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51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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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"io"
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"os/exec"
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"strconv"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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)
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// GetContainerLogs uses journalctl 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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// TODO(yifan): Currently, it fetches all the containers' log within a pod. We will
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// be able to fetch individual container's log once https://github.com/coreos/rkt/pull/841
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// landed.
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func (r *Runtime) GetContainerLogs(pod *api.Pod, containerID string, tail string, follow bool, stdout, stderr io.Writer) error {
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unitName := makePodServiceFileName(pod.UID)
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cmd := exec.Command("journalctl", "-u", unitName)
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if follow {
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cmd.Args = append(cmd.Args, "-f")
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}
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if tail == "all" {
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cmd.Args = append(cmd.Args, "-a")
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} else {
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_, err := strconv.Atoi(tail)
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if err == nil {
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cmd.Args = append(cmd.Args, "-n", tail)
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}
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}
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cmd.Stdout, cmd.Stderr = stdout, stderr
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return cmd.Start()
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}
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