84 lines
2.9 KiB
Go
84 lines
2.9 KiB
Go
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/*
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Copyright 2016 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package remotecommand
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import (
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"fmt"
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"io"
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"net/http"
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"time"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/runtime"
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utilexec "k8s.io/kubernetes/pkg/util/exec"
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"k8s.io/kubernetes/pkg/util/term"
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)
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const (
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NonZeroExitCodeReason = metav1.StatusReason("NonZeroExitCode")
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ExitCodeCauseType = metav1.CauseType("ExitCode")
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)
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// Executor knows how to execute a command in a container in a pod.
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type Executor interface {
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// ExecInContainer executes a command in a container in the pod, copying data
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// between in/out/err and the container's stdin/stdout/stderr.
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ExecInContainer(name string, uid types.UID, container string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan term.Size, timeout time.Duration) error
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}
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// ServeExec handles requests to execute a command in a container. After
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// creating/receiving the required streams, it delegates the actual execution
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// to the executor.
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func ServeExec(w http.ResponseWriter, req *http.Request, executor Executor, podName string, uid types.UID, container string, cmd []string, streamOpts *Options, idleTimeout, streamCreationTimeout time.Duration, supportedProtocols []string) {
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ctx, ok := createStreams(req, w, streamOpts, supportedProtocols, idleTimeout, streamCreationTimeout)
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if !ok {
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// error is handled by createStreams
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return
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}
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defer ctx.conn.Close()
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err := executor.ExecInContainer(podName, uid, container, cmd, ctx.stdinStream, ctx.stdoutStream, ctx.stderrStream, ctx.tty, ctx.resizeChan, 0)
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if err != nil {
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if exitErr, ok := err.(utilexec.ExitError); ok && exitErr.Exited() {
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rc := exitErr.ExitStatus()
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ctx.writeStatus(&apierrors.StatusError{ErrStatus: metav1.Status{
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Status: metav1.StatusFailure,
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Reason: NonZeroExitCodeReason,
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Details: &metav1.StatusDetails{
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Causes: []metav1.StatusCause{
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{
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Type: ExitCodeCauseType,
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Message: fmt.Sprintf("%d", rc),
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},
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},
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},
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Message: fmt.Sprintf("command terminated with non-zero exit code: %v", exitErr),
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}})
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} else {
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err = fmt.Errorf("error executing command in container: %v", err)
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runtime.HandleError(err)
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ctx.writeStatus(apierrors.NewInternalError(err))
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}
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} else {
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ctx.writeStatus(&apierrors.StatusError{ErrStatus: metav1.Status{
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Status: metav1.StatusSuccess,
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}})
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}
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}
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