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Diffstat (limited to 'runsc/criutil/criutil.go')
-rw-r--r-- | runsc/criutil/criutil.go | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/runsc/criutil/criutil.go b/runsc/criutil/criutil.go deleted file mode 100644 index 773f5a1c4..000000000 --- a/runsc/criutil/criutil.go +++ /dev/null @@ -1,277 +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 criutil contains utility functions for interacting with the -// Container Runtime Interface (CRI), principally via the crictl command line -// tool. This requires critools to be installed on the local system. -package criutil - -import ( - "encoding/json" - "fmt" - "os" - "os/exec" - "strings" - "time" - - "gvisor.dev/gvisor/runsc/testutil" -) - -const endpointPrefix = "unix://" - -// Crictl contains information required to run the crictl utility. -type Crictl struct { - executable string - timeout time.Duration - imageEndpoint string - runtimeEndpoint string -} - -// NewCrictl returns a Crictl configured with a timeout and an endpoint over -// which it will talk to containerd. -func NewCrictl(timeout time.Duration, endpoint string) *Crictl { - // Bazel doesn't pass PATH through, assume the location of crictl - // unless specified by environment variable. - executable := os.Getenv("CRICTL_PATH") - if executable == "" { - executable = "/usr/local/bin/crictl" - } - return &Crictl{ - executable: executable, - timeout: timeout, - imageEndpoint: endpointPrefix + endpoint, - runtimeEndpoint: endpointPrefix + endpoint, - } -} - -// Pull pulls an container image. It corresponds to `crictl pull`. -func (cc *Crictl) Pull(imageName string) error { - _, err := cc.run("pull", imageName) - return err -} - -// RunPod creates a sandbox. It corresponds to `crictl runp`. -func (cc *Crictl) RunPod(sbSpecFile string) (string, error) { - podID, err := cc.run("runp", sbSpecFile) - if err != nil { - return "", fmt.Errorf("runp failed: %v", err) - } - // Strip the trailing newline from crictl output. - return strings.TrimSpace(podID), nil -} - -// Create creates a container within a sandbox. It corresponds to `crictl -// create`. -func (cc *Crictl) Create(podID, contSpecFile, sbSpecFile string) (string, error) { - podID, err := cc.run("create", podID, contSpecFile, sbSpecFile) - if err != nil { - return "", fmt.Errorf("create failed: %v", err) - } - // Strip the trailing newline from crictl output. - return strings.TrimSpace(podID), nil -} - -// Start starts a container. It corresponds to `crictl start`. -func (cc *Crictl) Start(contID string) (string, error) { - output, err := cc.run("start", contID) - if err != nil { - return "", fmt.Errorf("start failed: %v", err) - } - return output, nil -} - -// Stop stops a container. It corresponds to `crictl stop`. -func (cc *Crictl) Stop(contID string) error { - _, err := cc.run("stop", contID) - return err -} - -// Exec execs a program inside a container. It corresponds to `crictl exec`. -func (cc *Crictl) Exec(contID string, args ...string) (string, error) { - a := []string{"exec", contID} - a = append(a, args...) - output, err := cc.run(a...) - if err != nil { - return "", fmt.Errorf("exec failed: %v", err) - } - return output, nil -} - -// Rm removes a container. It corresponds to `crictl rm`. -func (cc *Crictl) Rm(contID string) error { - _, err := cc.run("rm", contID) - return err -} - -// StopPod stops a pod. It corresponds to `crictl stopp`. -func (cc *Crictl) StopPod(podID string) error { - _, err := cc.run("stopp", podID) - return err -} - -// containsConfig is a minimal copy of -// https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/apis/cri/runtime/v1alpha2/api.proto -// It only contains fields needed for testing. -type containerConfig struct { - Status containerStatus -} - -type containerStatus struct { - Network containerNetwork -} - -type containerNetwork struct { - IP string -} - -// PodIP returns a pod's IP address. -func (cc *Crictl) PodIP(podID string) (string, error) { - output, err := cc.run("inspectp", podID) - if err != nil { - return "", err - } - conf := &containerConfig{} - if err := json.Unmarshal([]byte(output), conf); err != nil { - return "", fmt.Errorf("failed to unmarshal JSON: %v, %s", err, output) - } - if conf.Status.Network.IP == "" { - return "", fmt.Errorf("no IP found in config: %s", output) - } - return conf.Status.Network.IP, nil -} - -// RmPod removes a container. It corresponds to `crictl rmp`. -func (cc *Crictl) RmPod(podID string) error { - _, err := cc.run("rmp", podID) - return err -} - -// StartContainer pulls the given image ands starts the container in the -// sandbox with the given podID. -func (cc *Crictl) StartContainer(podID, image, sbSpec, contSpec string) (string, error) { - // Write the specs to files that can be read by crictl. - sbSpecFile, err := testutil.WriteTmpFile("sbSpec", sbSpec) - if err != nil { - return "", fmt.Errorf("failed to write sandbox spec: %v", err) - } - contSpecFile, err := testutil.WriteTmpFile("contSpec", contSpec) - if err != nil { - return "", fmt.Errorf("failed to write container spec: %v", err) - } - - return cc.startContainer(podID, image, sbSpecFile, contSpecFile) -} - -func (cc *Crictl) startContainer(podID, image, sbSpecFile, contSpecFile string) (string, error) { - if err := cc.Pull(image); err != nil { - return "", fmt.Errorf("failed to pull %s: %v", image, err) - } - - contID, err := cc.Create(podID, contSpecFile, sbSpecFile) - if err != nil { - return "", fmt.Errorf("failed to create container in pod %q: %v", podID, err) - } - - if _, err := cc.Start(contID); err != nil { - return "", fmt.Errorf("failed to start container %q in pod %q: %v", contID, podID, err) - } - - return contID, nil -} - -// StopContainer stops and deletes the container with the given container ID. -func (cc *Crictl) StopContainer(contID string) error { - if err := cc.Stop(contID); err != nil { - return fmt.Errorf("failed to stop container %q: %v", contID, err) - } - - if err := cc.Rm(contID); err != nil { - return fmt.Errorf("failed to remove container %q: %v", contID, err) - } - - return nil -} - -// StartPodAndContainer pulls an image, then starts a sandbox and container in -// that sandbox. It returns the pod ID and container ID. -func (cc *Crictl) StartPodAndContainer(image, sbSpec, contSpec string) (string, string, error) { - // Write the specs to files that can be read by crictl. - sbSpecFile, err := testutil.WriteTmpFile("sbSpec", sbSpec) - if err != nil { - return "", "", fmt.Errorf("failed to write sandbox spec: %v", err) - } - contSpecFile, err := testutil.WriteTmpFile("contSpec", contSpec) - if err != nil { - return "", "", fmt.Errorf("failed to write container spec: %v", err) - } - - podID, err := cc.RunPod(sbSpecFile) - if err != nil { - return "", "", err - } - - contID, err := cc.startContainer(podID, image, sbSpecFile, contSpecFile) - - return podID, contID, err -} - -// StopPodAndContainer stops a container and pod. -func (cc *Crictl) StopPodAndContainer(podID, contID string) error { - if err := cc.StopContainer(contID); err != nil { - return fmt.Errorf("failed to stop container %q in pod %q: %v", contID, podID, err) - } - - if err := cc.StopPod(podID); err != nil { - return fmt.Errorf("failed to stop pod %q: %v", podID, err) - } - - if err := cc.RmPod(podID); err != nil { - return fmt.Errorf("failed to remove pod %q: %v", podID, err) - } - - return nil -} - -// run runs crictl with the given args and returns an error if it takes longer -// than cc.Timeout to run. -func (cc *Crictl) run(args ...string) (string, error) { - defaultArgs := []string{ - "--image-endpoint", cc.imageEndpoint, - "--runtime-endpoint", cc.runtimeEndpoint, - } - cmd := exec.Command(cc.executable, append(defaultArgs, args...)...) - - // Run the command with a timeout. - done := make(chan string) - errCh := make(chan error) - go func() { - output, err := cmd.CombinedOutput() - if err != nil { - errCh <- fmt.Errorf("error: \"%v\", output: %s", err, string(output)) - return - } - done <- string(output) - }() - select { - case output := <-done: - return output, nil - case err := <-errCh: - return "", err - case <-time.After(cc.timeout): - if err := testutil.KillCommand(cmd); err != nil { - return "", fmt.Errorf("timed out, then couldn't kill process %+v: %v", cmd, err) - } - return "", fmt.Errorf("timed out: %+v", cmd) - } -} |