Question

I am using Jenkins for CI,
I’ve heard that I should have a dedicated server and slave for running Jenkins and building tasks, respectively –
is this true?

I can understand this as the server may not be powerful enough to handle the server itself and running build tasks,
but is there any defined technical reason for this?

Answer 1

Best practice is to have a separate machine for Jenkins-Server,
and not to use it for builds at all.

This has nothing to do with CPU-power or memory-resources –

• A build-machine should have a predefined configuration,
  and Jenkins should not be part of it.
  (Jenkins requirements may even conflict with those of the build-machine)

• You should be able to boot / clone / upgrade / restore / trash the build-machine
  without any impact on Jenkins.

Of course you can settle for a single machine, if your resources are limited,
but if you are serious about build-automation – Jenkins should have its own server.