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scenarios of entire app in a cluster unavailable



Trying to understand on which scenarios all the instances of an application running from cluster unavailable? 

 

OS upgrade failure??

Openshift upgrade bugs/failures/downtime?

Router failures ??

Keepalive containers failed??

Floating IP shared by keepalive container had issues??

VXLAN bug or upgrade caused entire cluster network failure?

Human config error ( what those???)

 

Is above list accurate? Can we think off any other possible scanarios where whole application will be down in cluster duet to platform issues?

 

-- 

Srinivas Kotaru


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