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docker_test.go
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package driver
import (
"fmt"
"io/ioutil"
"math/rand"
"os"
"path/filepath"
"reflect"
"runtime"
"runtime/debug"
"sort"
"strconv"
"strings"
"testing"
"time"
docker "github.com/fsouza/go-dockerclient"
"github.com/hashicorp/consul/lib/freeport"
sockaddr "github.com/hashicorp/go-sockaddr"
"github.com/hashicorp/nomad/client/allocdir"
"github.com/hashicorp/nomad/client/config"
"github.com/hashicorp/nomad/client/driver/env"
cstructs "github.com/hashicorp/nomad/client/structs"
"github.com/hashicorp/nomad/client/testutil"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/mock"
"github.com/hashicorp/nomad/nomad/structs"
tu "github.com/hashicorp/nomad/testutil"
"github.com/stretchr/testify/assert"
)
func dockerIsRemote(t *testing.T) bool {
client, err := docker.NewClientFromEnv()
if err != nil {
return false
}
// Technically this could be a local tcp socket but for testing purposes
// we'll just assume that tcp is only used for remote connections.
if client.Endpoint()[0:3] == "tcp" {
return true
}
return false
}
// Returns a task with a reserved and dynamic port. The ports are returned
// respectively.
func dockerTask(t *testing.T) (*structs.Task, int, int) {
ports := freeport.GetT(t, 2)
dockerReserved := ports[0]
dockerDynamic := ports[1]
return &structs.Task{
Name: "redis-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/nc",
"args": []string{"-l", "127.0.0.1", "-p", "0"},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
Networks: []*structs.NetworkResource{
{
IP: "127.0.0.1",
ReservedPorts: []structs.Port{{Label: "main", Value: dockerReserved}},
DynamicPorts: []structs.Port{{Label: "REDIS", Value: dockerDynamic}},
},
},
},
}, dockerReserved, dockerDynamic
}
// dockerSetup does all of the basic setup you need to get a running docker
// process up and running for testing. Use like:
//
// task := taskTemplate()
// // do custom task configuration
// client, handle, cleanup := dockerSetup(t, task)
// defer cleanup()
// // do test stuff
//
// If there is a problem during setup this function will abort or skip the test
// and indicate the reason.
func dockerSetup(t *testing.T, task *structs.Task) (*docker.Client, *DockerHandle, func()) {
client := newTestDockerClient(t)
return dockerSetupWithClient(t, task, client)
}
func testDockerDriverContexts(t *testing.T, task *structs.Task) *testContext {
tctx := testDriverContexts(t, task)
// Drop the delay
tctx.DriverCtx.config.Options = make(map[string]string)
tctx.DriverCtx.config.Options[dockerImageRemoveDelayConfigOption] = "1s"
return tctx
}
func dockerSetupWithClient(t *testing.T, task *structs.Task, client *docker.Client) (*docker.Client, *DockerHandle, func()) {
t.Helper()
tctx := testDockerDriverContexts(t, task)
//tctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
driver := NewDockerDriver(tctx.DriverCtx)
copyImage(t, tctx.ExecCtx.TaskDir, "busybox.tar")
presp, err := driver.Prestart(tctx.ExecCtx, task)
if err != nil {
driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
tctx.AllocDir.Destroy()
t.Fatalf("error in prestart: %v", err)
}
// Update the exec ctx with the driver network env vars
tctx.ExecCtx.TaskEnv = tctx.EnvBuilder.SetDriverNetwork(presp.Network).Build()
sresp, err := driver.Start(tctx.ExecCtx, task)
if err != nil {
driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
tctx.AllocDir.Destroy()
t.Fatalf("Failed to start driver: %s\nStack\n%s", err, debug.Stack())
}
if sresp.Handle == nil {
driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
tctx.AllocDir.Destroy()
t.Fatalf("handle is nil\nStack\n%s", debug.Stack())
}
// At runtime this is handled by TaskRunner
tctx.ExecCtx.TaskEnv = tctx.EnvBuilder.SetDriverNetwork(sresp.Network).Build()
cleanup := func() {
driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
sresp.Handle.Kill()
tctx.AllocDir.Destroy()
}
return client, sresp.Handle.(*DockerHandle), cleanup
}
func newTestDockerClient(t *testing.T) *docker.Client {
t.Helper()
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
client, err := docker.NewClientFromEnv()
if err != nil {
t.Fatalf("Failed to initialize client: %s\nStack\n%s", err, debug.Stack())
}
return client
}
// This test should always pass, even if docker daemon is not available
func TestDockerDriver_Fingerprint(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
ctx := testDockerDriverContexts(t, &structs.Task{Name: "foo", Driver: "docker", Resources: basicResources})
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
node := &structs.Node{
Attributes: make(map[string]string),
}
apply, err := d.Fingerprint(&config.Config{}, node)
if err != nil {
t.Fatalf("err: %v", err)
}
if apply != testutil.DockerIsConnected(t) {
t.Fatalf("Fingerprinter should detect when docker is available")
}
if node.Attributes["driver.docker"] != "1" {
t.Log("Docker daemon not available. The remainder of the docker tests will be skipped.")
}
t.Logf("Found docker version %s", node.Attributes["driver.docker.version"])
}
// TestDockerDriver_Fingerprint_Bridge asserts that if Docker is running we set
// the bridge network's IP as a node attribute. See #2785
func TestDockerDriver_Fingerprint_Bridge(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("requires Docker")
}
if runtime.GOOS != "linux" {
t.Skip("expect only on linux")
}
// This seems fragile, so we might need to reconsider this test if it
// proves flaky
expectedAddr, err := sockaddr.GetInterfaceIP("docker0")
if err != nil {
t.Fatalf("unable to get ip for docker0: %v", err)
}
if expectedAddr == "" {
t.Fatalf("unable to get ip for docker bridge")
}
conf := testConfig(t)
conf.Node = mock.Node()
dd := NewDockerDriver(NewDriverContext("", "", conf, conf.Node, testLogger(), nil))
ok, err := dd.Fingerprint(conf, conf.Node)
if err != nil {
t.Fatalf("error fingerprinting docker: %v", err)
}
if !ok {
t.Fatalf("expected Docker to be enabled but false was returned")
}
if found := conf.Node.Attributes["driver.docker.bridge_ip"]; found != expectedAddr {
t.Fatalf("expected bridge ip %q but found: %q", expectedAddr, found)
}
t.Logf("docker bridge ip: %q", conf.Node.Attributes["driver.docker.bridge_ip"])
}
func TestDockerDriver_StartOpen_Wait(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"load": "busybox.tar",
"image": "busybox",
"command": "/bin/nc",
"args": []string{"-l", "127.0.0.1", "-p", "0"},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: basicResources,
}
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
_, err := d.Prestart(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("error in prestart: %v", err)
}
resp, err := d.Start(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("err: %v", err)
}
if resp.Handle == nil {
t.Fatalf("missing handle")
}
defer resp.Handle.Kill()
// Attempt to open
resp2, err := d.Open(ctx.ExecCtx, resp.Handle.ID())
if err != nil {
t.Fatalf("err: %v", err)
}
if resp2 == nil {
t.Fatalf("missing handle")
}
}
func TestDockerDriver_Start_Wait(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"load": "busybox.tar",
"image": "busybox",
"command": "/bin/echo",
"args": []string{"hello"},
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
}
_, handle, cleanup := dockerSetup(t, task)
defer cleanup()
// Update should be a no-op
err := handle.Update(task)
if err != nil {
t.Fatalf("err: %v", err)
}
select {
case res := <-handle.WaitCh():
if !res.Successful() {
t.Fatalf("err: %v", res)
}
case <-time.After(time.Duration(tu.TestMultiplier()*5) * time.Second):
t.Fatalf("timeout")
}
}
// TestDockerDriver_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 TestDockerDriver_Start_StoppedContainer(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"load": "busybox.tar",
"image": "busybox",
"command": "sleep",
"args": []string{"9000"},
},
Resources: &structs.Resources{
MemoryMB: 100,
CPU: 100,
},
LogConfig: &structs.LogConfig{
MaxFiles: 1,
MaxFileSizeMB: 10,
},
}
tctx := testDockerDriverContexts(t, task)
defer tctx.AllocDir.Destroy()
copyImage(t, tctx.ExecCtx.TaskDir, "busybox.tar")
client := newTestDockerClient(t)
driver := NewDockerDriver(tctx.DriverCtx).(*DockerDriver)
driverConfig := &DockerDriverConfig{ImageName: "busybox", LoadImage: "busybox.tar"}
if _, err := driver.loadImage(driverConfig, client, tctx.ExecCtx.TaskDir); err != nil {
t.Fatalf("error loading image: %v", err)
}
// 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.
opts := docker.CreateContainerOptions{
Name: fmt.Sprintf("%s-%s", task.Name, tctx.DriverCtx.allocID),
Config: &docker.Config{
Image: "busybox",
Cmd: []string{"sleep", "9000"},
},
}
if _, err := client.CreateContainer(opts); err != nil {
t.Fatalf("error creating initial container: %v", err)
}
// Now assert that the driver can still start normally
presp, err := driver.Prestart(tctx.ExecCtx, task)
if err != nil {
driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
t.Fatalf("error in prestart: %v", err)
}
defer driver.Cleanup(tctx.ExecCtx, presp.CreatedResources)
sresp, err := driver.Start(tctx.ExecCtx, task)
if err != nil {
t.Fatalf("failed to start driver: %s", err)
}
handle := sresp.Handle.(*DockerHandle)
waitForExist(t, client, handle)
handle.Kill()
}
func TestDockerDriver_Start_LoadImage(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "busybox-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/sh",
"args": []string{
"-c",
"echo hello > $NOMAD_TASK_DIR/output",
},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
}
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
// Copy the image into the task's directory
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
_, err := d.Prestart(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("error in prestart: %v", err)
}
resp, err := d.Start(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("err: %v", err)
}
defer resp.Handle.Kill()
select {
case res := <-resp.Handle.WaitCh():
if !res.Successful() {
t.Fatalf("err: %v", res)
}
case <-time.After(time.Duration(tu.TestMultiplier()*5) * time.Second):
t.Fatalf("timeout")
}
// Check that data was written to the shared alloc directory.
outputFile := filepath.Join(ctx.ExecCtx.TaskDir.LocalDir, "output")
act, err := ioutil.ReadFile(outputFile)
if err != nil {
t.Fatalf("Couldn't read expected output: %v", err)
}
exp := "hello"
if strings.TrimSpace(string(act)) != exp {
t.Fatalf("Command outputted %v; want %v", act, exp)
}
}
func TestDockerDriver_Start_BadPull_Recoverable(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "busybox-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "127.0.1.1:32121/foo", // bad path
"command": "/bin/echo",
"args": []string{
"hello",
},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
}
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
_, err := d.Prestart(ctx.ExecCtx, task)
if err == nil {
t.Fatalf("want error in prestart: %v", err)
}
if rerr, ok := err.(*structs.RecoverableError); !ok {
t.Fatalf("want recoverable error: %+v", err)
} else if !rerr.IsRecoverable() {
t.Fatalf("error not recoverable: %+v", err)
}
}
func TestDockerDriver_Start_Wait_AllocDir(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
// This test requires that the alloc dir be mounted into docker as a volume.
// Because this cannot happen when docker is run remotely, e.g. when running
// docker in a VM, we skip this when we detect Docker is being run remotely.
if !testutil.DockerIsConnected(t) || dockerIsRemote(t) {
t.Skip("Docker not connected")
}
exp := []byte{'w', 'i', 'n'}
file := "output.txt"
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/sh",
"args": []string{
"-c",
fmt.Sprintf(`sleep 1; echo -n %s > $%s/%s`,
string(exp), env.AllocDir, file),
},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
}
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
_, err := d.Prestart(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("error in prestart: %v", err)
}
resp, err := d.Start(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("err: %v", err)
}
defer resp.Handle.Kill()
select {
case res := <-resp.Handle.WaitCh():
if !res.Successful() {
t.Fatalf("err: %v", res)
}
case <-time.After(time.Duration(tu.TestMultiplier()*5) * time.Second):
t.Fatalf("timeout")
}
// Check that data was written to the shared alloc directory.
outputFile := filepath.Join(ctx.AllocDir.SharedDir, file)
act, err := ioutil.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)
}
}
func TestDockerDriver_Start_Kill_Wait(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/sleep",
"args": []string{"10"},
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
Resources: basicResources,
}
_, handle, cleanup := dockerSetup(t, task)
defer cleanup()
go func() {
time.Sleep(100 * time.Millisecond)
err := handle.Kill()
if err != nil {
t.Fatalf("err: %v", err)
}
}()
select {
case res := <-handle.WaitCh():
if res.Successful() {
t.Fatalf("should err: %v", res)
}
case <-time.After(time.Duration(tu.TestMultiplier()*10) * time.Second):
t.Fatalf("timeout")
}
}
func TestDockerDriver_StartN(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task1, _, _ := dockerTask(t)
task2, _, _ := dockerTask(t)
task3, _, _ := dockerTask(t)
taskList := []*structs.Task{task1, task2, task3}
handles := make([]DriverHandle, len(taskList))
t.Logf("Starting %d tasks", len(taskList))
// Let's spin up a bunch of things
for idx, task := range taskList {
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
_, err := d.Prestart(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("error in prestart #%d: %v", idx+1, err)
}
resp, err := d.Start(ctx.ExecCtx, task)
if err != nil {
t.Errorf("Failed starting task #%d: %s", idx+1, err)
continue
}
handles[idx] = resp.Handle
}
t.Log("All tasks are started. Terminating...")
for idx, handle := range handles {
if handle == nil {
t.Errorf("Bad handle for task #%d", idx+1)
continue
}
err := handle.Kill()
if err != nil {
t.Errorf("Failed stopping task #%d: %s", idx+1, err)
}
}
t.Log("Test complete!")
}
func TestDockerDriver_StartNVersions(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task1, _, _ := dockerTask(t)
task1.Config["image"] = "busybox"
task1.Config["load"] = "busybox.tar"
task2, _, _ := dockerTask(t)
task2.Config["image"] = "busybox:musl"
task2.Config["load"] = "busybox_musl.tar"
task3, _, _ := dockerTask(t)
task3.Config["image"] = "busybox:glibc"
task3.Config["load"] = "busybox_glibc.tar"
taskList := []*structs.Task{task1, task2, task3}
handles := make([]DriverHandle, len(taskList))
t.Logf("Starting %d tasks", len(taskList))
// Let's spin up a bunch of things
for idx, task := range taskList {
ctx := testDockerDriverContexts(t, task)
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
defer ctx.AllocDir.Destroy()
d := NewDockerDriver(ctx.DriverCtx)
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
copyImage(t, ctx.ExecCtx.TaskDir, "busybox_musl.tar")
copyImage(t, ctx.ExecCtx.TaskDir, "busybox_glibc.tar")
_, err := d.Prestart(ctx.ExecCtx, task)
if err != nil {
t.Fatalf("error in prestart #%d: %v", idx+1, err)
}
resp, err := d.Start(ctx.ExecCtx, task)
if err != nil {
t.Errorf("Failed starting task #%d: %s", idx+1, err)
continue
}
handles[idx] = resp.Handle
}
t.Log("All tasks are started. Terminating...")
for idx, handle := range handles {
if handle == nil {
t.Errorf("Bad handle for task #%d", idx+1)
continue
}
err := handle.Kill()
if err != nil {
t.Errorf("Failed stopping task #%d: %s", idx+1, err)
}
}
t.Log("Test complete!")
}
func waitForExist(t *testing.T, client *docker.Client, handle *DockerHandle) {
handle.logger.Printf("[DEBUG] docker.test: waiting for container %s to exist...", handle.ContainerID())
tu.WaitForResult(func() (bool, error) {
container, err := client.InspectContainer(handle.ContainerID())
if err != nil {
if _, ok := err.(*docker.NoSuchContainer); !ok {
return false, err
}
}
return container != nil, nil
}, func(err error) {
t.Fatalf("err: %v", err)
})
handle.logger.Printf("[DEBUG] docker.test: ...container %s exists!", handle.ContainerID())
}
func TestDockerDriver_NetworkMode_Host(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
expected := "host"
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/nc",
"args": []string{"-l", "127.0.0.1", "-p", "0"},
"network_mode": expected,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
}
client, handle, cleanup := dockerSetup(t, task)
defer cleanup()
waitForExist(t, client, handle)
container, err := client.InspectContainer(handle.ContainerID())
if err != nil {
t.Fatalf("err: %v", err)
}
actual := container.HostConfig.NetworkMode
if actual != expected {
t.Fatalf("Got network mode %q; want %q", expected, actual)
}
}
func TestDockerDriver_NetworkAliases_Bridge(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
// Because go-dockerclient doesn't provide api for query network aliases, just check that
// a container can be created with a 'network_aliases' property
// Create network, network-scoped alias is supported only for containers in user defined networks
client := newTestDockerClient(t)
networkOpts := docker.CreateNetworkOptions{Name: "foobar", Driver: "bridge"}
network, err := client.CreateNetwork(networkOpts)
if err != nil {
t.Fatalf("err: %v", err)
}
defer client.RemoveNetwork(network.ID)
expected := []string{"foobar"}
task := &structs.Task{
Name: "nc-demo",
Driver: "docker",
Config: map[string]interface{}{
"image": "busybox",
"load": "busybox.tar",
"command": "/bin/nc",
"args": []string{"-l", "127.0.0.1", "-p", "0"},
"network_mode": network.Name,
"network_aliases": expected,
},
Resources: &structs.Resources{
MemoryMB: 256,
CPU: 512,
},
LogConfig: &structs.LogConfig{
MaxFiles: 10,
MaxFileSizeMB: 10,
},
}
client, handle, cleanup := dockerSetupWithClient(t, task, client)
defer cleanup()
waitForExist(t, client, handle)
_, err = client.InspectContainer(handle.ContainerID())
if err != nil {
t.Fatalf("err: %v", err)
}
}
func TestDockerDriver_Sysctl_Ulimit(t *testing.T) {
task, _, _ := dockerTask(t)
expectedUlimits := map[string]string{
"nproc": "4242",
"nofile": "2048:4096",
}
task.Config["sysctl"] = []map[string]string{
{
"net.core.somaxconn": "16384",
},
}
task.Config["ulimit"] = []map[string]string{
expectedUlimits,
}
client, handle, cleanup := dockerSetup(t, task)
defer cleanup()
waitForExist(t, client, handle)
container, err := client.InspectContainer(handle.ContainerID())
assert.Nil(t, err, "unexpected error: %v", err)
want := "16384"
got := container.HostConfig.Sysctls["net.core.somaxconn"]
assert.Equal(t, want, got, "Wrong net.core.somaxconn config for docker job. Expect: %s, got: %s", want, got)
expectedUlimitLen := 2
actualUlimitLen := len(container.HostConfig.Ulimits)
assert.Equal(t, want, got, "Wrong number of ulimit configs for docker job. Expect: %d, got: %d", expectedUlimitLen, actualUlimitLen)
for _, got := range container.HostConfig.Ulimits {
if expectedStr, ok := expectedUlimits[got.Name]; !ok {
t.Errorf("%s config unexpected for docker job.", got.Name)
} else {
if !strings.Contains(expectedStr, ":") {
expectedStr = expectedStr + ":" + expectedStr
}
splitted := strings.SplitN(expectedStr, ":", 2)
soft, _ := strconv.Atoi(splitted[0])
hard, _ := strconv.Atoi(splitted[1])
assert.Equal(t, int64(soft), got.Soft, "Wrong soft %s ulimit for docker job. Expect: %d, got: %d", got.Name, soft, got.Soft)
assert.Equal(t, int64(hard), got.Hard, "Wrong hard %s ulimit for docker job. Expect: %d, got: %d", got.Name, hard, got.Hard)
}
}
}
func TestDockerDriver_Sysctl_Ulimit_Errors(t *testing.T) {
brokenConfigs := []interface{}{
map[string]interface{}{
"nofile": "",
},
map[string]interface{}{
"nofile": "abc:1234",
},
map[string]interface{}{
"nofile": "1234:abc",
},
}
test_cases := []struct {
ulimitConfig interface{}
err error
}{
{[]interface{}{brokenConfigs[0]}, fmt.Errorf("Malformed ulimit specification nofile: \"\", cannot be empty")},
{[]interface{}{brokenConfigs[1]}, fmt.Errorf("Malformed soft ulimit nofile: abc:1234")},
{[]interface{}{brokenConfigs[2]}, fmt.Errorf("Malformed hard ulimit nofile: 1234:abc")},
}
for _, tc := range test_cases {
task, _, _ := dockerTask(t)
task.Config["ulimit"] = tc.ulimitConfig
ctx := testDockerDriverContexts(t, task)
driver := NewDockerDriver(ctx.DriverCtx)
copyImage(t, ctx.ExecCtx.TaskDir, "busybox.tar")
defer ctx.AllocDir.Destroy()
_, err := driver.Prestart(ctx.ExecCtx, task)
assert.NotNil(t, err, "Expected non nil error")
assert.Equal(t, err.Error(), tc.err.Error(), "unexpected error in prestart, got %v, expected %v", err, tc.err)
}
}
func TestDockerDriver_Labels(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task, _, _ := dockerTask(t)
task.Config["labels"] = []map[string]string{
{
"label1": "value1",
"label2": "value2",
},
}
client, handle, cleanup := dockerSetup(t, task)
defer cleanup()
waitForExist(t, client, handle)
container, err := client.InspectContainer(handle.ContainerID())
if err != nil {
t.Fatalf("err: %v", err)
}
if want, got := 2, len(container.Config.Labels); want != got {
t.Errorf("Wrong labels count for docker job. Expect: %d, got: %d", want, got)
}
if want, got := "value1", container.Config.Labels["label1"]; want != got {
t.Errorf("Wrong label value docker job. Expect: %s, got: %s", want, got)
}
}
func TestDockerDriver_ForcePull_IsInvalidConfig(t *testing.T) {
if !tu.IsTravis() {
t.Parallel()
}
if !testutil.DockerIsConnected(t) {
t.Skip("Docker not connected")
}
task, _, _ := dockerTask(t)
task.Config["force_pull"] = "nothing"
ctx := testDockerDriverContexts(t, task)
defer ctx.AllocDir.Destroy()
//ctx.DriverCtx.config.Options = map[string]string{"docker.cleanup.image": "false"}
driver := NewDockerDriver(ctx.DriverCtx)
if _, err := driver.Prestart(ctx.ExecCtx, task); err == nil {
t.Fatalf("error expected in prestart")
}