alexei.dolgolyov
0bb52f9ec6
Create structured plan files with 12 phases covering the full implementation: scaffold, store, crypto, Docker/NPM clients, registry poller, webhook, deployer, API layer, SvelteKit frontend, embedding, and hardening.
53 lines
2.6 KiB
Markdown
53 lines
2.6 KiB
Markdown
# Phase 3: Docker Client
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**Status:** ⬜ Not Started
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**Parent plan:** [PLAN.md](./PLAN.md)
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**Domain:** backend
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## Objective
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Implement the Docker Engine API wrapper for container lifecycle management — pull images, inspect, create/start/stop/remove containers, and manage networks.
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## Tasks
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- [ ] Task 1: Create Docker client wrapper with socket connection (`/var/run/docker.sock`)
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- [ ] Task 2: Implement `PullImage(ctx, image, tag, authConfig)` — pull with optional registry auth
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- [ ] Task 3: Implement `InspectImage(ctx, image)` — extract EXPOSE ports, HEALTHCHECK, labels
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- [ ] Task 4: Implement `CreateContainer(ctx, config)` — create with name, image, env, ports, network, labels
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- [ ] Task 5: Implement `StartContainer(ctx, containerID)`, `StopContainer(ctx, containerID, timeout)`, `RemoveContainer(ctx, containerID, force)`
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- [ ] Task 6: Implement `RestartContainer(ctx, containerID, timeout)`
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- [ ] Task 7: Implement `ListContainers(ctx, filters)` — filter by labels to find managed containers
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- [ ] Task 8: Implement `EnsureNetwork(ctx, networkName)` — create network if not exists
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- [ ] Task 9: Implement `ConnectNetwork(ctx, networkID, containerID)` — attach container to network
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- [ ] Task 10: Add docker-watcher labels to all managed containers (`docker-watcher.project`, `docker-watcher.stage`, `docker-watcher.instance-id`)
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## Files to Modify/Create
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- `internal/docker/client.go` — Docker client wrapper, connection setup
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- `internal/docker/container.go` — container lifecycle operations
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- `internal/docker/image.go` — pull and inspect operations
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- `internal/docker/network.go` — network management
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## Acceptance Criteria
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- Client connects to Docker socket
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- Pull handles both public and authenticated registries
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- Image inspection extracts port, healthcheck, and label metadata
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- Container creation applies all config (env, ports, network, labels)
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- All operations return meaningful errors
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- Managed containers are identifiable via labels
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## Notes
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- Use `github.com/docker/docker/client` SDK
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- Container names should be deterministic: `dw-{project}-{stage}-{tag-sanitized}`
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- All containers should be on the shared network (e.g., `staging-net`)
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- Port mapping: container's EXPOSE port → random host port (Docker auto-assigns)
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- Auth config for private registries will come from the store (encrypted tokens)
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## Review Checklist
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- [ ] All tasks completed
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- [ ] Proper context propagation for cancellation
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- [ ] Resource cleanup (close client, remove failed containers)
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- [ ] No hardcoded values
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- [ ] Error messages include container/image identifiers
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## Handoff to Next Phase
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<!-- Filled in by the implementation agent after completing this phase. -->
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