135 lines
4.6 KiB
Go
135 lines
4.6 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 main
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import (
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"context"
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"flag"
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"fmt"
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"net"
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"net/http"
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"os"
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"strings"
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"github.com/kubernetes-csi/csi-driver-smb/pkg/smb"
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"k8s.io/component-base/metrics/legacyregistry"
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"k8s.io/klog/v2"
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)
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func init() {
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klog.InitFlags(nil)
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}
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var (
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endpoint = flag.String("endpoint", "unix://tmp/csi.sock", "CSI endpoint")
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nodeID = flag.String("nodeid", "", "node id")
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driverName = flag.String("drivername", smb.DefaultDriverName, "name of the driver")
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ver = flag.Bool("ver", false, "Print the version and exit.")
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metricsAddress = flag.String("metrics-address", "", "export the metrics")
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kubeconfig = flag.String("kubeconfig", "", "Absolute path to the kubeconfig file. Required only when running out of cluster.")
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enableGetVolumeStats = flag.Bool("enable-get-volume-stats", true, "allow GET_VOLUME_STATS on agent node")
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removeSMBMappingDuringUnmount = flag.Bool("remove-smb-mapping-during-unmount", true, "remove SMBMapping during unmount on Windows node")
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workingMountDir = flag.String("working-mount-dir", "/tmp", "working directory for provisioner to mount smb shares temporarily")
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volStatsCacheExpireInMinutes = flag.Int("vol-stats-cache-expire-in-minutes", 10, "The cache expire time in minutes for volume stats cache")
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krb5CacheDirectory = flag.String("krb5-cache-directory", smb.DefaultKrb5CacheDirectory, "The directory for kerberos cache")
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krb5Prefix = flag.String("krb5-prefix", smb.DefaultKrb5CCName, "The prefix for kerberos cache")
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defaultOnDeletePolicy = flag.String("default-ondelete-policy", "", "default policy for deleting subdirectory when deleting a volume")
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removeArchivedVolumePath = flag.Bool("remove-archived-volume-path", true, "remove archived volume path in DeleteVolume")
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enableWindowsHostProcess = flag.Bool("enable-windows-host-process", false, "enable windows host process")
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)
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// exit is a separate function to handle program termination
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var exit = func(code int) {
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os.Exit(code)
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}
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func main() {
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flag.Parse()
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if *ver {
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info, err := smb.GetVersionYAML(*driverName)
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if err != nil {
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klog.Fatalln(err)
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}
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fmt.Println(info) // nolint
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} else {
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if *nodeID == "" {
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// nodeid is not needed in controller component
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klog.Warning("nodeid is empty")
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}
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exportMetrics()
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handle()
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}
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exit(0)
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}
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func handle() {
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driverOptions := smb.DriverOptions{
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NodeID: *nodeID,
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DriverName: *driverName,
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EnableGetVolumeStats: *enableGetVolumeStats,
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RemoveSMBMappingDuringUnmount: *removeSMBMappingDuringUnmount,
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RemoveArchivedVolumePath: *removeArchivedVolumePath,
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WorkingMountDir: *workingMountDir,
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VolStatsCacheExpireInMinutes: *volStatsCacheExpireInMinutes,
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Krb5CacheDirectory: *krb5CacheDirectory,
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Krb5Prefix: *krb5Prefix,
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DefaultOnDeletePolicy: *defaultOnDeletePolicy,
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EnableWindowsHostProcess: *enableWindowsHostProcess,
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}
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driver := smb.NewDriver(&driverOptions)
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driver.Run(*endpoint, *kubeconfig, false)
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}
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func exportMetrics() {
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if *metricsAddress == "" {
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return
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}
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l, err := net.Listen("tcp", *metricsAddress)
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if err != nil {
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klog.Warningf("failed to get listener for metrics endpoint: %v", err)
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return
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}
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serve(context.Background(), l, serveMetrics)
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}
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func serve(_ context.Context, l net.Listener, serveFunc func(net.Listener) error) {
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path := l.Addr().String()
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klog.V(2).Infof("set up prometheus server on %v", path)
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go func() {
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defer l.Close()
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if err := serveFunc(l); err != nil {
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klog.Fatalf("serve failure(%v), address(%v)", err, path)
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}
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}()
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}
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func serveMetrics(l net.Listener) error {
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m := http.NewServeMux()
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m.Handle("/metrics", legacyregistry.Handler())
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return trapClosedConnErr(http.Serve(l, m))
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}
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func trapClosedConnErr(err error) error {
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if err == nil {
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return nil
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}
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if strings.Contains(err.Error(), "use of closed network connection") {
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return nil
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}
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return err
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}
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