add command to list filers

weed/shell/command_cluster_ps.go

@@ -0,0 +1,54 @@
+package shell
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+)
+
+func init() {
+	Commands = append(Commands, &commandClusterPs{})
+}
+
+type commandClusterPs struct {
+}
+
+func (c *commandClusterPs) Name() string {
+	return "cluster.ps"
+}
+
+func (c *commandClusterPs) Help() string {
+	return `check current cluster process status
+
+	cluster.ps
+
+`
+}
+
+func (c *commandClusterPs) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	clusterPsCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	if err = clusterPsCommand.Parse(args); err != nil {
+		return nil
+	}
+
+	err = commandEnv.MasterClient.WithClient(func(client master_pb.SeaweedClient) error {
+		resp, err := client.ListClusterNodes(context.Background(), &master_pb.ListClusterNodesRequest{
+			ClientType: "filer",
+		})
+
+		fmt.Fprintf(writer, "the cluster has %d filers\n", len(resp.ClusterNodes))
+		for _, node := range resp.ClusterNodes {
+			fmt.Fprintf(writer, "  * %s (%v)\n", node.Address, node.Version)
+		}
+		return err
+	})
+	if err != nil {
+		return
+	}
+
+	return nil
+}