Affects Version/s: None
Fix Version/s: None
On line 409 of proxysql_node_monitor we are using hyphen to concat host and port of a server.
Acording to RFC1034, hyphen is a valid dns character:
The labels must follow the rules for ARPANET host names. They must
start with a letter, end with a letter or digit, and have as interior
characters only letters, digits, and hyphen. There are also some
restrictions on the length. Labels must be 63 characters or less.
For example, if my hostname is marcelo-altmann.percona.com on port 3306 that particular line will parse marcelo as host and altmann as the port, consecutively it won't be able to connect to my server.