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longer TerminationGracePeriodSeconds
Signed-off-by: shaoyue.chen <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package rest | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
|
|
||
| "github.com/pkg/errors" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/apimachinery/pkg/runtime/serializer" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/remotecommand" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| ) | ||
|
|
||
| //go:generate mockgen -source=./rest_client.go -destination=./rest_client_mock.go -package=rest RestClient | ||
|
|
||
| type RestClient interface { | ||
| // Exec exec command in pod | ||
| Exec(ctx context.Context, namespace, pod, container string, cmd []string) (stdout string, stderr string, err error) | ||
| } | ||
|
|
||
| type RestClientImpl struct { | ||
| restClient rest.Interface | ||
| config *rest.Config | ||
| scheme *runtime.Scheme | ||
| } | ||
|
|
||
| var singletonRestClient RestClient | ||
|
|
||
| func GetRestClient() RestClient { | ||
| return singletonRestClient | ||
| } | ||
|
|
||
| // SetRestClient for unit test | ||
| func SetRestClient(r RestClient) { | ||
| singletonRestClient = r | ||
| } | ||
|
|
||
| func init() { | ||
| config := ctrl.GetConfigOrDie() | ||
| restClient, err := newRestClientImpl(config) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| singletonRestClient = restClient | ||
| } | ||
|
|
||
| func newRestClientImpl(config *rest.Config) (*RestClientImpl, error) { | ||
| scheme := runtime.NewScheme() | ||
| if err := corev1.AddToScheme(scheme); err != nil { | ||
| return nil, errors.Wrap(err, "failed to add corev1 to scheme") | ||
| } | ||
| config.NegotiatedSerializer = serializer.NewCodecFactory(scheme) | ||
| config.GroupVersion = &corev1.SchemeGroupVersion | ||
| restClient, err := rest.RESTClientFor(config) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "failed to create rest client") | ||
| } | ||
|
|
||
| return &RestClientImpl{ | ||
| restClient: restClient, | ||
| config: config, | ||
| scheme: scheme, | ||
| }, nil | ||
| } | ||
|
|
||
| func (clis RestClientImpl) Exec(ctx context.Context, namespace, pod, container string, cmd []string) (stdout string, stderr string, err error) { | ||
| req := clis.restClient.Post(). | ||
| Resource("pods"). | ||
| Namespace(namespace). | ||
| Name(pod). | ||
| SubResource("exec"). | ||
| VersionedParams(&corev1.PodExecOptions{ | ||
| Container: container, | ||
| Command: cmd, | ||
| Stdin: false, | ||
| Stdout: true, | ||
| Stderr: true, | ||
| }, runtime.NewParameterCodec(clis.scheme)) | ||
|
|
||
| exec, err := remotecommand.NewSPDYExecutor(clis.config, "POST", req.URL()) | ||
| if err != nil { | ||
| return "", "", errors.Wrap(err, "failed to create executor") | ||
| } | ||
|
|
||
| var stdoutBuf, stderrBuf bytes.Buffer | ||
| err = exec.Stream(remotecommand.StreamOptions{ | ||
| Stdout: &stdoutBuf, | ||
| Stderr: &stderrBuf, | ||
| }) | ||
| if err != nil { | ||
| return "", "", errors.Wrap(err, "failed to exec command") | ||
| } | ||
|
|
||
| return stdoutBuf.String(), stderrBuf.String(), nil | ||
| } |