[SOLVED] [VM] Cloud-init connection loss on Debian

[Drthrax74]

Hello,
After installing Cloud Init on Debian 10, I no longer have internet.

I did the configuration correctly in 192.168.1.40/24 (Class C)

I then tried to delete Cloud-Init on the VM side and the system side but could not reestablish the connection.

I notice the interface is named eth0 while it was named ens18, I am assuming that a process on startup is triggered

agent: 1
boot:
cipassword: $5$eA6pEzNY$JYnCT.Hima6epxb5LMEd8Kp8sAp7meAYSu6sZoImrS2
ciuser: marc
cores: 1
ipconfig0: ip=dhcp
memory: 390
name: SLDEBIAN01.LAN
nameserver: 192.168.1.1
net0: virtio=82:C4:58:1B:8D:99,bridge=vmbr0
numa: 0
ostype: l26
scsi0: NAS:200/vm-200-disk-0.qcow2,size=5G
scsihw: virtio-scsi-pci
searchdomain: LAN
smbios1: uuid=406dd39f-e89d-4558-9c6b-2a5f22cdf754
sockets: 1
sshkeys: ********************************
tablet: 0
vmgenid: ca6b056f-9199-4dc7-bf92-262145fc7d4b

/etc/udev/rules.d/70-persistent-net.rules

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="36:37:39:56:08:bd", NAME="eth0"

 

[spirit]

in your debian, edit

/etc/default/grub

GRUB_CMDLINE_LINUX="net.ifnames=0"

then #update-grub and reboot.

you'll have ethX naming needed for cloud-init

 

[Drthrax74]

Hello,

I did like this:

marc@SLDEBIAN01:$ sudo rm /etc/udev/rules.d/70-persistent-net.rules ;
marc@SLDEBIAN01:$ sudo update-grub ;
marc@SLDEBIAN01:$ sudo reboot ;

Check:

marc@SLDEBIAN01:$ ip add| grep MULTICAST ;
2: ens18: <DIFFUSION, MULTIDIFFUSION, UP, LOWER_UP> mtu 1500 qdisc pfifo_fast état groupe UP par défaut qlen 1000

marc@SLDEBIAN01:$ cat /etc/network/interfaces

auto lo
iface lo inet loopback

auto ens18
allow-hotplug ens18
iface ens18 inet dhcp

marc@SLDEBIAN01:$ sudo ifconfig

ens18: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.40 netmask 255.255.255.0 broadcast 192.168.1.255
ether 82:c4:58:1b:8d:99 txqueuelen 1000 (Ethernet)
RX packets 66018 bytes 13720060 (13.0 MiB)
RX errors 0 dropped 5 overruns 0 frame 0
TX packets 20837 bytes 2040707 (1.9 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0