Add an optional --vmtest-web flag that starts an HTTP server showing a
live dashboard for vmtest runs. The dashboard includes:
- Step progress tracker showing all test phases (compile, image prep,
QEMU launch, agent connect, tailscale up, test-specific steps)
with status icons and elapsed times
- Per-VM "virtual monitor" cards showing serial console output
streamed in realtime via WebSocket
- Per-NIC DHCP status (supporting multi-homed VMs like subnet routers)
- Per-node Tailscale status (hidden for non-tailnet VMs)
- Test status badge (Running/Passed/Failed) with live elapsed timer
- Event log showing all lifecycle events chronologically
Architecture follows the existing util/eventbus HTMX+WebSocket pattern:
the server pushes HTML fragments with hx-swap-oob attributes over a
WebSocket, and HTMX routes them to the correct DOM elements by ID.
Key components:
- vmstatus.go: Step tracker (Begin/End lifecycle), EventBus (pub/sub
with history for late joiners), VMEvent types, NodeStatus tracking
- web.go: HTTP server, WebSocket handler, template loading, ANSI-to-HTML
conversion via robert-nix/ansihtml, deterministic port selection
- assets/: HTML templates, CSS, HTMX library (copied from eventbus)
- vnet/vnet.go: DHCP event callback on Server for observing DHCP lifecycle
- qemu.go: Console log file tailing with manual offset-based reading
Usage:
go test ./tstest/natlab/vmtest/ --run-vm-tests --vmtest-web=:0 -v
When using :0, a deterministic port based on the test name is tried
first so re-runs get the same URL, falling back to OS-assigned on
conflict.
Updates #13038
Change-Id: I45281347b3d7af78ed9f4ff896033984f84dcb4d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
As a warm-up to making natlab support multiple operating systems,
start with an easy one (in that it's also Unixy and open source like
Linux) and add FreeBSD 15.0 as a VM OS option for the vmtest
integration test framework, and add TestSubnetRouterFreeBSD which
tests subnet routing through a FreeBSD VM (Gokrazy → FreeBSD →
Gokrazy).
Key changes:
- Add FreeBSD150 OSImage using the official FreeBSD 15.0
BASIC-CLOUDINIT cloud image (xz-compressed qcow2)
- Add GOOS()/IsFreeBSD() methods to OSImage for cross-compilation
and OS-specific behavior
- Handle xz-compressed image downloads in ensureImage
- Refactor compileBinaries into compileBinariesForOS to support
multiple GOOS targets (linux, freebsd), with binaries registered
at <goos>/<name> paths on the file server VIP
- Add FreeBSD-specific cloud-init (nuageinit) user-data generation:
string-form runcmd (nuageinit doesn't support YAML arrays),
fetch(1) instead of curl, FreeBSD sysctl names for IP forwarding,
mkdir /usr/local/bin, PATH setup for tta
- Skip network-config in cidata ISO for FreeBSD (DHCP via rc.conf)
Updates tailscale/tailscale#13038
Change-Id: Ibeb4f7d02659d5cd8e3a7c3a66ee7b1a92a0110d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Add tstest/natlab/vmtest, a high-level framework for running multi-VM
integration tests with mixed OS types (gokrazy + Ubuntu/Debian cloud
images) connected via natlab's vnet virtual network.
The vmtest package provides:
- Env type that orchestrates vnet, QEMU processes, and agent connections
- OS image support (Gokrazy, Ubuntu2404, Debian12) with download/cache
- QEMU launch per OS type (microvm for gokrazy, q35+KVM for cloud)
- Cloud-init seed ISO generation with network-config for multi-NIC
- Cross-compilation of test binaries for cloud VMs
- Debug SSH NIC on cloud VMs for interactive debugging
- Test helpers: ApproveRoutes, HTTPGet, TailscalePing, DumpStatus,
WaitForPeerRoute, SSHExec
TTA enhancements (cmd/tta):
- Parameterize /up (accept-routes, advertise-routes, snat-subnet-routes)
- Add /set, /start-webserver, /http-get endpoints
- /http-get uses local.Client.UserDial for Tailscale-routed requests
- Fix /ping for non-gokrazy systems
TestSubnetRouter exercises a 3-VM subnet router scenario:
client (gokrazy) → subnet-router (Ubuntu, dual-NIC) → backend (gokrazy)
Verifies HTTP access to the backend webserver through the Tailscale
subnet route. Passes in ~30 seconds.
Updates tailscale/tailscale#13038
Change-Id: I165b64af241d37f5f5870e796a52502fc56146fa
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Brad Fitzpatrick