343 lines
10 KiB
Go
343 lines
10 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package integration provides end-to-end integration tests for runsc.
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//
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// Each test calls docker commands to start up a container, and tests that it is
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// behaving properly, with various runsc commands. The container is killed and
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// deleted at the end.
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//
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// Setup instruction in runsc/test/README.md.
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package integration
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import (
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"fmt"
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"net"
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"net/http"
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"os"
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"strconv"
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"strings"
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"syscall"
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"testing"
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"time"
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"gvisor.googlesource.com/gvisor/runsc/test/testutil"
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)
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// httpRequestSucceeds sends a request to a given url and checks that the status is OK.
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func httpRequestSucceeds(client http.Client, server string, port int) error {
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url := fmt.Sprintf("http://%s:%d", server, port)
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// Ensure that content is being served.
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resp, err := client.Get(url)
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if err != nil {
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return fmt.Errorf("error reaching http server: %v", err)
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}
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if want := http.StatusOK; resp.StatusCode != want {
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return fmt.Errorf("wrong response code, got: %d, want: %d", resp.StatusCode, want)
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}
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return nil
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}
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// TestLifeCycle tests a basic Create/Start/Stop docker container life cycle.
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func TestLifeCycle(t *testing.T) {
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if err := testutil.Pull("nginx"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("lifecycle-test")
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if err := d.Create("-p", "80", "nginx"); err != nil {
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t.Fatal("docker create failed:", err)
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}
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if err := d.Start(); err != nil {
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d.CleanUp()
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t.Fatal("docker start failed:", err)
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}
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// Test that container is working
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port, err := d.FindPort(80)
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if err != nil {
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t.Fatal("docker.FindPort(80) failed: ", err)
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}
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if err := testutil.WaitForHTTP(port, 30*time.Second); err != nil {
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t.Fatal("WaitForHTTP() timeout:", err)
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}
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client := http.Client{Timeout: time.Duration(2 * time.Second)}
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if err := httpRequestSucceeds(client, "localhost", port); err != nil {
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t.Error("http request failed:", err)
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}
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if err := d.Stop(); err != nil {
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d.CleanUp()
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t.Fatal("docker stop failed:", err)
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}
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if err := d.Remove(); err != nil {
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t.Fatal("docker rm failed:", err)
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}
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}
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func TestPauseResume(t *testing.T) {
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if !testutil.IsPauseResumeSupported() {
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t.Log("Pause/resume is not supported, skipping test.")
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return
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}
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if err := testutil.Pull("google/python-hello"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("pause-resume-test")
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if err := d.Run("-p", "8080", "google/python-hello"); err != nil {
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t.Fatalf("docker run failed: %v", err)
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}
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defer d.CleanUp()
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// Find where port 8080 is mapped to.
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port, err := d.FindPort(8080)
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if err != nil {
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t.Fatal("docker.FindPort(8080) failed:", err)
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}
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// Wait until it's up and running.
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if err := testutil.WaitForHTTP(port, 30*time.Second); err != nil {
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t.Fatal("WaitForHTTP() timeout:", err)
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}
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// Check that container is working.
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client := http.Client{Timeout: time.Duration(2 * time.Second)}
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if err := httpRequestSucceeds(client, "localhost", port); err != nil {
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t.Error("http request failed:", err)
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}
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if err := d.Pause(); err != nil {
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t.Fatal("docker pause failed:", err)
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}
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// Check if container is paused.
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switch _, err := client.Get(fmt.Sprintf("http://localhost:%d", port)); v := err.(type) {
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case nil:
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t.Errorf("http req expected to fail but it succeeded")
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case net.Error:
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if !v.Timeout() {
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t.Errorf("http req got error %v, wanted timeout", v)
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}
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default:
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t.Errorf("http req got unexpected error %v", v)
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}
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if err := d.Unpause(); err != nil {
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t.Fatal("docker unpause failed:", err)
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}
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// Wait until it's up and running.
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if err := testutil.WaitForHTTP(port, 30*time.Second); err != nil {
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t.Fatal("WaitForHTTP() timeout:", err)
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}
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// Check if container is working again.
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if err := httpRequestSucceeds(client, "localhost", port); err != nil {
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t.Error("http request failed:", err)
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}
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}
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func TestCheckpointRestore(t *testing.T) {
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if !testutil.IsPauseResumeSupported() {
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t.Log("Pause/resume is not supported, skipping test.")
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return
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}
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if err := testutil.Pull("google/python-hello"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("save-restore-test")
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if err := d.Run("-p", "8080", "google/python-hello"); err != nil {
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t.Fatalf("docker run failed: %v", err)
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}
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defer d.CleanUp()
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if err := d.Checkpoint("test"); err != nil {
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t.Fatal("docker checkpoint failed:", err)
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}
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if _, err := d.Wait(30 * time.Second); err != nil {
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t.Fatal(err)
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}
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if err := d.Restore("test"); err != nil {
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t.Fatal("docker restore failed:", err)
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}
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// Find where port 8080 is mapped to.
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port, err := d.FindPort(8080)
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if err != nil {
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t.Fatal("docker.FindPort(8080) failed:", err)
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}
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// Wait until it's up and running.
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if err := testutil.WaitForHTTP(port, 30*time.Second); err != nil {
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t.Fatal("WaitForHTTP() timeout:", err)
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}
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// Check if container is working again.
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client := http.Client{Timeout: time.Duration(2 * time.Second)}
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if err := httpRequestSucceeds(client, "localhost", port); err != nil {
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t.Error("http request failed:", err)
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}
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}
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// Create client and server that talk to each other using the local IP.
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func TestConnectToSelf(t *testing.T) {
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d := testutil.MakeDocker("connect-to-self-test")
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// Creates server that replies "server" and exists. Sleeps at the end because
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// 'docker exec' gets killed if the init process exists before it can finish.
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if err := d.Run("ubuntu:trusty", "/bin/sh", "-c", "echo server | nc -l -p 8080 && sleep 1"); err != nil {
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t.Fatal("docker run failed:", err)
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}
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defer d.CleanUp()
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// Finds IP address for host.
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ip, err := d.Exec("/bin/sh", "-c", "cat /etc/hosts | grep ${HOSTNAME} | awk '{print $1}'")
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if err != nil {
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t.Fatal("docker exec failed:", err)
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}
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ip = strings.TrimRight(ip, "\n")
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// Runs client that sends "client" to the server and exits.
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reply, err := d.Exec("/bin/sh", "-c", fmt.Sprintf("echo client | nc %s 8080", ip))
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if err != nil {
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t.Fatal("docker exec failed:", err)
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}
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// Ensure both client and server got the message from each other.
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if want := "server\n"; reply != want {
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t.Errorf("Error on server, want: %q, got: %q", want, reply)
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}
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if _, err := d.WaitForOutput("^client\n$", 1*time.Second); err != nil {
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t.Fatal("docker.WaitForOutput(client) timeout:", err)
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}
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}
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func TestMemLimit(t *testing.T) {
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if err := testutil.Pull("alpine"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("cgroup-test")
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cmd := "cat /proc/meminfo | grep MemTotal: | awk '{print $2}'"
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out, err := d.RunFg("--memory=500MB", "alpine", "sh", "-c", cmd)
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if err != nil {
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t.Fatal("docker run failed:", err)
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}
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defer d.CleanUp()
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// Remove warning message that swap isn't present.
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if strings.HasPrefix(out, "WARNING") {
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lines := strings.Split(out, "\n")
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if len(lines) != 3 {
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t.Fatalf("invalid output: %s", out)
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}
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out = lines[1]
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}
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got, err := strconv.ParseUint(strings.TrimSpace(out), 10, 64)
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if err != nil {
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t.Fatalf("failed to parse %q: %v", out, err)
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}
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if want := uint64(500 * 1024); got != want {
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t.Errorf("MemTotal got: %d, want: %d", got, want)
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}
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}
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func TestNumCPU(t *testing.T) {
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if err := testutil.Pull("alpine"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("cgroup-test")
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cmd := "cat /proc/cpuinfo | grep 'processor.*:' | wc -l"
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out, err := d.RunFg("--cpuset-cpus=0", "alpine", "sh", "-c", cmd)
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if err != nil {
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t.Fatal("docker run failed:", err)
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}
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defer d.CleanUp()
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got, err := strconv.Atoi(strings.TrimSpace(out))
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if err != nil {
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t.Fatalf("failed to parse %q: %v", out, err)
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}
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if want := 1; got != want {
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t.Errorf("MemTotal got: %d, want: %d", got, want)
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}
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}
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// TestJobControl tests that job control characters are handled properly.
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func TestJobControl(t *testing.T) {
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if err := testutil.Pull("alpine"); err != nil {
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t.Fatalf("docker pull failed: %v", err)
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}
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d := testutil.MakeDocker("job-control-test")
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// Start the container with an attached PTY.
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_, ptmx, err := d.RunWithPty("alpine", "sh")
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if err != nil {
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t.Fatalf("docker run failed: %v", err)
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}
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defer ptmx.Close()
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defer d.CleanUp()
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// Call "sleep 100" in the shell.
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if _, err := ptmx.Write([]byte("sleep 100\n")); err != nil {
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t.Fatalf("error writing to pty: %v", err)
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}
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// Give shell a few seconds to start executing the sleep.
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time.Sleep(2 * time.Second)
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// Send a ^C to the pty, which should kill sleep, but not the shell.
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// \x03 is ASCII "end of text", which is the same as ^C.
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if _, err := ptmx.Write([]byte{'\x03'}); err != nil {
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t.Fatalf("error writing to pty: %v", err)
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}
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// The shell should still be alive at this point. Sleep should have
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// exited with code 2+128=130. We'll exit with 10 plus that number, so
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// that we can be sure that the shell did not get signalled.
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if _, err := ptmx.Write([]byte("exit $(expr $? + 10)\n")); err != nil {
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t.Fatalf("error writing to pty: %v", err)
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}
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// Wait for the container to exit.
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got, err := d.Wait(5 * time.Second)
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if err != nil {
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t.Fatalf("error getting exit code: %v", err)
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}
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// Container should exit with code 10+130=140.
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if want := syscall.WaitStatus(140); got != want {
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t.Errorf("container exited with code %d want %d", got, want)
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}
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}
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// TestTmpFile checks that files inside '/tmp' are not overridden. In addition,
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// it checks that working dir is created if it doesn't exit.
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func TestTmpFile(t *testing.T) {
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if err := testutil.Pull("alpine"); err != nil {
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t.Fatal("docker pull failed:", err)
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}
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d := testutil.MakeDocker("tmp-file-test")
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if err := d.Run("-w=/tmp/foo/bar", "--read-only", "alpine", "touch", "/tmp/foo/bar/file"); err != nil {
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t.Fatal("docker run failed:", err)
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}
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defer d.CleanUp()
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}
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func TestMain(m *testing.M) {
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testutil.EnsureSupportedDockerVersion()
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os.Exit(m.Run())
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}
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