How to divide the server (with several machines)

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I have the following services to install or deploy:
a gitlab (code management)
a web management system (tomcat) and its database mysql
a jenkins
a svn service (managed documentation)
there may also be a bug management system

the server uses a CVM, so do you want to get a host with a higher configuration, or is it divided into two? How about a machine?
ask for advice, thank you.

Server deployment

Mar.15,2021

2 sets; gitlab requires 4G memory, but does not eat much memory after installation, so you can install Jenkins,svn,bug after basic installation. Another side Web and MySQL, to adjust the configuration is basically enough, 8G memory is a relatively moderate choice, at the extreme you can choose a 16g, cpu2cores bottom.

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