Shulou(Shulou.com)06/01 Report--

How to carry out zuul performance analysis, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

We're talking about zuul.

Service filtering

To implement a custom filter, you need to inherit ZuulFilter, and you need to override the following four methods:

The four have four basic characteristics: filter type, execution order, execution condition and specific operation.

FilterType: returns a string that represents the filter type. Four filter types with different lifecycles are defined in zuul, as follows:

Pre: can be called before the request is routed

Routing: called when routing a request

Post: called after routing and error filters

Error: called when an error occurs while processing the request

FilterOrder: defines the order in which filters are executed by int values

ShouldFilter: returns a boolean type to determine whether the filter is to be executed, so the filter can be turned on and off through this function. In the above example, we return true directly, so the filter always takes effect.

Run: the specific logic of the filter. It should be noted that here we use ctx.setSendZuulResponse (false) to make zuul filter the request without routing it, and then set the error code returned by ctx.setResponseStatusCode (401). Of course, we can also further optimize our return, such as editing the returned body content through ctx.setResponseBody (body).

Finally, summarize why the service gateway is an important part of the micro-service architecture, which is why we have to do it:

It not only realizes the routing function to shield many service details, but also realizes the routing of service level and load balancing.

It realizes the decoupling of interface permission check and micro-service business logic. Through the filter in the service gateway, the content of the request is verified in each life cycle, and the verification originally done in the external service layer is moved forward, which ensures the statelessness of the micro-service and reduces the difficulty of testing the micro-service. let the service itself focus more on the processing of business logic.

With the realization of the circuit breaker, the service gateway will not be blocked because of the failure of specific micro-services, and it can still serve external services.

Performance comparison between Zuul and nginx

Conclusion:

The raw performance of Zuul is very close to that of Nginx. In fact, after the warm-up, my test results were even slightly better (to reiterate the disclaimer-this is not a serious benchmark performance test). Nginx shows more predictable performance (with little change), and sadly we experienced some glitches (2 out of 150000 requests) during the Zuul warm-up, but your microservice should be fault-tolerant, right? ).

Zuul handles Cookie and redirection

After reading the above, have you mastered the method of how to analyze the performance of zuul? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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