606 lines
19 KiB
Go
606 lines
19 KiB
Go
// Copyright (c) Vitaliy Filippov, 2019+
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// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
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package vitastor
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"bytes"
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"strconv"
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"time"
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"os"
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"os/exec"
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"io/ioutil"
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"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
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"k8s.io/klog"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"google.golang.org/protobuf/types/known/timestamppb"
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"github.com/container-storage-interface/spec/lib/go/csi"
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)
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const (
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KB int64 = 1024
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MB int64 = 1024 * KB
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GB int64 = 1024 * MB
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TB int64 = 1024 * GB
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ETCD_TIMEOUT time.Duration = 15*time.Second
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)
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type InodeIndex struct
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{
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Id uint64 `json:"id"`
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PoolId uint64 `json:"pool_id"`
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}
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type InodeConfig struct
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{
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Name string `json:"name"`
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Size uint64 `json:"size,omitempty"`
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ParentPool uint64 `json:"parent_pool,omitempty"`
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ParentId uint64 `json:"parent_id,omitempty"`
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Readonly bool `json:"readonly,omitempty"`
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CreateTs uint64 `json:"create_ts,omitempty"`
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}
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type ControllerServer struct
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{
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*Driver
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}
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// NewControllerServer create new instance controller
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func NewControllerServer(driver *Driver) *ControllerServer
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{
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return &ControllerServer{
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Driver: driver,
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}
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}
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func GetConnectionParams(params map[string]string) (map[string]string, error)
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{
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ctxVars := make(map[string]string)
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configPath := params["configPath"]
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if (configPath == "")
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{
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configPath = "/etc/vitastor/vitastor.conf"
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}
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else
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{
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ctxVars["configPath"] = configPath
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}
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config := make(map[string]interface{})
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configFD, err := os.Open(configPath)
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if (err != nil)
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{
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return nil, err
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}
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defer configFD.Close()
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data, _ := ioutil.ReadAll(configFD)
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json.Unmarshal(data, &config)
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// Check etcd URL in the config, but do not use the explicit etcdUrl
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// parameter for CLI calls, otherwise users won't be able to later
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// change them - storage class parameters are saved in volume IDs
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var etcdUrl []string
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switch config["etcd_address"].(type)
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{
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case string:
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url := strings.TrimSpace(config["etcd_address"].(string))
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if (url != "")
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{
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etcdUrl = strings.Split(url, ",")
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}
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case []string:
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etcdUrl = config["etcd_address"].([]string)
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case []interface{}:
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for _, url := range config["etcd_address"].([]interface{})
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{
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s, ok := url.(string)
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if (ok)
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{
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etcdUrl = append(etcdUrl, s)
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}
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}
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}
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if (len(etcdUrl) == 0)
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{
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return nil, status.Error(codes.InvalidArgument, "etcd_address is missing in "+configPath)
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}
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return ctxVars, nil
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}
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func system(program string, args ...string) ([]byte, []byte, error)
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{
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klog.Infof("Running "+program+" "+strings.Join(args, " "))
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c := exec.Command(program, args...)
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var stdout, stderr bytes.Buffer
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c.Stdout, c.Stderr = &stdout, &stderr
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err := c.Run()
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if (err != nil)
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{
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stdoutStr, stderrStr := string(stdout.Bytes()), string(stderr.Bytes())
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klog.Errorf(program+" "+strings.Join(args, " ")+" failed: %s, status %s\n", stdoutStr+stderrStr, err)
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return nil, nil, status.Error(codes.Internal, stdoutStr+stderrStr+" (status "+err.Error()+")")
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}
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return stdout.Bytes(), stderr.Bytes(), nil
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}
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func invokeCLI(ctxVars map[string]string, args []string) ([]byte, error)
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{
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if (ctxVars["configPath"] != "")
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{
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args = append(args, "--config_path", ctxVars["configPath"])
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}
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stdout, _, err := system("/usr/bin/vitastor-cli", args...)
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return stdout, err
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}
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// Create the volume
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func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error)
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{
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klog.Infof("received controller create volume request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Errorf(codes.InvalidArgument, "request cannot be empty")
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}
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if (req.GetName() == "")
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{
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return nil, status.Error(codes.InvalidArgument, "name is a required field")
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}
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volumeCapabilities := req.GetVolumeCapabilities()
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if (volumeCapabilities == nil)
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{
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return nil, status.Error(codes.InvalidArgument, "volume capabilities is a required field")
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}
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etcdVolumePrefix := req.Parameters["etcdVolumePrefix"]
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poolId, _ := strconv.ParseUint(req.Parameters["poolId"], 10, 64)
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if (poolId == 0)
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{
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return nil, status.Error(codes.InvalidArgument, "poolId is missing in storage class configuration")
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}
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volName := etcdVolumePrefix + req.GetName()
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volSize := 1 * GB
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if capRange := req.GetCapacityRange(); capRange != nil
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{
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volSize = ((capRange.GetRequiredBytes() + MB - 1) / MB) * MB
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}
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ctxVars, err := GetConnectionParams(req.Parameters)
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if (err != nil)
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{
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return nil, err
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}
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args := []string{ "create", volName, "-s", fmt.Sprintf("%v", volSize), "--pool", fmt.Sprintf("%v", poolId) }
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// Support creation from snapshot
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var src *csi.VolumeContentSource
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if (req.VolumeContentSource.GetSnapshot() != nil)
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{
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snapId := req.VolumeContentSource.GetSnapshot().GetSnapshotId()
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if (snapId != "")
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{
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snapVars := make(map[string]string)
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err := json.Unmarshal([]byte(snapId), &snapVars)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "volume ID not in JSON format")
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}
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args = append(args, "--parent", snapVars["name"]+"@"+snapVars["snapshot"])
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src = &csi.VolumeContentSource{
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Type: &csi.VolumeContentSource_Snapshot{
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Snapshot: &csi.VolumeContentSource_SnapshotSource{
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SnapshotId: snapId,
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},
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},
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}
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}
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}
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// Create image using vitastor-cli
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_, err = invokeCLI(ctxVars, args)
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if (err != nil)
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{
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if (strings.Index(err.Error(), "already exists") > 0)
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{
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inodeCfg, err := invokeList(ctxVars, volName, true)
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if (err != nil)
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{
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return nil, err
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}
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if (inodeCfg[0].Size < uint64(volSize))
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{
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return nil, status.Error(codes.Internal, "image "+volName+" is already created, but size is less than expected")
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}
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}
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else
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{
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return nil, err
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}
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}
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ctxVars["name"] = volName
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volumeIdJson, _ := json.Marshal(ctxVars)
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return &csi.CreateVolumeResponse{
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Volume: &csi.Volume{
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// Ugly, but VolumeContext isn't passed to DeleteVolume :-(
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VolumeId: string(volumeIdJson),
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CapacityBytes: volSize,
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ContentSource: src,
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},
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}, nil
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}
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// DeleteVolume deletes the given volume
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func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error)
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{
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klog.Infof("received controller delete volume request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Error(codes.InvalidArgument, "request cannot be empty")
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}
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volVars := make(map[string]string)
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err := json.Unmarshal([]byte(req.VolumeId), &volVars)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "volume ID not in JSON format")
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}
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volName := volVars["name"]
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ctxVars, err := GetConnectionParams(volVars)
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if (err != nil)
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{
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return nil, err
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}
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_, err = invokeCLI(ctxVars, []string{ "rm", volName })
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if (err != nil)
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{
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return nil, err
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}
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return &csi.DeleteVolumeResponse{}, nil
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}
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// ControllerPublishVolume return Unimplemented error
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func (cs *ControllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error)
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{
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return nil, status.Error(codes.Unimplemented, "")
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}
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// ControllerUnpublishVolume return Unimplemented error
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func (cs *ControllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error)
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{
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return nil, status.Error(codes.Unimplemented, "")
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}
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// ValidateVolumeCapabilities checks whether the volume capabilities requested are supported.
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func (cs *ControllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error)
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{
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klog.Infof("received controller validate volume capability request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Errorf(codes.InvalidArgument, "request is nil")
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}
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volumeID := req.GetVolumeId()
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if (volumeID == "")
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{
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return nil, status.Error(codes.InvalidArgument, "volumeId is nil")
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}
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volumeCapabilities := req.GetVolumeCapabilities()
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if (volumeCapabilities == nil)
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{
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return nil, status.Error(codes.InvalidArgument, "volumeCapabilities is nil")
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}
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var volumeCapabilityAccessModes []*csi.VolumeCapability_AccessMode
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for _, mode := range []csi.VolumeCapability_AccessMode_Mode{
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csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
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csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER,
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} {
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volumeCapabilityAccessModes = append(volumeCapabilityAccessModes, &csi.VolumeCapability_AccessMode{Mode: mode})
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}
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capabilitySupport := false
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for _, capability := range volumeCapabilities
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{
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for _, volumeCapabilityAccessMode := range volumeCapabilityAccessModes
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{
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if (volumeCapabilityAccessMode.Mode == capability.AccessMode.Mode)
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{
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capabilitySupport = true
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}
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}
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}
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if (!capabilitySupport)
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{
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return nil, status.Errorf(codes.NotFound, "%v not supported", req.GetVolumeCapabilities())
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}
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return &csi.ValidateVolumeCapabilitiesResponse{
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Confirmed: &csi.ValidateVolumeCapabilitiesResponse_Confirmed{
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VolumeCapabilities: req.VolumeCapabilities,
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},
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}, nil
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}
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// ListVolumes returns a list of volumes
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func (cs *ControllerServer) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (*csi.ListVolumesResponse, error)
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{
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return nil, status.Error(codes.Unimplemented, "")
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}
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// GetCapacity returns the capacity of the storage pool
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func (cs *ControllerServer) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error)
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{
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return nil, status.Error(codes.Unimplemented, "")
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}
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// ControllerGetCapabilities returns the capabilities of the controller service.
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func (cs *ControllerServer) ControllerGetCapabilities(ctx context.Context, req *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error)
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{
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functionControllerServerCapabilities := func(cap csi.ControllerServiceCapability_RPC_Type) *csi.ControllerServiceCapability
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{
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return &csi.ControllerServiceCapability{
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Type: &csi.ControllerServiceCapability_Rpc{
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Rpc: &csi.ControllerServiceCapability_RPC{
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Type: cap,
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},
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},
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}
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}
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var controllerServerCapabilities []*csi.ControllerServiceCapability
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for _, capability := range []csi.ControllerServiceCapability_RPC_Type{
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME,
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csi.ControllerServiceCapability_RPC_LIST_VOLUMES,
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csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
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csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
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csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
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// TODO: csi.ControllerServiceCapability_RPC_CLONE_VOLUME,
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} {
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controllerServerCapabilities = append(controllerServerCapabilities, functionControllerServerCapabilities(capability))
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}
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return &csi.ControllerGetCapabilitiesResponse{
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Capabilities: controllerServerCapabilities,
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}, nil
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}
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func invokeList(ctxVars map[string]string, pattern string, expectExist bool) ([]InodeConfig, error)
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{
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stat, err := invokeCLI(ctxVars, []string{ "ls", "--json", pattern })
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if (err != nil)
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{
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return nil, err
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}
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var inodeCfg []InodeConfig
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err = json.Unmarshal(stat, &inodeCfg)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "Invalid JSON in vitastor-cli ls: "+err.Error())
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}
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if (expectExist && len(inodeCfg) == 0)
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{
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return nil, status.Error(codes.Internal, "Can't find expected image "+pattern+" via vitastor-cli ls")
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}
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return inodeCfg, nil
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}
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// CreateSnapshot create snapshot of an existing PV
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func (cs *ControllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error)
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{
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klog.Infof("received controller create snapshot request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Errorf(codes.InvalidArgument, "request cannot be empty")
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}
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if (req.SourceVolumeId == "" || req.Name == "")
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{
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return nil, status.Error(codes.InvalidArgument, "source volume ID and snapshot name are required fields")
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}
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// snapshot name
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snapName := req.Name
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// req.VolumeId is an ugly json string in our case :)
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ctxVars := make(map[string]string)
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err := json.Unmarshal([]byte(req.SourceVolumeId), &ctxVars)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "volume ID not in JSON format")
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}
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volName := ctxVars["name"]
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// Create image using vitastor-cli
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_, err = invokeCLI(ctxVars, []string{ "create", "--snapshot", snapName, volName })
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if (err != nil && strings.Index(err.Error(), "already exists") <= 0)
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{
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return nil, err
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}
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// Check created snapshot
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inodeCfg, err := invokeList(ctxVars, volName+"@"+snapName, true)
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if (err != nil)
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{
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return nil, err
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}
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// Use ugly JSON snapshot ID again, DeleteSnapshot doesn't have context :-(
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ctxVars["snapshot"] = snapName
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snapIdJson, _ := json.Marshal(ctxVars)
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return &csi.CreateSnapshotResponse{
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Snapshot: &csi.Snapshot{
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SizeBytes: int64(inodeCfg[0].Size),
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SnapshotId: string(snapIdJson),
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SourceVolumeId: req.SourceVolumeId,
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CreationTime: ×tamppb.Timestamp{ Seconds: int64(inodeCfg[0].CreateTs) },
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ReadyToUse: true,
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},
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}, nil
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}
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// DeleteSnapshot delete provided snapshot of a PV
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func (cs *ControllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error)
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{
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klog.Infof("received controller delete snapshot request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Errorf(codes.InvalidArgument, "request cannot be empty")
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}
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if (req.SnapshotId == "")
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{
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return nil, status.Error(codes.InvalidArgument, "snapshot ID is a required field")
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}
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volVars := make(map[string]string)
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err := json.Unmarshal([]byte(req.SnapshotId), &volVars)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "snapshot ID not in JSON format")
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}
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volName := volVars["name"]
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snapName := volVars["snapshot"]
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ctxVars, err := GetConnectionParams(volVars)
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if (err != nil)
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{
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return nil, err
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}
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_, err = invokeCLI(ctxVars, []string{ "rm", volName+"@"+snapName })
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if (err != nil)
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{
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return nil, err
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}
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return &csi.DeleteSnapshotResponse{}, nil
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}
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// ListSnapshots list the snapshots of a PV
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func (cs *ControllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error)
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{
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klog.Infof("received controller list snapshots request %+v", protosanitizer.StripSecrets(req))
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if (req == nil)
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{
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return nil, status.Error(codes.InvalidArgument, "request cannot be empty")
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}
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volVars := make(map[string]string)
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err := json.Unmarshal([]byte(req.SourceVolumeId), &volVars)
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if (err != nil)
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{
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return nil, status.Error(codes.Internal, "volume ID not in JSON format")
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}
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volName := volVars["name"]
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ctxVars, err := GetConnectionParams(volVars)
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if (err != nil)
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{
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return nil, err
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}
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inodeCfg, err := invokeList(ctxVars, volName+"@*", false)
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if (err != nil)
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{
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return nil, err
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}
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resp := &csi.ListSnapshotsResponse{}
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for _, ino := range inodeCfg
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{
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|
snapName := ino.Name[len(volName)+1:]
|
|
if (len(req.StartingToken) > 0 && snapName < req.StartingToken)
|
|
{
|
|
}
|
|
else if (req.MaxEntries == 0 || len(resp.Entries) < int(req.MaxEntries))
|
|
{
|
|
volVars["snapshot"] = snapName
|
|
snapIdJson, _ := json.Marshal(volVars)
|
|
resp.Entries = append(resp.Entries, &csi.ListSnapshotsResponse_Entry{
|
|
Snapshot: &csi.Snapshot{
|
|
SizeBytes: int64(ino.Size),
|
|
SnapshotId: string(snapIdJson),
|
|
SourceVolumeId: req.SourceVolumeId,
|
|
CreationTime: ×tamppb.Timestamp{ Seconds: int64(ino.CreateTs) },
|
|
ReadyToUse: true,
|
|
},
|
|
})
|
|
}
|
|
else
|
|
{
|
|
resp.NextToken = snapName
|
|
break
|
|
}
|
|
}
|
|
|
|
return resp, nil
|
|
}
|
|
|
|
// ControllerExpandVolume increases the size of a volume
|
|
func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error)
|
|
{
|
|
klog.Infof("received controller expand volume request %+v", protosanitizer.StripSecrets(req))
|
|
if (req == nil)
|
|
{
|
|
return nil, status.Error(codes.InvalidArgument, "request cannot be empty")
|
|
}
|
|
if (req.VolumeId == "" || req.CapacityRange == nil || req.CapacityRange.RequiredBytes == 0)
|
|
{
|
|
return nil, status.Error(codes.InvalidArgument, "VolumeId, CapacityRange and RequiredBytes are required fields")
|
|
}
|
|
|
|
volVars := make(map[string]string)
|
|
err := json.Unmarshal([]byte(req.VolumeId), &volVars)
|
|
if (err != nil)
|
|
{
|
|
return nil, status.Error(codes.Internal, "volume ID not in JSON format")
|
|
}
|
|
volName := volVars["name"]
|
|
ctxVars, err := GetConnectionParams(volVars)
|
|
if (err != nil)
|
|
{
|
|
return nil, err
|
|
}
|
|
|
|
inodeCfg, err := invokeList(ctxVars, volName, true)
|
|
if (err != nil)
|
|
{
|
|
return nil, err
|
|
}
|
|
|
|
if (req.CapacityRange.RequiredBytes > 0 && inodeCfg[0].Size < uint64(req.CapacityRange.RequiredBytes))
|
|
{
|
|
sz := ((req.CapacityRange.RequiredBytes+4095)/4096)*4096
|
|
_, err := invokeCLI(ctxVars, []string{ "modify", "--inc_size", "1", "--resize", fmt.Sprintf("%d", sz), volName })
|
|
if (err != nil)
|
|
{
|
|
return nil, err
|
|
}
|
|
inodeCfg, err = invokeList(ctxVars, volName, true)
|
|
if (err != nil)
|
|
{
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return &csi.ControllerExpandVolumeResponse{
|
|
CapacityBytes: int64(inodeCfg[0].Size),
|
|
NodeExpansionRequired: false,
|
|
}, nil
|
|
}
|
|
|
|
// ControllerGetVolume get volume info
|
|
func (cs *ControllerServer) ControllerGetVolume(ctx context.Context, req *csi.ControllerGetVolumeRequest) (*csi.ControllerGetVolumeResponse, error)
|
|
{
|
|
return nil, status.Error(codes.Unimplemented, "")
|
|
}
|