Add macOS VM support to the vmtest framework using Tart's pre-built
macOS images (ghcr.io/cirruslabs/macos-tahoe-base) instead of building
from IPSW. The Tart image has SIP disabled and SSH enabled.
At test time, the Tart base image's disk, NVRAM, and hardware identity
are APFS-cloned into a tailmac-compatible directory layout, and the VM
is booted headlessly via tailmac's Host.app (Virtualization.framework)
with its NIC connected to vnet's dgram socket.
New features:
- tailmac.go: ensureTartImage (auto-pull), cloneTartToTailmac (format
conversion), startTailMacVM (launch + cleanup)
- NoAgent() node option for VMs without TTA installed
- LANPing() for ICMP reachability testing via TTA's /ping endpoint
- IsMacOS field on OSImage, with GOOS/GOARCH support
- Dgram socket listener in Start() for macOS VMs
- Fix ReadFromUnix error spam on dgram socket close in vnet
TestMacOSAndLinuxCanPing verifies a macOS Tart VM and a gokrazy Linux
VM can ping each other on the same vnet LAN.
Updates #13038
Change-Id: I5e73a27878abf009f780fdf11a346fc857711cff
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