183 lines
10 KiB
Markdown
183 lines
10 KiB
Markdown
# `thothctl pi` lifecycle contract
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`thothctl` is the only component that drives Docker lifecycle operations. The `core` container
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does not mount a Docker socket, and Pi is never updated in a running container.
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## Inspection and configuration
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```text
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thothctl --installation /absolute/path/thothii-installation.yaml pi status
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thothctl --installation /absolute/path/thothii-installation.yaml pi doctor
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thothctl --installation /absolute/path/thothii-installation.yaml pi test
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thothctl --installation /absolute/path/thothii-installation.yaml pi logs
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thothctl --installation /absolute/path/thothii-installation.yaml pi configure
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```
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`status` executes the image-bundled `pi --version`. `doctor` compares that value with both the
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container's `PI_VERSION` contract and the `io.thothii.pi.version` image label; a merely nonempty
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version is not sufficient. `doctor` and `test` also require a healthy core, a successful Pi smoke,
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valid settings, and an exact selected provider/model pair from the backend's available model
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entries. `pi check` remains an alias for `pi test`. Logs are always a bounded, sanitized 200-line
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snapshot; there is no follow mode.
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On a TTY, `pi configure` presents numbered provider, model, and thinking choices. Providers and
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models come from the backend's closed model list, and the model choices are restricted to the
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selected provider. In non-interactive use, all choices must be explicit:
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```text
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thothctl --installation /absolute/path/thothii-installation.yaml pi configure \
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--provider zai --model glm-5.2 --thinking medium
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```
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The helper snapshots exact settings-file existence and raw bytes, applies the new values atomically,
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and verifies the readback and rendered-configuration digest. A helper, readback, or digest failure
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restores those exact bytes when the prior file existed; on a clean installation it removes the new
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file and verifies the absent/default state. Empty prior files are supported. The command reports
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the actual host path from `PI_AUTH_FILE`; credentials remain in that protected host file and must
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never be passed as flags.
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Installation-managed Pi provider/model configuration is declarative only. Any JSON value beginning
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with `!` is rejected recursively in the complete `models.json` before it can supply management
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choices, and the exact selected provider/model and credential payload is checked again before the
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isolated smoke files are written. The API returns only the fixed
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`Pi provider/model configuration is invalid` message; rejected commands, paths, and secrets are
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never included. Use `$NAME`/`${NAME}` environment references in `models.json`, or omit `apiKey` and
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provide the selected credential through the protected `PI_AUTH_FILE`, `THT_MODEL_API_KEY_FILE`, or
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`THT_SECRETS_FILE` contract. A literal leading exclamation mark uses Pi's `$!` escape. Direct
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secret-file references are not a `models.json` feature: ThothII converts its managed key source to
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the provider-native child environment, while `PI_AUTH_FILE` is mounted as Pi's protected credential
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store.
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## Supported Compose entry points and current image
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Use `thothctl start`, `stop`, `status`, `logs`, and `doctor` for ordinary installation lifecycle
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operations. All `thothctl` Compose commands automatically include the installation-specific
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durable selector when it exists:
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```text
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<projectDirectory>/.thothctl/<installation-id>/current-image.yaml
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```
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This selector is part of the supported installation state: it keeps a verified Pi image selected
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across a fresh `thothctl` process, stop/start, reconcile, and source checkout whose base image is
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digest-pinned. Do not delete or hand-edit it. Direct raw `docker compose` lifecycle commands bypass
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this protection and are unsupported. Advanced documented Compose rendering must use
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`scripts/compose-with-preflight.sh` and include the same selector with `-f` when present; connector
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secret overrides must never bypass that preflight wrapper.
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## Updating Pi
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Every update requires a pinned version, an explicit source, and confirmation:
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```text
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thothctl --installation /absolute/path/thothii-installation.yaml pi update \
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--version 0.81.0 --source build --yes
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thothctl --installation /absolute/path/thothii-installation.yaml pi update \
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--version 0.81.0 --source pull \
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--image registry.example.invalid/thothii-core@sha256:<64-lowercase-hex-digits> --yes
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```
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`--source build` rebuilds only `core` with `PI_VERSION=<version>`. `--source pull` requires an
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immutable digest reference; mutable tags, URL forms, and credential-bearing references are
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rejected. `--source` is never inferred.
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Before inventory, update activates the durable maintenance gate. Activation writes
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`/data/settings/maintenance.json` in the mounted settings volume, closes admission, and waits for
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all leases. A recreated candidate reads that marker at startup and therefore starts gated. The
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loopback-only control endpoints cannot be reached through the frontend proxy and do not depend on
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the configured authentication principal mode. Lost activation/deactivation responses are resolved
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by querying gate status only when the original result is unknown. An explicit file or directory
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durability failure is never converted to success by matching readback: the control API reports
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`maintenance_durability_failed`, keeps or restores the safest durable marker state, and requires
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recovery.
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Open, unarchived sessions stop an update. After an operator has completed or otherwise drained
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their work, `--drain` makes the command poll the authenticated bare-array
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`GET /sessions?scope=all` response until no active sessions remain.
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The configured `core.image` is never retagged or mutated. Each installation transaction creates
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unique candidate and previous tags, including when two installations share a configured tag or
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the configured image is digest-pinned. A temporary lifecycle-only Compose override selects those
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tags for build, recreate, and rollback. Candidate build, pull, or candidate-tag failures happen
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before `mutation_started` and therefore never recreate or roll back core. After verification, the
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temporary candidate selector is atomically promoted to the durable current-image override.
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Rollback atomically promotes the previous selector. Terminal cleanup removes only transaction
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files and never deletes the durable selector.
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Only `core` is recreated, with `--no-deps --force-recreate`; `frontend` is not recreated and no
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volume-replacement flags are used. Verification checks health; exact requested Pi version at all
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three declared boundaries (the candidate executable, `PI_VERSION` environment, and
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`org.opencontainers.image.version` image label); the provider/model/settings smoke; unchanged
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non-secret rendered configuration; and the complete persistence-mount fingerprint.
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## Recovery, rollback, and maintenance cleanup
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Recovery state and lock diagnostics live under:
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```text
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<projectDirectory>/.thothctl/<installation-id>/update-state.json
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<projectDirectory>/.thothctl/<installation-id>/update-state.json.lock.owner.json
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```
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The recovery file is mode `0600` and records transaction-scoped image identities, mount
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fingerprints, target version/source, configuration digest, phase, and timestamp. It contains no
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credentials, endpoint values, secret paths, Compose output, or logs. A cross-platform OS advisory
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file lock serializes lifecycle operations; a crashed owner releases the lock automatically. Owner
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metadata is diagnostic only and cannot wedge acquisition if empty, partial, or stale.
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Any post-candidate failure explicitly confirms or reactivates maintenance and rescans sessions
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before compensation. Automatic rollback selects the transaction's previous image through the
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lifecycle override and clears maintenance only after the previous image, configuration, mounts,
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health, Pi smoke, and terminal recovery write are verified. Ambiguous compensation remains gated.
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If the candidate core is stopped and cannot serve the maintenance endpoint, rollback proves that
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state with Compose and writes the marker through a one-off previous-image `core` container sharing
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the settings volume. It does not require the failed candidate, a host Node runtime, or the Docker
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socket inside a container. The restored core is then recreated, verified, and rescanned before the
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gate can open.
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For an interrupted transaction, first run:
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```text
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thothctl --installation /absolute/path/thothii-installation.yaml pi rollback --yes
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```
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Inspect and clean a stale durable gate with:
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```text
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thothctl --installation /absolute/path/thothii-installation.yaml pi maintenance status
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thothctl --installation /absolute/path/thothii-installation.yaml pi maintenance recover --yes
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```
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`maintenance recover` completes an interrupted verified-image promotion, safely finalizes a
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preparation interrupted before core mutation, and refuses other pending mutations. For terminal or
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absent recovery state, it removes only a stale transaction override, verifies the running
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installation when the gate is active, and only then removes the durable marker and reopens
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admission. It never removes `current-image.yaml`. If rollback or recovery fails, leave the marker
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in place, preserve `update-state.json`, repair the reported Docker/configuration issue, and rerun
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rollback or maintenance recovery.
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Missing confirmation, invalid arguments, active sessions, and an interrupted transaction exit
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`2`. Docker and verification failures exit nonzero with concise, redacted guidance. Direct
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read-only/log commands preserve the original Docker child exit code.
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## Go dependency security boundary
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The supported toolchain is Go `1.26.5`, released 2026-07-07, with module language version
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`1.26.0`. The Docker builder is pinned by both patch tag and the multi-platform manifest-list
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digest:
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```text
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golang:1.26.5-bookworm@sha256:1ecb7edf62a0408027bd5729dfd6b1b8766e578e8df93995b225dfd0944eb651
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```
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That manifest provides both `linux/amd64` and `linux/arm64/v8` builders. Go's official release
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history is the authority for the patch level (`https://go.dev/doc/devel/release`); the Docker
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Official Image is the authority for the builder (`https://hub.docker.com/_/golang`).
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`golang.org/x/sys`, used by the Windows durable-replace implementation, is pinned to `v0.47.0`.
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The directly used `github.com/sirupsen/logrus` is pinned to `v1.9.1`, which removes
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GO-2025-4188 from the imported package set. The build contract verifies the exact toolchain,
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dependencies, digest, and all five supported target builds (Windows amd64, Darwin amd64/arm64, and
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Linux amd64/arm64). `go mod verify`, tests including the race detector, `go vet`, and
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`govulncheck` are release gates.
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