128 lines
4.2 KiB
Bash
Executable File
128 lines
4.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Usage: ./update_docker_images.sh [--prune] [--build] [compose-directory]
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# By default, pull non-buildable images and update services without pruning or building.
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# Continue after project failures; report them and exit nonzero at the end.
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# WARNING: Pruning removes stopped containers, unused images, build cache,
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# and unused anonymous volumes.
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set -euo pipefail
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usage() {
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printf 'Usage: %s [--prune] [--build] [compose-directory]\n' "$0"
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printf '%s\n' \
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' --prune Remove unused Docker resources before updating (including volumes).' \
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' --build Build images with --pull before updating services.' \
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' -h, --help Show this help.' \
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'Default: pull images for services without build definitions and update services.' \
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'Services with build definitions keep their local images unless --build is used.' \
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'Project failures are reported at the end; other projects are still updated.'
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}
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prune=false
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build=false
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positional=()
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while (( $# )); do
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case "$1" in
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--prune) prune=true ;;
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--build) build=true ;;
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-h|--help) usage; exit 0 ;;
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--) shift; positional+=("$@"); break ;;
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-*) printf 'Unknown option: %s\n' "$1" >&2; usage >&2; exit 2 ;;
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*) positional+=("$1") ;;
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esac
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shift
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done
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if (( ${#positional[@]} > 1 )); then
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usage >&2
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exit 2
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fi
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compose_root=${positional[0]:-/etc/docker/compose}
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if [[ ! -d "$compose_root" ]]; then
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printf 'Compose directory not found: %s\n' "$compose_root" >&2
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exit 1
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fi
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created_builder=
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cleanup() {
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local status=$?
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trap - EXIT
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if [[ -n "$created_builder" ]]; then
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if ! docker buildx rm "$created_builder"; then
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printf 'Could not remove builder: %s\n' "$created_builder" >&2
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if (( status == 0 )); then
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status=1
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fi
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fi
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fi
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exit "$status"
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}
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trap cleanup EXIT
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trap 'exit 130' INT
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trap 'exit 143' TERM
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if "$prune"; then
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docker system df
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docker system prune -a --volumes -f
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docker system df
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fi
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if "$build"; then
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# Select an existing container builder, not merely check whether one exists.
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# Capture the list separately so a failed Docker command stops the script.
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# DriverEndpoint contains the driver for builders and the endpoint for nodes.
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builders=$(docker buildx ls --format '{{.Name}} {{.DriverEndpoint}}')
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builder=
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while read -r name driver; do
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if [[ "$driver" == docker-container ]]; then
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builder=$name
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break
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fi
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done <<< "$builders"
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if [[ -z "$builder" ]]; then
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# Bootstrap separately so cleanup can run if startup fails.
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created_builder=$(docker buildx create \
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--buildkitd-config /etc/docker/buildx/buildkit.toml \
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--driver docker-container \
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--driver-opt 'network=treehouse')
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builder=$created_builder
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fi
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# Select the builder for this script without changing the user's default.
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export BUILDX_BUILDER="$builder"
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docker buildx inspect "$builder" --bootstrap
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fi
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failed_projects=()
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for directory in "$compose_root"/*; do
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[[ -d "$directory" ]] || continue
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[[ -f "$directory/docker-compose.yml" ]] || continue
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# Manually update Minecraft, so we're not always on the cutting edge
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[[ "$directory" == *minecraft* ]] && continue
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printf '\nUpdating %s\n' "$directory"
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# A subshell restores the working directory even when a command fails.
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# Because it is tested by 'if', explicitly stop on each failed command;
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# Bash does not apply 'set -e' inside this conditional subshell.
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if (
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cd -- "$directory" || exit "$?"
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docker compose pull --ignore-buildable || exit "$?"
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if "$build"; then
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docker compose build --pull || exit "$?"
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fi
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# Do not let Compose implicitly build images when starting services.
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docker compose up -d --no-build
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); then
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printf 'Updated %s\n' "$directory"
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else
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status=$?
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printf 'Update failed for %s (exit %s); continuing.\n' "$directory" "$status" >&2
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failed_projects+=("$directory")
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fi
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done
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if (( ${#failed_projects[@]} )); then
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printf '\nFailed projects:\n' >&2
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printf ' %s\n' "${failed_projects[@]}" >&2
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exit 1
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fi
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