forked from Cloud-Foundations/Dominator
/
scanVmRoot.go
57 lines (52 loc) · 1.36 KB
/
scanVmRoot.go
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package main
import (
"bufio"
"encoding/gob"
"fmt"
"net"
hyperclient "github.com/Cloud-Foundations/Dominator/hypervisor/client"
"github.com/Cloud-Foundations/Dominator/lib/fsutil"
"github.com/Cloud-Foundations/Dominator/lib/log"
_ "github.com/Cloud-Foundations/Dominator/proto/sub"
)
func scanVmRootSubcommand(args []string, logger log.DebugLogger) error {
if err := scanVmRoot(args[0], logger); err != nil {
return fmt.Errorf("error scanning VM root: %s", err)
}
return nil
}
func scanVmRoot(vmHostname string, logger log.DebugLogger) error {
if vmIP, hypervisor, err := lookupVmAndHypervisor(vmHostname); err != nil {
return err
} else {
return scanVmRootOnHypervisor(hypervisor, vmIP, logger)
}
}
func scanVmRootOnHypervisor(hypervisor string, ipAddr net.IP,
logger log.DebugLogger) error {
if *scanFilename == "" {
return fmt.Errorf("no scanFilename specified")
}
client, err := dialHypervisor(hypervisor)
if err != nil {
return err
}
defer client.Close()
fs, err := hyperclient.ScanVmRoot(client, ipAddr, nil)
if err != nil {
return err
}
file, err := fsutil.CreateRenamingWriter(*scanFilename,
fsutil.PublicFilePerms)
if err != nil {
return err
}
defer file.Close()
writer := bufio.NewWriter(file)
defer writer.Flush()
if err := gob.NewEncoder(writer).Encode(fs); err != nil {
file.Abort()
return err
}
return writer.Flush()
}