[lxc-users] Using lxc Container on Fedora/Centos

[Denis Müller]

Hi all,

i'm trying to manage lxc container on Fedora/Centos but i have issues on  
networking. My whole idea is to use Centos 6.5 with lxc 1.0.6 like a  
hypervisor with web/mail-server Container on it.I'm doing following Steps:

1. yum install lxc-extras lxc lxc-templates (on this point Ubuntu is a bit  
comfortable, you just have to type apt-get install lxc and you'll get all  
Packages you need like "lxc-templates" etc.)

2.brctl addbr br0 ( using brctl to manage bridges more comfortable as  
editing configs)

3.ifconfig br0 192.168.3.1 netmask 255.255.255.0
4.ifconfig br0 up
-------------------------------------------------------------------------------------------------------------------------------
now ifconfig:

br0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
         inet 10.0.3.1  netmask 255.255.255.0  broadcast 10.0.3.255
         inet6 fe80::3435:eff:fe2f:77f0  prefixlen 64  scopeid 0x20<link>
         ether 00:00:00:00:00:00  txqueuelen 0  (Ethernet)
         RX packets 64  bytes 11068 (10.8 KiB)
         RX errors 0  dropped 0  overruns 0  frame 0
         TX packets 37  bytes 4841 (4.7 KiB)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
         inet 127.0.0.1  netmask 255.0.0.0
         inet6 ::1  prefixlen 128  scopeid 0x10<host>
         loop  txqueuelen 0  (Lokale Schleife)
         RX packets 4  bytes 240 (240.0 B)
         RX errors 0  dropped 0  overruns 0  frame 0
         TX packets 4  bytes 240 (240.0 B)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

p4p1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
         ether 00:21:27:fb:0e:c2  txqueuelen 1000  (Ethernet)
         RX packets 0  bytes 0 (0.0 B)
         RX errors 0  dropped 0  overruns 0  frame 0
         TX packets 0  bytes 0 (0.0 B)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

p5p1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
         inet 192.168.0.6  netmask 255.255.252.0  broadcast 192.168.3.255
         inet6 fe80::8e89:a5ff:fe3f:c263  prefixlen 64  scopeid 0x20<link>
         ether 8c:89:a5:3f:c2:63  txqueuelen 1000  (Ethernet)
         RX packets 19070316  bytes 6158412139 (5.7 GiB)
         RX errors 0  dropped 0  overruns 0  frame 0
         TX packets 1924578  bytes 210429625 (200.6 MiB)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I want that all future containers use br0 as a Bridge to communicate with  
internet.
-------------------------------------------------------------------------------------------------------------------------------

/etc/dnsmasq.conf:

listen-address=10.0.3.1
bind-interfaces
dhcp-range=192.168.3.1,192.168.3.10,12h

Containers schould get their ip's from dhcp on br0
-------------------------------------------------------------------------------------------------------------------------------

/etc/lxc/default.conf:

lxc.network.type = veth
lxc.network.link = br0
lxc.network.flags = up
-----------------------------------------------------------------------------------------------------------------------------

/var/lib/lxc/centos/config

lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.hwaddr = fe:51:96:6e:67:dd
lxc.rootfs = /var/lib/lxc/centos/rootfs

lxc.include = /usr/share/lxc/config/centos.common.conf

lxc.arch = x86_64
lxc.utsname = centos.xxx-media.com

lxc.autodev = 0

-----------------------------------------------------------------------------------------------------------------------------

I'm still not getting IP Address from DHCP. And if i give manually an ip  
like 192.168.3.9 inside of the container "centos" for eth0 i am not able  
to ping 192.168.3.1 or use network. If i try to restart network, it stucks  
on ip.

ifconfig of my container:

eth0      Link encap:Ethernet  Hardware Adresse FE:51:96:6E:67:DD
           inet6 Adresse: fe80::fc51:96ff:fe6e:67dd/64  
Gültigkeitsbereich:Verbindung
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:9 errors:0 dropped:0 overruns:0 frame:0
           TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
           Kollisionen:0 Sendewarteschlangenlänge:1000
           RX bytes:1254 (1.2 KiB)  TX bytes:1010 (1010.0 b)

lo        Link encap:Lokale Schleife
           inet Adresse:127.0.0.1  Maske:255.0.0.0
           inet6 Adresse: ::1/128 Gültigkeitsbereich:Maschine
           UP LOOPBACK RUNNING  MTU:65536  Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           Kollisionen:0 Sendewarteschlangenlänge:0
           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
-----------------------------------------------------------------------------------------------------------------------------

route -n is missing! No Routers here.

It would be greate if somebody could help me. Because on Ubuntu it is no  
Problem, the lxc-deamon do all the Stuff for you, but on Centos no...

Thank you