ceph-csi/vendor/github.com/kubernetes-csi/drivers/pkg/hostpath/hostpath.go

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/*
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 hostpath
import (
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"fmt"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/golang/glog"
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timestamp "github.com/golang/protobuf/ptypes/timestamp"
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"github.com/kubernetes-csi/drivers/pkg/csi-common"
)
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const (
kib int64 = 1024
mib int64 = kib * 1024
gib int64 = mib * 1024
gib100 int64 = gib * 100
tib int64 = gib * 1024
tib100 int64 = tib * 100
)
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type hostPath struct {
driver *csicommon.CSIDriver
ids *identityServer
ns *nodeServer
cs *controllerServer
cap []*csi.VolumeCapability_AccessMode
cscap []*csi.ControllerServiceCapability
}
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type hostPathVolume struct {
VolName string `json:"volName"`
VolID string `json:"volID"`
VolSize int64 `json:"volSize"`
VolPath string `json:"volPath"`
}
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type hostPathSnapshot struct {
Name string `json:"name"`
Id string `json:"id"`
VolID string `json:"volID"`
Path string `json:"path"`
CreationTime timestamp.Timestamp `json:"creationTime"`
SizeBytes int64 `json:"sizeBytes"`
ReadyToUse bool `json:"readyToUse"`
}
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var hostPathVolumes map[string]hostPathVolume
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var hostPathVolumeSnapshots map[string]hostPathSnapshot
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var (
hostPathDriver *hostPath
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vendorVersion = "dev"
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)
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func init() {
hostPathVolumes = map[string]hostPathVolume{}
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hostPathVolumeSnapshots = map[string]hostPathSnapshot{}
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}
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func GetHostPathDriver() *hostPath {
return &hostPath{}
}
func NewIdentityServer(d *csicommon.CSIDriver) *identityServer {
return &identityServer{
DefaultIdentityServer: csicommon.NewDefaultIdentityServer(d),
}
}
func NewControllerServer(d *csicommon.CSIDriver) *controllerServer {
return &controllerServer{
DefaultControllerServer: csicommon.NewDefaultControllerServer(d),
}
}
func NewNodeServer(d *csicommon.CSIDriver) *nodeServer {
return &nodeServer{
DefaultNodeServer: csicommon.NewDefaultNodeServer(d),
}
}
func (hp *hostPath) Run(driverName, nodeID, endpoint string) {
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glog.Infof("Driver: %v ", driverName)
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glog.Infof("Version: %s", vendorVersion)
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// Initialize default library driver
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hp.driver = csicommon.NewCSIDriver(driverName, vendorVersion, nodeID)
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if hp.driver == nil {
glog.Fatalln("Failed to initialize CSI Driver.")
}
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hp.driver.AddControllerServiceCapabilities(
[]csi.ControllerServiceCapability_RPC_Type{
csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
})
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hp.driver.AddVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER})
// Create GRPC servers
hp.ids = NewIdentityServer(hp.driver)
hp.ns = NewNodeServer(hp.driver)
hp.cs = NewControllerServer(hp.driver)
s := csicommon.NewNonBlockingGRPCServer()
s.Start(endpoint, hp.ids, hp.cs, hp.ns)
s.Wait()
}
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func getVolumeByID(volumeID string) (hostPathVolume, error) {
if hostPathVol, ok := hostPathVolumes[volumeID]; ok {
return hostPathVol, nil
}
return hostPathVolume{}, fmt.Errorf("volume id %s does not exit in the volumes list", volumeID)
}
func getVolumeByName(volName string) (hostPathVolume, error) {
for _, hostPathVol := range hostPathVolumes {
if hostPathVol.VolName == volName {
return hostPathVol, nil
}
}
return hostPathVolume{}, fmt.Errorf("volume name %s does not exit in the volumes list", volName)
}
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func getSnapshotByName(name string) (hostPathSnapshot, error) {
for _, snapshot := range hostPathVolumeSnapshots {
if snapshot.Name == name {
return snapshot, nil
}
}
return hostPathSnapshot{}, fmt.Errorf("snapshot name %s does not exit in the snapshots list", name)
}