hive-priv: fetch the swarm signature from attic before verifying a locally valid closure
This commit is contained in:
atlas
parent
3550cc0e1b
commit
c25cf3d48a
1 changed files with 393 additions and 51 deletions
|
|
@ -28,36 +28,36 @@ for every operation that genuinely requires root.
|
|||
**Narrow interface** — `PrivRequest` variants map 1:1 to specific
|
||||
known operations; there is no arbitrary command pass-through:
|
||||
|
||||
| Operation | What it runs |
|
||||
| ------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
|
||||
| `StartContainer` / `StopContainer` | `nixos-container start/stop <name>` |
|
||||
| `KillContainer` | `machinectl kill <machine> --signal=SIGKILL` (`nixos-container` has no kill verb) |
|
||||
| `StartFailureLog` | `journalctl _SYSTEMD_UNIT=container@h-<name>.service --since @<t> -n 30 -o cat --no-pager`, fixed argv, 5 s timeout, output capped at 8 KiB; hive-priv clamps `<t>` to the last hour. hive-c0re appends the lines to the failed start's build log, which only the dashboard serves. |
|
||||
| `CreateContainer` / `UpdateContainer` | `nixos-container create <name> --system-path <toplevel>`; for an update, `nix-env -p <profile> --set <toplevel>` and a reload of the unit. `<toplevel>` must already be in the store with a signature by the swarm cache's key: hive-priv runs `nix store verify --no-contents --sigs-needed 1` with `trusted-public-keys` set to the key in root-owned `/run/hyperhive-priv/attic/public-key`, and refuses a path that's absent or that the key didn't sign. hive-priv builds nothing. The check doesn't bind the path to the agent whose pull produced it: hive-c0re could already pull any swarm-signed path and apply it to any agent, so the check bounds the same risk (one agent gets another's closure), not an arbitrary-path one |
|
||||
| `RealiseClosure` | Kept for one release, for an older hive-c0re that still asks hive-priv to download. Downloads nothing: answers `Ok` when the path is in the store and signed by the swarm key (what `CreateContainer` needs), else `not available: <reason>`. The path must be `/nix/store/<32 chars>-<name>` and the agent name valid |
|
||||
| `RefreshCacheFacts` | `systemctl start hive-priv-cache-facts.service`, waited for up to 60 s. The request names no unit and has no field. hive-c0re asks for it when the fragment is missing or lacks a setting |
|
||||
| `DestroyContainer` | `nixos-container destroy <name>` |
|
||||
| `ListContainers` | `nixos-container list` |
|
||||
| `ReloadGatewayNginx` | `systemctl reload/start/reset-failed nginx` (host unit; the unit name is hard-coded, not a parameter) |
|
||||
| `WriteNspawnFlags` | write `/etc/nixos-containers/<container>.conf` (bind-mount list, network isolation vars, and `--ephemeral` after the root's salvage). hive-priv first copies a stopped container's root to the agent's `work/`, then renames it aside (it deletes nothing), following no link the container could have planted; for an agent whose closure record sets `private_users` it also adds `--private-users=pick`, mounts every bind `owneridmap`, and once chowns the agent's `state`, `harness`, `work` and `claude` dirs (never `config`, following no link) to the data owner |
|
||||
| `EnsureAgentSocketDir` | `mkdirat` `/run/hive-agent/<name>` `0751 root:root` under an `O_NOFOLLOW` parent fd; leaves an existing directory alone, refuses anything else; for an agent whose closure record sets `private_users` it then chowns the dir to the data owner |
|
||||
| `WriteResourceLimits` | write `CPUQuota=`/`MemoryMax=`/`CPUWeight=`/`IOWeight=` systemd drop-in for agent container, with an `ExecStartPre=` that runs `hive-priv check-rootfs <container>` (no-follow check of the root paths the start script touches; see persistence.md), and a GC root on the build it names |
|
||||
| `RemoveServiceDropin` | remove `container@<name>.service.d/` drop-in on destroy, and the GC root of the hive-priv build it named |
|
||||
| `DaemonReload` | `systemctl daemon-reload` |
|
||||
| `ControlInfraContainer` | `systemctl <action> nginx.service` for the gateway — the `InfraContainer` enum is the allowlist, and serde rejects unknown names at the wire boundary (`hive-c0re`, the forge and the matrix have no variant, so no request can name them) |
|
||||
| `SyncAgentTmpfiles` | unlink `/etc/tmpfiles.d/hyperhive-agents.conf` and return `Ok` |
|
||||
| `SetAgentPaused` | create / remove the `<state>/<name>/harness/paused` marker that parks an agent's turn loop |
|
||||
| `EnsureAgentSubvolume` | `btrfs subvolume create <state>/<name>` for a new agent — no-op when the path exists or the filesystem isn't btrfs |
|
||||
| `UpgradeAgentSubvolume` | migrate an existing plain state dir into a subvolume: create, `cp -a --reflink=auto`, atomic swap. Operator opt-in, and the caller stops the agent first |
|
||||
| `DeleteAgentSubvolume` | `btrfs subvolume delete <state>/<name>` — purge path only, never a plain destroy |
|
||||
| `EnsureBtrfsQuota` | `btrfs quota enable <AGENT_STATE_ROOT>`. Operator opt-in — enabling forces a full rescan |
|
||||
| `ReadSubvolumeUsage` | `btrfs qgroup show -f --raw <state>/<name>` |
|
||||
| `SetSubvolumeQuota` | `btrfs qgroup limit <bytes\|none> <state>/<name>` |
|
||||
| `MeasureAgentDisk` | `du -s -x -b -c -P` over `<state>/<name>/state`, `<state>/<name>/work` and `/var/lib/nixos-containers/h-<name>`, killed after 10 min. hive-priv derives the paths from the name; the request carries none |
|
||||
| `SnapshotAgentSubvolume` | `btrfs subvolume snapshot -r <agent_root> <snapshot_path>` — the frozen point-in-time copy a migration streams from |
|
||||
| `DeleteAgentSnapshot` | `btrfs subvolume delete <snapshot_path>` |
|
||||
| `SendAgentSnapshotToFile` | `btrfs send [-p <parent>] <snapshot>` into a bare filename under `MIGRATE_STAGING_ROOT`; refuses to overwrite an existing export |
|
||||
| `SendAgentSnapshotToFd` | `btrfs send [-p <parent>] <snapshot>` into a **file descriptor passed with the request** (`SCM_RIGHTS`). hive-c0re connects to the peer and hands over the connected socket, so hive-priv never learns an address or protocol. hive-priv requires exactly one descriptor here, and refuses one that arrives alongside any other operation |
|
||||
| Operation | What it runs |
|
||||
| ------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
||||
| `StartContainer` / `StopContainer` | `nixos-container start/stop <name>` |
|
||||
| `KillContainer` | `machinectl kill <machine> --signal=SIGKILL` (`nixos-container` has no kill verb) |
|
||||
| `StartFailureLog` | `journalctl _SYSTEMD_UNIT=container@h-<name>.service --since @<t> -n 30 -o cat --no-pager`, fixed argv, 5 s timeout, output capped at 8 KiB; hive-priv clamps `<t>` to the last hour. hive-c0re appends the lines to the failed start's build log, which only the dashboard serves. |
|
||||
| `CreateContainer` / `UpdateContainer` | `nixos-container create <name> --system-path <toplevel>`; for an update, `nix-env -p <profile> --set <toplevel>` and a reload of the unit. `<toplevel>` must already be in the store with a signature by the swarm cache's key: hive-priv first runs `nix store copy-sigs --store daemon` for that path from the cache named in `/run/hyperhive-nix/cache.conf`, with the netrc beside it, which imports the cache's signature for a path that was already in the store (on a failure it logs a warning and the check goes on); it then runs `nix store verify --no-contents --sigs-needed 1` with `trusted-public-keys` set to the key in root-owned `/run/hyperhive-priv/attic/public-key`, and refuses a path that's absent or that the key didn't sign. hive-priv builds nothing. The check doesn't bind the path to the agent whose pull produced it: hive-c0re could already pull any swarm-signed path and apply it to any agent, so the check bounds the same risk (one agent gets another's closure), not an arbitrary-path one |
|
||||
| `RealiseClosure` | Kept for one release, for an older hive-c0re that still asks hive-priv to download. Downloads nothing: answers `Ok` when the path is in the store and signed by the swarm key (what `CreateContainer` needs), else `not available: <reason>`. The path must be `/nix/store/<32 chars>-<name>` and the agent name valid |
|
||||
| `RefreshCacheFacts` | `systemctl start hive-priv-cache-facts.service`, waited for up to 60 s. The request names no unit and has no field. hive-c0re asks for it when the fragment is missing or lacks a setting |
|
||||
| `DestroyContainer` | `nixos-container destroy <name>` |
|
||||
| `ListContainers` | `nixos-container list` |
|
||||
| `ReloadGatewayNginx` | `systemctl reload/start/reset-failed nginx` (host unit; the unit name is hard-coded, not a parameter) |
|
||||
| `WriteNspawnFlags` | write `/etc/nixos-containers/<container>.conf` (bind-mount list, network isolation vars, and `--ephemeral` after the root's salvage). hive-priv first copies a stopped container's root to the agent's `work/`, then renames it aside (it deletes nothing), following no link the container could have planted; for an agent whose closure record sets `private_users` it also adds `--private-users=pick`, mounts every bind `owneridmap`, and once chowns the agent's `state`, `harness`, `work` and `claude` dirs (never `config`, following no link) to the data owner |
|
||||
| `EnsureAgentSocketDir` | `mkdirat` `/run/hive-agent/<name>` `0751 root:root` under an `O_NOFOLLOW` parent fd; leaves an existing directory alone, refuses anything else; for an agent whose closure record sets `private_users` it then chowns the dir to the data owner |
|
||||
| `WriteResourceLimits` | write `CPUQuota=`/`MemoryMax=`/`CPUWeight=`/`IOWeight=` systemd drop-in for agent container, with an `ExecStartPre=` that runs `hive-priv check-rootfs <container>` (no-follow check of the root paths the start script touches; see persistence.md), and a GC root on the build it names |
|
||||
| `RemoveServiceDropin` | remove `container@<name>.service.d/` drop-in on destroy, and the GC root of the hive-priv build it named |
|
||||
| `DaemonReload` | `systemctl daemon-reload` |
|
||||
| `ControlInfraContainer` | `systemctl <action> nginx.service` for the gateway — the `InfraContainer` enum is the allowlist, and serde rejects unknown names at the wire boundary (`hive-c0re`, the forge and the matrix have no variant, so no request can name them) |
|
||||
| `SyncAgentTmpfiles` | unlink `/etc/tmpfiles.d/hyperhive-agents.conf` and return `Ok` |
|
||||
| `SetAgentPaused` | create / remove the `<state>/<name>/harness/paused` marker that parks an agent's turn loop |
|
||||
| `EnsureAgentSubvolume` | `btrfs subvolume create <state>/<name>` for a new agent — no-op when the path exists or the filesystem isn't btrfs |
|
||||
| `UpgradeAgentSubvolume` | migrate an existing plain state dir into a subvolume: create, `cp -a --reflink=auto`, atomic swap. Operator opt-in, and the caller stops the agent first |
|
||||
| `DeleteAgentSubvolume` | `btrfs subvolume delete <state>/<name>` — purge path only, never a plain destroy |
|
||||
| `EnsureBtrfsQuota` | `btrfs quota enable <AGENT_STATE_ROOT>`. Operator opt-in — enabling forces a full rescan |
|
||||
| `ReadSubvolumeUsage` | `btrfs qgroup show -f --raw <state>/<name>` |
|
||||
| `SetSubvolumeQuota` | `btrfs qgroup limit <bytes\|none> <state>/<name>` |
|
||||
| `MeasureAgentDisk` | `du -s -x -b -c -P` over `<state>/<name>/state`, `<state>/<name>/work` and `/var/lib/nixos-containers/h-<name>`, killed after 10 min. hive-priv derives the paths from the name; the request carries none |
|
||||
| `SnapshotAgentSubvolume` | `btrfs subvolume snapshot -r <agent_root> <snapshot_path>` — the frozen point-in-time copy a migration streams from |
|
||||
| `DeleteAgentSnapshot` | `btrfs subvolume delete <snapshot_path>` |
|
||||
| `SendAgentSnapshotToFile` | `btrfs send [-p <parent>] <snapshot>` into a bare filename under `MIGRATE_STAGING_ROOT`; refuses to overwrite an existing export |
|
||||
| `SendAgentSnapshotToFd` | `btrfs send [-p <parent>] <snapshot>` into a **file descriptor passed with the request** (`SCM_RIGHTS`). hive-c0re connects to the peer and hands over the connected socket, so hive-priv never learns an address or protocol. hive-priv requires exactly one descriptor here, and refuses one that arrives alongside any other operation |
|
||||
|
||||
**Strings that reach root-loaded config** — `WriteResourceLimits` and
|
||||
`WriteNspawnFlags` copy request strings into a systemd drop-in and an env
|
||||
|
|
@ -106,7 +106,9 @@ the daemon accepts:
|
|||
substituters. `--max-jobs 0` forbids a build, so a path no substituter has
|
||||
fails.
|
||||
- `hive-priv` verifies. Before `CreateContainer` or `UpdateContainer` applies a
|
||||
toplevel, it runs `nix store verify --no-contents --sigs-needed 1` with
|
||||
toplevel, it first imports the cache's signature for that path with
|
||||
`nix store copy-sigs` (a path the host built carries none), then runs
|
||||
`nix store verify --no-contents --sigs-needed 1` with
|
||||
`trusted-public-keys` set to the key in the root file, and refuses a path that
|
||||
is absent or that the key didn't sign. The daemon's trusted keys also include
|
||||
the host's other caches, so this check is the one that counts only the swarm's.
|
||||
|
|
|
|||
Loading…
Reference in a new issue