Add metrics for TCP and TCP+SNI proxy

[InformatiQ]

No description provided.

[magiconair]

It is correct that the TCP proxy does not collect metrics at the moment since most of the metrics I'm collecting only make sense in for HTTP. Which metrics would you like to see?

[InformatiQ]

out of the top of my head i would expect to see

• number of connections
• tx and rx stats per service

[csawyerYumaed]

number of connections and tx & rx would be good.

[magiconair]

I've added the metrics but the naming needs some more work since I'd like to add the protocol to the metrics name. Right now you get:

counter tcp.conn
counter tcp.connfail
counter tcp.noroute
counter tcp_sni.conn
counter tcp_sni.connfail
counter tcp_sni.noroute
counter server._1234._.127_0_0_1_5000.rx
counter server._1234._.127_0_0_1_5000.tx

I've defined rx and tx as follows:

// rx measures the traffic to the upstream server (in <- out)
// tx measures the traffic from the upstream server (out <- in)

Also, in order to support #211 I finally need to address the metrics naming problem ...

Could you please have a look whether that works for you?

[magiconair]

@InformatiQ and @csawyerYumaed are you still interested in this?

[csawyerYumaed]

Hi sorry, I somehow missed this back when. This looks fine for me. We can group by server.1234.* to count total traffic in/out. Thanks!