github.com/cloud-foundations/dominator@v0.0.0-20221004181915-6e4fee580046/cmd/vm-control/getVmVolume.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"net"
     6  
     7  	"github.com/Cloud-Foundations/Dominator/lib/log"
     8  )
     9  
    10  func getVmVolumeSubcommand(args []string, logger log.DebugLogger) error {
    11  	if err := getVmVolume(args[0], logger); err != nil {
    12  		return fmt.Errorf("Error getting VM volume: %s", err)
    13  	}
    14  	return nil
    15  }
    16  
    17  func getVmVolume(vmHostname string, logger log.DebugLogger) error {
    18  	if vmIP, hypervisor, err := lookupVmAndHypervisor(vmHostname); err != nil {
    19  		return err
    20  	} else {
    21  		return getVmVolumeOnHypervisor(hypervisor, vmIP, logger)
    22  	}
    23  }
    24  
    25  func getVmVolumeOnHypervisor(hypervisor string, ipAddr net.IP,
    26  	logger log.DebugLogger) error {
    27  	client, err := dialHypervisor(hypervisor)
    28  	if err != nil {
    29  		return err
    30  	}
    31  	defer client.Close()
    32  	vmInfo, err := getVmInfoClient(client, ipAddr)
    33  	if err != nil {
    34  		return err
    35  	}
    36  	if *volumeIndex >= uint(len(vmInfo.Volumes)) {
    37  		return fmt.Errorf("volumeIndex too large")
    38  	}
    39  	return copyVolumeToVmSaver(&directorySaver{filename: *volumeFilename},
    40  		client, ipAddr, *volumeIndex, vmInfo.Volumes[*volumeIndex].Size, logger)
    41  }