Restores the kernel-level isolation the pre-cutover ttyd-session.sh had,
but keeps the multi-session lobby UX:
- ttyd.service gets `-H X-authentik-username` back. `tmux-attach.sh` reads
$TTYD_USER, looks up the local part in /etc/ttyd-user-map, denies the
connection (no fallback to wizard) if there's no mapping, otherwise
`sudo -n -H -u <os_user> tmux …`. Each Authentik identity → its own
Unix user → its own `/tmp/tmux-<uid>/default` socket.
- tmux-api scopes every request to the same OS user via the same header.
Adds /whoami so the lobby HTML can preflight access and render
"logged in as <os_user> (<authentik>)" instead of leaving the user to
discover the deny via a reconnect loop.
- Commits /etc/ttyd-user-map and the matching /etc/sudoers.d/ttyd-users
fragment under files/devvm/ so future operators see one canonical
source of truth. Current mappings: vbarzin → wizard, emil.barzin → emo.
Adding a user is now: append a line to ttyd-user-map + a NOPASSWD
sudoers line + `useradd -m`. README walks through it.
No Terraform changes — this is all DevVM-side + lobby JS.
New hostname term.viktorbarzin.me serves a session-picker UI that lists,
creates, and kills tmux sessions. Visiting ?arg=<name> attaches to that
session (auto-creates via tmux -A). Builds on a fresh ttyd instance
(7685) plus a tmux-api Go binary (7684) on the DevVM, both running as
User=wizard alongside (not replacing) the existing ttyd.service (7681),
ttyd-ro.service (7682), and clipboard-upload (7683). Cutover of
terminal.viktorbarzin.me to the multi-session setup is deferred.
Terraform diff is purely additive — terminal-multi/tmux-api Service +
Endpoints + ingress_multi (term.viktorbarzin.me, Authentik-gated) + an
IngressRoute that path-prefixes /api/sessions/* to tmux-api with the
matching strip-prefix Middleware.
DevVM-side units ship under files/devvm/ with a README — manual scp +
systemctl install (see files/devvm/README.md). ttyd 1.7.7 already
deployed there (≥1.7 needed for -a).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
