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status.go
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/
status.go
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// Copyright 2014 The rkt Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//+build linux
package main
import "github.com/coreos/rkt/Godeps/_workspace/src/github.com/spf13/cobra"
var (
cmdStatus = &cobra.Command{
Use: "status [--wait] UUID",
Short: "Check the status of a rkt pod",
Run: runWrapper(runStatus),
}
flagWait bool
)
const (
overlayStatusDirTemplate = "overlay/%s/upper/rkt/status"
regularStatusDir = "stage1/rootfs/rkt/status"
cmdStatusName = "status"
)
func init() {
cmdRkt.AddCommand(cmdStatus)
cmdStatus.Flags().BoolVar(&flagWait, "wait", false, "toggle waiting for the pod to exit")
}
func runStatus(cmd *cobra.Command, args []string) (exit int) {
if len(args) != 1 {
cmd.Usage()
return 1
}
podUUID, err := resolveUUID(args[0])
if err != nil {
stderr("Unable to resolve UUID: %v", err)
return 1
}
p, err := getPod(podUUID)
if err != nil {
stderr("Unable to get pod: %v", err)
return 1
}
defer p.Close()
if flagWait {
if err := p.waitExited(); err != nil {
stderr("Unable to wait for pod: %v", err)
return 1
}
}
if err = printStatus(p); err != nil {
stderr("Unable to print status: %v", err)
return 1
}
return 0
}
// printStatus prints the pod's pid and per-app status codes
func printStatus(p *pod) error {
stdout("state=%s", p.getState())
if p.isRunning() {
stdout("networks=%s", fmtNets(p.nets))
}
if !p.isEmbryo && !p.isPreparing && !p.isPrepared && !p.isAbortedPrepare && !p.isGarbage && !p.isGone {
pid, err := p.getPID()
if err != nil {
return err
}
stats, err := p.getExitStatuses()
if err != nil {
return err
}
stdout("pid=%d\nexited=%t", pid, p.isExited)
for app, stat := range stats {
stdout("app-%s=%d", app, stat)
}
}
return nil
}