feat(proxy): add SSH TCP passthrough and graceful HTTP-only startup

Add optional [ssh] config block that proxies port 22 → Gitea SSH pod,
running on a dedicated thread/runtime matching the cert-watcher pattern.

Also start HTTP-only on first deploy when the TLS cert file doesn't exist
yet — once ACME challenge completes and the cert watcher writes the file,
a graceful upgrade adds the TLS listener without downtime.

Fix ACME watcher to handle InitApply events (kube-runtime v3+) so
Ingresses that existed before the proxy started are picked up correctly.

Signed-off-by: Sienna Meridian Satterwhite <sienna@sunbeam.pt>

src/acme.rs

@@ -43,7 +43,10 @@ pub async fn watch_ingresses(client: Client, routes: AcmeRoutes) {
 
     while let Some(result) = stream.next().await {
         match result {
-            Ok(watcher::Event::Apply(ing)) => {
+            // InitApply fires for each Ingress during the initial list (kube v3+).
+            // Apply fires for subsequent creates/updates.
+            // Both must be handled to catch Ingresses that existed before the proxy started.
+            Ok(watcher::Event::InitApply(ing)) | Ok(watcher::Event::Apply(ing)) => {
                 let mut map = routes.write().unwrap_or_else(|e| e.into_inner());
                 upsert_routes(&ing, &mut map);
             }

src/config.rs

@@ -2,12 +2,22 @@ use anyhow::{Context, Result};
 use serde::Deserialize;
 use std::fs;
 
+#[derive(Debug, Deserialize, Clone)]
+pub struct SshConfig {
+    /// Address to bind the SSH listener on, e.g. "0.0.0.0:22".
+    pub listen: String,
+    /// Upstream backend address, e.g. "gitea-ssh.devtools.svc.cluster.local:2222".
+    pub backend: String,
+}
+
 #[derive(Debug, Deserialize, Clone)]
 pub struct Config {
     pub listen: ListenConfig,
     pub tls: TlsFileConfig,
     pub telemetry: TelemetryConfig,
     pub routes: Vec<RouteConfig>,
+    /// Optional SSH TCP passthrough (port 22 → Gitea SSH).
+    pub ssh: Option<SshConfig>,
 }
 
 #[derive(Debug, Deserialize, Clone)]

src/lib.rs

@@ -4,3 +4,4 @@
 pub mod acme;
 pub mod config;
 pub mod proxy;
+pub mod ssh;

src/main.rs

@@ -86,13 +86,43 @@ fn main() -> Result<()> {
     };
     let mut svc = http_proxy_service(&server.configuration, proxy);
 
-    // Port 80: plain HTTP — 301 → HTTPS, except for ACME HTTP-01 challenges.
+    // Port 80: always serve plain HTTP (ACME challenges + redirect to HTTPS).
-    // Port 443: TLS-terminated HTTPS.  Cert written to /etc/tls/ by cert::* above.
     svc.add_tcp(&cfg.listen.http);
-    svc.add_tls(&cfg.listen.https, &cfg.tls.cert_path, &cfg.tls.key_path)?;
+
+    // Port 443: only add the TLS listener if the cert files exist.
+    // On first deploy cert-manager hasn't issued the cert yet, so we start
+    // HTTP-only.  Once the pingora-tls Secret is created (ACME challenge
+    // completes), the watcher in step 6 writes the cert files and triggers
+    // a graceful upgrade.  The upgrade process finds the cert files and adds
+    // the TLS listener, inheriting the port-80 socket from the old process.
+    let cert_exists = std::path::Path::new(&cfg.tls.cert_path).exists();
+    if cert_exists {
+        svc.add_tls(&cfg.listen.https, &cfg.tls.cert_path, &cfg.tls.key_path)?;
+        tracing::info!("TLS listener added on {}", cfg.listen.https);
+    } else {
+        tracing::warn!(
+            cert_path = %cfg.tls.cert_path,
+            "cert not found — starting HTTP-only; ACME challenge will complete and trigger upgrade"
+        );
+    }
 
     server.add_service(svc);
 
+    // 5b. SSH TCP passthrough (port 22 → Gitea SSH), if configured.
+    // Runs on its own OS thread + Tokio runtime — same pattern as the cert/ingress watcher.
+    if let Some(ssh_cfg) = &cfg.ssh {
+        let listen = ssh_cfg.listen.clone();
+        let backend = ssh_cfg.backend.clone();
+        tracing::info!(%listen, %backend, "SSH TCP proxy enabled");
+        std::thread::spawn(move || {
+            let rt = tokio::runtime::Builder::new_multi_thread()
+                .enable_all()
+                .build()
+                .expect("ssh proxy runtime");
+            rt.block_on(sunbeam_proxy::ssh::run_tcp_proxy(&listen, &backend));
+        });
+    }
+
     // 6. Background K8s watchers on their own OS thread + tokio runtime so they
     //    don't interfere with Pingora's internal runtime.  A fresh Client is
     //    created here so its tower workers live on this runtime (not the

src/ssh.rs

@@ -0,0 +1,41 @@
+use tokio::io::copy_bidirectional;
+use tokio::net::{TcpListener, TcpStream};
+
+/// Listens on `listen` and proxies every TCP connection to `backend`.
+/// Runs forever; intended to be spawned on a dedicated OS thread + Tokio runtime,
+/// matching the pattern used for the cert/ingress watcher.
+pub async fn run_tcp_proxy(listen: &str, backend: &str) {
+    let listener = match TcpListener::bind(listen).await {
+        Ok(l) => {
+            tracing::info!(%listen, %backend, "SSH TCP proxy listening");
+            l
+        }
+        Err(e) => {
+            tracing::error!(error = %e, %listen, "SSH TCP proxy: bind failed");
+            return;
+        }
+    };
+
+    loop {
+        match listener.accept().await {
+            Ok((mut socket, peer_addr)) => {
+                let backend = backend.to_string();
+                tokio::spawn(async move {
+                    match TcpStream::connect(&backend).await {
+                        Ok(mut upstream) => {
+                            if let Err(e) = copy_bidirectional(&mut socket, &mut upstream).await {
+                                tracing::debug!(error = %e, %peer_addr, "ssh: session ended");
+                            }
+                        }
+                        Err(e) => {
+                            tracing::error!(error = %e, %peer_addr, %backend, "ssh: upstream connect failed");
+                        }
+                    }
+                });
+            }
+            Err(e) => {
+                tracing::error!(error = %e, "ssh: accept failed");
+            }
+        }
+    }
+}