Tech

I’ve seen a bunch of posts lately about how to set up Docker swarm monitoring with tools like cAdvisor and node_exporter which advise running them like this: docker service create --mode global -p 9100:9100 ... That will indeed run one container on each swarm node, but it has a subtle problem. When you connect to host:9100, the ingress network routing will connect you to a random instance each connection (for swarm routing values of random). You will indeed get some metrics returned, but they will be for whichever host you happened to be routed to this time. ...

I made a fairly simple post-receive hook setup to automatically update my Puppet master when I push changes to my control repo. I keep the repo in gitolite, so I wanted to use a regular git hook rather than web hook magic (or even magicer Puppet Enterprise Code Manager magic). My control repo itself is based on the puppetlabs control-repo on github. Essentially the idea is that every branch in the repo becomes a Puppet environment on your master, complete with automatically updated modules based on a Puppetfile. The r10k tool takes care of the heavy lifting here, and its documentation explains how it works in some detail. ...

From Ubuntu docs about the Compose key at https://help.ubuntu.com/community/ComposeKey: The compose key sequences used by Gnome are derived from the X compose tables of XFree86 version 4.0 with further modifications to provide a Gnome standard for all locales. They are hard coded into the program in source file gtk+-2.10.7/gtk/gtkimcontextsimple.c Digging into the current Debian gtk+ source verifies this: ` /* This file contains the table of the compose sequences, ...

Like several people I know, I have two AppleID accounts for personal use. I have one that I set up back when an iPod was my only Apple gadget and they first opened the iTunes Store. This has all my (large number of) iTunes purchases associated with it. I also have a MobileMe account that I set up a while later when I first bought a Mac, which I now largely use for the me.com email address associated with it. So far this has worked nicely. I log in to the iTunes account for iTunes and to the MobileMe account for email, sync etc. ...