Example #1
0
func main() {
	globalFlagset.Parse(os.Args[1:])
	args := globalFlagset.Args()
	if len(args) > 0 {
		fmt.Fprintln(os.Stderr, "Wrong parameters")
		os.Exit(1)
	}

	if globalFlags.PreSleep >= 0 {
		time.Sleep(time.Duration(globalFlags.PreSleep) * time.Second)
	}

	if globalFlags.ReadStdin {
		reader := bufio.NewReader(os.Stdin)
		fmt.Printf("Enter text:\n")
		text, _ := reader.ReadString('\n')
		fmt.Printf("Received text: %s\n", text)
	}

	if globalFlags.CheckTty {
		fd := int(os.Stdin.Fd())
		var termios syscall.Termios
		_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), syscall.TCGETS, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
		if err == 0 {
			fmt.Printf("stdin is a terminal\n")
		} else {
			fmt.Printf("stdin is not a terminal\n")
		}
	}

	if globalFlags.PrintExec {
		fmt.Fprintf(os.Stdout, "inspect execed as: %s\n", os.Args[0])
	}

	if globalFlags.PrintMsg != "" {
		fmt.Fprintf(os.Stdout, "%s\n", globalFlags.PrintMsg)
		messageLoopStr := os.Getenv("MESSAGE_LOOP")
		messageLoop, err := strconv.Atoi(messageLoopStr)
		if err == nil {
			for i := 0; i < messageLoop; i++ {
				time.Sleep(time.Second)
				fmt.Fprintf(os.Stdout, "%s\n", globalFlags.PrintMsg)
			}
		}
	}

	if globalFlags.PrintEnv != "" {
		fmt.Fprintf(os.Stdout, "%s=%s\n", globalFlags.PrintEnv, os.Getenv(globalFlags.PrintEnv))
	}

	if globalFlags.PrintCapsPid >= 0 {
		caps, err := capability.NewPid(globalFlags.PrintCapsPid)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Cannot get caps: %v\n", err)
			os.Exit(1)
		}
		fmt.Printf("Capability set: effective: %s\n", caps.StringCap(capability.EFFECTIVE))
		fmt.Printf("Capability set: permitted: %s\n", caps.StringCap(capability.PERMITTED))
		fmt.Printf("Capability set: inheritable: %s\n", caps.StringCap(capability.INHERITABLE))
		fmt.Printf("Capability set: bounding: %s\n", caps.StringCap(capability.BOUNDING))

		if capStr := os.Getenv("CAPABILITY"); capStr != "" {
			capInt, err := strconv.Atoi(capStr)
			if err != nil {
				fmt.Fprintf(os.Stderr, "Environment variable $CAPABILITY is not a valid capability number: %v\n", err)
				os.Exit(1)
			}
			c := capability.Cap(capInt)
			if caps.Get(capability.BOUNDING, c) {
				fmt.Printf("%v=enabled\n", c.String())
			} else {
				fmt.Printf("%v=disabled\n", c.String())
			}
		}
	}

	if globalFlags.PrintUser {
		fmt.Printf("User: uid=%d euid=%d gid=%d egid=%d\n", os.Getuid(), os.Geteuid(), os.Getgid(), os.Getegid())
	}

	if globalFlags.PrintGroups {
		gids, err := os.Getgroups()
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error getting groups: %v\n", err)
			os.Exit(1)
		}
		// getgroups(2): It is unspecified whether the effective group ID of
		// the calling process is included in the returned list. (Thus, an
		// application should also call getegid(2) and add or remove the
		// resulting value.)
		egid := os.Getegid()
		if !in(gids, egid) {
			gids = append(gids, egid)
			sort.Ints(gids)
		}
		var b bytes.Buffer
		for _, gid := range gids {
			b.WriteString(fmt.Sprintf("%d ", gid))
		}
		fmt.Printf("Groups: %s\n", b.String())
	}

	if globalFlags.WriteFile {
		fileName := os.Getenv("FILE")
		if globalFlags.FileName != "" {
			fileName = globalFlags.FileName
		}
		content := os.Getenv("CONTENT")
		if globalFlags.Content != "" {
			content = globalFlags.Content
		}

		err := ioutil.WriteFile(fileName, []byte(content), 0600)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Cannot write to file %q: %v\n", fileName, err)
			os.Exit(1)
		}
	}

	if globalFlags.ReadFile {
		fileName := os.Getenv("FILE")
		if globalFlags.FileName != "" {
			fileName = globalFlags.FileName
		}

		dat, err := ioutil.ReadFile(fileName)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Cannot read file %q: %v\n", fileName, err)
			os.Exit(1)
		}
		fmt.Print("<<<")
		fmt.Print(string(dat))
		fmt.Print(">>>\n")
	}

	if globalFlags.CheckCwd != "" {
		wd, err := os.Getwd()
		if err != nil {
			fmt.Fprintf(os.Stderr, "Cannot get working directory: %v\n", err)
			os.Exit(1)
		}
		if wd != globalFlags.CheckCwd {
			fmt.Fprintf(os.Stderr, "Working directory: %q. Expected: %q.\n", wd, globalFlags.CheckCwd)
			os.Exit(1)
		}
	}

	if globalFlags.Sleep >= 0 {
		time.Sleep(time.Duration(globalFlags.Sleep) * time.Second)
	}

	if globalFlags.PrintMemoryLimit {
		memCgroupPath, err := cgroup.GetOwnCgroupPath("memory")
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error getting own memory cgroup path: %v\n", err)
			os.Exit(1)
		}
		// we use /proc/1/root to escape the chroot we're in and read our
		// memory limit
		limitPath := filepath.Join("/proc/1/root/sys/fs/cgroup/memory", memCgroupPath, "memory.limit_in_bytes")
		limit, err := ioutil.ReadFile(limitPath)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Can't read memory.limit_in_bytes\n")
			os.Exit(1)
		}

		fmt.Printf("Memory Limit: %s\n", string(limit))
	}

	if globalFlags.PrintCPUQuota {
		cpuCgroupPath, err := cgroup.GetOwnCgroupPath("cpu")
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error getting own cpu cgroup path: %v\n", err)
			os.Exit(1)
		}
		// we use /proc/1/root to escape the chroot we're in and read our
		// cpu quota
		periodPath := filepath.Join("/proc/1/root/sys/fs/cgroup/cpu", cpuCgroupPath, "cpu.cfs_period_us")
		periodBytes, err := ioutil.ReadFile(periodPath)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Can't read cpu.cpu_period_us\n")
			os.Exit(1)
		}
		quotaPath := filepath.Join("/proc/1/root/sys/fs/cgroup/cpu", cpuCgroupPath, "cpu.cfs_quota_us")
		quotaBytes, err := ioutil.ReadFile(quotaPath)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Can't read cpu.cpu_quota_us\n")
			os.Exit(1)
		}

		period, err := strconv.Atoi(strings.Trim(string(periodBytes), "\n"))
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		quota, err := strconv.Atoi(strings.Trim(string(quotaBytes), "\n"))
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}

		quotaMilliCores := quota * 1000 / period
		fmt.Printf("CPU Quota: %s\n", strconv.Itoa(quotaMilliCores))
	}

	if globalFlags.CheckCgroupMounts {
		rootCgroupPath := "/proc/1/root/sys/fs/cgroup"
		testPaths := []string{rootCgroupPath}

		// test a couple of controllers if they're available
		if cgroup.IsIsolatorSupported("memory") {
			testPaths = append(testPaths, filepath.Join(rootCgroupPath, "memory"))
		}
		if cgroup.IsIsolatorSupported("cpu") {
			testPaths = append(testPaths, filepath.Join(rootCgroupPath, "cpu"))
		}

		for _, p := range testPaths {
			if err := syscall.Mkdir(filepath.Join(p, "test"), 0600); err == nil || err != syscall.EROFS {
				fmt.Println("check-cgroups: FAIL")
				os.Exit(1)
			}
		}

		fmt.Println("check-cgroups: SUCCESS")
	}

	if globalFlags.PrintNetNS {
		ns, err := os.Readlink("/proc/self/ns/net")
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("NetNS: %s\n", ns)
	}

	if globalFlags.PrintIPv4 != "" {
		iface := globalFlags.PrintIPv4
		ips, err := testutils.GetIPsv4(iface)
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("%v IPv4: %s\n", iface, ips[0])
	}

	if globalFlags.PrintDefaultGWv4 {
		gw, err := testutils.GetDefaultGWv4()
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("DefaultGWv4: %s\n", gw)
	}

	if globalFlags.PrintDefaultGWv6 {
		gw, err := testutils.GetDefaultGWv6()
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("DefaultGWv6: %s\n", gw)
	}

	if globalFlags.PrintGWv4 != "" {
		// TODO: GetGW not implemented yet
		iface := globalFlags.PrintGWv4
		gw, err := testutils.GetGWv4(iface)
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("%v GWv4: %s\n", iface, gw)
	}

	if globalFlags.PrintIPv6 != "" {
		// TODO
	}

	if globalFlags.PrintGWv6 != "" {
		// TODO
	}

	if globalFlags.ServeHttp != "" {
		err := testutils.HttpServe(globalFlags.ServeHttp, globalFlags.ServeHttpTimeout)
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
	}

	if globalFlags.GetHttp != "" {
		body, err := testutils.HttpGet(globalFlags.GetHttp)
		if err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
			os.Exit(1)
		}
		fmt.Printf("HTTP-Get received: %s\n", body)
	}

	os.Exit(globalFlags.ExitCode)
}
Example #2
0
/*
 * Host launches http server on all interfaces in the host netns
 * Container must be able to connect via any IP address of the host in the
 * macvlan network, which is NAT
 * TODO: test connection to host on an outside interface
 */
func testNetCustomNatConnectivity(t *testing.T, nt networkTemplateT) {
	ctx := testutils.NewRktRunCtx()
	defer ctx.Cleanup()

	netdir := prepareTestNet(t, ctx, nt)
	defer os.RemoveAll(netdir)

	httpPort, err := testutils.GetNextFreePort4()
	if err != nil {
		t.Fatalf("%v", err)
	}
	httpServeAddr := fmt.Sprintf("0.0.0.0:%v", httpPort)
	httpServeTimeout := 30

	nonLoIPv4, err := testutils.GetNonLoIfaceIPv4()
	if err != nil {
		t.Fatalf("%v", err)
	}
	if nonLoIPv4 == "" {
		t.Skipf("Can not find any NAT'able IPv4 on the host, skipping..")
	}

	httpGetAddr := fmt.Sprintf("http://%v:%v", nonLoIPv4, httpPort)
	t.Log("Telling the child to connect via", httpGetAddr)

	ga := testutils.NewGoroutineAssistant(t)
	ga.Add(2)

	// Host opens the server
	go func() {
		defer ga.Done()
		err := testutils.HttpServe(httpServeAddr, httpServeTimeout)
		if err != nil {
			ga.Fatalf("Error during HttpServe: %v", err)
		}
	}()

	// Child connects to host
	hostname, err := os.Hostname()
	go func() {
		defer ga.Done()
		testImageArgs := []string{fmt.Sprintf("--exec=/inspect --get-http=%v", httpGetAddr)}
		testImage := patchTestACI("rkt-inspect-networking.aci", testImageArgs...)
		defer os.Remove(testImage)

		cmd := fmt.Sprintf("%s --debug --insecure-skip-verify run --net=%v --mds-register=false %s", ctx.Cmd(), nt.Name, testImage)
		child := ga.SpawnOrFail(cmd)
		defer ga.WaitOrFail(child)

		expectedRegex := `HTTP-Get received: (.*)\r`
		result, out, err := expectRegexWithOutput(child, expectedRegex)
		if err != nil {
			ga.Fatalf("Error: %v\nOutput: %v", err, out)
		}
		if result[1] != hostname {
			ga.Fatalf("Hostname received by client `%v` doesn't match `%v`", result[1], hostname)
		}
	}()

	ga.Wait()
}
Example #3
0
/*
 * Default private-net
 * ---
 * Host launches http server on all interfaces in the host netns
 * Container must be able to connect via any IP address of the host in the
 * default network, which is NATed
 * TODO: test connection to host on an outside interface
 */
func TestPrivateNetDefaultConnectivity(t *testing.T) {
	httpPort, err := testutils.GetNextFreePort4()
	if err != nil {
		t.Fatalf("%v", err)
	}
	httpServeAddr := fmt.Sprintf("0.0.0.0:%v", httpPort)
	httpServeTimeout := 30

	nonLoIPv4, err := testutils.GetNonLoIfaceIPv4()
	if err != nil {
		t.Fatalf("%v", err)
	}
	if nonLoIPv4 == "" {
		t.Skipf("Can not find any NAT'able IPv4 on the host, skipping..")
	}

	httpGetAddr := fmt.Sprintf("http://%v:%v", nonLoIPv4, httpPort)
	t.Log("Telling the child to connect via", httpGetAddr)

	testImageArgs := []string{fmt.Sprintf("--exec=/inspect --get-http=%v", httpGetAddr)}
	testImage := patchTestACI("rkt-inspect-networking.aci", testImageArgs...)
	defer os.Remove(testImage)

	ctx := newRktRunCtx()
	defer ctx.cleanup()
	defer ctx.reset()

	ga := testutils.NewGoroutineAssistant(t)

	// Host opens the server
	ga.Add(1)
	go func() {
		defer ga.Done()
		err := testutils.HttpServe(httpServeAddr, httpServeTimeout)
		if err != nil {
			t.Fatalf("Error during HttpServe: %v", err)
		}
	}()

	// Child connects to host
	ga.Add(1)
	hostname, err := os.Hostname()
	go func() {
		defer ga.Done()
		cmd := fmt.Sprintf("%s --debug --insecure-skip-verify run --private-net=default --mds-register=false %s", ctx.cmd(), testImage)
		t.Logf("Command: %v\n", cmd)
		child, err := gexpect.Spawn(cmd)
		if err != nil {
			ga.Fatalf("Cannot exec rkt: %v", err)
			return
		}
		expectedRegex := `HTTP-Get received: (.*)\r`
		result, out, err := expectRegexWithOutput(child, expectedRegex)
		if err != nil {
			ga.Fatalf("Error: %v\nOutput: %v", err, out)
			return
		}
		if result[1] != hostname {
			ga.Fatalf("Hostname received by client `%v` doesn't match `%v`", result[1], hostname)
			return
		}

		err = child.Wait()
		if err != nil {
			ga.Fatalf("rkt didn't terminate correctly: %v", err)
		}
	}()

	ga.Wait()
}