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package driver
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/seaweedfs/seaweedfs-csi-driver/pkg/datalocality"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/util"
)
// Implements Mounter
type seaweedFsMounter struct {
volumeID string
path string
collection string
readOnly bool
driver *SeaweedFsDriver
volContext map[string]string
}
type seaweedFsUnmounter struct {
unmounter Unmounter
cacheDir string
}
const (
seaweedFsCmd = "weed"
)
func newSeaweedFsMounter(volumeID string, path string, collection string, readOnly bool, driver *SeaweedFsDriver, volContext map[string]string) (Mounter, error) {
return &seaweedFsMounter{
volumeID: volumeID,
path: path,
collection: collection,
readOnly: readOnly,
driver: driver,
volContext: volContext,
}, nil
}
func (seaweedFs *seaweedFsMounter) Mount(target string) (Unmounter, error) {
glog.V(0).Infof("mounting %v %s to %s", seaweedFs.driver.filers, seaweedFs.path, target)
var filers []string
for _, address := range seaweedFs.driver.filers {
filers = append(filers, string(address))
}
// CacheDirForRead should be always defined - we use temp dir in case it is not defined
// we need to use predictable cache path, because we need to clean it up on unstage
cacheDir := filepath.Join(seaweedFs.driver.CacheDir, seaweedFs.volumeID)
// Final args
args := []string{
"-logtostderr=true",
"mount",
"-dirAutoCreate=true",
"-umask=000",
fmt.Sprintf("-dir=%s", target),
fmt.Sprintf("-localSocket=%s", GetLocalSocket(seaweedFs.volumeID)),
fmt.Sprintf("-cacheDir=%s", cacheDir),
}
if seaweedFs.readOnly {
args = append(args, "-readOnly")
}
// Values for override-able args
// Whitelist for merging with volContext
argsMap := map[string]string{
"collection": seaweedFs.collection,
"filer": strings.Join(filers, ","),
"filer.path": seaweedFs.path,
"cacheCapacityMB": fmt.Sprint(seaweedFs.driver.CacheCapacityMB),
"concurrentWriters": fmt.Sprint(seaweedFs.driver.ConcurrentWriters),
"map.uid": seaweedFs.driver.UidMap,
"map.gid": seaweedFs.driver.GidMap,
"disk": "",
"dataCenter": "",
"replication": "",
"ttl": "",
"chunkSizeLimitMB": "",
"volumeServerAccess": "",
"readRetryTime": "",
}
// Handle DataLocality
dataLocality := seaweedFs.driver.DataLocality
// Try to override when set in context
if dataLocalityStr, ok := seaweedFs.volContext["dataLocality"]; ok {
// Convert to enum
dataLocalityRes, ok := datalocality.FromString(dataLocalityStr)
if !ok {
glog.Warning("volumeContext 'dataLocality' invalid")
} else {
dataLocality = dataLocalityRes
}
}
if err := CheckDataLocality(&dataLocality, &seaweedFs.driver.DataCenter); err != nil {
return nil, err
}
// Settings based on type
switch dataLocality {
case datalocality.Write_preferLocalDc:
argsMap["dataCenter"] = seaweedFs.driver.DataCenter
}
// volContext-parameter -> mount-arg
parameterArgMap := map[string]string{
"uidMap": "map.uid",
"gidMap": "map.gid",
"filerPath": "filer.path",
// volumeContext has "diskType", but mount-option is "disk", converting for backwards compatability
"diskType": "disk",
}
// Explicitly ignored volContext args e.g. handled somewhere else
ignoreArgs := []string{
"dataLocality",
}
// Merge volContext into argsMap with key-mapping
for arg, value := range seaweedFs.volContext {
if in_arr(ignoreArgs, arg) {
continue
}
// Check if key-mapping exists
newArg, ok := parameterArgMap[arg]
if ok {
arg = newArg
}
// Check if arg can be applied
if _, ok := argsMap[arg]; !ok {
glog.Warningf("VolumeContext '%s' ignored", arg)
continue
}
// Write to args-map
argsMap[arg] = value
}
// Convert Args-Map to args
for arg, value := range argsMap {
if value != "" { // ignore empty values
args = append(args, fmt.Sprintf("-%s=%s", arg, value))
}
}
u, err := fuseMount(target, seaweedFsCmd, args)
if err != nil {
glog.Errorf("mount %v %s to %s: %s", seaweedFs.driver.filers, seaweedFs.path, target, err)
}
return &seaweedFsUnmounter{unmounter: u, cacheDir: cacheDir}, err
}
func (su *seaweedFsUnmounter) Unmount() error {
err := su.unmounter.Unmount()
err2 := os.RemoveAll(su.cacheDir)
if err2 != nil {
glog.Warningf("error removing cache from: %s, err: %v", su.cacheDir, err2)
}
return err
}
func GetLocalSocket(volumeID string) string {
montDirHash := util.HashToInt32([]byte(volumeID))
if montDirHash < 0 {
montDirHash = -montDirHash
}
socket := fmt.Sprintf("/tmp/seaweedfs-mount-%d.sock", montDirHash)
return socket
}
func in_arr(arr []string, val string) bool {
for _, v := range arr {
if val == v {
return true
}
}
return false
}
|
