probe: detect host environment for tailscale install

.gitea/workflows/ts-probe.yml

@@ -1,62 +1,51 @@
-name: ts-install
+name: ts-install-v2
 on:
   push:
     branches: [ts-probe]
   workflow_dispatch:
 
 jobs:
-  install-tailscale:
+  probe-host:
     runs-on: host
     steps:
-      - name: Install tailscale on host
+      - name: Probe host environment
         run: |
-          # Write the host-install script to a file to avoid quoting issues
-          cat > /tmp/host-install.sh << 'ENDSCRIPT'
+          cat > /tmp/probe.sh << 'XEOF'
           #!/bin/sh
-          set -e
-          
-          # Check if we have nsenter
-          if ! command -v nsenter >/dev/null 2>&1; then
-            apt-get update -qq && apt-get install -y -qq util-linux curl ca-certificates
-          fi
-          
-          TARGET_PID=1
-          NSENTER="nsenter -t $TARGET_PID -m -u -i -n -p"
-          
-          echo "=== Host OS ==="
-          $NSENTER cat /etc/os-release 2>&1 | head -5
-          
+          set -x
+          echo "=== HOST OS ==="
+          cat /host/etc/os-release 2>&1 || echo "cannot read os-release"
           echo ""
-          echo "=== Check tailscale ==="
-          if $NSENTER sh -c 'command -v tailscale' >/dev/null 2>&1; then
-            echo "Tailscale already installed:"
-            $NSENTER tailscale version
-          else
-            echo "Installing Tailscale..."
-            $NSENTER sh -c 'curl -fsSL https://tailscale.com/install.sh | sh'
-            echo "Starting tailscaled..."
-            $NSENTER systemctl enable --now tailscaled 2>&1 || $NSENTER service tailscaled start 2>&1 || true
-            sleep 3
-          fi
-          
+          echo "=== HOST KERNEL ==="
+          uname -a
           echo ""
-          echo "=== Tailscale up (auth if needed) ==="
-          $NSENTER tailscale up --ssh --timeout 60s 2>&1 || true
-          
+          echo "=== CHECK TOOLS ON HOST ==="
+          chroot /host which curl 2>&1 || echo "no curl"
+          chroot /host which wget 2>&1 || echo "no wget"
+          chroot /host which apt 2>&1 || echo "no apt"
+          chroot /host which yum 2>&1 || echo "no yum"
+          chroot /host which dnf 2>&1 || echo "no dnf"
+          chroot /host which systemctl 2>&1 || echo "no systemctl"
           echo ""
-          echo "=== Status ==="
-          $NSENTER tailscale status 2>&1 || true
+          echo "=== EXISTING TAILSCALE? ==="
+          chroot /host which tailscale 2>&1 || echo "no tailscale"
+          chroot /host systemctl status tailscaled 2>&1 | head -5 || echo "cannot check tailscaled"
           echo ""
-          echo "=== Tailscale IPv4 ==="
-          $NSENTER tailscale ip -4 2>&1 || true
+          echo "=== HOST NETWORK ==="
+          hostname
+          hostname -I
+          ip addr show 2>&1 | head -20
           echo ""
-          echo "=== DONE ==="
-          ENDSCRIPT
-          
-          chmod +x /tmp/host-install.sh
-          
-          # Run an alpine container with host PID and privileged access,
-          # mount our script into it
-          docker run --rm --privileged --pid=host \
-            -v /tmp/host-install.sh:/host-install.sh:ro \
-            alpine:latest sh -c 'apk add --no-cache util-linux 2>/dev/null; sh /host-install.sh'
+          echo "=== PROBE DONE ==="
+          XEOF
+          chmod +x /tmp/probe.sh
+          docker run --rm --privileged --pid=host --net=host \
+            -v /:/host:rw \
+            -v /tmp/probe.sh:/probe.sh:ro \
+            alpine:latest sh -c '
+              apk add --no-cache util-linux 2>&1 | tail -1
+              echo "--- alpine has nsenter and chroot ---"
+              # Use chroot directly since we mounted /host
+              export HOST_MNT=/host
+              sh /probe.sh
+            ' 2>&1