url>
      pool: capacity             # please see the above capacity repo note for details setting up a proper repo as pool
      branch: master
      private_key: ((git-private-key))

jobs:
  - name: a-heavy-job
    plan:
      - put: capacity
        attempts: 2              # recommend to have multiple attempts, since sometimes checkout resource will timeout
        params: { acquire: true }
      - task: a-heavy-task
        config: ....
    ensure:
      put: capacity
      params: { release: capacity }