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I can't comment on capacity issue in general but I'd note that the m1 instance types are quite old - we refer to them as "previous generation" instances. They are based on older hardware (think the underlying CPU and motherboards). And as Werner Vogels (CTO of Amazon) says "Everything fails all the time". So if hardware fails (as it appears to have done in your case) it may not be able to be replaced. As you say, more retirements may happen in the future - and this is definitely more likely as the hardware ages.
I'd strongly recommend that you move to more modern instance type. Note that you may need to update the drivers that are being used. The m1 instances have been around for more than a decade so it's definitely time for an upgrade.
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- 質問済み 6年前
Yes, I have been wanting to rebuild all of our instances starting from more modern AMIs that can be run on newer instance types. I just can't find the hours to do it. One aspect that limits what instance types that can be selected is that many of these older instances are 32-bit linux, which I guess was decided at the time on the assumption of lower memory usage overhead.
You might also try another AZ within us-east-1; there may be additional capacity there. But for longevity I definitely recommend "finding the hours"; those instance types have been superseded many times now.