So, I have been using LXC to host my server services for a period of time, with a view to keeping things portable should I need to change provider. It’s very good in that it’s integrated into the Linux kernel and in Ubuntu at least it’s not too difficult to setup, however there are a number of problems with it.
First and foremost, every time the container operating system upgrades anything to do with init scripts, it won’t boot any more, so you are forced to hold back packages with varying amounts of success. Secondly, there does seem to be some overhead running things in an LXC container, and thirdly it isn’t as portable as it could be i.e. there is no live migration. and you will have to change config files if you move hoster to reflect you new IP address.
As I’m not selling containers as VPS, I only need to run 1 server instance, and therefore don’t really need containerisation at all, enter schroot. Schroot is like chroot without the hassle and with added flexibility, in a nutshell it will mount and start everything correctly for you to the point where you can automate startup and running of services in the chroot, it doesn’t suffer from init script borkage since the init system isn’t used at all, and it’s more portable as networking is irrelevant to a chroot (it simply uses the hosts networking).
Ok so where to start, well if you are already using LXC you can use the directory your container is stored in. I opted to move mine to a sane location before starting, in the interests of convention and easy administration. So, I created a “schroot” directory in the /home directory i.e.
For people who want to use their HSDPA connection from the command line in Ubuntu – Perhaps you have a server you want to use it on, or perhaps you want to do it from the command line for the craic – This is for you.
There are 3 files involved “/etc/ppp/peers/provider”, “/etc/chatscripts/pap” and “/etc/ppp/chap-secrets”.
Today I’m going to write about a couple of major gotchas with LXC. Now these issues are documented in various places but I wanted to put all the relevant information together in one place to make it easier for people.
Before going any further it’s important to note that I created my LXC container with the official Ubuntu template from the latest “stable” LXC release i.e. I downloaded the tarball and put the template in the correct place as Ubuntu 10.04′s LXC package doesn’t contain said template. This helps minimise all sorts of problems especially ones related to the LXC console crashing and the like.
Firstly you will find when running “apt-get upgrade” (if you have Lucid updates enabled in /etc/apt/sources.list) that you get this error on upgrading udev:-
mknod: `/lib/udev/devices/ppp': Operation not permitted
The idea here is to setup DNSMASQ and HAVP to provide DNS, DHCP and content filtering in a Windows 7/Vista/XP client environment on Ubuntu Server Edition. DNSMASQ is a light package which will provide DNS caching and DHCP to a network (amongst other things). HAVP is a proxy server which uses a third party virus scanner (usually ClamAV) to scan internet content for viruses. This assumes that you already have Ubuntu Server Edition installed on a suitable machine and have a working internet connection. In the settings “192.168.1.254″ refers to this machine which is acting as a router/firewall, you could equally set it to the ip of another router on the network. “192.168.1.253″ refers to the ip of a Windows server. First off install DNSMASQ:-