As part of my home IPv6 project, I encountered the dreaded “Technical Debt”, which led to a “fun” recursive process to get one of my home systems upgraded. Hilarity ensued.
The entire saga is laid out in detail below, but to cut to the chase, I had to completely switch gears on my home router selection, do multiple OS upgrades, fix all kinds of configuration files (format changes), and un-make some assumptions about what I needed to do based on old/outdated/broken information.
So, what did I learn?
- Don’t let technical debt pile up – the whole OS upgrade thing took longer than it should have because the system was so old. I also had big changes in some config files that would have been easier to take as a set of smaller upgrades.
- “The net of a million lies” is sometimes lists as facts things that are at best unconfirmed rumor (Mac’s don’t do auto-config, NEED DHCP6.) or old info.
- The Ubuntu upgrade process is incredibly more robust than it used to be. “do-release-upgrade” actually works now!
- Be flexible – be prepared to switch plans based on new information.
- Maintain your sense of humor.
My IPv6 install journey looks like a recursive program, what with all the false starts, newly-discovered dependencies, etc.
NOTE: WordPress has completely broken nested lists, so you’re getting the PRE-formatted version
start IPv6 home project set up IPv6 tunnel with Hurricane Electric install IPv6 tunnel via he.net on home Linux system - all is OK, but I want something I don't really have to maintain. I also need a more user friendly solution that we can give to our employees, without them having to learn a lot about networking. Do some research, talk to some IPv6 networking people, etc. Discover the reason that my home MacBook Pro won't connect is that my (mostly) current versions of Mac OS X (10.6.8) "won't handle IPv6 auto configuration, you need DHCP6." (More on this later) Buy and install new home router to replace 8 year old WRT54G, something that will also provide a DHCP6 server select, buy install D-Link DIR-825 buy DIR-825 from Amazon install DIR-825 - no IPv6?!? WTF?!? Amazon shipped 3 year old "A" hardware rev - no IPv6 support possible! read more reviews ("drops wireless 1-10 times per day") return DIR-825 select, buy, install Apple Airport Extreme buy from Apple store install Airport Extreme IPv6 happiness!! set up tunnel to Hurricane Electric ping6 and traceroute6 from home Linus server "just work" Discover that unlike DIR-825, Airport Extreme doesn't include DHCP6 server decide to install DHCP6 on home server (Ubuntu Karmic Koala 9.10) Karmic Koala has EOL'ed (when did that happen?) Might as well upgrade home server Hmmm, no "supported" way to upgrade from 9.10, eg "do-release-upgrade" is "not supported" spend hours searching Google, badly written blogs, dozens of people asking the same question" decide to go for it run full backups (I'm willing to take a risk, I'm not stupid) "sudo do-release-upgrade" eat Thankgiving dinner go to party finish upgrade Hmmm, everything us fine except SO's email - I broke dovecot?!? Frack! fix dovecot ready to install DHCP which version? much Googling - leads me to ISC, as I had originally wanted to do install latest DHCP server for Ubuntu - dhcp3-server configure for IPv6 IPv6?!?! Where is it? IPv6 not supported until DHCPv4? version *4*? Oh, DHCP v4 not supported until Ubuntu 11.04 Natty Narwhal - What the hell am I running? Ubuntu 10.04.3 LTS Lucid Lynx??? upgrade from 10.04.03 to 11.04 Natty Narwhal first upgrade to 10.10 Maverick Meerkat things for libc upgrade grub-pc install info bind db.root - take new file dovecot.conf - THREE WAY MERGE - GOOD LUCK WITH THAT! release-upgrades file - take new file apache2.conf, available sites, ssl.conf - take new files (CHECK GALLERY FAILURE) DID GALLEREY2 FAILURE KILL THE UPGRADE? - YES IT DID restart upgrade (45 mins later...) postfix/post-install, postfix-files - take new file dovecot.conf - AGAIN? - keep local file (hopefully merged) apache2 fails to start (gallery2) gallery2 upgrade fails, but this time I can submit a bug report and.... it restarted the upgrade AGAIN? ran into the dreaded "blank screen on reboot" Much Googling ensures - need i915.modeset=0 in grub.cfg Hooray! On 11.04 Natty Narwhal - still need to fix Apache2 * and Gallery2... Wait, what?!? Aha, the restart of the upgrade jumped to 11.04, bypassing the finish of 10.10! Fooled you do-release-upgrade!! HAHA! gallery2 is still broken dovecot is broken (again) decide I might as well go all the way to 11.10 Oneric Ocelot (and then fix Apache and Gallery2) accidentally find the blog post that shows how to turn on acceptance of IPv6 router advertisements on MacOS sysctl -w net.inet6.ip6.accept_rtadv=1 Mac is online with IPv6, SSH works, even! I don't need no stinkin' DHCPv6 (but I will, more later) DONE - IPv6 (minimally) running at home. Clients can access ipv6.google.com, www.kame.net etc.
What a rathole! But this is sometimes the nature of system administration. Shifting requirements, incorrect documentation, need to build the tool to build the tool to do the work.