In many environments, including cloud (esp. oracle cloud), instances are isolated by os and platform firewall/network security policies/rules that only allow port 22 (ssh), which means cluster install/join would fail with cryptic errors e.g. #429.
Suggest adding a connectivity check to master port 6443 in k3sup join. Upon timeout, warn users about firewall issues that need to be addressed.
In many environments, including cloud (esp. oracle cloud), instances are isolated by os and platform firewall/network security policies/rules that only allow port 22 (ssh), which means cluster install/join would fail with cryptic errors e.g. #429.
Suggest adding a connectivity check to master port 6443 in
k3sup join. Upon timeout, warn users about firewall issues that need to be addressed.