bad practice on creating the tls credentials about grpc-gateway-example HOT 2 OPEN

I was trying to run this example without changing anything but I am getting this error -
http: TLS handshake error from [::1]:53217: remote error: tls: bad certificate INFO: 2018/10/15 13:16:40 pickfirstBalancer: HandleSubConnStateChange: 0xc000158060, TRANSIENT_FAILURE WARNING: 2018/10/15 13:16:40 grpc: addrConn.createTransport failed to connect to {localhost:10000 0 <nil>}. Err :connection error: desc = "transport: authentication handshake failed: x509: Common Name is not a valid hostname: localhost:10000". Reconnecting...

Can anyone help me understanding the problem here?

from grpc-gateway-example.

I had to use the following commands from the certs/Makefile to generate my own Key and Cert values:

openssl genrsa -out server.key 2048
openssl req -new -x509 -key server.key -out server.pem -days 3650

I also used a different port than 10000, so when generating the above certificate, I had to use localhost:8020 as the Common Name:

Common Name (eg, fully qualified host name) []:localhost:8020

When using curl to hit the http endpoint, I had to pass -k and when using grpcurl I had to pass -insecure

from grpc-gateway-example.