Pass build secret from file

Feed a secret to BuildKit; only RUN --mount=type=secret,id=token sees it, not history

docker buildx build --secret id=token,src=token.txt -t <name> .
tool
docker46 commands
tags
dockerbuildkitsecretssecurity

More docker commands

  • Remote daemon over SSH
    docker context create remote --docker host=ssh://<host> && docker context use remote

    Run docker against a remote daemon over SSH; no exposed TCP socket needed

  • Hardened read-only container
    docker run --read-only --tmpfs /tmp --security-opt no-new-privileges --cap-drop ALL <name>

    Immutable rootfs, writable /tmp only, block privilege escalation; container hardening

  • Watch for OOM kills
    docker events --filter event=oom --filter type=container

    Stream live OOM events to catch memory-limited containers being killed

  • Multi-platform build and push
    docker buildx build --platform linux/amd64,linux/arm64 -t reg/img:tag --push .

    Cross-compile and push directly to registry with BuildKit

  • Run container with env file
    docker run --rm -it --env-file .env -p 8000:8000 img:tag

    Local run with env vars from file; --rm auto-removes on exit

all 46 docker commands