mirror of
https://github.com/seaweedfs/seaweedfs.git
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73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
package shell
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import (
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"context"
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"flag"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/operation"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
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"google.golang.org/grpc"
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"io"
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)
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func init() {
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Commands = append(Commands, &commandVolumeServerLeave{})
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}
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type commandVolumeServerLeave struct {
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}
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func (c *commandVolumeServerLeave) Name() string {
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return "volumeServer.leave"
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}
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func (c *commandVolumeServerLeave) Help() string {
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return `stop a volume server from sending heartbeats to the master
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volumeServer.leave -node <volume server host:port> -force
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This command enables gracefully shutting down the volume server.
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The volume server will stop sending heartbeats to the master.
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After draining the traffic for a few seconds, you can safely shut down the volume server.
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This operation is not revocable unless the volume server is restarted.
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`
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}
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func (c *commandVolumeServerLeave) HasTag(CommandTag) bool {
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return false
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}
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func (c *commandVolumeServerLeave) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
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vsLeaveCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
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volumeServer := vsLeaveCommand.String("node", "", "<host>:<port> of the volume server")
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if err = vsLeaveCommand.Parse(args); err != nil {
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return nil
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}
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if err = commandEnv.confirmIsLocked(args); err != nil {
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return
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}
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if *volumeServer == "" {
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return fmt.Errorf("need to specify volume server by -node=<host>:<port>")
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}
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return volumeServerLeave(commandEnv.option.GrpcDialOption, pb.ServerAddress(*volumeServer), writer)
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}
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func volumeServerLeave(grpcDialOption grpc.DialOption, volumeServer pb.ServerAddress, writer io.Writer) (err error) {
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return operation.WithVolumeServerClient(false, volumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
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_, leaveErr := volumeServerClient.VolumeServerLeave(context.Background(), &volume_server_pb.VolumeServerLeaveRequest{})
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if leaveErr != nil {
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fmt.Fprintf(writer, "ask volume server %s to leave: %v\n", volumeServer, leaveErr)
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} else {
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fmt.Fprintf(writer, "stopped heartbeat in volume server %s. After a few seconds to drain traffic, it will be safe to stop the volume server.\n", volumeServer)
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}
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return leaveErr
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})
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}
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