I am using unattended-upgrades across multiple servers. I would like package updates to be rolled out gradually, either randomly or to a subset of test/staging machines first. Is there a way to do that for APT on Ubuntu?
An obvious option is to set some machines to update on Monday and the others to update on Wednesday, but that only gives me only weekly updates…
The goal of course is to avoid a Crowdstrike-like situation on my Ubuntu machines.
edit: For example. An updated openssh-server comes out. One fifth of the machines updates that day, another fifth updates the next day, and the rest updates 3 days later.
I am not worried about upgrades so bad that they literally don’t boot. I am worried about all the possible problems that might break my service.
You also roll back package versions. I’m not sure what problems could arise.
I can roll back with APT too, my question is how to do the staggered rollout.
You have to reboot for an image update. Hence, you can update the computers at different times and days.
If the os works always (atomic image based distro), and the docker container work, and both can roll back easily. What else could go wrong?
Don’t overthink it :)
