feat: --instance flag for parallel container instances (v0.6.8)#61
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Adds optional --instance NAME to run/exec/stop scripts, enabling multiple
parallel containers from the same repo without name collision.
Design:
- Default invocation unchanged: container = ${IMAGE_NAME}, project name
= ${DOCKER_HUB_USER}-${IMAGE_NAME}
- With --instance dev2: container = ${IMAGE_NAME}-dev2, project name
= ${DOCKER_HUB_USER}-${IMAGE_NAME}-dev2 → fully isolated network/volumes
- compose.yaml's container_name now uses ${IMAGE_NAME}${INSTANCE_SUFFIX:-}
so default keeps the clean name (preserves external `docker exec
${IMAGE_NAME}` patterns) and named instances get a -NAME suffix
- run.sh foreground devel refuses to start if default container already
running (caller must explicit ./stop.sh or use --instance)
- stop.sh gains --instance and --all flags. --all enumerates all matching
compose projects via docker ps label and downs each
213 tests total (was 201): 12 new unit tests for flag parsing, env passing,
help text, and collision refusal.
Note: existing 17 consumer repos need a one-line compose.yaml update to
use ${IMAGE_NAME}${INSTANCE_SUFFIX:-} before --instance works there.
Default behavior is fully backward-compatible until they upgrade.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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This was referenced Apr 24, 2026
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Summary
Adds optional
--instance NAMEtorun.sh/exec.sh/stop.shso you can run multiple containers from the same repo in parallel without name collision.Usage
Design
${IMAGE_NAME}, ci.sh and other tools that grepdocker exec ${IMAGE_NAME}continue to work--instance NAME— project name + container name get-NAMEsuffix, fully isolated docker compose project (own network, volumes)compose.yamlusescontainer_name: ${IMAGE_NAME}${INSTANCE_SUFFIX:-}(template'sinit.sh-generated example updated; existing 17 consumer repos need a one-line edit before--instanceworks there)./run.sh(foreground devel) refuses if a container with the default name is already running. Caller must explicitly./stop.shor use--instance NAMEstop.sh --all— enumerates all compose projects matching${DOCKER_HUB_USER}-${IMAGE_NAME}*via docker labels and downs eachTest plan
Note for consumer repos
Existing 17 repos must update
compose.yaml:Backward compatible — default behavior unchanged until they upgrade.
🤖 Generated with Claude Code