driver.go

/*
Copyright 2020 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 sfs

import (
	"fmt"
	"strings"

	"github.com/FlexibleEngineCloud/flexibleengine-sfs-csi-driver/pkg/config"
	"github.com/container-storage-interface/spec/lib/go/csi"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"k8s.io/klog"
)

const (
	driverName = "sfs.csi.huaweicloud.com"
)

var (
	version = "1.0.0"
)

type SfsDriver struct {
	name       string
	nodeID     string
	version    string
	endpoint   string
	shareProto string
	cloud      config.CloudCredentials

	ids *identityServer
	cs  *controllerServer
	ns  *nodeServer

	vcap  []*csi.VolumeCapability_AccessMode
	cscap []*csi.ControllerServiceCapability
	nscap []*csi.NodeServiceCapability
}

func NewDriver(nodeID, endpoint, shareProto string, cloud config.CloudCredentials) *SfsDriver {
	klog.Infof("Driver: %v version: %v", driverName, version)

	d := &SfsDriver{}
	d.name = driverName
	d.nodeID = nodeID
	d.version = version
	d.endpoint = endpoint
	d.shareProto = strings.ToUpper(shareProto)
	d.cloud = cloud

	d.AddControllerServiceCapabilities(
		[]csi.ControllerServiceCapability_RPC_Type{
			csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
		})
	d.AddVolumeCapabilityAccessModes([]csi.VolumeCapability_AccessMode_Mode{
		csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER,
		csi.VolumeCapability_AccessMode_MULTI_NODE_SINGLE_WRITER,
		csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY,
		csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
		csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY,
	})

	d.ids = NewIdentityServer(d)
	d.cs = NewControllerServer(d)
	d.ns = NewNodeServer(d)

	return d
}

func (d *SfsDriver) AddControllerServiceCapabilities(cl []csi.ControllerServiceCapability_RPC_Type) {
	var csc []*csi.ControllerServiceCapability

	for _, c := range cl {
		klog.Infof("Enabling controller service capability: %v", c.String())
		csc = append(csc, NewControllerServiceCapability(c))
	}

	d.cscap = csc

	return
}

func (d *SfsDriver) AddVolumeCapabilityAccessModes(vc []csi.VolumeCapability_AccessMode_Mode) []*csi.VolumeCapability_AccessMode {
	var vca []*csi.VolumeCapability_AccessMode
	for _, c := range vc {
		klog.Infof("Enabling volume access mode: %v", c.String())
		vca = append(vca, NewVolumeCapabilityAccessMode(c))
	}
	d.vcap = vca
	return vca
}

func (d *SfsDriver) ValidateControllerServiceRequest(c csi.ControllerServiceCapability_RPC_Type) error {
	if c == csi.ControllerServiceCapability_RPC_UNKNOWN {
		return nil
	}

	for _, cap := range d.cscap {
		if c == cap.GetRpc().GetType() {
			return nil
		}
	}
	return status.Error(codes.InvalidArgument, fmt.Sprintf("%s", c))
}

func (d *SfsDriver) GetVolumeCapabilityAccessModes() []*csi.VolumeCapability_AccessMode {
	return d.vcap
}

func (d *SfsDriver) Run() {
	RunControllerandNodePublishServer(d.endpoint, d.ids, d.cs, d.ns)
}