Docker – Running LXC and Docker on the same host

dockerlxc

I'm running a private server for a some time now and back when I set it up, I used LXC to separate the different services from each other.

About a month ago I've started to use docker (for work as well as privately) and from now on I'd like to use it for new services (and slowly migrate the old ones to it).

So long story short: Is it possible to run both LXC and Docker on the same host for as long as it takes me to migrate one service after the other?

The server is running Debian Jessie 64bit.

Best Answer

There's nothing that prevents this since docker libcontainer is basically a superset of LXC. Simply make sure IP ranges don't overlap between the two (or more) bridges.

Related Solutions

LXC – How to Access VM Outside the Host on Debian

Your host is virtualized with VMware, then it is plugged to the virtual switch which does not expect any more mac-addresses to be shown than those of VMware virtualized servers (so not lxc inside the VMware guest). So this is definitely a layer 2 issue: VMWare (at least VSwitch) received paquets with a mac-address different than the host mac-address and drop them. So there would be no way for the guest to reach outside its host, as it should go through the Vswitch to do that.

A workaround is to enabled different mac-addresses on the Vswitch. It is performed by editing settings on the Vswitch (on the VMware host, configuration, networking, select the vswitch your lxc-host is connected to, properties, Edit, security, MAC address changes -> Accept).

Linux – docker/lxc bridged networking

the pipework can help you.

Connect a container to a local physical interface

Let's pretend that you want to run two Hipache instances, listening on real interfaces eth2 and eth3, using specific (public) IP addresses. Easy!

pipework eth2 $(docker run -d hipache /usr/sbin/hipache) 50.19.169.157
pipework eth3 $(docker run -d hipache /usr/sbin/hipache) 107.22.140.5

Note that this will use macvlan subinterfaces, so you can actually put multiple containers on the same physical interface.

I think this is what you need.

Best Answer

Related Solutions

LXC – How to Access VM Outside the Host on Debian

Linux – docker/lxc bridged networking

Related Topic