[SOLVED] Container network on Proxmox 4 / OVH

[grobs]

Hi,

I recently installed Proxmox 4 on a dedicated OVH server and then created a container like this:

pct create 200 /var/lib/vz/template/cache/debian-8.0-standard_8.4-1_amd64.tar.gz
  -rootfs 25
  -hostname myhost.mydomain.com
  -memory 1024
  -nameserver 213.186.33.99
  -net0 name=eth0,hwaddr=02:00:00:aa:bb:cc,ip=11.11.11.11/32,gw=22.22.22.22,bridge=vmbr0
  -storage local
  -onboot 1
  -ostype debian
  -searchdomain mydomain.com
  -swap 512
  -cpulimit 2
  -cpuunits 1024
  -password

My container is now up but network is unreachable.

• 11.11.11.11 is my container (guest) IP address
  
• 22.22.22.22 is my physical (host) IP address
• 02:00:00:aa:bb:cc is the Virtual Mac Address I generated on the OVH web interface

Physical (host) configuration:
Not modified:

auto lo
iface lo inet loopback

# for Routing
auto vmbr1
iface vmbr1 inet manual
   post-up /etc/pve/kvm-networking.sh
   bridge_ports dummy0
   bridge_stp off
   bridge_fd 0

# vmbr0: Bridging. Make sure to use only MAC adresses that were assigned to you.
auto vmbr0
iface vmbr0 inet static
   address 22.22.22.22
   netmask 255.255.255.0
   network 22.22.22.0
   broadcast 22.22.22.255
   gateway 22.22.22.254
   bridge_ports eth0
   bridge_stp off
   bridge_fd 0

iface vmbr0 inet6 static
   ...

# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
  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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP group default qlen 1000
  link/ether 0c:c4:7a:6d:37:32 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
  link/ether 0c:c4:7a:6d:37:33 brd ff:ff:ff:ff:ff:ff
4: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
  link/ether 36:32:8a:2a:c1:3b brd ff:ff:ff:ff:ff:ff
  inet6 fe80::3432:8aff:fe2a:c13b/64 scope link
  valid_lft forever preferred_lft forever
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
  link/ether 0c:c4:7a:6d:37:32 brd ff:ff:ff:ff:ff:ff
  inet 22.22.22.22/24 brd 22.22.22.255 scope global vmbr0
  valid_lft forever preferred_lft forever
  inet6 2001:40d0:8:2d68::/64 scope global
  valid_lft forever preferred_lft forever
  inet6 fe80::ec3:7aff:fe6d:3732/64 scope link
  valid_lft forever preferred_lft forever
19: veth200i0@if18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
  link/ether be:26:ca:62:60:82 brd ff:ff:ff:ff:ff:ff link-netnsid 0
  inet6 fe80::bc26:caff:fe62:6082/64 scope link
  valid_lft forever preferred_lft forever

Container (guest) configuration:

# cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
   address 11.11.11.11
   netmask 255.255.255.255
   post-up ip route add 22.22.22.22 dev eth0
   post-up ip route add default via 22.22.22.22
   pre-down ip route del default via 22.22.22.22
   pre-down ip route del 22.22.22.22 dev eth0

# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
  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
18: eth0@if19: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
  link/ether 02:00:00:aa:bb:cc brd ff:ff:ff:ff:ff:ff
  inet 11.11.11.11/32 brd 11.11.11.11 scope global eth0
  valid_lft forever preferred_lft forever
  inet6 fe80::ff:fe64:a7ba/64 scope link
  valid_lft forever preferred_lft forever

I followed this OVH guide for network configuration: http://guides.ovh.com/Proxmox

Could you please tell me what's going wrong?

Thanks for reading

 

[tom]

pls check also:

http://pve.proxmox.com/wiki/OVH

 

[dietmar]

Also enable IP forwarding for such setups:

# echo 1 > /proc/sys/net/ipv4/ip_forward

 

[grobs]

Thank you very much tom and dietmar!
I replaced the last byte of my gateway address with .254 and it worked

 

[Alfred Danso]

echo 1 > /proc/sys/net/ipv4/ip_forward

Also enable IP forwarding for such setups:

# echo 1 > /proc/sys/net/ipv4/ip_forward

where would you put this configuration on the node or the container please?