mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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124 lines
3.3 KiB
Go
124 lines
3.3 KiB
Go
/*
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Copyright 2015 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 rkt
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import (
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"fmt"
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"io"
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"strings"
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"time"
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"github.com/golang/glog"
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"golang.org/x/net/context"
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rktapi "github.com/coreos/rkt/api/v1alpha"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/api/v1"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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"k8s.io/kubernetes/pkg/kubelet/util/format"
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)
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const (
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journalTimestampLayout = "2006-01-02 15:04:05 -0700 MST"
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)
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// processLines write the lines into stdout in the required format.
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func processLines(lines []string, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) {
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msgKey := "MESSAGE="
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for _, line := range lines {
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msgStart := strings.Index(line, msgKey)
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if msgStart < 0 {
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glog.Warningf("rkt: Invalid log line %q, missing %q", line, msgKey)
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continue
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}
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tss := strings.TrimSpace(line[:msgStart])
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msg := strings.TrimPrefix(line[msgStart:], msgKey)
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t, err := time.Parse(journalTimestampLayout, tss)
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if err != nil {
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glog.Warningf("rkt: Failed to parse the timestamp %q: %v", tss, err)
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continue
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}
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var result string
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if logOptions.Timestamps {
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result = fmt.Sprintf("%s %s\n", t.Format(time.RFC3339), msg)
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} else {
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result = fmt.Sprintf("%s\n", msg)
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}
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if _, err := io.WriteString(stdout, result); err != nil {
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glog.Warningf("rkt: Cannot write log line %q to output: %v", result, err)
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}
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}
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}
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// GetContainerLogs uses rkt's GetLogs API to get the logs of the container.
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// By default, it returns a snapshot of the container log. Set |follow| to true to
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// stream the log. Set |follow| to false and specify the number of lines (e.g.
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// "100" or "all") to tail the log.
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//
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// TODO(yifan): This doesn't work with lkvm stage1 yet.
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func (r *Runtime) GetContainerLogs(pod *v1.Pod, containerID kubecontainer.ContainerID, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) error {
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id, err := parseContainerID(containerID)
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if err != nil {
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return err
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}
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var since int64
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if logOptions.SinceSeconds != nil {
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t := metav1.Now().Add(-time.Duration(*logOptions.SinceSeconds) * time.Second)
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since = t.Unix()
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}
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if logOptions.SinceTime != nil {
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since = logOptions.SinceTime.Unix()
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}
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getLogsRequest := &rktapi.GetLogsRequest{
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PodId: id.uuid,
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AppName: id.appName,
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Follow: logOptions.Follow,
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SinceTime: since,
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}
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if logOptions.TailLines != nil {
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getLogsRequest.Lines = int32(*logOptions.TailLines)
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}
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stream, err := r.apisvc.GetLogs(context.Background(), getLogsRequest)
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if err != nil {
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glog.Errorf("rkt: Failed to create log stream for pod %q: %v", format.Pod(pod), err)
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return err
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}
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for {
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log, err := stream.Recv()
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if err == io.EOF {
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break
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}
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if err != nil {
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glog.Errorf("rkt: Failed to receive log for pod %q: %v", format.Pod(pod), err)
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return err
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}
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processLines(log.Lines, logOptions, stdout, stderr)
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}
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return nil
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}
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