How to shift certificates from one compute engine to another fresh one?

[t2mkn]

I have a compute engine running at gcloud with all setup done for ssl certificates long ago. I want to change my engine with a different OS version and want a fresh new setup.

How can I take these certificates to new engine? Just copy, or making a fresh new install of certbot there with equal domain names for certificate will bring the certificate to new engine?

Existing: Tornado web server on CentOS 7, certbot 1.0.0
Want to: Tornado web server on CentOS 8 with a fresh new setup.

[9peppe]

@t2mkn

How can I take these certificates to new engine? Just copy, or making a fresh new install of certbot there with equal domain names for certificate will bring the certificate to new engine?

Both will work.

Just be advised that http validation will fail if both instances are on at the same time.