diff options
Diffstat (limited to 'test/root/crictl_test.go')
| -rw-r--r-- | test/root/crictl_test.go | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/test/root/crictl_test.go b/test/root/crictl_test.go deleted file mode 100644 index 732fae821..000000000 --- a/test/root/crictl_test.go +++ /dev/null @@ -1,393 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package root - -import ( - "bytes" - "encoding/json" - "fmt" - "io" - "io/ioutil" - "log" - "net/http" - "os" - "os/exec" - "path" - "path/filepath" - "strings" - "testing" - "time" - - "gvisor.dev/gvisor/pkg/cleanup" - "gvisor.dev/gvisor/pkg/test/criutil" - "gvisor.dev/gvisor/pkg/test/dockerutil" - "gvisor.dev/gvisor/pkg/test/testutil" -) - -// Tests for crictl have to be run as root (rather than in a user namespace) -// because crictl creates named network namespaces in /var/run/netns/. - -// Sandbox returns a JSON config for a simple sandbox. Sandbox names must be -// unique so different names should be used when running tests on the same -// containerd instance. -func Sandbox(name string) string { - // Sandbox is a default JSON config for a sandbox. - s := map[string]interface{}{ - "metadata": map[string]string{ - "name": name, - "namespace": "default", - "uid": testutil.RandomID(""), - }, - "linux": map[string]string{}, - "log_directory": "/tmp", - } - - v, err := json.Marshal(s) - if err != nil { - // This shouldn't happen. - panic(err) - } - return string(v) -} - -// SimpleSpec returns a JSON config for a simple container that runs the -// specified command in the specified image. -func SimpleSpec(name, image string, cmd []string, extra map[string]interface{}) string { - s := map[string]interface{}{ - "metadata": map[string]string{ - "name": name, - }, - "image": map[string]string{ - "image": testutil.ImageByName(image), - }, - // Log files are not deleted after root tests are run. Log to random - // paths to ensure logs are fresh. - "log_path": fmt.Sprintf("%s.log", testutil.RandomID(name)), - } - if len(cmd) > 0 { // Omit if empty. - s["command"] = cmd - } - for k, v := range extra { - s[k] = v // Extra settings. - } - v, err := json.Marshal(s) - if err != nil { - // This shouldn't happen. - panic(err) - } - return string(v) -} - -// Httpd is a JSON config for an httpd container. -var Httpd = SimpleSpec("httpd", "basic/httpd", nil, nil) - -// TestCrictlSanity refers to b/112433158. -func TestCrictlSanity(t *testing.T) { - // Setup containerd and crictl. - crictl, cleanup, err := setup(t) - if err != nil { - t.Fatalf("failed to setup crictl: %v", err) - } - defer cleanup() - podID, contID, err := crictl.StartPodAndContainer("basic/httpd", Sandbox("default"), Httpd) - if err != nil { - t.Fatalf("start failed: %v", err) - } - - // Look for the httpd page. - if err = httpGet(crictl, podID, "index.html"); err != nil { - t.Fatalf("failed to get page: %v", err) - } - - // Stop everything. - if err := crictl.StopPodAndContainer(podID, contID); err != nil { - t.Fatalf("stop failed: %v", err) - } -} - -// HttpdMountPaths is a JSON config for an httpd container with additional -// mounts. -var HttpdMountPaths = SimpleSpec("httpd", "basic/httpd", nil, map[string]interface{}{ - "mounts": []map[string]interface{}{ - map[string]interface{}{ - "container_path": "/var/run/secrets/kubernetes.io/serviceaccount", - "host_path": "/var/lib/kubelet/pods/82bae206-cdf5-11e8-b245-8cdcd43ac064/volumes/kubernetes.io~secret/default-token-2rpfx", - "readonly": true, - }, - map[string]interface{}{ - "container_path": "/etc/hosts", - "host_path": "/var/lib/kubelet/pods/82bae206-cdf5-11e8-b245-8cdcd43ac064/etc-hosts", - "readonly": false, - }, - map[string]interface{}{ - "container_path": "/dev/termination-log", - "host_path": "/var/lib/kubelet/pods/82bae206-cdf5-11e8-b245-8cdcd43ac064/containers/httpd/d1709580", - "readonly": false, - }, - map[string]interface{}{ - "container_path": "/usr/local/apache2/htdocs/test", - "host_path": "/var/lib/kubelet/pods/82bae206-cdf5-11e8-b245-8cdcd43ac064", - "readonly": true, - }, - }, - "linux": map[string]interface{}{}, -}) - -// TestMountPaths refers to b/117635704. -func TestMountPaths(t *testing.T) { - // Setup containerd and crictl. - crictl, cleanup, err := setup(t) - if err != nil { - t.Fatalf("failed to setup crictl: %v", err) - } - defer cleanup() - podID, contID, err := crictl.StartPodAndContainer("basic/httpd", Sandbox("default"), HttpdMountPaths) - if err != nil { - t.Fatalf("start failed: %v", err) - } - - // Look for the directory available at /test. - if err = httpGet(crictl, podID, "test"); err != nil { - t.Fatalf("failed to get page: %v", err) - } - - // Stop everything. - if err := crictl.StopPodAndContainer(podID, contID); err != nil { - t.Fatalf("stop failed: %v", err) - } -} - -// TestMountPaths refers to b/118728671. -func TestMountOverSymlinks(t *testing.T) { - // Setup containerd and crictl. - crictl, cleanup, err := setup(t) - if err != nil { - t.Fatalf("failed to setup crictl: %v", err) - } - defer cleanup() - - spec := SimpleSpec("busybox", "basic/resolv", []string{"sleep", "1000"}, nil) - podID, contID, err := crictl.StartPodAndContainer("basic/resolv", Sandbox("default"), spec) - if err != nil { - t.Fatalf("start failed: %v", err) - } - - out, err := crictl.Exec(contID, "readlink", "/etc/resolv.conf") - if err != nil { - t.Fatalf("readlink failed: %v, out: %s", err, out) - } - if want := "/tmp/resolv.conf"; !strings.Contains(string(out), want) { - t.Fatalf("/etc/resolv.conf is not pointing to %q: %q", want, string(out)) - } - - etc, err := crictl.Exec(contID, "cat", "/etc/resolv.conf") - if err != nil { - t.Fatalf("cat failed: %v, out: %s", err, etc) - } - tmp, err := crictl.Exec(contID, "cat", "/tmp/resolv.conf") - if err != nil { - t.Fatalf("cat failed: %v, out: %s", err, out) - } - if tmp != etc { - t.Fatalf("file content doesn't match:\n\t/etc/resolv.conf: %s\n\t/tmp/resolv.conf: %s", string(etc), string(tmp)) - } - - // Stop everything. - if err := crictl.StopPodAndContainer(podID, contID); err != nil { - t.Fatalf("stop failed: %v", err) - } -} - -// TestHomeDir tests that the HOME environment variable is set for -// Pod containers. -func TestHomeDir(t *testing.T) { - // Setup containerd and crictl. - crictl, cleanup, err := setup(t) - if err != nil { - t.Fatalf("failed to setup crictl: %v", err) - } - defer cleanup() - - // Note that container ID returned here is a sub-container. All Pod - // containers are sub-containers. The root container of the sandbox is the - // pause container. - t.Run("sub-container", func(t *testing.T) { - contSpec := SimpleSpec("subcontainer", "basic/busybox", []string{"sh", "-c", "echo $HOME"}, nil) - podID, contID, err := crictl.StartPodAndContainer("basic/busybox", Sandbox("subcont-sandbox"), contSpec) - if err != nil { - t.Fatalf("start failed: %v", err) - } - - out, err := crictl.Logs(contID) - if err != nil { - t.Fatalf("failed retrieving container logs: %v, out: %s", err, out) - } - if got, want := strings.TrimSpace(string(out)), "/root"; got != want { - t.Fatalf("Home directory invalid. Got %q, Want : %q", got, want) - } - - // Stop everything. - if err := crictl.StopPodAndContainer(podID, contID); err != nil { - t.Fatalf("stop failed: %v", err) - } - }) - - // Tests that HOME is set for the exec process. - t.Run("exec", func(t *testing.T) { - contSpec := SimpleSpec("exec", "basic/busybox", []string{"sleep", "1000"}, nil) - podID, contID, err := crictl.StartPodAndContainer("basic/busybox", Sandbox("exec-sandbox"), contSpec) - if err != nil { - t.Fatalf("start failed: %v", err) - } - - out, err := crictl.Exec(contID, "sh", "-c", "echo $HOME") - if err != nil { - t.Fatalf("failed retrieving container logs: %v, out: %s", err, out) - } - if got, want := strings.TrimSpace(string(out)), "/root"; got != want { - t.Fatalf("Home directory invalid. Got %q, Want : %q", got, want) - } - - // Stop everything. - if err := crictl.StopPodAndContainer(podID, contID); err != nil { - t.Fatalf("stop failed: %v", err) - } - }) -} - -// containerdConfigTemplate is a .toml config for containerd. It contains a -// formatting verb so the runtime field can be set via fmt.Sprintf. -const containerdConfigTemplate = ` -disabled_plugins = ["restart"] -[plugins.linux] - runtime = "%s" - runtime_root = "/tmp/test-containerd/runsc" - shim = "/usr/local/bin/gvisor-containerd-shim" - shim_debug = true - -[plugins.cri.containerd.runtimes.runsc] - runtime_type = "io.containerd.runtime.v1.linux" - runtime_engine = "%s" -` - -// setup sets up before a test. Specifically it: -// * Creates directories and a socket for containerd to utilize. -// * Runs containerd and waits for it to reach a "ready" state for testing. -// * Returns a cleanup function that should be called at the end of the test. -func setup(t *testing.T) (*criutil.Crictl, func(), error) { - // Create temporary containerd root and state directories, and a socket - // via which crictl and containerd communicate. - containerdRoot, err := ioutil.TempDir(testutil.TmpDir(), "containerd-root") - if err != nil { - t.Fatalf("failed to create containerd root: %v", err) - } - cu := cleanup.Make(func() { os.RemoveAll(containerdRoot) }) - defer cu.Clean() - - containerdState, err := ioutil.TempDir(testutil.TmpDir(), "containerd-state") - if err != nil { - t.Fatalf("failed to create containerd state: %v", err) - } - cu.Add(func() { os.RemoveAll(containerdState) }) - sockAddr := filepath.Join(testutil.TmpDir(), "containerd-test.sock") - - // We rewrite a configuration. This is based on the current docker - // configuration for the runtime under test. - runtime, err := dockerutil.RuntimePath() - if err != nil { - t.Fatalf("error discovering runtime path: %v", err) - } - config, configCleanup, err := testutil.WriteTmpFile("containerd-config", fmt.Sprintf(containerdConfigTemplate, runtime, runtime)) - if err != nil { - t.Fatalf("failed to write containerd config") - } - cu.Add(configCleanup) - - // Start containerd. - cmd := exec.Command(getContainerd(), - "--config", config, - "--log-level", "debug", - "--root", containerdRoot, - "--state", containerdState, - "--address", sockAddr) - startupR, startupW := io.Pipe() - defer startupR.Close() - defer startupW.Close() - stderr := &bytes.Buffer{} - stdout := &bytes.Buffer{} - cmd.Stderr = io.MultiWriter(startupW, stderr) - cmd.Stdout = io.MultiWriter(startupW, stdout) - cu.Add(func() { - // Log output in case of failure. - t.Logf("containerd stdout: %s", stdout.String()) - t.Logf("containerd stderr: %s", stderr.String()) - }) - - // Start the process. - if err := cmd.Start(); err != nil { - t.Fatalf("failed running containerd: %v", err) - } - - // Wait for containerd to boot. - if err := testutil.WaitUntilRead(startupR, "Start streaming server", nil, 10*time.Second); err != nil { - t.Fatalf("failed to start containerd: %v", err) - } - - // Kill must be the last cleanup (as it will be executed first). - cc := criutil.NewCrictl(t, sockAddr) - cu.Add(func() { - cc.CleanUp() // Remove tmp files, etc. - if err := testutil.KillCommand(cmd); err != nil { - log.Printf("error killing containerd: %v", err) - } - }) - - return cc, cu.Release(), nil -} - -// httpGet GETs the contents of a file served from a pod on port 80. -func httpGet(crictl *criutil.Crictl, podID, filePath string) error { - // Get the IP of the httpd server. - ip, err := crictl.PodIP(podID) - if err != nil { - return fmt.Errorf("failed to get IP from pod %q: %v", podID, err) - } - - // GET the page. We may be waiting for the server to start, so retry - // with a timeout. - var resp *http.Response - cb := func() error { - r, err := http.Get(fmt.Sprintf("http://%s", path.Join(ip, filePath))) - resp = r - return err - } - if err := testutil.Poll(cb, 20*time.Second); err != nil { - return err - } - defer resp.Body.Close() - - if resp.StatusCode != 200 { - return fmt.Errorf("bad status returned: %d", resp.StatusCode) - } - return nil -} - -func getContainerd() string { - // Use the local path if it exists, otherwise, use the system one. - if _, err := os.Stat("/usr/local/bin/containerd"); err == nil { - return "/usr/local/bin/containerd" - } - return "/usr/bin/containerd" -} |