Decap

Build

Prerequisites (developer laptop)

• Go compiler (go1.18 or above)

• Docker (18.06 or above)

On laptop

$ go build ./cmd/...
$ docker-compose build

Run locally

$ ./decap

or via Docker

$ docker-compose up -d

Deploy

Prerequisites (deployment server)

• Docker (18.06 or above)

• Variant of docker-compose.yml configured for deployment (and without build steps)

  • If there are multiple configurations, the filename should match the deployment host

On laptop

$ docker login <docker registry>
$ docker-compose push

On server

(Perform docker login like above if needed.)

$ cd <main repo root>/conf/decap
$ docker-compose -f docker-compose-<hostname>.yml pull
$ docker-compose -f docker-compose-<hostname>.yml up -d

Maintenance and other arcana

Update Decap dependencies to the newest version

$ go get -u github.com/chromedp/chromedp

Bypass Docker registry when deploying image to server

When performing rapid successive Decap deployments using different Chromium binaries, we can avoid polluting the Docker registry with hundreds of megabytes of additional binary blobs by using docker save and docker load.

On laptop (→ remote host)

$ docker save <docker registry>/decap:latest | ssh <remote host> docker load

On remote jump host (→ production host)

$ docker save <docker registry>/decap:latest | ssh <more remote host> docker load