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driver_test.go
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driver_test.go
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package main
import (
"context"
"fmt"
"os"
"os/exec"
"path/filepath"
"reflect"
"runtime"
"strconv"
"strings"
"testing"
"time"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/nomad-driver-podman/api"
"github.com/hashicorp/nomad/client/taskenv"
"github.com/hashicorp/nomad/helper/freeport"
"github.com/hashicorp/nomad/helper/testlog"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/nomad/plugins/base"
"github.com/hashicorp/nomad/plugins/drivers"
dtestutil "github.com/hashicorp/nomad/plugins/drivers/testutils"
tu "github.com/hashicorp/nomad/testutil"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/stretchr/testify/require"
)
var (
// busyboxLongRunningCmd is a busybox command that runs indefinitely, and
// ideally responds to SIGINT/SIGTERM. Sadly, busybox:1.29.3 /bin/sleep doesn't.
busyboxLongRunningCmd = []string{"nc", "-l", "-p", "3000", "127.0.0.1"}
)
func createBasicResources() *drivers.Resources {
res := drivers.Resources{
NomadResources: &structs.AllocatedTaskResources{
Memory: structs.AllocatedMemoryResources{
MemoryMB: 100,
},
Cpu: structs.AllocatedCpuResources{
CpuShares: 250,
},
},
LinuxResources: &drivers.LinuxResources{
CPUPeriod: 100000,
CPUQuota: 100000,
CPUShares: 500,
MemoryLimitBytes: 256 * 1024 * 1024,
PercentTicks: float64(500) / float64(2000),
},
}
return &res
}
// podmanDriverHarness wires up everything needed to launch a task with a podman driver.
// A driver plugin interface and cleanup function is returned
func podmanDriverHarness(t *testing.T, cfg map[string]interface{}) *dtestutil.DriverHarness {
logger := testlog.HCLogger(t)
if testing.Verbose() {
logger.SetLevel(hclog.Trace)
} else {
logger.SetLevel(hclog.Info)
}
baseConfig := base.Config{}
pluginConfig := PluginConfig{}
if err := base.MsgPackEncode(&baseConfig.PluginConfig, &pluginConfig); err != nil {
t.Error("Unable to encode plugin config", err)
}
d := NewPodmanDriver(logger).(*Driver)
require.NoError(t, d.SetConfig(&baseConfig))
d.buildFingerprint()
d.config.Volumes.Enabled = true
if enforce, err := os.ReadFile("/sys/fs/selinux/enforce"); err == nil {
if string(enforce) == "1" {
d.logger.Info("Enabling SelinuxLabel")
d.config.Volumes.SelinuxLabel = "z"
}
}
d.config.GC.Container = true
if v, ok := cfg["GC.Container"]; ok {
if bv, ok := v.(bool); ok {
d.config.GC.Container = bv
}
}
harness := dtestutil.NewDriverHarness(t, d)
return harness
}
func TestPodmanDriver_PingPodman(t *testing.T) {
d := podmanDriverHarness(t, nil)
version, err := getPodmanDriver(t, d).podman.Ping(context.Background())
require.NoError(t, err)
require.NotEmpty(t, version)
}
func TestPodmanDriver_Start_NoImage(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := TaskConfig{
Command: "echo",
Args: []string{"foo"},
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "echo",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, false)
defer cleanup()
_, _, err := d.StartTask(task)
require.Error(t, err)
require.Contains(t, err.Error(), "image name required")
_ = d.DestroyTask(task.ID, true)
}
// start a long running container
func TestPodmanDriver_Start_Wait(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "start_wait",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
t.Fatalf("wait channel should not have received an exit result")
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
}
}
// test a short-living container
func TestPodmanDriver_Start_WaitFinish(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", []string{"echo", "hello"})
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "start_waitfinish",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case res := <-waitCh:
if !res.Successful() {
require.Fail(t, "ExitResult should be successful: %v", res)
}
case <-time.After(time.Duration(tu.TestMultiplier()*5) * time.Second):
require.Fail(t, "timeout")
}
}
// TestPodmanDriver_Start_StoppedContainer asserts that Nomad will detect a
// stopped task container, remove it, and start a new container.
//
// See https://github.com/hashicorp/nomad/issues/3419
func TestPodmanDriver_Start_StoppedContainer(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", []string{"sleep", "5"})
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "start_stoppedContainer",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
// Create a container of the same name but don't start it. This mimics
// the case of dockerd getting restarted and stopping containers while
// Nomad is watching them.
containerName := BuildContainerName(task)
createOpts := api.SpecGenerator{}
createOpts.ContainerBasicConfig.Name = containerName
createOpts.ContainerStorageConfig.Image = taskCfg.Image
createOpts.ContainerBasicConfig.Command = []string{
"sleep",
"5",
}
_, err := getPodmanDriver(t, d).podman.ContainerCreate(context.Background(), createOpts)
require.NoError(t, err)
_, _, err = d.StartTask(task)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
require.NoError(t, err)
require.NoError(t, d.WaitUntilStarted(task.ID, 5*time.Second))
require.NoError(t, d.DestroyTask(task.ID, true))
}
func TestPodmanDriver_Start_Wait_AllocDir(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
exp := []byte{'w', 'i', 'n'}
file := "output.txt"
taskCfg := newTaskConfig("", []string{
"sh",
"-c",
fmt.Sprintf(`echo -n %s > $%s/%s`,
string(exp), taskenv.AllocDir, file),
})
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "start_wait_allocDir",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case res := <-waitCh:
if !res.Successful() {
require.Fail(t, fmt.Sprintf("ExitResult should be successful: %v", res))
}
case <-time.After(time.Duration(tu.TestMultiplier()*5) * time.Second):
require.Fail(t, "timeout")
}
// Check that data was written to the shared alloc directory.
outputFile := filepath.Join(task.TaskDir().SharedAllocDir, file)
act, err := os.ReadFile(outputFile)
if err != nil {
t.Fatalf("Couldn't read expected output: %v", err)
}
if !reflect.DeepEqual(act, exp) {
t.Fatalf("Command outputted %v; want %v", act, exp)
}
}
// check if container is destroyed if gc.container=true
func TestPodmanDriver_GC_Container_on(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "gc_container_on",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
containerName := BuildContainerName(task)
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
t.Fatalf("wait channel should not have received an exit result")
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
}
_ = d.DestroyTask(task.ID, true)
// see if the container does not exist (404)
_, err = getPodmanDriver(t, d).podman.ContainerStats(context.Background(), containerName)
require.Error(t, err, api.ContainerNotFound)
}
// check if container is destroyed if gc.container=false
func TestPodmanDriver_GC_Container_off(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "gc_container_off",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
opts := make(map[string]interface{})
opts["GC.Container"] = false
d := podmanDriverHarness(t, opts)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
containerName := BuildContainerName(task)
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
t.Fatalf("wait channel should not have received an exit result")
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
}
_ = d.DestroyTask(task.ID, true)
// see if the stopped container can be inspected
_, err = getPodmanDriver(t, d).podman.ContainerInspect(context.Background(), containerName)
require.NoError(t, err)
// and cleanup after ourself
err = getPodmanDriver(t, d).podman.ContainerDelete(context.Background(), containerName, true, true)
require.NoError(t, err)
}
// Check log_opt=journald logger
func TestPodmanDriver_logJournald(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
stdoutMagic := uuid.Generate()
stderrMagic := uuid.Generate()
taskCfg := newTaskConfig("", []string{
"sh",
"-c",
fmt.Sprintf("echo %s; 1>&2 echo %s", stdoutMagic, stderrMagic),
})
taskCfg.Logging.Driver = "journald"
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "logJournald",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
t.Fatalf("Container did not exit in time")
}
stdoutLog := readStdoutLog(t, task)
require.Contains(t, stdoutLog, stdoutMagic, "stdoutMagic in stdout")
require.NotContains(t, stdoutLog, stderrMagic, "stderrMagic NOT in stdout")
stderrLog := readStderrLog(t, task)
require.Contains(t, stderrLog, stderrMagic, "stderrMagic in stderr")
require.NotContains(t, stderrLog, stdoutMagic, "stderrMagic NOT in stderr")
}
// Check log_opt=nomad logger
func TestPodmanDriver_logNomad(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
stdoutMagic := uuid.Generate()
stderrMagic := uuid.Generate()
taskCfg := newTaskConfig("", []string{
"sh",
"-c",
fmt.Sprintf("echo %s; 1>&2 echo %s", stdoutMagic, stderrMagic),
})
taskCfg.Logging.Driver = "nomad"
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "logNomad",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
t.Fatalf("Container did not exit in time")
}
// log_driver=nomad combines both streams into stdout, so we will find both
// magic values in the same stream
stdoutLog := readStdoutLog(t, task)
require.Contains(t, stdoutLog, stdoutMagic, "stdoutMagic in stdout")
require.Contains(t, stdoutLog, stderrMagic, "stderrMagic in stdout")
}
// check hostname task config options
func TestPodmanDriver_Hostname(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", []string{
// print hostname to stdout
"hostname",
})
shouldHaveHostname := "host_" + uuid.Generate()
// populate Hostname option in task configuration
taskCfg.Hostname = shouldHaveHostname
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "stdout",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
t.Fatalf("Container did not exit in time")
}
// check if the hostname was visible in the container
tasklog := readStdoutLog(t, task)
require.Contains(t, tasklog, shouldHaveHostname)
}
// check port_map feature
func TestPodmanDriver_PortMap(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
ports := freeport.MustTake(2)
defer freeport.Return(ports)
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
taskCfg.PortMap = map[string]int{
"main": 8888,
"REDIS": 6379,
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "portmap",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
task.Resources.NomadResources.Networks = []*structs.NetworkResource{
{
IP: "127.0.0.1",
ReservedPorts: []structs.Port{{Label: "main", Value: ports[0]}},
DynamicPorts: []structs.Port{{Label: "REDIS", Value: ports[1]}},
},
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
containerName := BuildContainerName(task)
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
inspectData, err := getPodmanDriver(t, d).podman.ContainerInspect(context.Background(), containerName)
require.NoError(t, err)
// Verify that the port environment variables are set
require.Contains(t, inspectData.Config.Env, "NOMAD_PORT_main=8888")
require.Contains(t, inspectData.Config.Env, "NOMAD_PORT_REDIS=6379")
// Verify that the correct ports are bound
expectedPortBindings := map[string][]api.InspectHostPort{
"8888/tcp": {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[0]),
}},
"8888/udp": {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[0]),
}},
"6379/tcp": {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[1]),
}},
"6379/udp": {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[1]),
}},
// FIXME: REDIS UDP
}
require.Exactly(t, expectedPortBindings, inspectData.HostConfig.PortBindings)
}
func TestPodmanDriver_Ports(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
ports := freeport.MustTake(2)
defer freeport.Return(ports)
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
taskCfg.Ports = []string{
"redis",
"other",
}
hostIP := "127.0.0.1"
resources := createBasicResources()
resources.Ports = &structs.AllocatedPorts{
{
Label: "redis",
HostIP: hostIP,
To: 8888,
Value: ports[0],
},
{
Label: "other",
HostIP: hostIP,
Value: ports[1],
},
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "ports",
AllocID: uuid.Generate(),
Resources: resources,
}
task.Resources.NomadResources.Networks = []*structs.NetworkResource{
{
IP: "127.0.0.1",
DynamicPorts: []structs.Port{
{Label: "redis", Value: ports[0]},
{Label: "other", Value: ports[1]},
},
},
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
containerName := BuildContainerName(task)
_, _, err := d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
inspectData, err := getPodmanDriver(t, d).podman.ContainerInspect(context.Background(), containerName)
require.NoError(t, err)
require.Contains(t, inspectData.Config.Env, fmt.Sprintf("NOMAD_PORT_redis=%d", ports[0]))
require.Len(t, inspectData.HostConfig.PortBindings, 4)
expectedPortBindings := map[string][]api.InspectHostPort{
fmt.Sprintf("%d/tcp", 8888): {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[0]),
}},
fmt.Sprintf("%d/udp", 8888): {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[0]),
}},
fmt.Sprintf("%d/tcp", ports[1]): {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[1]),
}},
fmt.Sprintf("%d/udp", ports[1]): {{
HostIP: "127.0.0.1",
HostPort: strconv.Itoa(ports[1]),
}},
}
require.Exactly(t, expectedPortBindings, inspectData.HostConfig.PortBindings)
}
func TestPodmanDriver_Ports_MissingFromGroup(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
ports := freeport.MustTake(1)
defer freeport.Return(ports)
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
taskCfg.Ports = []string{
"redis",
"missing",
}
hostIP := "127.0.0.1"
resources := createBasicResources()
resources.Ports = &structs.AllocatedPorts{
{
Label: "redis",
HostIP: hostIP,
Value: ports[0],
},
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "ports",
AllocID: uuid.Generate(),
Resources: resources,
}
task.Resources.NomadResources.Networks = []*structs.NetworkResource{
{
IP: "127.0.0.1",
DynamicPorts: []structs.Port{
{Label: "redis", Value: ports[0]},
},
},
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.Error(t, err)
require.Contains(t, err.Error(), "Port \"missing\" not found, check network stanza")
}
func TestPodmanDriver_Ports_MissingDriverConfig(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
ports := freeport.MustTake(1)
defer freeport.Return(ports)
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
taskCfg.Ports = []string{
"redis",
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "ports",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
task.Resources.NomadResources.Networks = []*structs.NetworkResource{
{
IP: "127.0.0.1",
DynamicPorts: []structs.Port{
{Label: "redis", Value: ports[0]},
},
},
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.Error(t, err)
require.Contains(t, err.Error(), "No ports defined in network stanza")
}
func TestPodmanDriver_Ports_WithPortMap(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
ports := freeport.MustTake(1)
defer freeport.Return(ports)
taskCfg := newTaskConfig("", busyboxLongRunningCmd)
taskCfg.Ports = []string{
"redis",
}
taskCfg.PortMap = map[string]int{
"main": 8888,
"REDIS": 6379,
}
hostIP := "127.0.0.1"
resources := createBasicResources()
resources.Ports = &structs.AllocatedPorts{
{
Label: "redis",
HostIP: hostIP,
To: 8888,
Value: ports[0],
},
}
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "ports",
AllocID: uuid.Generate(),
Resources: resources,
}
task.Resources.NomadResources.Networks = []*structs.NetworkResource{
{
IP: "127.0.0.1",
DynamicPorts: []structs.Port{
{Label: "redis", Value: ports[0]},
},
},
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err := d.StartTask(task)
require.Error(t, err)
require.Contains(t, err.Error(), "Invalid port declaration; use of port_map and ports")
}
// check --init with default path
func TestPodmanDriver_Init(t *testing.T) {
if !tu.IsCI() {
t.Parallel()
}
// only test --init if catatonit is installed
initPath := "/usr/libexec/podman/catatonit"
_, err := os.Stat(initPath)
if os.IsNotExist(err) {
path, err := exec.LookPath("catatonit")
if err != nil {
t.Skip("Skipping --init test because catatonit is not installed")
return
}
initPath = path
}
taskCfg := newTaskConfig("", []string{
// print pid 1 filename to stdout
"realpath",
"/proc/1/exe",
})
// enable --init
taskCfg.Init = true
taskCfg.InitPath = initPath
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "init",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err = d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case <-waitCh:
case <-time.After(time.Duration(tu.TestMultiplier()*2) * time.Second):
t.Fatalf("Container did not exit in time")
}
// podman maps init process to /dev/init, so we should see this
tasklog := readStdoutLog(t, task)
require.Contains(t, tasklog, "/dev/init")
}
// test oom flag propagation
func TestPodmanDriver_OOM(t *testing.T) {
t.Skip("Skipping oom test because of podman cgroup v2 bugs")
if !tu.IsCI() {
t.Parallel()
}
taskCfg := newTaskConfig("", []string{
// Incrementally creates a bigger and bigger variable.
"sh",
"-c",
"tail /dev/zero",
})
// only enable init if catatonit is installed
initPath := "/usr/libexec/podman/catatonit"
_, err := os.Stat(initPath)
if os.IsNotExist(err) {
path, err := exec.LookPath("catatonit")
if err != nil {
t.Skip("Skipping oom test because catatonit is not installed")
return
}
initPath = path
}
taskCfg.Init = true
taskCfg.InitPath = initPath
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "oom",
AllocID: uuid.Generate(),
Resources: createBasicResources(),
}
// limit memory to 5MB to trigger oom soon enough
task.Resources.NomadResources.Memory.MemoryMB = 10
require.NoError(t, task.EncodeConcreteDriverConfig(&taskCfg))
d := podmanDriverHarness(t, nil)
cleanup := d.MkAllocDir(task, true)
defer cleanup()
_, _, err = d.StartTask(task)
require.NoError(t, err)
defer func() {
_ = d.DestroyTask(task.ID, true)
}()
// Attempt to wait
waitCh, err := d.WaitTask(context.Background(), task.ID)
require.NoError(t, err)
select {
case res := <-waitCh:
require.False(t, res.Successful(), "Should have failed because of oom but was successful")
require.True(t, res.OOMKilled, "OOM Flag not set")