cc-ci host: no tailscale; fail2ban; opencode UI public on 8443 with the LE wildcard
Operator 2026-09-07: the combined host stays off the tailnet. ssh is key-only (password + keyboard-interactive auth off), the opencode UI is served as oc.ci.commoninternet.net on 8443 — TLS from the CI server's *.ci.commoninternet.net ACME cert (new orchestrator-host option opencodeUiAcmeHost; nginx joins the acme group) behind the existing basic auth — and fail2ban watches sshd plus nginx's 401s (nginx-http-auth jail). tailscaled ordering dropped from the orchestrator units. README updated. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FqkQq3CDmFWcQ7u1LzoyRz
This commit is contained in:
Claude Fable 5.1
@@ -17,7 +17,7 @@
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systemd.services.cc-ci-loops = {
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description = "cc-ci Builder/Adversary loops + watchdog (launch.sh start)";
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wantedBy = [ "multi-user.target" ]; # enabled after workspace staged (Hetzner cutover)
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after = [ "network-online.target" "tailscaled.service" "claude-install.service" ];
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after = [ "network-online.target" "claude-install.service" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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# KillMode=process: this unit only LAUNCHES the tmux server, it does not own it. With the
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@@ -58,7 +58,7 @@
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systemd.services.cc-ci-orchestrator = {
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description = "cc-ci orchestrator (operator steering session) — agents.py up orchestrator";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-online.target" "tailscaled.service" "opencode-web.service" ];
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after = [ "network-online.target" "opencode-web.service" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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# KillMode=process: see the note on cc-ci-loops — a rebuild that merely touches this unit
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@@ -85,7 +85,7 @@
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# wantedBy multi-user.target) so it never runs on boot/activation — only on the schedule.
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systemd.services.cc-ci-upgrade-all = {
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description = "cc-ci weekly /upgrade-all run (recipe upgrade survey + PRs, never merges)";
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after = [ "network-online.target" "tailscaled.service" "claude-install.service" ];
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after = [ "network-online.target" "claude-install.service" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "oneshot"; # launch-upgrader.py spawns the cc-ci-upgrader tmux session and returns
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@@ -129,7 +129,7 @@
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# short-lived glm-5.2 agent that diagnoses the blockage and drives the run to a clean DONE.
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systemd.services.cc-ci-upgrade-supervisor = {
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description = "cc-ci hourly weekly-run supervisor (glm-5.2 — drives a stalled /upgrade-all to completion)";
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after = [ "network-online.target" "tailscaled.service" ];
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "oneshot"; # launch-supervisor.py check: gate now, spawn the agent into tmux, return
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@@ -34,15 +34,26 @@ in
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default = 8443;
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description = ''
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TLS port of the nginx front door for the opencode web UI. Not 443: on the combined host
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Traefik (docker swarm) owns 80/443. The port is not opened in the firewall, so it is
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reachable only over the trusted tailscale interface.
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Traefik (docker swarm) owns 80/443. The host decides whether to open it in the firewall.
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'';
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};
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opencodeUiHost = lib.mkOption {
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type = lib.types.str;
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default = "oc.commoninternet.net";
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description = "nginx server_name for the opencode web UI (self-signed, basic auth).";
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description = "nginx server_name for the opencode web UI (TLS + basic auth).";
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};
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opencodeUiAcmeHost = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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example = "ci.commoninternet.net";
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description = ''
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Name of a `security.acme.certs` entry whose certificate covers opencodeUiHost (the
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combined host has the *.ci.commoninternet.net wildcard). When set, nginx serves that
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certificate; when null, the self-signed pair /etc/nginx/oc-selfsigned.{crt,key} staged
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out of band is used.
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'';
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};
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};
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@@ -158,7 +169,7 @@ SSHCFG
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systemd.services.opencode-web = {
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description = "opencode web server for cc-ci agents";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-online.target" "tailscaled.service" "opencode-install.service" ];
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after = [ "network-online.target" "opencode-install.service" ];
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wants = [ "network-online.target" ];
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serviceConfig = {
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Type = "simple";
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@@ -177,12 +188,20 @@ SSHCFG
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path = [ pkgs.bash pkgs.coreutils pkgs.git pkgs.python3 pkgs.openssh pkgs.tmux pkgs.nettools ];
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};
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# ---- tailnet-only nginx front door for the opencode UI -------------------------------
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# Self-signed cert + basic auth, both created out of band (a store path would be world
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# readable) — see README "Secrets to stage". nginx FAILS TO START if they are missing.
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# /etc/nginx/oc-selfsigned.crt root:nginx 0644
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# ---- nginx front door for the opencode UI --------------------------------------------
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# TLS (LE via opencodeUiAcmeHost, else the self-signed pair below) + HTTP basic auth. The
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# opencode web UI has no auth of its own and can drive agent sessions, so the htpasswd is
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# mandatory. Files created out of band (a store path would be world readable) — nginx
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# FAILS TO START without them, and its config check runs as the nginx user:
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# /etc/nginx/oc-htpasswd root:nginx 0640 (`oc:<bcrypt>`; plaintext kept in /secrets)
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# /etc/nginx/oc-selfsigned.crt root:nginx 0644 (only when opencodeUiAcmeHost is null)
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# /etc/nginx/oc-selfsigned.key root:nginx 0640
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# /etc/nginx/oc-htpasswd root:nginx 0640 (`oc:<bcrypt>`; plaintext in /secrets)
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# Rotate the password with:
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# printf 'oc:%s\n' "$(mkpasswd -m bcrypt "$P")" > /etc/nginx/oc-htpasswd && systemctl reload nginx
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# nginx must be able to read the ACME-issued key (the acme group owns it).
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users.users.nginx.extraGroups = lib.mkIf (cfg.opencodeUiAcmeHost != null)
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[ config.security.acme.certs.${cfg.opencodeUiAcmeHost}.group ];
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services.nginx = {
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enable = true;
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recommendedProxySettings = true;
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@@ -190,8 +209,9 @@ SSHCFG
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listen = [ { addr = "0.0.0.0"; port = cfg.opencodeUiPort; ssl = true; } ];
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# onlySSL flags the vhost as SSL so the module renders ssl_certificate for the listener.
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onlySSL = true;
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sslCertificate = "/etc/nginx/oc-selfsigned.crt";
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sslCertificateKey = "/etc/nginx/oc-selfsigned.key";
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useACMEHost = cfg.opencodeUiAcmeHost;
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sslCertificate = lib.mkIf (cfg.opencodeUiAcmeHost == null) "/etc/nginx/oc-selfsigned.crt";
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sslCertificateKey = lib.mkIf (cfg.opencodeUiAcmeHost == null) "/etc/nginx/oc-selfsigned.key";
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basicAuthFile = "/etc/nginx/oc-htpasswd";
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locations."/" = {
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proxyPass = "http://127.0.0.1:4096";
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