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iscsi.go
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/
iscsi.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 iscsi
import (
"encoding/json"
"fmt"
"strings"
"github.com/container-storage-interface/spec/lib/go/csi"
"k8s.io/kubernetes/pkg/util/mount"
"k8s.io/kubernetes/pkg/volume/util"
)
func getISCSIInfo(req *csi.NodePublishVolumeRequest) (*iscsiDisk, error) {
volName := req.GetVolumeId()
tp := req.GetVolumeContext()["targetPortal"]
iqn := req.GetVolumeContext()["iqn"]
lun := req.GetVolumeContext()["lun"]
if tp == "" || iqn == "" || lun == "" {
return nil, fmt.Errorf("iSCSI target information is missing")
}
portalList := req.GetVolumeContext()["portals"]
secretParams := req.GetVolumeContext()["secret"]
secret := parseSecret(secretParams)
portal := portalMounter(tp)
var bkportal []string
bkportal = append(bkportal, portal)
portals := []string{}
if err := json.Unmarshal([]byte(portalList), &portals); err != nil {
return nil, err
}
for _, portal := range portals {
bkportal = append(bkportal, portalMounter(string(portal)))
}
iface := req.GetVolumeContext()["iscsiInterface"]
initiatorName := req.GetVolumeContext()["initiatorName"]
chapDiscovery := false
if req.GetVolumeContext()["discoveryCHAPAuth"] == "true" {
chapDiscovery = true
}
chapSession := false
if req.GetVolumeContext()["sessionCHAPAuth"] == "true" {
chapSession = true
}
return &iscsiDisk{
VolName: volName,
Portals: bkportal,
Iqn: iqn,
lun: lun,
Iface: iface,
chap_discovery: chapDiscovery,
chap_session: chapSession,
secret: secret,
InitiatorName: initiatorName}, nil
}
func getISCSIDiskMounter(iscsiInfo *iscsiDisk, req *csi.NodePublishVolumeRequest) *iscsiDiskMounter {
readOnly := req.GetReadonly()
fsType := req.GetVolumeCapability().GetMount().GetFsType()
mountOptions := req.GetVolumeCapability().GetMount().GetMountFlags()
return &iscsiDiskMounter{
iscsiDisk: iscsiInfo,
fsType: fsType,
readOnly: readOnly,
mountOptions: mountOptions,
mounter: &mount.SafeFormatAndMount{Interface: mount.New(""), Exec: mount.NewOsExec()},
exec: mount.NewOsExec(),
targetPath: req.GetTargetPath(),
deviceUtil: util.NewDeviceHandler(util.NewIOHandler()),
}
}
func getISCSIDiskUnmounter(req *csi.NodeUnpublishVolumeRequest) *iscsiDiskUnmounter {
return &iscsiDiskUnmounter{
iscsiDisk: &iscsiDisk{
VolName: req.GetVolumeId(),
},
mounter: mount.New(""),
exec: mount.NewOsExec(),
}
}
func portalMounter(portal string) string {
if !strings.Contains(portal, ":") {
portal = portal + ":3260"
}
return portal
}
func parseSecret(secretParams string) map[string]string {
var secret map[string]string
if err := json.Unmarshal([]byte(secretParams), &secret); err != nil {
return nil
}
return secret
}
type iscsiDisk struct {
Portals []string
Iqn string
lun string
Iface string
chap_discovery bool
chap_session bool
secret map[string]string
InitiatorName string
VolName string
}
type iscsiDiskMounter struct {
*iscsiDisk
readOnly bool
fsType string
mountOptions []string
mounter *mount.SafeFormatAndMount
exec mount.Exec
deviceUtil util.DeviceUtil
targetPath string
}
type iscsiDiskUnmounter struct {
*iscsiDisk
mounter mount.Interface
exec mount.Exec
}