Zuul2 Connection Pool Settings

[rajc28]

Hi Team , I am having hard time understanding the below connection settings and how they are inter-related. Can someone provide more details on it.

Ribbon Client Config Property
<originName>.ribbon.MaxConnectionsPerHost 

Zuul Properties
<originName>.netty.client.maxRequestsPerConnection
<originName>.netty.client.perServerWaterline 

And In Zuul2 documentation I see this point Zuul does not use Ribbon for making outgoing connections and instead uses its own connection pool, using a Netty client. Does this mean the ribbon property originName
.ribbon.MaxConnectionsPerHost is not used by zuul ?

We have a scenario where we are using same origin host for multiple services where we are observing issues between zuul and origin, what is the best approach and better connection pool settings.

Example:
originName1 goes to origin host1
originName2 goes to origin host1
'
'
originNameN goes to origin host1

At present we are using below connection pool settings

<originName>.ribbon.MaxConnectionsPerHost=-1

<originName>.netty.client.maxRequestsPerConnection = 10000
<originName>.netty.client.perServerWaterline = -1

And do we need to tweak any other connection property for better results ?

[artgon]

Zuul will respect the Ribbon properties to bootstrap a connection but it doesn't use the client itself. What kind of issues are you running into?

[rajc28]

We are getting lot of 504's and 502's during high traffic which is 10k req/sec.

And also I see a point **Zuul creates a connection pool per host, per event loop ** , does the host in this context mean origin host or zuul host ?

[artgon]

"Host" there refers to the origin server. See benchmarking section for sample config to run high RPS tests.