[Observium] Updating observium system via yum update

Hello,

it's been a while I was upgrading the Observium dependencies. Currently we're suing OLD Centos version: CentOS Linux release 7.3.1611 (Core)

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What do you think, is it safe to update system via yum update? It would upgrade Centos 7.3 to 7.x and should upgrade Python, Maria DB (from 5.5.56 to 5.5.68) ant other Observium dependencies.

After this base update, i would try to manually update MariaDB to 10.x and Python, if yum update will be insufficient.

My concern is to not corrupt the system. Could you give some recommendations or i'm too careful and everything should be fine with yum update. ?

Thank you:)