mirror of https://github.com/k3s-io/k3s
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
|
// Copyright 2016 Google Inc. All Rights Reserved.
|
||
|
|
//
|
||
|
|
// 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.
|
||
|
|
|
||
|
|
package docker
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"os"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
dockertypes "github.com/docker/docker/api/types"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
DockerInfoDriver = "Driver"
|
||
|
|
DockerInfoDriverStatus = "DriverStatus"
|
||
|
|
DriverStatusPoolName = "Pool Name"
|
||
|
|
DriverStatusDataLoopFile = "Data loop file"
|
||
|
|
DriverStatusMetadataFile = "Metadata file"
|
||
|
|
DriverStatusParentDataset = "Parent Dataset"
|
||
|
|
)
|
||
|
|
|
||
|
|
func DriverStatusValue(status [][2]string, target string) string {
|
||
|
|
for _, v := range status {
|
||
|
|
if strings.EqualFold(v[0], target) {
|
||
|
|
return v[1]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
func DockerThinPoolName(info dockertypes.Info) (string, error) {
|
||
|
|
poolName := DriverStatusValue(info.DriverStatus, DriverStatusPoolName)
|
||
|
|
if len(poolName) == 0 {
|
||
|
|
return "", fmt.Errorf("Could not get devicemapper pool name")
|
||
|
|
}
|
||
|
|
|
||
|
|
return poolName, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func DockerMetadataDevice(info dockertypes.Info) (string, error) {
|
||
|
|
metadataDevice := DriverStatusValue(info.DriverStatus, DriverStatusMetadataFile)
|
||
|
|
if len(metadataDevice) != 0 {
|
||
|
|
return metadataDevice, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
poolName, err := DockerThinPoolName(info)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
metadataDevice = fmt.Sprintf("/dev/mapper/%s_tmeta", poolName)
|
||
|
|
|
||
|
|
if _, err := os.Stat(metadataDevice); err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
return metadataDevice, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func DockerZfsFilesystem(info dockertypes.Info) (string, error) {
|
||
|
|
filesystem := DriverStatusValue(info.DriverStatus, DriverStatusParentDataset)
|
||
|
|
if len(filesystem) == 0 {
|
||
|
|
return "", fmt.Errorf("Could not get zfs filesystem")
|
||
|
|
}
|
||
|
|
|
||
|
|
return filesystem, nil
|
||
|
|
}
|