Andreas Happe: virtualization

Using a (host) reverse-proxy together with LXC application servers

The basic idea is to move application servers into LXC containers while keeping the HTTP server part (which is also responsible for hosting static files) on the host system. Normally an incoming request would be handled by an HTTP server on the host as well as by an HTTP server on the virtualized client: 1 browser -> http server(host) -> http server (guest) -> app-server (guest) I’m configuring the host HTTP server to directly communicate with the app worker, thus:

April 25, 2014 in tech linux virtualization

How to convert an KVM image into a LXC container

KVM was an improvement over Xen for me. Still for many use-cases a LXC are a more performance, light-weight alternative – which also seems to be en vougue nowadays. Through switching to LXC I’ve reduced my overall memory usage a bit – the main benefit is, that processes within an LXC container are separated processes within the host system. This should allow the host system to manage memory (think cache, buffers, swap, etc.

April 7, 2014 in tech linux virtualization

How to use virt-install to install new virtual machines within libvirt/kvm

I’ve been using KVM and virt-install to manage virtual machines on one of my servers, this post shows how to use virt-install. According to the package management system I’m having the following packages installed: 1 2 3 4 5 6 7 8 9 [email protected] ~ # dpkg -l | grep virt ii libvirt-bin 1.1.1-0ubuntu8.1 amd64 programs for the libvirt library ii libvirt0 1.1.1-0ubuntu8.1 amd64 library for interfacing with different virtualization systems ii munin-libvirt-plugins 0.

March 22, 2014 in tech linux virtualization

Linux: How to force an application to use a given VPN tunnel

I’ve changed my approach and am now using a simple docker setup to achieve the same result Somehow I have to use VPN services throughout the day: when pen-testing from abroads I really need to login to my company’s network first. Otherwise my provider is kinda grumpy when I’m doing fast non-cloaked scans against large companies. also when pen-testing I like to use some cloaking VPNs to test the client’s detection capabilities if I would ever use bit-torrent I’d really like to make sure that the torrent program can only communicate through a private proxy (as pia).

October 20, 2013 in tech linux virtualization