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Add tailscale-proxy stack + Grafana dashboard

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New stack tailscale-proxy: a LAN HTTP proxy (192.168.0.35:3128) that egresses
through the dedicated Hetzner Tailscale exit node fedora-technohim, so proxied
LAN clients appear on the internet as 89.167.72.79 without routing the docker
host itself through the tunnel.

- ts-proxy: Tailscale in userspace mode (--exit-node=100.121.234.85), exposing a
  SOCKS5 proxy on :1055. Userspace mode makes no host route/firewall changes.
- tinyproxy: LAN-facing forward proxy on :3128 (Allow 192.168.0.0/22), upstream
  socks5 to ts-proxy. Access log shipped to Alloy/Loki via the syslog
  log-driver (tag tailscale-proxy).

The Tailscale auth key stays outside Git in /mnt/containers/tailscale-proxy/
ts.env (0600); node state persists in the state/ dir. tinyproxy.conf is tracked
here as source of truth. See tailscale-proxy/README.md.

Also adds logging/grafana-dashboards/tailscale-proxy.json: a Loki dashboard
(request rate by method, top destinations, top clients, totals, live access
log) built from the tinyproxy syslog stream, matching the existing dashboards'
schemaVersion 39 + ${datasource} template-var pattern.

Full build record in ops-knowledge
diagnostics/2026-07-23-02-tekhnohim-docker-tailscale-exit-proxy-stack.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
pipistrello
2026-07-23 16:43:43 +03:00
co-authored by Claude Opus 4.8
parent 7ebe9f2a7e
commit 46bb775939
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# Tailscale exit-node LAN proxy
LAN HTTP proxy that egresses through the dedicated Hetzner Tailscale exit node,
so proxied clients appear on the internet as `89.167.72.79` without routing the
docker host itself through the tunnel.
- client endpoint: `192.168.0.35:3128/tcp` (HTTP/HTTPS forward proxy);
- `tinyproxy` accepts LAN clients (`Allow 192.168.0.0/22`) and forwards upstream
over SOCKS5 to the Tailscale container;
- `ts-proxy` runs Tailscale in **userspace** mode and sends outbound traffic
through the exit node `fedora-technohim` (`100.121.234.85`);
- userspace mode adds **no host route/firewall changes** — the docker host's own
services (NPM, KMS, IPsec) keep egressing via the normal gateway;
- tinyproxy's access log ships to the logging stack (Alloy → Loki) via the
syslog log-driver (`tag: tailscale-proxy`); the Grafana dashboard
`logging/grafana-dashboards/tailscale-proxy.json` visualises it.
The stack deliberately keeps credential-bearing / stateful files outside Git:
| Host path | Purpose | Required mode |
|---|---|---|
| `/mnt/containers/tailscale-proxy/ts.env` | `TS_AUTHKEY=<tailscale auth key>` | `0600`, owner `root:root` |
| `/mnt/containers/tailscale-proxy/state/` | Tailscale node state (persists identity across restarts) | dir, owner `root:root` |
| `/mnt/containers/tailscale-proxy/tinyproxy.conf` | tinyproxy config (also tracked in this directory as the source of truth) | `0644` |
Before deploying: create `ts.env` on the host with a Tailscale auth key, and in
the Tailscale admin console approve the exit node and allow this node to use it.
Deploy this directory as a Portainer Git stack named `tailscale-proxy`, or run it
with Docker Compose using project name `tailscale-proxy`. The absolute
configuration files must already exist on the host before deployment.
Full build record and rationale (userspace vs TUN dead-ends, SOCKS5-vs-HTTP,
monitoring) is in ops-knowledge:
`diagnostics/2026-07-23-02-tekhnohim-docker-tailscale-exit-proxy-stack.md`.