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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,198 @@ | ||
| /* | ||
| Copyright 2019 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 csi | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "net" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/container-storage-interface/spec/lib/go/csi" | ||
| "github.com/kubernetes-csi/csi-lib-utils/protosanitizer" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/connectivity" | ||
| "k8s.io/klog" | ||
| ) | ||
|
|
||
| // Client is a gRPC client connect to remote CSI driver and abstracts all CSI calls. | ||
| type Client interface { | ||
| // GetDriverName returns driver name as discovered by GetPluginInfo() | ||
| // gRPC call. | ||
| GetDriverName(ctx context.Context) (string, error) | ||
|
|
||
| // SupportsPluginControllerService return true if the CSI driver reports | ||
| // CONTROLLER_SERVICE in GetPluginCapabilities() gRPC call. | ||
| SupportsPluginControllerService(ctx context.Context) (bool, error) | ||
|
|
||
| // SupportsControllerResize returns whether the CSI driver reports EXPAND_VOLUME | ||
| // in ControllerGetCapabilities() gRPC call. | ||
| SupportsControllerResize(ctx context.Context) (bool, error) | ||
|
|
||
| // Expand expands the volume to a new size at least as big as requestBytes. | ||
| // It returns the new size and whether the volume need expand operation on the node. | ||
| Expand(ctx context.Context, volumeID string, requestBytes int64, secrets map[string]string) (int64, bool, error) | ||
|
|
||
| // Probe checks that the CSI driver is ready to process requests | ||
| Probe(ctx context.Context) error | ||
| } | ||
|
|
||
| // New creates a new CSI client. | ||
| func New(address string, timeout time.Duration) (Client, error) { | ||
| conn, err := newGRPCConnection(address, timeout) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &client{ | ||
| idClient: csi.NewIdentityClient(conn), | ||
| ctrlClient: csi.NewControllerClient(conn), | ||
| }, nil | ||
| } | ||
|
|
||
| type client struct { | ||
| idClient csi.IdentityClient | ||
| ctrlClient csi.ControllerClient | ||
| } | ||
|
|
||
| func (c *client) GetDriverName(ctx context.Context) (string, error) { | ||
| req := csi.GetPluginInfoRequest{} | ||
|
|
||
| resp, err := c.idClient.GetPluginInfo(ctx, &req) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| name := resp.GetName() | ||
| if name == "" { | ||
| return "", errors.New("driver name is empty") | ||
| } | ||
|
|
||
| return name, nil | ||
| } | ||
|
|
||
| func (c *client) SupportsPluginControllerService(ctx context.Context) (bool, error) { | ||
| rsp, err := c.idClient.GetPluginCapabilities(ctx, &csi.GetPluginCapabilitiesRequest{}) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| caps := rsp.GetCapabilities() | ||
| for _, capability := range caps { | ||
| if capability == nil { | ||
| continue | ||
| } | ||
| service := capability.GetService() | ||
| if service == nil { | ||
| continue | ||
| } | ||
| if service.GetType() == csi.PluginCapability_Service_CONTROLLER_SERVICE { | ||
| return true, nil | ||
| } | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| func (c *client) SupportsControllerResize(ctx context.Context) (bool, error) { | ||
| rsp, err := c.ctrlClient.ControllerGetCapabilities(ctx, &csi.ControllerGetCapabilitiesRequest{}) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| caps := rsp.GetCapabilities() | ||
| for _, capability := range caps { | ||
| if capability == nil { | ||
| continue | ||
| } | ||
| rpc := capability.GetRpc() | ||
| if rpc == nil { | ||
| continue | ||
| } | ||
| if rpc.GetType() == csi.ControllerServiceCapability_RPC_EXPAND_VOLUME { | ||
| return true, nil | ||
| } | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| func (c *client) Expand( | ||
| ctx context.Context, | ||
| volumeID string, | ||
| requestBytes int64, | ||
| secrets map[string]string) (int64, bool, error) { | ||
| req := &csi.ControllerExpandVolumeRequest{ | ||
| Secrets: secrets, | ||
| VolumeId: volumeID, | ||
| CapacityRange: &csi.CapacityRange{RequiredBytes: requestBytes}, | ||
| } | ||
| resp, err := c.ctrlClient.ControllerExpandVolume(ctx, req) | ||
| if err != nil { | ||
| return 0, false, err | ||
| } | ||
| return resp.CapacityBytes, resp.NodeExpansionRequired, nil | ||
| } | ||
|
|
||
| func (c *client) Probe(ctx context.Context) error { | ||
| resp, err := c.idClient.Probe(ctx, &csi.ProbeRequest{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if resp.Ready == nil || !resp.Ready.Value { | ||
| return errors.New("driver is still initializing") | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func newGRPCConnection(address string, timeout time.Duration) (*grpc.ClientConn, error) { | ||
| klog.V(2).Infof("Connecting to %s", address) | ||
| dialOptions := []grpc.DialOption{ | ||
| grpc.WithInsecure(), | ||
| grpc.WithBackoffMaxDelay(time.Second), | ||
| grpc.WithUnaryInterceptor(logGRPC), | ||
| } | ||
| if strings.HasPrefix(address, "/") { | ||
| dialOptions = append(dialOptions, grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) { | ||
| return net.DialTimeout("unix", addr, timeout) | ||
| })) | ||
| } | ||
| conn, err := grpc.Dial(address, dialOptions...) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ctx, cancel := context.WithTimeout(context.Background(), timeout) | ||
| defer cancel() | ||
| for { | ||
| if !conn.WaitForStateChange(ctx, conn.GetState()) { | ||
| klog.V(4).Infof("Connection timed out") | ||
| return conn, fmt.Errorf("Connection timed out") | ||
| } | ||
| if conn.GetState() == connectivity.Ready { | ||
| klog.V(3).Infof("Connected") | ||
| return conn, nil | ||
| } | ||
| klog.V(4).Infof("Still trying, connection is %s", conn.GetState()) | ||
| } | ||
| } | ||
|
|
||
| func logGRPC(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error { | ||
| klog.V(5).Infof("GRPC call: %s", method) | ||
| klog.V(5).Infof("GRPC request: %s", protosanitizer.StripSecrets(req)) | ||
| err := invoker(ctx, method, req, reply, cc, opts...) | ||
| klog.V(5).Infof("GRPC response: %s", protosanitizer.StripSecrets(reply)) | ||
| klog.V(5).Infof("GRPC error: %v", err) | ||
| return err | ||
| } |
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