PITCHME.md

@title[Introduction]

Offline Docker

How to use docker for (almost) continuous delivery to an offline environment.*

[ Docker, Compose, Linux, Windows ]

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Initial Situation

• Apps built with Docker |
• Orchestrated with docker-compose |

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Production Environment

• disconnected, |
• remote or |
• just inaccessible. |
• How to deploy? |

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Docker Workflow

• Similar to Git:
  • Git: Workflow for code |
  • Docker: Workflow for runtime images |

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Changes, Revisions

• git commit |
• docker commit, docker build |

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Tagging

• git tag |
• docker tag |

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Publish

• git push |
• docker push |

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Consume

• git pull |
• docker pull |

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Transfer Medium (online)

• git server (e.g. GitHub) |
• docker registry (e.g. DockerHub) |

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Transfer Medium (offline)

• git bare repository |
• docker registry (custom) |

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Demo

+++

@title[Step 1. Build & Push]

STEP 1. Build & Push

$ docker-compose up -d registry ui
$ docker-compose build
$ docker-compose push

@[1](Start local Docker registry (on :5000, Web UI at :8080)) @[2](Build all apps (...tag to localhost:5000)) @[3](Push built images to registry)

+++

Registry frontend on :8080

+++

Pull Through Cache

You can also access local images, e.g. from your company registry.

Add the registry acting as pull through cache to docker-compose:

environment:
    ...
    REGISTRY_PROXY_REMOTEURL: https://<your-awesome-registry>

Afterwards just pull your local images:

docker pull localhost:5000/<repo>/<image>:<tag>

+++ @title[Step 2. Export]

STEP 2. Export

docker-compose run export
docker save -o ./data/registry.tar registry:2.6.2 konradkleine/docker-registry-frontend:v2

@[1](Export volume docker_images -> ./data/docker_images.bz2.) @[2](Save registry images (you're offline, remember?))

+++ @title[Step 3. Ship It!]

STEP 3. Ship It!*

*Not our business here.

+++ @title[Step 4. Import & Run]

STEP 4. Import & Run

docker load -i ./data/registry.tar
docker-compose run import
docker-compose up -d registry ui
docker run [registry:5000]/mycompany/myapp:latest

@[1](Load registry images (you're offline, rembember?)) @[2](Import volume ./data/docker_images.bz2 -> docker_images) @[3](Start your registry) @[4](Run images, pulling from your registry)

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Ok, got it! How to apply to my project?

+++?code=docker-compose.yml&lang=yml

In your docker-compose.yml:

@[5](Tag images to local registry localhost:5000)

+++?code=docker-compose.override.yml&lang=yml

Add this docker-compose.override.yml for:

@[11-13](Docker registry) @[24-25](Web UI for registry) @[43-45,47-49](Export & Import) @[51-52](Docker volume for registry images)

• That's it! |

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