What can trigger EC2 updates aside from Maintenance Windows

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I am running into something that seems happening without a trigger. I have 111 EC2 instances, a mix of various versions of Windows and Linux. Everyday at about 18:30 GMT a seemingly random combination of servers patch. Nothing that I can find is triggering it. There are 4 maintenance windows, all currently disabled. And they were not for that time anyway.
Is there something else I can look at? Where\What else can trigger patching? It appears that I am missing something. Can anyone here shed any light on what's going on and\or what I'm missing\did wrong?

BigD63
asked 2 years ago215 views
2 Answers
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Go to Patch Manager (it is under Systems Manager) and see if you have any Recurring patching tasks. If yes, then click into each one and see what it's targets are, to see if this is the source of the behavior you are seeing

profile pictureAWS
answered 2 years ago
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Holy cow, there are jobs there and that seems to be the source. I never made these, you even know where they come in at\from?

BigD63
answered 2 years ago

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