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123 lines
3.6 KiB
Go
123 lines
3.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package flexvolume
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import (
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"time"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/pkg/volume"
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)
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type flexVolumeAttacher struct {
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plugin *flexVolumeAttachablePlugin
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}
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var _ volume.Attacher = &flexVolumeAttacher{}
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var _ volume.DeviceMounter = &flexVolumeAttacher{}
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// Attach is part of the volume.Attacher interface
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func (a *flexVolumeAttacher) Attach(spec *volume.Spec, hostName types.NodeName) (string, error) {
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call := a.plugin.NewDriverCall(attachCmd)
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call.AppendSpec(spec, a.plugin.host, nil)
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call.Append(string(hostName))
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status, err := call.Run()
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if isCmdNotSupportedErr(err) {
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return (*attacherDefaults)(a).Attach(spec, hostName)
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} else if err != nil {
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return "", err
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}
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return status.DevicePath, err
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}
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// WaitForAttach is part of the volume.Attacher interface
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func (a *flexVolumeAttacher) WaitForAttach(spec *volume.Spec, devicePath string, _ *v1.Pod, timeout time.Duration) (string, error) {
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call := a.plugin.NewDriverCallWithTimeout(waitForAttachCmd, timeout)
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call.Append(devicePath)
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call.AppendSpec(spec, a.plugin.host, nil)
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status, err := call.Run()
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if isCmdNotSupportedErr(err) {
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return (*attacherDefaults)(a).WaitForAttach(spec, devicePath, timeout)
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} else if err != nil {
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return "", err
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}
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return status.DevicePath, nil
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}
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// GetDeviceMountPath is part of the volume.Attacher interface
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func (a *flexVolumeAttacher) GetDeviceMountPath(spec *volume.Spec) (string, error) {
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return a.plugin.getDeviceMountPath(spec)
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}
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// MountDevice is part of the volume.Attacher interface
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func (a *flexVolumeAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string) error {
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// Mount only once.
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alreadyMounted, err := prepareForMount(a.plugin.host.GetMounter(a.plugin.GetPluginName()), deviceMountPath)
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if err != nil {
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return err
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}
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if alreadyMounted {
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return nil
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}
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call := a.plugin.NewDriverCall(mountDeviceCmd)
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call.Append(deviceMountPath)
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call.Append(devicePath)
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call.AppendSpec(spec, a.plugin.host, nil)
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_, err = call.Run()
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if isCmdNotSupportedErr(err) {
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// Devicepath is empty if the plugin does not support attach calls. Ignore mountDevice calls if the
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// plugin does not implement attach interface.
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if devicePath != "" {
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return (*attacherDefaults)(a).MountDevice(spec, devicePath, deviceMountPath, a.plugin.host.GetMounter(a.plugin.GetPluginName()))
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}
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return nil
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}
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return err
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}
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func (a *flexVolumeAttacher) VolumesAreAttached(specs []*volume.Spec, nodeName types.NodeName) (map[*volume.Spec]bool, error) {
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volumesAttachedCheck := make(map[*volume.Spec]bool)
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for _, spec := range specs {
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volumesAttachedCheck[spec] = true
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call := a.plugin.NewDriverCall(isAttached)
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call.AppendSpec(spec, a.plugin.host, nil)
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call.Append(string(nodeName))
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status, err := call.Run()
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if isCmdNotSupportedErr(err) {
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return nil, nil
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} else if err == nil {
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if !status.Attached {
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volumesAttachedCheck[spec] = false
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klog.V(2).Infof("VolumesAreAttached: check volume (%q) is no longer attached", spec.Name())
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}
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} else {
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return nil, err
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}
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}
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return volumesAttachedCheck, nil
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}
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