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replaceVmUserData.go
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replaceVmUserData.go
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package main
import (
"bufio"
"fmt"
"io"
"net"
"github.com/Cloud-Foundations/Dominator/lib/errors"
"github.com/Cloud-Foundations/Dominator/lib/log"
proto "github.com/Cloud-Foundations/Dominator/proto/hypervisor"
)
func replaceVmUserDataSubcommand(args []string, logger log.DebugLogger) error {
if err := replaceVmUserData(args[0], logger); err != nil {
return fmt.Errorf("error replacing VM user data: %s", err)
}
return nil
}
func replaceVmUserData(vmHostname string, logger log.DebugLogger) error {
if vmIP, hypervisor, err := lookupVmAndHypervisor(vmHostname); err != nil {
return err
} else {
return replaceVmUserDataOnHypervisor(hypervisor, vmIP, logger)
}
}
func replaceVmUserDataOnHypervisor(hypervisor string, ipAddr net.IP,
logger log.DebugLogger) error {
if *userDataFile == "" {
return errors.New("no user data file specified")
}
file, size, err := getReader(*userDataFile)
if err != nil {
return err
}
defer file.Close()
request := proto.ReplaceVmUserDataRequest{
IpAddress: ipAddr,
Size: uint64(size),
}
userDataReader := bufio.NewReader(io.LimitReader(file, size))
client, err := dialHypervisor(hypervisor)
if err != nil {
return err
}
defer client.Close()
conn, err := client.Call("Hypervisor.ReplaceVmUserData")
if err != nil {
return err
}
defer conn.Close()
if err := conn.Encode(request); err != nil {
return err
}
logger.Debugln(0, "uploading user data")
if _, err := io.Copy(conn, userDataReader); err != nil {
return err
}
if err := conn.Flush(); err != nil {
return err
}
var response proto.ReplaceVmUserDataResponse
if err := conn.Decode(&response); err != nil {
return err
}
return errors.New(response.Error)
}