bd742d5d99
Realized as I was starting to copy some stuff to other repos that we should go ahead and add this.
95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// Copyright © 2017 The virtual-kubelet authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package api
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import (
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"context"
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"io"
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"net/http"
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"strconv"
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"time"
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"github.com/gorilla/mux"
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"github.com/pkg/errors"
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"github.com/virtual-kubelet/virtual-kubelet/errdefs"
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"github.com/virtual-kubelet/virtual-kubelet/log"
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)
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// ContainerLogsHandlerFunc is used in place of backend implementations for getting container logs
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type ContainerLogsHandlerFunc func(ctx context.Context, namespace, podName, containerName string, opts ContainerLogOpts) (io.ReadCloser, error)
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// ContainerLogOpts are used to pass along options to be set on the container
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// log stream.
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type ContainerLogOpts struct {
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Tail int
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Since time.Duration
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LimitBytes int
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Timestamps bool
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}
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// HandleContainerLogs creates an http handler function from a provider to serve logs from a pod
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func HandleContainerLogs(h ContainerLogsHandlerFunc) http.HandlerFunc {
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if h == nil {
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return NotImplemented
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}
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return handleError(func(w http.ResponseWriter, req *http.Request) error {
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vars := mux.Vars(req)
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if len(vars) != 3 {
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return errdefs.NotFound("not found")
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}
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ctx := req.Context()
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namespace := vars["namespace"]
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pod := vars["pod"]
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container := vars["container"]
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tail := 10
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q := req.URL.Query()
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if queryTail := q.Get("tailLines"); queryTail != "" {
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t, err := strconv.Atoi(queryTail)
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if err != nil {
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return errdefs.AsInvalidInput(errors.Wrap(err, "could not parse \"tailLines\""))
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}
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tail = t
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}
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// TODO(@cpuguy83): support v1.PodLogOptions
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// The kubelet decoding here is not straight forward, so this needs to be disected
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opts := ContainerLogOpts{
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Tail: tail,
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}
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logs, err := h(ctx, namespace, pod, container, opts)
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if err != nil {
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return errors.Wrap(err, "error getting container logs?)")
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}
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defer logs.Close()
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req.Header.Set("Transfer-Encoding", "chunked")
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if _, ok := w.(writeFlusher); !ok {
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log.G(ctx).Debug("http response writer does not support flushes")
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}
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if _, err := io.Copy(flushOnWrite(w), logs); err != nil {
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return errors.Wrap(err, "error writing response to client")
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}
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return nil
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})
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}
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