| // +build linux |
| |
| /* |
| Copyright 2017 The Kubernetes 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. |
| */ |
| |
| package resizefs |
| |
| import ( |
| "fmt" |
| |
| "k8s.io/klog" |
| "k8s.io/kubernetes/pkg/util/mount" |
| ) |
| |
| // ResizeFs Provides support for resizing file systems |
| type ResizeFs struct { |
| mounter *mount.SafeFormatAndMount |
| } |
| |
| // NewResizeFs returns new instance of resizer |
| func NewResizeFs(mounter *mount.SafeFormatAndMount) *ResizeFs { |
| return &ResizeFs{mounter: mounter} |
| } |
| |
| // Resize perform resize of file system |
| func (resizefs *ResizeFs) Resize(devicePath string, deviceMountPath string) (bool, error) { |
| format, err := resizefs.mounter.GetDiskFormat(devicePath) |
| |
| if err != nil { |
| formatErr := fmt.Errorf("ResizeFS.Resize - error checking format for device %s: %v", devicePath, err) |
| return false, formatErr |
| } |
| |
| // If disk has no format, there is no need to resize the disk because mkfs.* |
| // by default will use whole disk anyways. |
| if format == "" { |
| return false, nil |
| } |
| |
| klog.V(3).Infof("ResizeFS.Resize - Expanding mounted volume %s", devicePath) |
| switch format { |
| case "ext3", "ext4": |
| return resizefs.extResize(devicePath) |
| case "xfs": |
| return resizefs.xfsResize(deviceMountPath) |
| } |
| return false, fmt.Errorf("ResizeFS.Resize - resize of format %s is not supported for device %s mounted at %s", format, devicePath, deviceMountPath) |
| } |
| |
| func (resizefs *ResizeFs) extResize(devicePath string) (bool, error) { |
| output, err := resizefs.mounter.Exec.Run("resize2fs", devicePath) |
| if err == nil { |
| klog.V(2).Infof("Device %s resized successfully", devicePath) |
| return true, nil |
| } |
| |
| resizeError := fmt.Errorf("resize of device %s failed: %v. resize2fs output: %s", devicePath, err, string(output)) |
| return false, resizeError |
| |
| } |
| |
| func (resizefs *ResizeFs) xfsResize(deviceMountPath string) (bool, error) { |
| args := []string{"-d", deviceMountPath} |
| output, err := resizefs.mounter.Exec.Run("xfs_growfs", args...) |
| |
| if err == nil { |
| klog.V(2).Infof("Device %s resized successfully", deviceMountPath) |
| return true, nil |
| } |
| |
| resizeError := fmt.Errorf("resize of device %s failed: %v. xfs_growfs output: %s", deviceMountPath, err, string(output)) |
| return false, resizeError |
| } |