docker-dind

Docker image for CI jobs that need Docker-in-Docker and helper scripts.

Base image

• Pinned by default to docker:27.5.1-dind@sha256:aa3df78ecf320f5fafdce71c659f1629e96e9de0968305fe1de670e0ca9176ce.
• You can override with DOCKER_IMAGE_TAG and DOCKER_IMAGE_DIGEST build args.

Build

docker build --no-cache --pull -t index.exp.railsc.ru/abakpress/dind-testing:latest .

CI kernel compatibility

prepare-build sets DOCKER_INSECURE_NO_IPTABLES_RAW=1 by default for environments where iptables raw table is unavailable. This mostly matters for Docker 28+; on Docker 27 it is typically harmless.