Posts Tagged ‘Ubuntu’

Back in March I wrote about Using Overlay file system with Docker on Ubuntu – those instructions applied to Ubuntu before the switch to systemd e.g. 14.04 and earlier. The move to systemd means that changes to /etc/default/docker don’t have any effect any more. To get systemd to dance along to our tune needs a file like […]

Apache 2.4 changes things a lot – particularly around authentication and authorisation. I’m not the first to run into this issue, but I didn’t find a single straight answer online. So here goes (as root): If you want mpm-worker then do this instead:

TL;DR Apple and Google have both launched laptops in the past few days that are both amazing and seriously flawed. If only somebody could make a machine that has the best of both worlds. MacBook The leaks were pretty much spot on, so in the end the new MacBook brought few surprises. I really want […]

Last week Jérôme Petazzoni did an excellent (abbreviated) version of his ‘Deep dive into Docker storage drivers‘ at the London Docker Meetup. If I wasn’t convinced enough by that, Jessie Frazelle hammered home the same point in her QCon Presentation – AUFS is where it used to be at, and the new king is Overlay. I set about […]

I wrote a few days ago about my first failed attempt to do this. After some perseverance, and with some lessons learned along the way I’m pleased to say that I now have it working. Given that VXLAN (at least in the Linux kernel implementation) needs multicast I’m still not sure that this is a […]

This seemed like a good idea, as VXLAN has been in the Linux kernel since 3.7. TL;DR – this doesn’t work as I’d hoped. The two major issues being: VXLAN needs a multicast enabled network, which rules out most public clouds. Instability – I’ve managed to provoke multiple kernel panics on stock Ubuntu 14.04. Background […]

TL;DR Banking CIOs may know about Ubuntu, and be vaguely aware of Canonical, but I’d be surprised if many could explain the difference in commerials versus Red Hat. Meanwhile engineering teams are content to stick with what they have in a combination of clinging to the past and seeking some mythical homogeneity. OpenStack might give […]

I had some fun last year putting CohesiveFT’s VNS3 cloud networking solution onto Raspberry Pi. It gave us something to demo on at trade shows, and we could also give away Pis as part of promotions. The Pis were like geek catnip. I’ll be using Pis again for Cloud Expo Europe later this month, but […]

When trying to install node.js into the default official Ubuntu image on Docker the other day I hit a dependency issue. Node.js needs rlwrap[1], and rlwrap is in the universe repository, which it turns out isn’t part of /etc/apt/sources.list for the 12.04 image: deb precise main Things worked using the ubuntu:quantal (== ununtu:12.10) image […]

I first came across the BeagleBone when Roger Monk presented at OSHUG #18 in April 2012. It was easy at the time to write it off  as too expensive and too underpowered – the Raspberry Pi was finally shipping and the lucky first 2000 already had their $35 computers whilst the rest of us waited for […]