// getArgsEnv returns the nspawn or lkvm args and env according to the flavor used
func getArgsEnv(p *stage1commontypes.Pod, flavor string, debug bool, n *networking.Networking) ([]string, []string, error) {
var args []string
env := os.Environ()
// We store the pod's flavor so we can later garbage collect it correctly
if err := os.Symlink(flavor, filepath.Join(p.Root, stage1initcommon.FlavorFile)); err != nil {
return nil, nil, fmt.Errorf("failed to create flavor symlink: %v", err)
}
switch flavor {
case "kvm":
if privateUsers != "" {
return nil, nil, fmt.Errorf("flag --private-users cannot be used with an lkvm stage1")
}
// kernel and lkvm are relative path, because init has /var/lib/rkt/..../uuid as its working directory
// TODO: move to path.go
kernelPath := filepath.Join(common.Stage1RootfsPath(p.Root), "bzImage")
lkvmPath := filepath.Join(common.Stage1RootfsPath(p.Root), "lkvm")
netDescriptions := kvm.GetNetworkDescriptions(n)
lkvmNetArgs, err := kvm.GetKVMNetArgs(netDescriptions)
if err != nil {
return nil, nil, err
}
cpu, mem := kvm.GetAppsResources(p.Manifest.Apps)
kernelParams := []string{
"console=hvc0",
"init=/usr/lib/systemd/systemd",
"no_timer_check",
"noreplace-smp",
"systemd.default_standard_error=journal+console",
"systemd.default_standard_output=journal+console",
// "systemd.default_standard_output=tty",
"tsc=reliable",
"MACHINEID=" + p.UUID.String(),
}
if debug {
kernelParams = append(kernelParams, []string{
"debug",
"systemd.log_level=debug",
"systemd.show_status=true",
// "systemd.confirm_spawn=true",
}...)
} else {
kernelParams = append(kernelParams, "quiet")
}
args = append(args, []string{
"./" + lkvmPath, // relative path
"run",
"--name", "rkt-" + p.UUID.String(),
"--no-dhcp", // speed bootup
"--cpu", strconv.FormatInt(cpu, 10),
"--mem", strconv.FormatInt(mem, 10),
"--console=virtio",
"--kernel", kernelPath,
"--disk", "stage1/rootfs", // relative to run/pods/uuid dir this is a place where systemd resides
// MACHINEID will be available as environment variable
"--params", strings.Join(kernelParams, " "),
}...,
)
args = append(args, lkvmNetArgs...)
if debug {
args = append(args, "--debug")
}
// host volume sharing with 9p
nsargs := stage1initcommon.VolumesToKvmDiskArgs(p.Manifest.Volumes)
args = append(args, nsargs...)
// lkvm requires $HOME to be defined,
// see https://github.com/coreos/rkt/issues/1393
if os.Getenv("HOME") == "" {
env = append(env, "HOME=/root")
}
return args, env, nil
case "coreos":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), interpBin))
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
if context := os.Getenv(common.EnvSELinuxContext); context != "" {
args = append(args, fmt.Sprintf("-Z%s", context))
}
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
// use only dynamic libraries provided in the image
env = append(env, "LD_LIBRARY_PATH="+filepath.Join(common.Stage1RootfsPath(p.Root), "usr/lib"))
case "src":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
if context := os.Getenv(common.EnvSELinuxContext); context != "" {
args = append(args, fmt.Sprintf("-Z%s", context))
}
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
case "host":
hostNspawnBin, err := lookupPath("systemd-nspawn", os.Getenv("PATH"))
if err != nil {
return nil, nil, err
}
// Check dynamically which version is installed on the host
// Support version >= 220
versionBytes, err := exec.Command(hostNspawnBin, "--version").CombinedOutput()
if err != nil {
return nil, nil, fmt.Errorf("unable to probe %s version: %v", hostNspawnBin, err)
}
versionStr := strings.SplitN(string(versionBytes), "\n", 2)[0]
var version int
n, err := fmt.Sscanf(versionStr, "systemd %d", &version)
if err != nil {
return nil, nil, fmt.Errorf("cannot parse version: %q", versionStr)
}
if n != 1 || version < 220 {
return nil, nil, fmt.Errorf("rkt needs systemd-nspawn >= 220. %s version not supported: %v", hostNspawnBin, versionStr)
}
// Copy systemd, bash, etc. in stage1 at run-time
if err := installAssets(); err != nil {
return nil, nil, fmt.Errorf("cannot install assets from the host: %v", err)
}
args = append(args, hostNspawnBin)
args = append(args, "--boot") // Launch systemd in the pod
args = append(args, fmt.Sprintf("--register=true"))
if context := os.Getenv(common.EnvSELinuxContext); context != "" {
args = append(args, fmt.Sprintf("-Z%s", context))
}
default:
return nil, nil, fmt.Errorf("unrecognized stage1 flavor: %q", flavor)
}
// link journal only if the host is running systemd
if util.IsRunningSystemd() {
// we write /etc/machine-id here because systemd-nspawn needs it to link
// the container's journal to the host
mPath := filepath.Join(common.Stage1RootfsPath(p.Root), "etc", "machine-id")
mID := strings.Replace(p.UUID.String(), "-", "", -1)
if err := ioutil.WriteFile(mPath, []byte(mID), 0644); err != nil {
log.Fatalf("error writing /etc/machine-id: %v\n", err)
}
args = append(args, "--link-journal=try-guest")
keepUnit, err := util.RunningFromSystemService()
if err != nil {
if err == util.ErrSoNotFound {
fmt.Fprintln(os.Stderr, "Warning: libsystemd not found even though systemd is running. Cgroup limits set by the environment (e.g. a systemd service) won't be enforced.")
} else {
return nil, nil, fmt.Errorf("error determining if we're running from a system service: %v", err)
}
}
if keepUnit {
args = append(args, "--keep-unit")
}
}
if !debug {
args = append(args, "--quiet") // silence most nspawn output (log_warning is currently not covered by this)
env = append(env, "SYSTEMD_LOG_LEVEL=err") // silence log_warning too
}
env = append(env, "SYSTEMD_NSPAWN_CONTAINER_SERVICE=rkt")
if len(privateUsers) > 0 {
args = append(args, "--private-users="+privateUsers)
}
nsargs, err := stage1initcommon.PodToNspawnArgs(p)
if err != nil {
return nil, nil, fmt.Errorf("failed to generate nspawn args: %v", err)
}
args = append(args, nsargs...)
// Arguments to systemd
args = append(args, "--")
args = append(args, "--default-standard-output=tty") // redirect all service logs straight to tty
if !debug {
args = append(args, "--log-target=null") // silence systemd output inside pod
// TODO remove --log-level=warning when we update stage1 to systemd v222
args = append(args, "--log-level=warning") // limit log output (systemd-shutdown ignores --log-target)
args = append(args, "--show-status=0") // silence systemd initialization status output
}
return args, env, nil
}
func TestServiceFile(t *testing.T) {
if !sd_util.IsRunningSystemd() {
t.Skip("Systemd is not running on the host.")
}
ctx := newRktRunCtx()
defer ctx.cleanup()
r := rand.New(rand.NewSource(time.Now().UnixNano()))
conn, err := sd_dbus.New()
if err != nil {
t.Fatal(err)
}
imageFile := os.Getenv("RKT_INSPECT_IMAGE")
if imageFile == "" {
t.Fatal("RKT_INSPECT_IMAGE is not set")
}
image, err := filepath.Abs(imageFile)
if err != nil {
t.Fatal(err)
}
opts := "-- --print-msg=HelloWorld --sleep=1000"
cmd := fmt.Sprintf("%s --insecure-skip-verify run --mds-register=false --set-env=MESSAGE_LOOP=1000 %s %s", ctx.cmd(), image, opts)
props := []sd_dbus.Property{
sd_dbus.PropExecStart(strings.Split(cmd, " "), false),
}
target := fmt.Sprintf("rkt-testing-transient-%d.service", r.Int())
reschan := make(chan string)
_, err = conn.StartTransientUnit(target, "replace", props, reschan)
if err != nil {
t.Fatal(err)
}
job := <-reschan
if job != "done" {
t.Fatal("Job is not done:", job)
}
units, err := conn.ListUnits()
var found bool
for _, u := range units {
if u.Name == target {
found = true
if u.ActiveState != "active" {
t.Fatalf("Test unit %s not active: %s (target: %s)", u.Name, u.ActiveState, target)
}
}
}
if !found {
t.Fatalf("Test unit not found in list")
}
// Run the unit for 10 seconds. You can check the logs manually in journalctl
time.Sleep(10 * time.Second)
// Stop the unit
_, err = conn.StopUnit(target, "replace", reschan)
if err != nil {
t.Fatal(err)
}
// wait for StopUnit job to complete
<-reschan
units, err = conn.ListUnits()
found = false
for _, u := range units {
if u.Name == target {
found = true
}
}
if found {
t.Fatalf("Test unit found in list, should be stopped")
}
}
func TestSocketActivation(t *testing.T) {
if !sd_util.IsRunningSystemd() {
t.Skip("Systemd is not running on the host.")
}
r := rand.New(rand.NewSource(time.Now().UnixNano()))
port, err := randomFreePort(t)
if err != nil {
t.Fatal(err)
}
echoImage := patchTestACI("rkt-inspect-echo.aci",
"--exec=/echo-socket-activated",
fmt.Sprintf("--ports=%d-tcp,protocol=tcp,port=%d,socketActivated=true", port, port))
defer os.Remove(echoImage)
ctx := testutils.NewRktRunCtx()
defer ctx.Cleanup()
conn, err := sd_dbus.New()
if err != nil {
t.Fatal(err)
}
rktTestingEchoService := `
[Unit]
Description=Socket-activated echo server
[Service]
ExecStart=%s
KillMode=process
`
rnd := r.Int()
// Write unit files directly to runtime system units directory
// (/run/systemd/system) to avoid calling LinkUnitFiles - it is buggy in
// systemd v219 as it does not work with absolute paths.
unitsDir := "/run/systemd/system"
cmd := fmt.Sprintf("%s --insecure-skip-verify run --mds-register=false %s", ctx.Cmd(), echoImage)
serviceContent := fmt.Sprintf(rktTestingEchoService, cmd)
serviceTargetBase := fmt.Sprintf("rkt-testing-socket-activation-%d.service", rnd)
serviceTarget := filepath.Join(unitsDir, serviceTargetBase)
if err := ioutil.WriteFile(serviceTarget, []byte(serviceContent), 0666); err != nil {
t.Fatal(err)
}
defer os.Remove(serviceTarget)
rktTestingEchoSocket := `
[Unit]
Description=Socket-activated netcat server socket
[Socket]
ListenStream=%d
`
socketContent := fmt.Sprintf(rktTestingEchoSocket, port)
socketTargetBase := fmt.Sprintf("rkt-testing-socket-activation-%d.socket", rnd)
socketTarget := filepath.Join(unitsDir, socketTargetBase)
if err := ioutil.WriteFile(socketTarget, []byte(socketContent), 0666); err != nil {
t.Fatal(err)
}
defer os.Remove(socketTarget)
reschan := make(chan string)
doJob := func() {
job := <-reschan
if job != "done" {
t.Fatal("Job is not done:", job)
}
}
if _, err := conn.StartUnit(socketTargetBase, "replace", reschan); err != nil {
t.Fatal(err)
}
doJob()
defer func() {
if _, err := conn.StopUnit(socketTargetBase, "replace", reschan); err != nil {
t.Fatal(err)
}
doJob()
if _, err := conn.StopUnit(serviceTargetBase, "replace", reschan); err != nil {
t.Fatal(err)
}
doJob()
}()
expected := "HELO\n"
sockConn, err := net.Dial("tcp", fmt.Sprintf("localhost:%d", port))
if err != nil {
t.Fatal(err)
}
if _, err := fmt.Fprintf(sockConn, expected); err != nil {
t.Fatal(err)
}
answer, err := bufio.NewReader(sockConn).ReadString('\n')
if err != nil {
t.Fatal(err)
}
if answer != expected {
t.Fatalf("Expected %q, Got %q", expected, answer)
}
return
}
// getArgsEnv returns the nspawn args and env according to the usr used
func getArgsEnv(p *Pod, flavor string, debug bool, n *networking.Networking) ([]string, []string, error) {
args := []string{}
env := os.Environ()
switch flavor {
case "kvm":
// kernel and lkvm are relative path, because init has /var/lib/rkt/..../uuid as its working directory
// TODO: move to path.go
kernelPath := filepath.Join(common.Stage1RootfsPath(p.Root), "bzImage")
lkvmPath := filepath.Join(common.Stage1RootfsPath(p.Root), "lkvm")
lkvmNetArgs, kernelNetParams, err := kvm.GetKVMNetArgs(n)
if err != nil {
return nil, nil, err
}
// TODO: base on resource isolators
cpu := 1
mem := 128
kernelParams := []string{
"console=hvc0",
"init=/usr/lib/systemd/systemd",
"no_timer_check",
"noreplace-smp",
"systemd.default_standard_error=journal+console",
"systemd.default_standard_output=journal+console",
strings.Join(kernelNetParams, " "),
// "systemd.default_standard_output=tty",
"tsc=reliable",
"MACHINEID=" + p.UUID.String(),
}
if debug {
kernelParams = append(kernelParams, []string{
"debug",
"systemd.log_level=debug",
"systemd.show_status=true",
// "systemd.confirm_spawn=true",
}...)
} else {
kernelParams = append(kernelParams, "quiet")
}
args = append(args, []string{
"./" + lkvmPath, // relative path
"run",
"--name", "rkt-" + p.UUID.String(),
"--no-dhcp", // speed bootup
"--cpu", strconv.Itoa(cpu),
"--mem", strconv.Itoa(mem),
"--console=virtio",
"--kernel", kernelPath,
"--disk", "stage1/rootfs", // relative to run/pods/uuid dir this is a place where systemd resides
// MACHINEID will be available as environment variable
"--params", strings.Join(kernelParams, " "),
}...,
)
args = append(args, lkvmNetArgs...)
if debug {
args = append(args, "--debug")
}
// host volume sharing with 9p
nsargs := kvm.VolumesToKvmDiskArgs(p.Manifest.Volumes)
args = append(args, nsargs...)
return args, env, nil
case "coreos":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), interpBin))
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
// use only dynamic libraries provided in the image
env = append(env, "LD_LIBRARY_PATH="+filepath.Join(common.Stage1RootfsPath(p.Root), "usr/lib"))
case "src":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
case "host":
hostNspawnBin, err := lookupPath("systemd-nspawn", os.Getenv("PATH"))
if err != nil {
return nil, nil, err
}
// Check dynamically which version is installed on the host
// Support version >= 220
versionBytes, err := exec.Command(hostNspawnBin, "--version").CombinedOutput()
if err != nil {
return nil, nil, fmt.Errorf("unable to probe %s version: %v", hostNspawnBin, err)
}
versionStr := strings.SplitN(string(versionBytes), "\n", 2)[0]
var version int
n, err := fmt.Sscanf(versionStr, "systemd %d", &version)
if err != nil {
return nil, nil, fmt.Errorf("cannot parse version: %q", versionStr)
}
if n != 1 || version < 220 {
return nil, nil, fmt.Errorf("rkt needs systemd-nspawn >= 220. %s version not supported: %v", hostNspawnBin, versionStr)
}
// Copy systemd, bash, etc. in stage1 at run-time
if err := installAssets(); err != nil {
return nil, nil, fmt.Errorf("cannot install assets from the host: %v", err)
}
args = append(args, hostNspawnBin)
args = append(args, "--boot") // Launch systemd in the pod
args = append(args, fmt.Sprintf("--register=true"))
default:
return nil, nil, fmt.Errorf("unrecognized stage1 flavor: %q", flavor)
}
// link journal only if the host is running systemd
if util.IsRunningSystemd() {
// we write /etc/machine-id here because systemd-nspawn needs it to link
// the container's journal to the host
mPath := filepath.Join(common.Stage1RootfsPath(p.Root), "etc", "machine-id")
mId := strings.Replace(p.UUID.String(), "-", "", -1)
if err := ioutil.WriteFile(mPath, []byte(mId), 0644); err != nil {
log.Fatalf("error writing /etc/machine-id: %v\n", err)
}
args = append(args, "--link-journal=try-guest")
}
if !debug {
args = append(args, "--quiet") // silence most nspawn output (log_warning is currently not covered by this)
env = append(env, "SYSTEMD_LOG_LEVEL=err") // silence log_warning too
}
keepUnit, err := isRunningFromUnitFile()
if err != nil {
return nil, nil, fmt.Errorf("error determining if we're running from a unit file: %v", err)
}
if keepUnit {
args = append(args, "--keep-unit")
}
nsargs, err := p.PodToNspawnArgs()
if err != nil {
return nil, nil, fmt.Errorf("Failed to generate nspawn args: %v", err)
}
args = append(args, nsargs...)
// Arguments to systemd
args = append(args, "--")
args = append(args, "--default-standard-output=tty") // redirect all service logs straight to tty
if !debug {
args = append(args, "--log-target=null") // silence systemd output inside pod
// TODO remove --log-level=warning when we update stage1 to systemd v222
args = append(args, "--log-level=warning") // limit log output (systemd-shutdown ignores --log-target)
args = append(args, "--show-status=0") // silence systemd initialization status output
}
return args, env, nil
}
// getArgsEnv returns the nspawn args and env according to the usr used
func getArgsEnv(p *Pod, flavor string, systemdStage1Version string, debug bool) ([]string, []string, error) {
args := []string{}
env := os.Environ()
switch flavor {
case "coreos":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), interpBin))
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
// use only dynamic libraries provided in the image
env = append(env, "LD_LIBRARY_PATH="+filepath.Join(common.Stage1RootfsPath(p.Root), "usr/lib"))
case "src":
args = append(args, filepath.Join(common.Stage1RootfsPath(p.Root), nspawnBin))
args = append(args, "--boot") // Launch systemd in the pod
switch systemdStage1Version {
case "v215":
lfd, err := common.GetRktLockFD()
if err != nil {
return nil, nil, err
}
args = append(args, fmt.Sprintf("--keep-fd=%v", lfd))
case "v219":
// --keep-fd is not needed thanks to
// stage1/rootfs/usr_from_src/patches/v219/0005-nspawn-close-extra-fds-before-execing-init.patch
default:
// since systemd-nspawn v220 (commit 6b7d2e, "nspawn: close extra fds
// before execing init"), fds remain open, so --keep-fd is not needed.
}
if machinedRegister() {
args = append(args, fmt.Sprintf("--register=true"))
} else {
args = append(args, fmt.Sprintf("--register=false"))
}
case "host":
hostNspawnBin, err := lookupPath("systemd-nspawn", os.Getenv("PATH"))
if err != nil {
return nil, nil, err
}
// Check dynamically which version is installed on the host
// Support version >= 220
versionBytes, err := exec.Command(hostNspawnBin, "--version").CombinedOutput()
if err != nil {
return nil, nil, fmt.Errorf("unable to probe %s version: %v", hostNspawnBin, err)
}
versionStr := strings.SplitN(string(versionBytes), "\n", 2)[0]
var version int
n, err := fmt.Sscanf(versionStr, "systemd %d", &version)
if err != nil {
return nil, nil, fmt.Errorf("cannot parse version: %q", versionStr)
}
if n != 1 || version < 220 {
return nil, nil, fmt.Errorf("rkt needs systemd-nspawn >= 220. %s version not supported: %v", hostNspawnBin, versionStr)
}
// Copy systemd, bash, etc. in stage1 at run-time
if err := installAssets(); err != nil {
return nil, nil, fmt.Errorf("cannot install assets from the host: %v", err)
}
args = append(args, hostNspawnBin)
args = append(args, "--boot") // Launch systemd in the pod
args = append(args, fmt.Sprintf("--register=true"))
default:
return nil, nil, fmt.Errorf("unrecognized stage1 flavor: %q", flavor)
}
// link journal only if the host is running systemd and stage1 supports
// linking
if util.IsRunningSystemd() && systemdSupportsJournalLinking(systemdStage1Version) {
// we write /etc/machine-id here because systemd-nspawn needs it to link
// the container's journal to the host
mPath := filepath.Join(common.Stage1RootfsPath(p.Root), "etc", "machine-id")
mId := strings.Replace(p.UUID.String(), "-", "", -1)
if err := ioutil.WriteFile(mPath, []byte(mId), 0644); err != nil {
log.Fatalf("error writing /etc/machine-id: %v\n", err)
}
args = append(args, "--link-journal=try-guest")
}
if !debug {
args = append(args, "--quiet") // silence most nspawn output (log_warning is currently not covered by this)
env = append(env, "SYSTEMD_LOG_LEVEL=err") // silence log_warning too
}
keepUnit, err := isRunningFromUnitFile()
if err != nil {
return nil, nil, fmt.Errorf("error determining if we're running from a unit file: %v", err)
}
if keepUnit {
args = append(args, "--keep-unit")
}
nsargs, err := p.PodToNspawnArgs()
if err != nil {
return nil, nil, fmt.Errorf("Failed to generate nspawn args: %v", err)
}
args = append(args, nsargs...)
// Arguments to systemd
args = append(args, "--")
args = append(args, "--default-standard-output=tty") // redirect all service logs straight to tty
if !debug {
args = append(args, "--log-target=null") // silence systemd output inside pod
// TODO remove --log-level=warning when we update stage1 to systemd v222
args = append(args, "--log-level=warning") // limit log output (systemd-shutdown ignores --log-target)
args = append(args, "--show-status=0") // silence systemd initialization status output
}
return args, env, nil
}