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controller.go
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controller.go
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// Copyright (c) 2023 ScyllaDB.
package driver
import (
"context"
"fmt"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
"github.com/scylladb/k8s-local-volume-provisioner/pkg/driver/volume"
"github.com/scylladb/k8s-local-volume-provisioner/pkg/util/slices"
"github.com/scylladb/k8s-local-volume-provisioner/pkg/util/uuid"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/klog/v2"
)
func (d *driver) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
klog.V(4).InfoS("New request", "server", "controller", "function", "CreateVolume", "request", protosanitizer.StripSecrets(req))
if len(req.GetName()) == 0 {
return nil, status.Error(codes.InvalidArgument, "Name missing in request")
}
caps := req.GetVolumeCapabilities()
if caps == nil {
return nil, status.Error(codes.InvalidArgument, "Volume Capabilities missing in request")
}
err := d.validateVolumeCapabilities(caps)
if err != nil {
return nil, status.Error(codes.InvalidArgument, fmt.Sprintf("Unsupported volume capabilities: %v", err))
}
parameters := req.GetParameters()
err = d.validateVolumeParameters(parameters)
if err != nil {
return nil, status.Error(codes.InvalidArgument, fmt.Sprintf("Unsupported volume parameters: %v", err))
}
var accessTypeMount, accessTypeBlock bool
var requestedAccessType volume.AccessType
var requestedFilesystem string
for _, c := range caps {
if c.GetBlock() != nil {
accessTypeBlock = true
requestedAccessType = volume.BlockAccess
} else if c.GetMount() != nil {
accessTypeMount = true
requestedAccessType = volume.MountAccess
requestedFilesystem = c.GetMount().FsType
} else {
return nil, status.Errorf(codes.InvalidArgument, "Unsupported volume capability access type %v", c.GetAccessType())
}
}
if accessTypeBlock && accessTypeMount {
return nil, status.Error(codes.InvalidArgument, "Can't have both block and mount access type")
}
if !slices.Contains(d.volumeManager.SupportedAccessTypes(), requestedAccessType) {
return nil, status.Errorf(codes.InvalidArgument, "Unsupported access type")
}
if !slices.Contains(d.volumeManager.SupportedFilesystems(), requestedFilesystem) {
return nil, status.Errorf(codes.InvalidArgument, "Unsupported filesystem: %q", requestedFilesystem)
}
if req.AccessibilityRequirements != nil && len(req.AccessibilityRequirements.Requisite) > 0 {
if !equality.Semantic.DeepEqual(req.AccessibilityRequirements.Requisite, d.getVolumeAccessibleTopology()) {
return nil, status.Errorf(codes.ResourceExhausted, "Cannot satisfy accessibility requirements")
}
}
capacity := req.GetCapacityRange().GetRequiredBytes()
vs := d.volumeManager.GetVolumeStateByName(req.GetName())
if vs != nil {
if vs.Size != capacity {
return nil, status.Errorf(codes.AlreadyExists, "Volume with %q name but with different size already exist", req.GetName())
}
return &csi.CreateVolumeResponse{
Volume: &csi.Volume{
VolumeId: vs.ID,
CapacityBytes: capacity,
ContentSource: req.GetVolumeContentSource(),
AccessibleTopology: d.getVolumeAccessibleTopology(),
},
}, nil
}
volumeID := uuid.MustRandom().String()
// Serialize volume creation to ensure we won't allocate more than we actually can, as
// node capacity information is published in intervals.
d.mut.Lock()
defer d.mut.Unlock()
availableCapacity, err := d.volumeManager.GetAvailableCapacity()
if err != nil {
return nil, status.Errorf(codes.Internal, "Cannot check node capacity: %v", err)
}
if capacity > availableCapacity {
return nil, status.Errorf(codes.OutOfRange, "Requested capacity is bigger than available: %d", availableCapacity)
}
err = d.volumeManager.CreateVolume(volumeID, req.GetName(), capacity, requestedAccessType)
if err != nil {
return nil, status.Errorf(codes.Internal, "Can't create volume: %s", err)
}
return &csi.CreateVolumeResponse{
Volume: &csi.Volume{
VolumeId: volumeID,
CapacityBytes: req.GetCapacityRange().GetRequiredBytes(),
ContentSource: req.GetVolumeContentSource(),
AccessibleTopology: d.getVolumeAccessibleTopology(),
},
}, nil
}
func (d *driver) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
klog.V(4).InfoS("New request", "server", "controller", "function", "DeleteVolume", "request", protosanitizer.StripSecrets(req))
volID := req.GetVolumeId()
if volID == "" {
return nil, status.Error(codes.InvalidArgument, "Volume ID not provided")
}
err := d.volumeManager.DeleteVolume(volID)
if err != nil {
return nil, status.Errorf(codes.Internal, "Failed to delete volume: %v", err)
}
return &csi.DeleteVolumeResponse{}, nil
}
func (d *driver) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error) {
klog.V(4).InfoS("New request", "server", "controller", "function", "GetCapacity", "request", protosanitizer.StripSecrets(req))
capacity, err := d.volumeManager.GetAvailableCapacity()
if err != nil {
return nil, status.Errorf(codes.Internal, "Cannot check node capacity: %v", err)
}
return &csi.GetCapacityResponse{
AvailableCapacity: capacity,
}, nil
}
func (d *driver) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
volumeID := req.GetVolumeId()
if len(volumeID) == 0 {
return nil, status.Error(codes.InvalidArgument, "VolumeID is missing in request")
}
v := d.volumeManager.GetVolumeStateByID(volumeID)
if v == nil {
return nil, status.Errorf(codes.NotFound, "Volume with VolumeID %q does not exists", volumeID)
}
volumeContext := req.GetVolumeContext()
if len(volumeContext) != 0 {
return nil, status.Errorf(codes.InvalidArgument, "Expected VolumeContext to be empty but got %v", volumeContext)
}
caps := req.GetVolumeCapabilities()
if caps == nil {
return nil, status.Error(codes.InvalidArgument, "Volume Capabilities are missing in request")
}
err := d.validateVolumeCapabilities(caps)
if err != nil {
return nil, status.Error(codes.InvalidArgument, fmt.Sprintf("Unsupported volume capabilites: %s", err))
}
parameters := req.GetParameters()
err = d.validateVolumeParameters(parameters)
if err != nil {
return nil, status.Error(codes.InvalidArgument, fmt.Sprintf("Unsupported volume parameters: %s", err))
}
return &csi.ValidateVolumeCapabilitiesResponse{
Confirmed: &csi.ValidateVolumeCapabilitiesResponse_Confirmed{
VolumeCapabilities: req.GetVolumeCapabilities(),
VolumeContext: req.GetVolumeContext(),
Parameters: req.GetParameters(),
},
}, nil
}
func (d *driver) ControllerGetCapabilities(ctx context.Context, request *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error) {
cs := []csi.ControllerServiceCapability_RPC_Type{
csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
csi.ControllerServiceCapability_RPC_GET_CAPACITY,
}
var csc []*csi.ControllerServiceCapability
for _, c := range cs {
csc = append(csc, &csi.ControllerServiceCapability{
Type: &csi.ControllerServiceCapability_Rpc{
Rpc: &csi.ControllerServiceCapability_RPC{
Type: c,
},
},
})
}
return &csi.ControllerGetCapabilitiesResponse{
Capabilities: csc,
}, nil
}