mirror of https://github.com/tailscale/tailscale/
tstest/integration: add experimental integration test (#1966)
This will spin up a few vms and then try and make them connect to a testcontrol server. Updates #1988 Signed-off-by: Christine Dodrill <xe@tailscale.com>pull/1989/head
Christine Dodrill
3 years ago
committed by
GitHub
parent
60e920bf18
commit
ba59c0391b
@ -0,0 +1,7 @@
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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package vms does VM-based integration/functional tests by using
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// qemu and a bank of pre-made VM images.
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package vms
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@ -0,0 +1,489 @@
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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build linux
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package vms
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import (
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"crypto/sha256"
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"encoding/hex"
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"flag"
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"fmt"
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"io"
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"net"
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"net/http"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"regexp"
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"strings"
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"sync"
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"syscall"
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"testing"
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"text/template"
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"time"
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expect "github.com/google/goexpect"
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"golang.org/x/crypto/ssh"
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"tailscale.com/tstest/integration/testcontrol"
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)
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var runVMTests = flag.Bool("run-vm-tests", false, "if set, run expensive (10G+ ram) VM based integration tests")
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type Distro struct {
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name string // amazon-linux
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size string // 5
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url string // URL to a qcow2 image
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sha256sum string // hex-encoded sha256 sum
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mem int // VM memory in megabytes
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packageManager string // yum/apt/dnf/zypper
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}
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func (d *Distro) InstallPre() string {
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switch d.packageManager {
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case "yum":
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return ` - [ yum, update, gnupg2 ]
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`
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case "apt":
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return ` - [ apt-get, update ]
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- [ apt-get, "-y", install, curl, "apt-transport-https", gnupg2 ]
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`
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}
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return ""
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}
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// fetchDistro fetches a distribution from the internet if it doesn't already exist locally. It
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// also validates the sha256 sum from a known good hash.
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func fetchDistro(t *testing.T, resultDistro Distro) {
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t.Helper()
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cdir, err := os.UserCacheDir()
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if err != nil {
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t.Fatalf("can't find cache dir: %v", err)
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}
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cdir = filepath.Join(cdir, "tailscale", "vm-test")
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qcowPath := filepath.Join(cdir, "qcow2", resultDistro.sha256sum)
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_, err = os.Stat(qcowPath)
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if err != nil {
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t.Logf("downloading distro image %s to %s", resultDistro.url, qcowPath)
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fout, err := os.Create(qcowPath)
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if err != nil {
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t.Fatal(err)
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}
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resp, err := http.Get(resultDistro.url)
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if err != nil {
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t.Fatalf("can't fetch qcow2 for %s (%s): %v", resultDistro.name, resultDistro.url, err)
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}
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if resp.StatusCode != http.StatusOK {
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resp.Body.Close()
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t.Fatalf("%s replied %s", resultDistro.url, resp.Status)
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}
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_, err = io.Copy(fout, resp.Body)
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resp.Body.Close()
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if err != nil {
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t.Fatalf("download of %s failed: %v", resultDistro.url, err)
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}
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err = fout.Close()
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if err != nil {
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t.Fatalf("can't close fout: %v", err)
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}
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fin, err := os.Open(qcowPath)
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if err != nil {
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t.Fatal(err)
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}
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hasher := sha256.New()
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if _, err := io.Copy(hasher, fin); err != nil {
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t.Fatal(err)
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}
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hash := hex.EncodeToString(hasher.Sum(nil))
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if hash != resultDistro.sha256sum {
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t.Logf("want: %q", resultDistro.sha256sum)
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t.Logf("got: %q", hash)
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t.Fatal("hash mismatch, someone is doing something nasty")
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}
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t.Logf("hash check passed (%s)", resultDistro.sha256sum)
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}
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}
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// run runs a command or fails the test.
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func run(t *testing.T, dir, prog string, args ...string) {
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t.Helper()
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t.Logf("running: %s %s", prog, strings.Join(args, " "))
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cmd := exec.Command(prog, args...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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cmd.Dir = dir
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if err := cmd.Run(); err != nil {
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t.Fatal(err)
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}
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}
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// mkLayeredQcow makes a layered qcow image that allows us to keep the upstream VM images
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// pristine and only do our changes on an overlay.
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func mkLayeredQcow(t *testing.T, tdir string, d Distro) {
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t.Helper()
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cdir, err := os.UserCacheDir()
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if err != nil {
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t.Fatalf("can't find cache dir: %v", err)
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}
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cdir = filepath.Join(cdir, "tailscale", "vm-test")
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run(t, tdir, "qemu-img", "create",
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"-f", "qcow2",
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"-o", "backing_file="+filepath.Join(cdir, "qcow2", d.sha256sum),
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filepath.Join(tdir, d.name+".qcow2"),
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)
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}
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// mkSeed makes the cloud-init seed ISO that is used to configure a VM with tailscale.
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func mkSeed(t *testing.T, d Distro, sshKey, hostURL, tdir string, port int) {
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t.Helper()
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dir := filepath.Join(tdir, d.name, "seed")
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os.MkdirAll(dir, 0700)
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// make meta-data
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{
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fout, err := os.Create(filepath.Join(dir, "meta-data"))
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if err != nil {
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t.Fatal(err)
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}
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err = template.Must(template.New("meta-data.yaml").Parse(metaDataTemplate)).Execute(fout, struct {
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ID string
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Hostname string
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}{
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ID: "31337",
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Hostname: d.name,
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})
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if err != nil {
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t.Fatal(err)
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}
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fout.Close()
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}
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// make user-data
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{
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fout, err := os.Create(filepath.Join(dir, "user-data"))
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if err != nil {
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t.Fatal(err)
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}
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err = template.Must(template.New("user-data.yaml").Parse(userDataTemplate)).Execute(fout, struct {
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SSHKey string
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HostURL string
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Hostname string
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Port int
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InstallPre string
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}{
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SSHKey: strings.TrimSpace(sshKey),
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HostURL: hostURL,
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Hostname: d.name,
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Port: port,
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InstallPre: d.InstallPre(),
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})
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if err != nil {
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t.Fatal(err)
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}
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fout.Close()
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}
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run(t, tdir, "genisoimage",
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"-output", filepath.Join(dir, "seed.iso"),
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"-volid", "cidata", "-joliet", "-rock",
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filepath.Join(dir, "meta-data"),
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filepath.Join(dir, "user-data"),
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)
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}
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// mkVM makes a KVM-accelerated virtual machine and prepares it for introduction to the
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// testcontrol server. The function it returns is for killing the virtual machine when it
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// is time for it to die.
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func mkVM(t *testing.T, n int, d Distro, sshKey, hostURL, tdir string) func() {
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t.Helper()
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cdir, err := os.UserCacheDir()
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if err != nil {
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t.Fatalf("can't find cache dir: %v", err)
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}
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cdir = filepath.Join(cdir, "within", "mkvm")
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os.MkdirAll(filepath.Join(cdir, "qcow2"), 0755)
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os.MkdirAll(filepath.Join(cdir, "seed"), 0755)
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port := 23100 + n
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fetchDistro(t, d)
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mkLayeredQcow(t, tdir, d)
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mkSeed(t, d, sshKey, hostURL, tdir, port)
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driveArg := fmt.Sprintf("file=%s,if=virtio", filepath.Join(tdir, d.name+".qcow2"))
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args := []string{
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"-machine", "pc-q35-5.1,accel=kvm,usb=off,vmport=off,dump-guest-core=off",
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"-netdev", fmt.Sprintf("user,hostfwd=::%d-:22,id=net0", port),
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"-device", "virtio-net-pci,netdev=net0,id=net0,mac=8a:28:5c:30:1f:25",
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"-m", fmt.Sprint(d.mem),
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"-boot", "c",
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"-drive", driveArg,
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"-cdrom", filepath.Join(tdir, d.name, "seed", "seed.iso"),
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"-vnc", fmt.Sprintf(":%d", n),
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}
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t.Logf("running: qemu-system-x86_64 %s", strings.Join(args, " "))
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cmd := exec.Command("qemu-system-x86_64", args...)
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err = cmd.Start()
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if err != nil {
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t.Fatal(err)
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}
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time.Sleep(time.Second)
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if err := cmd.Process.Signal(syscall.Signal(0)); err != nil {
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t.Fatal("qemu is not running")
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}
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return func() {
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err := cmd.Process.Kill()
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if err != nil {
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t.Errorf("can't kill %s (%d): %v", d.name, cmd.Process.Pid, err)
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}
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}
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}
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// TestVMIntegrationEndToEnd creates a virtual machine with mkvm(1X), installs tailscale on it and then ensures that it connects to the network successfully.
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func TestVMIntegrationEndToEnd(t *testing.T) {
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if !*runVMTests {
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t.Skip("not running integration tests (need -run-vm-tests)")
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}
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if _, err := exec.LookPath("qemu-system-x86_64"); err != nil {
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t.Logf("hint: nix-shell -p go -p qemu -p cdrkit --run 'go test -v -timeout=60m -run-vm-tests'")
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t.Fatalf("missing dependency: %v", err)
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}
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if _, err := exec.LookPath("genisoimage"); err != nil {
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t.Logf("hint: nix-shell -p go -p qemu -p cdrkit --run 'go test -v -timeout=60m -run-vm-tests'")
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t.Fatalf("missing dependency: %v", err)
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}
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distros := []Distro{
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{"amazon-linux", "25", "https://cdn.amazonlinux.com/os-images/2.0.20210427.0/kvm/amzn2-kvm-2.0.20210427.0-x86_64.xfs.gpt.qcow2", "6ef9daef32cec69b2d0088626ec96410cd24afc504d57278bbf2f2ba2b7e529b", 512, "yum"},
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{"centos-7", "8", "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2", "1db30c9c272fb37b00111b93dcebff16c278384755bdbe158559e9c240b73b80", 512, "yum"},
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{"centos-8", "10", "https://cloud.centos.org/centos/8/x86_64/images/CentOS-8-GenericCloud-8.3.2011-20201204.2.x86_64.qcow2", "7ec97062618dc0a7ebf211864abf63629da1f325578868579ee70c495bed3ba0", 768, "dnf"},
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{"debian-9", "5", "https://cdimage.debian.org/cdimage/openstack/9.13.21-20210511/debian-9.13.21-20210511-openstack-amd64.qcow2", "0667a08e2d947b331aee068db4bbf3a703e03edaf5afa52e23d534adff44b62a", 512, "apt"},
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{"debian-10", "5", "https://cdimage.debian.org/images/cloud/buster/20210329-591/debian-10-generic-amd64-20210329-591.qcow2", "70c61956095870c4082103d1a7a1cb5925293f8405fc6cb348588ec97e8611b0", 768, "apt"},
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{"fedora-34", "5", "https://download.fedoraproject.org/pub/fedora/linux/releases/34/Cloud/x86_64/images/Fedora-Cloud-Base-34-1.2.x86_64.qcow2", "b9b621b26725ba95442d9a56cbaa054784e0779a9522ec6eafff07c6e6f717ea", 768, "dnf"},
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{"opensuse-leap-15.1", "10", "https://download.opensuse.org/repositories/Cloud:/Images:/Leap_15.1/images/openSUSE-Leap-15.1-OpenStack.x86_64.qcow2", "3203e256dab5981ca3301408574b63bc522a69972fbe9850b65b54ff44a96e0a", 512, "zypper"},
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{"opensuse-leap-15.2", "10", "https://download.opensuse.org/repositories/Cloud:/Images:/Leap_15.2/images/openSUSE-Leap-15.2-OpenStack.x86_64.qcow2", "4df9cee9281d1f57d20f79dc65d76e255592b904760e73c0dd44ac753a54330f", 512, "zypper"},
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{"opensuse-tumbleweed", "5", "https://download.opensuse.org/tumbleweed/appliances/openSUSE-Tumbleweed-JeOS.x86_64-OpenStack-Cloud.qcow2", "f5a40c693187dddc524b0877b0aba31cdb6f2e78f12acce0bbb2975ec120dfc0", 512, "zypper"},
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{"ubuntu-16-04", "5", "https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-amd64-disk1.img", "50a21bc067c05e0c73bf5d8727ab61152340d93073b3dc32eff18b626f7d813b", 512, "apt"},
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{"ubuntu-18-04", "5", "https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img", "78f09b6086367914d23f26e38c3cd88a2aaf1a6a4500ebd46c74ad60c56c1585", 512, "apt"},
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{"ubuntu-20-04", "5", "https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img", "513158b22ff0f08d0a078d8d60293bcddffdb17094a7809c76c52aba415ecc54", 512, "apt"},
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{"ubuntu-20-10", "5", "https://cloud-images.ubuntu.com/groovy/current/groovy-server-cloudimg-amd64.img", "c1332c24557389a129ff98fa169e34cb53c02555ed702a235e26b8978dd004c3", 512, "apt"},
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{"ubuntu-21-04", "5", "https://cloud-images.ubuntu.com/hirsute/current/hirsute-server-cloudimg-amd64.img", "2f8a562637340a026f712594f1257673543d74725d8e3daf88d533d7b8bf448f", 512, "apt"},
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}
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dir := t.TempDir()
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ln, err := net.Listen("tcp", "192.168.122.1:0")
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if err != nil {
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t.Fatalf("can't make TCP listener: %v", err)
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}
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defer ln.Close()
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t.Logf("host:port: %s", ln.Addr())
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cs := &testcontrol.Server{}
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var (
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ipMu sync.Mutex
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ipMap = map[string]string{} // SSH port => IP address
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)
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mux := http.NewServeMux()
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mux.Handle("/", cs)
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// This handler will let the virtual machines tell the host information about that VM.
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// This is used to maintain a list of port->IP address mappings that are known to be
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// working. This allows later steps to connect over SSH. This returns no response to
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// clients because no response is needed.
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mux.HandleFunc("/myip/", func(w http.ResponseWriter, r *http.Request) {
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ipMu.Lock()
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defer ipMu.Unlock()
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name := path.Base(r.URL.Path)
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host, _, _ := net.SplitHostPort(r.RemoteAddr)
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ipMap[name] = host
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t.Logf("%s: %v", name, host)
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})
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hs := &http.Server{Handler: mux}
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go hs.Serve(ln)
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run(t, dir, "ssh-keygen", "-t", "ed25519", "-f", "machinekey", "-N", ``)
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pubkey, err := os.ReadFile(filepath.Join(dir, "machinekey.pub"))
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if err != nil {
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t.Fatalf("can't read ssh key: %v", err)
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}
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privateKey, err := os.ReadFile(filepath.Join(dir, "machinekey"))
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if err != nil {
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t.Fatalf("can't read ssh private key: %v", err)
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}
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signer, err := ssh.ParsePrivateKey(privateKey)
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if err != nil {
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t.Fatalf("can't parse private key: %v", err)
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}
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loginServer := fmt.Sprintf("http://%s", ln.Addr())
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cancels := make(chan func(), len(distros))
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t.Run("mkvm", func(t *testing.T) {
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for n, distro := range distros {
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n, distro := n, distro
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t.Run(distro.name, func(t *testing.T) {
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t.Parallel()
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cancel := mkVM(t, n, distro, string(pubkey), loginServer, dir)
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cancels <- cancel
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})
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}
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})
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close(cancels)
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for cancel := range cancels {
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//lint:ignore SA9001 They do actually get ran
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defer cancel()
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if len(cancels) == 0 {
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t.Log("all VMs started")
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break
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}
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}
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t.Run("wait-for-vms", func(t *testing.T) {
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t.Log("waiting for VMs to register")
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waiter := time.NewTicker(time.Second)
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defer waiter.Stop()
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n := 0
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for {
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<-waiter.C
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ipMu.Lock()
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if len(ipMap) == len(distros) {
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ipMu.Unlock()
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break
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} else {
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if n%30 == 0 {
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t.Logf("ipMap: %d", len(ipMap))
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t.Logf("distros: %d", len(distros))
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||||
}
|
||||
}
|
||||
n++
|
||||
ipMu.Unlock()
|
||||
}
|
||||
})
|
||||
|
||||
ipMu.Lock()
|
||||
defer ipMu.Unlock()
|
||||
t.Run("join-net", func(t *testing.T) {
|
||||
for port := range ipMap {
|
||||
port := port
|
||||
t.Run(port, func(t *testing.T) {
|
||||
config := &ssh.ClientConfig{
|
||||
User: "ts",
|
||||
Auth: []ssh.AuthMethod{ssh.PublicKeys(signer), ssh.Password("hunter2")},
|
||||
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
|
||||
}
|
||||
|
||||
cli, err := ssh.Dial("tcp", fmt.Sprintf("127.0.0.1:%s", port), config)
|
||||
if err != nil {
|
||||
t.Fatalf("can't dial 127.0.0.1:%s: %v", port, err)
|
||||
}
|
||||
defer cli.Close()
|
||||
|
||||
t.Parallel()
|
||||
t.Logf("about to ssh into 127.0.0.1:%s", port)
|
||||
timeout := 5 * time.Minute
|
||||
|
||||
e, _, err := expect.SpawnSSH(cli, timeout, expect.Verbose(true), expect.VerboseWriter(os.Stdout))
|
||||
if err != nil {
|
||||
t.Fatalf("%s: can't register a shell session: %v", port, err)
|
||||
}
|
||||
defer e.Close()
|
||||
|
||||
_, _, err = e.Expect(regexp.MustCompile(`(\$|\>)`), timeout)
|
||||
if err != nil {
|
||||
t.Fatalf("%s: can't get a shell: %v", port, err)
|
||||
}
|
||||
t.Logf("got shell for %s", port)
|
||||
err = e.Send(fmt.Sprintf("sudo tailscale up --login-server %s\n", loginServer))
|
||||
if err != nil {
|
||||
t.Fatalf("%s: can't send tailscale up command: %v", port, err)
|
||||
}
|
||||
_, _, err = e.Expect(regexp.MustCompile(`Success.`), timeout)
|
||||
if err != nil {
|
||||
t.Fatalf("can't extract URL: %v", err)
|
||||
}
|
||||
})
|
||||
}
|
||||
})
|
||||
|
||||
if numNodes := cs.NumNodes(); numNodes != len(ipMap) {
|
||||
t.Errorf("wanted %d nodes, got: %d", len(ipMap), numNodes)
|
||||
}
|
||||
}
|
||||
|
||||
const metaDataTemplate = `instance-id: {{.ID}}
|
||||
local-hostname: {{.Hostname}}`
|
||||
|
||||
const userDataTemplate = `#cloud-config
|
||||
#vim:syntax=yaml
|
||||
|
||||
cloud_config_modules:
|
||||
- runcmd
|
||||
|
||||
cloud_final_modules:
|
||||
- [users-groups, always]
|
||||
- [scripts-user, once-per-instance]
|
||||
|
||||
users:
|
||||
- name: ts
|
||||
plain_text_passwd: hunter2
|
||||
groups: [ wheel ]
|
||||
sudo: [ "ALL=(ALL) NOPASSWD:ALL" ]
|
||||
shell: /bin/sh
|
||||
ssh-authorized-keys:
|
||||
- {{.SSHKey}}
|
||||
|
||||
write_files:
|
||||
- path: /etc/cloud/cloud.cfg.d/80_disable_network_after_firstboot.cfg
|
||||
content: |
|
||||
# Disable network configuration after first boot
|
||||
network:
|
||||
config: disabled
|
||||
|
||||
runcmd:
|
||||
{{.InstallPre}}
|
||||
- [ "sh", "-c", "curl https://raw.githubusercontent.com/tailscale/tailscale/Xe/test-install-script-libvirtd/scripts/installer.sh | sh" ]
|
||||
- [ systemctl, enable, --now, tailscaled.service ]
|
||||
- [ curl, "{{.HostURL}}/myip/{{.Port}}", "-H", "User-Agent: {{.Hostname}}" ]
|
||||
`
|
||||
Loading…
Reference in New Issue