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Author: Marc MERLIN

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Slide 1 Google Servers and Linux, the early days But, what about updates? Slide 4 Slide 5 File level syncing, really? Wait, all your servers are the same? So how did you do big OS upgrades on the root partition? Ok, so how do you upgrade base packages? How about package pre/post installs? So how did that strategy of patching Red Hat 7.1 work out? So, what new distribution? SysV vs Debian Insserv vs Upstart vs Systemd: SysV SysV vs Debian Insserv vs Upstart vs Systemd: Upstart SysV vs Debian Insserv vs Upstart vs Systemd: Systemd SysV vs Debian Insserv vs Upstart vs Systemd: Insserv ProdNG, tell us more... Ok, we have a new image, how do we push it? Ok, we have a new image, how do we push it? (2) Distros are hard! Mmmh, shopping didn't make the problem go away, what now? Turning the scary big jump into many smaller safer jumps Package conversions from deb to rpm Turning Red Hat 7.1 into debian testing: cruft removal Turning Red Hat 7.1 into debian testing: one bit at a time Sometimes it's the little things that bite you Slide 27 Switching from an image snapshot to one built from scratch Slide 29 Getting closer to the merge: converting rpms to debs What's left? Go on vacation! Well, things never work out like you hoped... Ok, so how did the switch really go? Misc bits: dual package system support Slide 36 Slide 37 Slide 38 And finally: Profit! Slide 40 Slide 41 Slide 42 Slide 43 ProdNG package generation Slide 45 ProdNG image generation. And which linux kernel did you run, surely not 2.4.2? File tracking Testing software before doing an update image. Debugging boots and reboots? Turning Red Hat 7.1 into debian testing: coreutils Turning Red Hat 7.1 into debian testing: other big chunks Slide 53 How did old image reviews work? How does the new image review work?