345d7587f3
Previously, multiple containers with the same mounted volume resulted in multiple FUSE processes. This behaviour was breaking parallel modifications from different containers, consumed extra resources, and after mounting via systemd was introduced, led to the total inability to mount the same volume into multiple containers on the same host. Now only one FUSE process is started per volume, per host.
88 lines
2.4 KiB
Go
88 lines
2.4 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 driver
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import (
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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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csicommon "github.com/kubernetes-csi/drivers/pkg/csi-common"
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)
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type driver struct {
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driver *csicommon.CSIDriver
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endpoint string
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ids *identityServer
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ns *nodeServer
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cs *controllerServer
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}
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var (
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vendorVersion = "v1.34.6"
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driverName = "ru.yandex.s3.csi"
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)
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// New initializes the driver
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func New(nodeID string, endpoint string) (*driver, error) {
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d := csicommon.NewCSIDriver(driverName, vendorVersion, nodeID)
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if d == nil {
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glog.Fatalln("Failed to initialize CSI Driver.")
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}
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s3Driver := &driver{
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endpoint: endpoint,
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driver: d,
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}
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return s3Driver, nil
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}
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func (s3 *driver) newIdentityServer(d *csicommon.CSIDriver) *identityServer {
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return &identityServer{
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DefaultIdentityServer: csicommon.NewDefaultIdentityServer(d),
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}
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}
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func (s3 *driver) newControllerServer(d *csicommon.CSIDriver) *controllerServer {
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return &controllerServer{
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DefaultControllerServer: csicommon.NewDefaultControllerServer(d),
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}
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}
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func (s3 *driver) newNodeServer(d *csicommon.CSIDriver) *nodeServer {
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return &nodeServer{
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DefaultNodeServer: csicommon.NewDefaultNodeServer(d),
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}
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}
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func (s3 *driver) Run() {
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glog.Infof("Driver: %v ", driverName)
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glog.Infof("Version: %v ", vendorVersion)
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// Initialize default library driver
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s3.driver.AddControllerServiceCapabilities([]csi.ControllerServiceCapability_RPC_Type{csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME})
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s3.driver.AddVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER})
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// Create GRPC servers
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s3.ids = s3.newIdentityServer(s3.driver)
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s3.ns = s3.newNodeServer(s3.driver)
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s3.cs = s3.newControllerServer(s3.driver)
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s := csicommon.NewNonBlockingGRPCServer()
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s.Start(s3.endpoint, s3.ids, s3.cs, s3.ns)
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s.Wait()
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}
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