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rm.go
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rm.go
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// Copyright 2015 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 (
"os"
"github.com/appc/spec/schema/types"
"github.com/spf13/cobra"
)
var (
cmdRm = &cobra.Command{
Use: "rm [--uuid-file=FILE] UUID ...",
Short: "Remove all files and resources associated with an exited pod",
Run: runWrapper(runRm),
}
flagUUIDFile string
)
func init() {
cmdRkt.AddCommand(cmdRm)
cmdRm.Flags().StringVar(&flagUUIDFile, "uuid-file", "", "read pod UUID from file instead of argument")
}
func runRm(cmd *cobra.Command, args []string) (exit int) {
var podUUID *types.UUID
var podUUIDs []*types.UUID
var err error
switch {
case len(args) == 0 && flagUUIDFile != "":
podUUID, err = readUUIDFromFile(flagUUIDFile)
if err != nil {
stderr("Unable to read UUID from file: %v", err)
return 1
}
podUUIDs = append(podUUIDs, podUUID)
case len(args) > 0 && flagUUIDFile == "":
for _, uuid := range args {
podUUID, err := resolveUUID(uuid)
if err != nil {
stderr("Unable to resolve UUID: %v", err)
} else {
podUUIDs = append(podUUIDs, podUUID)
}
}
default:
cmd.Usage()
return 1
}
ret := 0
for _, podUUID = range podUUIDs {
p, err := getPod(podUUID)
if err != nil {
ret = 1
stderr("Cannot get pod: %v", err)
}
if removePod(p) {
stdout("%q", p.uuid)
} else {
ret = 1
}
}
if ret == 1 {
stderr("Failed to remove one or more pods")
}
return ret
}
func removePod(p *pod) bool {
switch {
case p.isRunning():
stderr("Pod %q is currently running", p.uuid)
return false
case p.isEmbryo, p.isPreparing:
stderr("Pod %q is currently being prepared", p.uuid)
return false
case p.isExitedDeleting, p.isDeleting:
stderr("Pod %q is currently being deleted", p.uuid)
return false
case p.isAbortedPrepare:
stderr("Moving failed prepare %q to garbage", p.uuid)
if err := p.xToGarbage(); err != nil && err != os.ErrNotExist {
stderr("Rename error: %v", err)
return false
}
case p.isPrepared:
stderr("Moving expired prepared pod %q to garbage", p.uuid)
if err := p.xToGarbage(); err != nil && err != os.ErrNotExist {
stderr("Rename error: %v", err)
return false
}
// p.isExitedGarbage and p.isExited can be true at the same time. Test
// the most specific case first.
case p.isExitedGarbage, p.isGarbage:
case p.isExited:
if err := p.xToExitedGarbage(); err != nil && err != os.ErrNotExist {
stderr("Rename error: %v", err)
return false
}
}
if err := p.ExclusiveLock(); err != nil {
stderr("Unable to acquire exclusive lock: %v", err)
return false
}
deletePod(p)
return true
}