[lxc-users] Networking in Ubuntu with 2 ip failover in LXC

Wed Aug 13 08:28:36 UTC 2014

Hey,

what do u mean standard configuration ?

2014-08-13 9:58 GMT+02:00 Tamas Papp <tompos at martos.bme.hu>:

>
> On 08/13/2014 09:47 AM, bryn1u85 . wrote:
>
> Hey everyone,
>
>  I've been trying to configure Ubuntu LXC with 2 ip failover from OVH but
> i failed :(
> I've been reading many howto's and still nothing. I have found on this
> list same cool tutorial which has written by Olivier. There is a link:
> https://lists.linuxcontainers.org/pipermail/lxc-users/2011-May/001980.html
>
>  I don't know why i still can't get access to internet from LXC.
>
>  My host ip: 94.23.237.216
> My ip fail over ip 1: 91.121.239.228
>
>  I'll focus on one failover ip.
> I did as Olivier has subscribed.
>
>  Host:
> root at ns321124:~# cat /etc/network/interface
> # The loopback network interface
> auto lo
> iface lo inet loopback
> auto eth0
>         iface eth0 inet static
>
>  auto br0
>         iface br0 inet static
>         bridge_ports eth0
>         bridge_stp off
>         bridge_maxwait 0
>         bridge_fd 0
>         address 94.23.237.216
>         netmask 255.255.255.0
>         network 94.23.237.0
>         broadcast 94.23.237.255
>         gateway 94.23.237.254
>
> post-up /sbin/ifconfig br0:0 91.121.239.228 netmask 255.255.255.255
> broadcast 91.121.239.228
> post-down /sbin/ifconfig br0:0 down
>
>
> Use either post-up and /sbin/ip or 'iface br0:0 inet static.....'.
>
>
>   root at ns321124:~# cat /var/lib/lxc/Oksymoron/config
> # Template used to create this container:
> /usr/share/lxc/templates/lxc-ubuntu
>  # Parameters passed to the template:
> # For additional config options, please look at lxc.container.conf(5)
>
>  # Common configuration
> lxc.include = /usr/share/lxc/config/ubuntu.common.conf
>
>  # Container specific configuration
> lxc.rootfs = /var/lib/lxc/Oksymoron/rootfs
> lxc.mount = /var/lib/lxc/Oksymoron/fstab
> lxc.utsname = Oksymoron
> lxc.arch = amd64
>
>  # Network configuration
> lxc.network.type = veth
> lxc.network.flags = up
> lxc.network.link = br0
> lxc.network.name = eth0
> lxc.network.ipv4 = 91.121.239.228
>
>
> Use this IP either here or on the bridge iface, but not at both places.
>
>
>  root at ns321124:~# cat /var/lib/lxc/Oksymoron/rootfs/etc/network/interfaces
>  # The loopback network interface
> auto lo
> iface lo inet loopback
>
>  auto eth0
> iface eth0 inet static
>         adress 91.121.239.228
>         netmask 255.255.255.255
>         broadcast 91.121.239.228
>
>
> Define your network either in container:/etc/network/interfaces or in lxc
> config file, but not at both places.
>
>
>
>          post-up route add 94.23.237.254 dev eth0
>         post-up route add default gw 94.23.237.254
>         post-down route del 94.23.237.254 dev eth0
>         post-down route del default gw 94.23.237.254
>
>
> Why not the standard 'gateway .....' configuration?
>
>
>
>  For sure i did reboot and lunch lxc.
>
>  Checking ifconfig in LXC called Oksymoron
>
>  root at Oksymoron:/home/ubuntu# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:16:3e:3e:35:9e
>           inet addr:91.121.239.228  Bcast:255.255.255.255  Mask:0.0.0.0
>           inet6 addr: fe80::216:3eff:fe3e:359e/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:109 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:9448 (9.4 KB)  TX bytes:648 (648.0 B)
>
>  lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:65536  Metric:1
>           RX packets:16 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1248 (1.2 KB)  TX bytes:1248 (1.2 KB)
>
>  Now try update.
>  root at Oksymoron:/home/ubuntu# apt-get update
> Err http://archive.ubuntu.com trusty InRelease
>
>  Err http://archive.ubuntu.com trusty-updates InRelease
>
>  Err http://security.ubuntu.com trusty-security InRelease
>
>  Err http://security.ubuntu.com trusty-security Release.gpg
>   Could not resolve 'security.ubuntu.com'
> Err http://archive.ubuntu.com trusty Release.gpg
>   Could not resolve 'archive.ubuntu.com'
> Err http://archive.ubuntu.com trusty-updates Release.gpg
>   Could not resolve 'archive.ubuntu.com'
> Reading package lists... Done
> W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/InRelease
>
>  W: Failed to fetch
> http://archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease
>
>  W: Failed to fetch
> http://security.ubuntu.com/ubuntu/dists/trusty-security/InRelease
>
>  W: Failed to fetch
> http://archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg  Could not
> resolve 'archive.ubuntu.com'
>
>  W: Failed to fetch
> http://archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg  Could
> not resolve 'archive.ubuntu.com'
>
>  W: Failed to fetch
> http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg
>  Could not resolve 'security.ubuntu.com'
>
>
> This is a dns resolving issue.
>
> t
>
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