func lockNode(ctxt string, nodeId uuid.UUID, hostname string, operation string) (*lock.AppLock, error) {
//lock the node
locks := make(map[uuid.UUID]string)
if nodeId.IsZero() {
//Generate temporary UUID from hostname for the node
//for locking as the UUID is not available at this point
id, err := uuid.Parse(util.Md5FromString(hostname))
if err != nil {
return nil, fmt.Errorf("Unable to create the UUID for locking for host: %s. error: %v", hostname, err)
}
nodeId = *id
}
locks[nodeId] = fmt.Sprintf("%s : %s", operation, hostname)
appLock := lock.NewAppLock(locks)
if err := GetApp().GetLockManager().AcquireLock(ctxt, *appLock); err != nil {
return nil, err
}
return appLock, nil
}
