Renaming a k3s node is not a cosmetic change
I renamed four nodes because the old domain annoyed me. The cluster stayed green for weeks while sitting one reboot away from losing every worker.
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tls
Site to site with OpenVPN with TLS and FirewallD on Debian
So I needed to setup a site to site transport between our two datacenters, so our internal network will be able to communicate between the two datacenters easily.