sidecar: add volume replication service setup

adding sidecar service for the volume replication service. Signed-off-by: Rakshith R <[email protected]>
csi-addons · Aug 22, 2022 · cfb4fb9 · cfb4fb9
1 parent 34f5e6b
commit cfb4fb9
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diff --git a/internal/sidecar/service/volumereplication.go b/internal/sidecar/service/volumereplication.go
@@ -0,0 +1,193 @@
+/*
+Copyright 2022 The Kubernetes-CSI-Addons 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 service
+
+import (
+	"context"
+
+	kube "github.com/csi-addons/kubernetes-csi-addons/internal/kubernetes"
+	"github.com/csi-addons/kubernetes-csi-addons/internal/proto"
+	csiReplication "github.com/csi-addons/spec/lib/go/replication"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/klog/v2"
+)
+
+// ReplicationServer struct of sidecar with supported methods of proto
+// replication server spec and also containing replication
+// controller client to csi driver.
+type ReplicationServer struct {
+	proto.UnimplementedReplicationServer
+	controllerClient csiReplication.ControllerClient
+	kubeClient       *kubernetes.Clientset
+}
+
+// NewReplicationServer creates a new ReplicationServer which handles the proto.Replication
+// Service requests.
+func NewReplicationServer(c *grpc.ClientConn, kc *kubernetes.Clientset) *ReplicationServer {
+	return &ReplicationServer{
+		controllerClient: csiReplication.NewControllerClient(c),
+		kubeClient:       kc,
+	}
+}
+
+// RegisterService registers service with the server.
+func (rs *ReplicationServer) RegisterService(server grpc.ServiceRegistrar) {
+	proto.RegisterReplicationServer(server, rs)
+}
+
+// EnableVolumeReplication fetches required information from kubernetes cluster and calls
+// CSI-Addons EnableVolumeReplication service.
+func (rs *ReplicationServer) EnableVolumeReplication(
+	ctx context.Context,
+	req *proto.EnableVolumeReplicationRequest) (*proto.EnableVolumeReplicationResponse, error) {
+	// Get the secrets from the k8s cluster
+	data, err := kube.GetSecret(ctx, rs.kubeClient, req.GetSecretName(), req.GetSecretNamespace())
+	if err != nil {
+		klog.Errorf("Failed to get secret %s in namespace %s: %v", req.GetSecretName(), req.GetSecretNamespace(), err)
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	_, err = rs.controllerClient.EnableVolumeReplication(ctx,
+		&csiReplication.EnableVolumeReplicationRequest{
+			VolumeId:      req.VolumeId,
+			ReplicationId: req.ReplicationId,
+			Parameters:    req.Parameters,
+			Secrets:       data,
+		})
+	if err != nil {
+		klog.Errorf("Failed to enable volume replication: %v", err)
+		return nil, err
+	}
+
+	return &proto.EnableVolumeReplicationResponse{}, nil
+}
+
+// DisableVolumeReplication fetches required information from kubernetes cluster and calls
+// CSI-Addons DisableVolumeReplication service.
+func (rs *ReplicationServer) DisableVolumeReplication(
+	ctx context.Context,
+	req *proto.DisableVolumeReplicationRequest) (*proto.DisableVolumeReplicationResponse, error) {
+	// Get the secrets from the k8s cluster
+	data, err := kube.GetSecret(ctx, rs.kubeClient, req.GetSecretName(), req.GetSecretNamespace())
+	if err != nil {
+		klog.Errorf("Failed to get secret %s in namespace %s: %v", req.GetSecretName(), req.GetSecretNamespace(), err)
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	_, err = rs.controllerClient.DisableVolumeReplication(ctx,
+		&csiReplication.DisableVolumeReplicationRequest{
+			VolumeId:      req.VolumeId,
+			ReplicationId: req.ReplicationId,
+			Parameters:    req.Parameters,
+			Secrets:       data,
+		})
+	if err != nil {
+		klog.Errorf("Failed to enable volume replication: %v", err)
+		return nil, err
+	}
+
+	return &proto.DisableVolumeReplicationResponse{}, nil
+}
+
+// PromoteVolume fetches required information from kubernetes cluster and calls
+// CSI-Addons PromoteVolume service.
+func (rs *ReplicationServer) PromoteVolume(
+	ctx context.Context,
+	req *proto.PromoteVolumeRequest) (*proto.PromoteVolumeResponse, error) {
+	// Get the secrets from the k8s cluster
+	data, err := kube.GetSecret(ctx, rs.kubeClient, req.GetSecretName(), req.GetSecretNamespace())
+	if err != nil {
+		klog.Errorf("Failed to get secret %s in namespace %s: %v", req.GetSecretName(), req.GetSecretNamespace(), err)
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	_, err = rs.controllerClient.PromoteVolume(ctx,
+		&csiReplication.PromoteVolumeRequest{
+			VolumeId:      req.VolumeId,
+			ReplicationId: req.ReplicationId,
+			Force:         req.Force,
+			Parameters:    req.Parameters,
+			Secrets:       data,
+		})
+	if err != nil {
+		klog.Errorf("Failed to enable volume replication: %v", err)
+		return nil, err
+	}
+
+	return &proto.PromoteVolumeResponse{}, nil
+}
+
+// DemoteVolume fetches required information from kubernetes cluster and calls
+// CSI-Addons DemoteVolume service.
+func (rs *ReplicationServer) DemoteVolume(
+	ctx context.Context,
+	req *proto.DemoteVolumeRequest) (*proto.DemoteVolumeResponse, error) {
+	// Get the secrets from the k8s cluster
+	data, err := kube.GetSecret(ctx, rs.kubeClient, req.GetSecretName(), req.GetSecretNamespace())
+	if err != nil {
+		klog.Errorf("Failed to get secret %s in namespace %s: %v", req.GetSecretName(), req.GetSecretNamespace(), err)
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	_, err = rs.controllerClient.DemoteVolume(ctx,
+		&csiReplication.DemoteVolumeRequest{
+			VolumeId:      req.VolumeId,
+			ReplicationId: req.ReplicationId,
+			Force:         req.Force,
+			Parameters:    req.Parameters,
+			Secrets:       data,
+		})
+	if err != nil {
+		klog.Errorf("Failed to enable volume replication: %v", err)
+		return nil, err
+	}
+
+	return &proto.DemoteVolumeResponse{}, nil
+}
+
+// ResyncVolume fetches required information from kubernetes cluster and calls
+// CSI-Addons ResyncVolume service.
+func (rs *ReplicationServer) ResyncVolume(
+	ctx context.Context,
+	req *proto.ResyncVolumeRequest) (*proto.ResyncVolumeResponse, error) {
+	// Get the secrets from the k8s cluster
+	data, err := kube.GetSecret(ctx, rs.kubeClient, req.GetSecretName(), req.GetSecretNamespace())
+	if err != nil {
+		klog.Errorf("Failed to get secret %s in namespace %s: %v", req.GetSecretName(), req.GetSecretNamespace(), err)
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	resp, err := rs.controllerClient.ResyncVolume(ctx,
+		&csiReplication.ResyncVolumeRequest{
+			VolumeId:      req.VolumeId,
+			ReplicationId: req.ReplicationId,
+			Force:         req.Force,
+			Parameters:    req.Parameters,
+			Secrets:       data,
+		})
+	if err != nil {
+		klog.Errorf("Failed to enable volume replication: %v", err)
+		return nil, err
+	}
+
+	return &proto.ResyncVolumeResponse{
+		Ready: resp.Ready,
+	}, nil
+}
diff --git a/sidecar/main.go b/sidecar/main.go
@@ -96,6 +96,7 @@ func main() {
 	sidecarServer.RegisterService(service.NewIdentityServer(csiClient.GetGRPCClient()))
 	sidecarServer.RegisterService(service.NewReclaimSpaceServer(csiClient.GetGRPCClient(), kubeClient, *stagingPath))
 	sidecarServer.RegisterService(service.NewNetworkFenceServer(csiClient.GetGRPCClient(), kubeClient))
+	sidecarServer.RegisterService(service.NewReplicationServer(csiClient.GetGRPCClient(), kubeClient))
 
 	sidecarServer.Start()
 }