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Concourse resource for zero-downtime deploys on CloudFoundry
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README.md

Deploy application to Cloud Foundry with zero downtime.

Features:

  • CF manifest is the truth
  • UP application name stays the same
  • Play well with CF services like SSO, Eureka, ...
  • Use CF built-in health check (as specified in the manifest)
  • Ability to bind services that requires binding configuration (not supported in manifest.yml)
  • Can be used as input

Health check

The health check of the newly deployed application is based on the manifest health-check-type.

It is strongly recommended to user health-check-type: http and health-check-http-endpoint to specify a health check route if your application uses http.

resource_types

- name: cf-zero-downtime-resource
  type: docker-image
  source:
    repository: emeraldsquad/cf-zero-downtime-resource
    tag: "0.5.2"

For a list of available tags, consult our Docker Hub repo.

source

  • api : required the api endpoint of the Cloud Foundry Cloud Controller
  • one of:
    • user credentials
      • username: required username to authenticate
      • password: required password to authenticate
    • application credentials
      • client_id: required client id to authenticate
      • client_secret: required client secret to authenticate
  • organization : required the name of the organization to push to
  • space : required the name of the space to push to
  • skip_cert_check : (not implemented yet) optional (true or false) skip TLS certificate validation (default: false)
  • verbose : (not implemented yet) optional (true or false) make cf CLI more verbose using CF_TRACE=true (default: false)

check

Get the deployed app metadata. Only one version is ever returned.

ex:

[
  {
    "guid": "5bac9193-ab1a-4f7c-9761-cb082b4068f1",
    "url": "/v2/apps/5bac9193-ab1a-4f7c-9761-cb082b4068f1",
    "created_at": "2018-06-15T18:15:30Z",
    "updated_at": "2018-06-15T18:15:37Z"
  }
]

in

Read in app information into app.json (equivalent to cf curl /v2/apps/$(cf app NAME --guid))

Only the guid attribute in the passed in version is taken into account.

out

Push app to CloudFoundry with zero-downtime. Current app matching name will be renamed with the -venerable suffix (if an app with the suffix already exists, it will be deleted).

If the push failed, the failed app will be stopped and renamed with the -failed suffix. Recent logs will be outputted to make diagnosis easier. The current working app will be renamed back to it's original name.

params

  • name : required name of the app to push
  • manifest : required manifest of the app to push. The path element inside the manifest will be ignored. The manifest must have only one application and it must be present under the applications key. The manifest can also be specified inline, see bellow for an example.
  • path : required (except for docker images) path for the app bits to deploy. a Glob can be specified, but it must resolve to only one path. If multiple paths match the blob, the deploy will fail (before any interaction with CF)
  • environment_variables : optional a set of environment variable to set in the manifest file before pushing the app. They will take precedence over any environment variables present.
  • docker_username : optional used to authenticate to private docker registry when pushing docker image.
  • docker_password : optional used to authenticate to private docker registry when pushing docker image.

For service binding that requires configuration, you can also specify:

  • services: optional array of additional service bindings that cannot be expressed in the manifest (services that requires a configuration object)
    • name: required name of the service to bind to
    • config: required configuration object to pass to bind-service

Example:

jobs:
- name: deploy
  plan:
  - get: my-app-package
  - put: cf-zero-downtime
    params:
      name: my-app
      manifest: my-app-package/manifest.yml
      path: my-app-package/my-app.jar
      services:
      - name: my-service
        config:
          share: my-share
          mount: /home/my-app/data
          uid: "1000"
          gid: "1000"

Inline Manifest

Instead of providing a path to the manifest file, you can inline the manifest directly in the pipeline.

Example:

jobs:
- name: deploy
  plan:
  - get: my-app-dist
  - put: cf-zero-downtime
    params:
      name: my-app
      path: my-app-dist
      manifest:
        applications:
        - name: my-app
          buildpack: nodejs_buildpack
          memory: 64M
          health-check-type: http
          health-check-http-endpoint: /good
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