wmccarley commented on a change in pull request #12355:
URL: https://github.com/apache/pulsar/pull/12355#discussion_r747783713



##########
File path: 
pulsar-broker-common/src/main/java/org/apache/pulsar/broker/authentication/metrics/AuthenticationMetrics.java
##########
@@ -32,6 +32,36 @@
             .labelNames("provider_name", "auth_method", "reason")
             .register();
 
+    private static final Counter clientCertSelfSignedMetrics = Counter.build()
+            .name("pulsar_authentication_tls_cert_self_signed_count")
+            .help("Pulsar client authenticating with a TLS cert that is 
self-signed")
+            .register();
+
+    private static final Counter clientCertSmallRsaKeySizeMetrics = 
Counter.build()

Review comment:
       Yes, I changed the metric to clientCertInvalidKeySizeMetrics. However, I 
added an 'algorithm' label to the metric to differentiate between 'rsa' and 
other types of key pairs since suggested key sizes differ greatly between RSA 
and ECC.
   
   FYI based on research for [Issue 
11431](https://github.com/apache/pulsar/issues/11431) it looks like the code 
for loading certs sort of forces users into using RSA key pairs. But it may be 
possible to change that in the future, also may be possible to load ECC key 
pair using an input stream (not sure)




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