We just stood up a new distributed deployment with 3 indexers and a CM. I was able to connect 1 indexer to the CM successfully but when I was trying to connect the other 2 indexers to it, I was getting the error "Could not contact manager. Check that the manager is up, the manager_uri=https://xxxxxxx:8089 and secret are specified correctly.
I know the secret is right and it is the correct uri, firewalld is disabled, I am able to netcat to the host via 8089, indexer GUIDs are unique.
Ncat: Version 7.70 ( https://nmap.org/ncat ) Ncat: Connected to xxxxxx:8089. Ncat: 0 bytes sent, 0 bytes received in 0.02 seconds.