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

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"net"
     6  
     7  	"github.com/Cloud-Foundations/Dominator/lib/errors"
     8  	"github.com/Cloud-Foundations/Dominator/lib/log"
     9  	proto "github.com/Cloud-Foundations/Dominator/proto/hypervisor"
    10  )
    11  
    12  func startVmSubcommand(args []string, logger log.DebugLogger) error {
    13  	if err := startVm(args[0], logger); err != nil {
    14  		return fmt.Errorf("Error starting VM: %s", err)
    15  	}
    16  	return nil
    17  }
    18  
    19  func startVm(vmHostname string, logger log.DebugLogger) error {
    20  	if vmIP, hypervisor, err := lookupVmAndHypervisor(vmHostname); err != nil {
    21  		return err
    22  	} else {
    23  		return startVmOnHypervisor(hypervisor, vmIP, logger)
    24  	}
    25  }
    26  
    27  func startVmOnHypervisor(hypervisor string, ipAddr net.IP,
    28  	logger log.DebugLogger) error {
    29  	request := proto.StartVmRequest{
    30  		DhcpTimeout: *dhcpTimeout,
    31  		IpAddress:   ipAddr,
    32  	}
    33  	client, err := dialHypervisor(hypervisor)
    34  	if err != nil {
    35  		return err
    36  	}
    37  	defer client.Close()
    38  	var reply proto.StartVmResponse
    39  	err = client.RequestReply("Hypervisor.StartVm", request, &reply)
    40  	if err != nil {
    41  		return err
    42  	}
    43  	if err := errors.New(reply.Error); err != nil {
    44  		return err
    45  	}
    46  	if reply.DhcpTimedOut {
    47  		return errors.New("DHCP ACK timed out")
    48  	}
    49  	return maybeWatchVm(client, hypervisor, ipAddr, logger)
    50  }