Mitchell-JohnsonandClaude Opus 5
8a7167bf03
Users -> Guest logins makes a throwaway user name and password, good for half an hour by default, to hand to somebody who wants to see the console. It is a normal account with `guest: true` and an expiry, so login, sessions and the saved look need no special case, and it is left out of the account list, out of "the last account can't be removed", and out of the one account an empty user name means. What a guest may do is one allow-list, checked in the auth middleware, rather than a flag ~190 handlers have to remember. The list is matched by asking the router which handler a request would reach, so it cannot drift from the routes it names, and it is checked against the scoped path — /api/nodes/grid/procs is /api/procs on grid — because the hub proxies to a node with a token that is full control of that node. The node cannot tell a guest from its owner, so the only place it can be stopped is here, before the request leaves. A guest gets the dashboard, containers, stacks, disks, hardware, ZFS and usage, on this machine and on any managed one, and nothing else: no terminal (attaching is a GET, and it is a root shell), no files, no container logs or environments, no stack files, no alert channels, no cron, no tokens, no settings, no power. Expiry is enforced on every request and swept once a minute, so a console left open on a visitor's phone stops within the minute rather than at their next click; revoking signs them out at once. The console hides what a guest cannot use and says how long is left where the power button would be. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
101 lines
6.2 KiB
Markdown
101 lines
6.2 KiB
Markdown
# Ham Lab
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Web-based Linux management console for bare-metal Linux, in the style of the Proxmox
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web UI. Named after Ham the cat (see also HamTV).
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Status: **v0.1** — persistent web terminals and a live Dashboard tab. Scope and roadmap in
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[`PLAN.md`](PLAN.md).
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## Runs on any Linux box
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One static Go binary with the UI embedded: no cgo, no libc, no Node at runtime, no agents.
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The same file runs on Debian, Ubuntu, Fedora, RHEL/Rocky/Alma, openSUSE, Arch and Alpine
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(musl), on bare metal, VMs and containers. Builds: `amd64`, `arm64`, `arm` (ARMv6
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hard-float and up, so every Raspberry Pi), `386`, `riscv64`.
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```sh
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sudo ./hamlab-linux-amd64 install # that's the whole install
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```
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or, from wherever `make release` output is served:
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```sh
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curl -fsSL https://git.bigham.dev/mitchell/hamlab/releases/download/latest/install.sh | sh # asks: user, address, HTTPS, firewall, password
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curl -fsSL https://git.bigham.dev/mitchell/hamlab/releases/download/latest/install.sh | sh -s -- --yes # asks nothing, all defaults
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curl -fsSL https://git.bigham.dev/mitchell/hamlab/releases/download/latest/install.sh | sh -s -- --listen 0.0.0.0:8100 --tls auto # flags go to `hamlab install`
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```
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`install.sh` is a wizard when there is a terminal (it reads answers from `/dev/tty`, so it
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works piped from curl) and silent otherwise. Either way it picks the build for `uname -m`,
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checks it against `SHA256SUMS` and runs `hamlab install`; re-running it upgrades in place.
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`latest` is an alias Gitea resolves to the newest release, so that URL never changes.
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`make gitea-release` publishes a release there (`HAMLAB_URL` points the installer elsewhere); run the script beside the `hamlab-linux-*` files and it installs offline.
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`hamlab install`:
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- copies the binary to `/usr/local/bin` (`--prefix`), atomically;
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- gets root through `sudo` or `doas` if you aren't root already, and runs the console as
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**you** (`--user`), so terminals are your login shell with your rights;
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- writes the config to `~/.config/hamlab/` (`--data`; an existing `~/apps/hamlab/` is kept)
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and asks for the first account's password (the account is named after the user the
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console runs as), or generates one and prints it once (`--password-stdin` for scripts);
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- registers a boot-time service with **systemd** or **OpenRC**, naming only groups that
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exist on the host, and waits for `/healthz`; with neither init it prints the one line
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to put under your own supervisor;
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- says so when firewalld or ufw will block the port (`--open-firewall` opens it).
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Re-running it upgrades in place and keeps config, user and accounts. `hamlab uninstall
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[--purge]` reverses it.
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Accounts: every person has their own user name and password, and the theme, accent
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colours and dashboard layout follow the account. The **Users** tab has it all: your own
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password, where you are signed in (sign out any device), and the accounts (add, remove,
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reset a password; your own password confirms the last two). From the shell:
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`hamlab passwd [user]` sets a password and makes the account if it is new, `hamlab
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users` lists them, `hamlab user-rm <user>` removes one. Machine settings — refresh rate,
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graph history, alert rules — stay the machine's and are shared by everyone.
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**Guest logins**, for showing somebody the console: Users → Guest logins makes a
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throwaway user name and password, good for half an hour by default, and hands you the
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pair to paste into a message. A guest sees the dashboard, the containers, the disks, the
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hardware and the machines this hub manages, and can change none of it — no terminal, no
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files, no logs or container environments, no settings, no power. It can be revoked in one
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tap, and it disappears on its own when the time is up, wherever it is signed in. What a
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guest may reach is a list of routes in `internal/api/guests.go`, so a route added later
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is shut to guests until somebody says otherwise.
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What adapts to the host, rather than assuming Debian:
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| Root | already root, else passwordless `sudo`, else passwordless `doas`; without any, the console is read-only where root is needed and says so |
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| Updates tab | apt, dnf, zypper, pacman, apk: list, refresh, upgrade, install (pacman: all or nothing) |
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| Services / timers | systemd of any age (JSON output where it exists, the plain table before v246); a clear message on hosts without systemd |
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| Disks | `lsblk`, or `/sys/block` when it's missing (busybox) or too old; SMART and ZFS only when their tools are there |
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| Dashboard | `/proc` and `/sys` only: hwmon or thermal-zone temps, fans, NICs, disks, mounts; empty sections where the hardware has nothing to report. UPS from whichever of `pwrstat`, NUT (`upsc`) or `apcupsd` is installed |
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| Listen address | bound with `IP_FREEBIND`, so a LAN address that isn't up yet at boot doesn't fail the start |
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| Self-update | the new build must run and load this host's config before it replaces the old one; atomic rename; the daemon then re-execs itself, so it restarts the same way under systemd, OpenRC or nothing; `hamlab.prev` kept |
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Building: `make build` (web + Go), `make release` (every architecture, `install.sh` and
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`SHA256SUMS` in `dist/`), `make test`.
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Terminals run as the user the service runs as, with that user's login shell.
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## Managing several machines
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Install Ham Lab on each host; on the ones the hub should reach:
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`hamlab install --listen <lan-ip>:8100 --tls auto` (a self-signed certificate is generated
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on first start). Then on the hub, open **Machines**, enter a name, the address
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(`https://host:8100`) and a user and password on that machine once (the user may be
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left out when it has only one). The hub pins the
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certificate, keeps an access token, and every tab works against the chosen machine
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through the switcher at the top of the rail.
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Updating: `make deploy` on the hub installs the new build there and then pushes it to
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every managed machine (`hamlab push-nodes`), which install it and restart. The Machines
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page flags machines running an older version and offers the same push per machine.
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Mixed architectures are fine: `make deploy` also cross-compiles every other architecture,
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and the hub sends each machine the build for its own.
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- On `core` it is public at `https://hamlab.bigham.dev` behind Nginx Proxy Manager.
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- Installable as a PWA.
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