Networking configuration after convert openVZ to LXC

[sakyamuni13]

Pct config 404 on LXC proxmox:

arch: i386
cpulimit: 1
cpuunits: 1024
hostname: gestionbibli.mydomain.fr
memory: 1024
nameserver: 147.94.59.21 147.94.59.22
net0: name=venet0,bridge=vmbr0,hwaddr=6E:7E:49:0E:F6:BD,ip=147.94.59.25/24,type=veth
ostype: debian
rootfs: vmstorage:404/vm-404-disk-0.raw,size=8G
searchdomain: mydomain.fr
swap: 1024

 

[Stoiko Ivanov]

ok - you need to change the net0 line to look like:

net0: name=eth0,bridge=vmbr0,gw=147.94.59.21,hwaddr=6E:7E:49:0E:F6:BD,ip=147.94.59.25/24,type=veth

and your node's '/etc/network/interfaces' should only contain the vmbr0 defnition (and the manual up for the physical port)

I hope this helps!

 

[sakyamuni13]

Ok so i make what you say, here is my network config on LXC:


And what i have now on etc/network/interfaces on this 404 vm:

# Auto generated lo interface
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 147.94.59.25
        netmask 255.255.255.0
        gateway 147.94.59.1

But still no access...

 

[Stoiko Ivanov]

This looks correct

now you need to also adapt you /etc/network/interfaces on the host - and reboot (so that it becomes effective) (alternatively you could also try ifreload if you have ifupdown2 installed)

Please make sure to read and understand the network documentation I linked above before trying to reboot (since you may loose network connectivity

 

[sakyamuni13]

Ok, what you call "on the host" is on my proxmox (posidonie) ?
Cause, here i have :

auto lo
iface lo inet loopback

iface eno1 inet manual

auto vmbr0
iface vmbr0 inet static
        address 147.94.57.102
        netmask 255.255.254.0
        gateway 147.94.56.1
        bridge_ports eno1
        bridge_stp off
        bridge_fd 0

 

[Stoiko Ivanov]

Ok, what you call "on the host" is on my proxmox (posidonie) ?

Yes

the config looks ok - assuming your physical network interface is indeed called eno1 (verify with the output of `ip link`)

also make sure that the network where your host (posidonie) is connected supports a bridged setup (multiple mac-addresses per port )

 

[sakyamuni13]

Ok, yes, here is my ip a:

root@posidonie:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
    link/ether 54:9f:35:20:80:58 brd ff:ff:ff:ff:ff:ff
3: eno2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 54:9f:35:20:80:59 brd ff:ff:ff:ff:ff:ff
4: eno3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 54:9f:35:20:80:5a brd ff:ff:ff:ff:ff:ff
5: eno4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 54:9f:35:20:80:5b brd ff:ff:ff:ff:ff:ff
6: enp4s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:79:88 brd ff:ff:ff:ff:ff:ff
7: enp4s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:79:89 brd ff:ff:ff:ff:ff:ff
8: enp4s0f2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:79:8a brd ff:ff:ff:ff:ff:ff
9: enp4s0f3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:79:8b brd ff:ff:ff:ff:ff:ff
10: enp129s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:2c:94 brd ff:ff:ff:ff:ff:ff
11: enp129s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:2c:95 brd ff:ff:ff:ff:ff:ff
12: enp129s0f2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:2c:96 brd ff:ff:ff:ff:ff:ff
13: enp129s0f3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0a:f7:84:2c:97 brd ff:ff:ff:ff:ff:ff
14: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 54:9f:35:20:80:58 brd ff:ff:ff:ff:ff:ff
    inet 147.94.57.102/23 brd 147.94.57.255 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::569f:35ff:fe20:8058/64 scope link
       valid_lft forever preferred_lft forever
15: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether 36:14:15:5e:92:4b brd ff:ff:ff:ff:ff:ff
28: vmbr0v73: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 54:9f:35:20:80:58 brd ff:ff:ff:ff:ff:ff
29: eno1.73@eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0v73 state UP group default qlen 1000
    link/ether 54:9f:35:20:80:58 brd ff:ff:ff:ff:ff:ff
59: veth404i0@if58: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:52:00:14:53:cb brd ff:ff:ff:ff:ff:ff link-netnsid 0

 

[Stoiko Ivanov]

That looks ok

I just noticed - your host has a netmask of /23 (and a different network, than the container)
is the container network 147.94.57.0/24 also directly configured on the infrastructure?

this you need to check with your provider/network team

 

[sakyamuni13]

Yes, posidonie, my proxmox server is 147.94.57.102/23
My container is 147.94.59.25/24
The old proxmox server where openVZ was working was 147.94.59.5.
This is why my LXC doesn't work ?

 

[Stoiko Ivanov]

Is 147.94.59.25/24 configured in the same network/vlan as 147.94.57.102/23 ?

then it should work - else you need to adapt your configuration to the situation in your network - ask your ISP/Datacenter/Network team

also try pinging your default gateway