parameters of starting cloud init

[magnate]

firstly, when I use kylin os ironic qcow2 image, the os takes long time to start with the following parameters:
 /etc/dhcp/dhclient.conf dhclient
  tiemout=30s
 /lib/systemd/system/networking.service
  TimeoutStartSec=10 min
I use systemd-analyze blame to analyze the consuming time of different services,and find the networking.service takes too much time。so,I try the next way。

sencondly, when I use kylin os ironic qcow2 image, but the os fails to start cloud init to fetch metadata with the following parameters:
 /etc/dhcp/dhclient.conf dhclient
  tiemout=3s
 /lib/systemd/system/networking.service
  TimeoutStartSec=3min
it

finally , after I have tried serval times , the os succeeds to start cloud init in reasonable time with the following parameters:
 /etc/dhcp/dhclient.conf dhclient
  tiemout=10s
 /lib/systemd/system/networking.service
  TimeoutStartSec=5min

In a word, I suggest that different timeout of dhclient or networking.service in different os merits attention.