3b21a9901b
Add support for terminal resizing for exec, attach, and run. Note that for Docker, exec sessions inherit the environment from the primary process, so if the container was created with tty=false, that means the exec session's TERM variable will default to "dumb". Users can override this by setting TERM=xterm (or whatever is appropriate) to get the correct "smart" terminal behavior.
59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
/*
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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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"errors"
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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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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/types"
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"k8s.io/kubernetes/pkg/util/runtime"
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"k8s.io/kubernetes/pkg/util/term"
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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) 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, idleTimeout, streamCreationTimeout time.Duration, supportedProtocols []string) {
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ctx, ok := createStreams(req, w, 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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cmd := req.URL.Query()[api.ExecCommandParamm]
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err := executor.ExecInContainer(podName, uid, container, cmd, ctx.stdinStream, ctx.stdoutStream, ctx.stderrStream, ctx.tty, ctx.resizeChan)
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if err != nil {
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msg := fmt.Sprintf("error executing command in container: %v", err)
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runtime.HandleError(errors.New(msg))
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fmt.Fprint(ctx.errorStream, msg)
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}
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}
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