This repository has been archived by the owner on Feb 24, 2020. It is now read-only.
/
gc.go
77 lines (67 loc) · 2.13 KB
/
gc.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
// 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 stage0
import (
"errors"
"fmt"
"os"
"os/exec"
"path/filepath"
"github.com/appc/spec/schema/types"
"github.com/hashicorp/errwrap"
"github.com/rkt/rkt/common"
)
// GC enters the pod by fork/exec()ing the stage1's /gc similar to /init.
// /gc can expect to have its CWD set to the pod root.
func GC(pdir string, uuid *types.UUID, localConfig string) error {
err := unregisterPod(pdir, uuid)
if err != nil {
// Probably not worth abandoning the rest
log.PrintE("warning: could not unregister pod with metadata service", err)
}
stage1Path := common.Stage1RootfsPath(pdir)
s1v, err := getStage1InterfaceVersion(pdir)
if err != nil {
return errwrap.Wrap(errors.New("Could not determine stage1 version"), err)
}
ep, err := getStage1Entrypoint(pdir, gcEntrypoint)
if err != nil {
return errwrap.Wrap(errors.New("error determining 'gc' entrypoint"), err)
}
args := []string{filepath.Join(stage1Path, ep)}
if debugEnabled {
args = append(args, "--debug")
}
if interfaceVersionSupportsGCLocalConfig(s1v) && localConfig != "" {
args = append(args, "--local-config", localConfig)
}
args = append(args, uuid.String())
debug("Execing %v", args)
c := exec.Cmd{
Path: args[0],
Args: args,
Stderr: os.Stderr,
Dir: pdir,
}
return c.Run()
}
// MountGC removes mounts from pods that couldn't be GCed cleanly.
func MountGC(path, uuid string) error {
err := common.ChrootPrivateUnmount(path, log, debug)
if err != nil {
return errwrap.Wrap(fmt.Errorf("error cleaning mounts for pod %s", uuid), err)
}
return nil
}