Spring Cloud Tutorial - Netflix Zuul + Eureka Simple Example

Deploy an application usingNetflix Zuul and Eureka.
www.javainuse.com/spring/spri...

[@Abdullahkhan-ks2py]

Extremely nice, concise and progressive tuts to learn Spring cloud and its module. Really helpful. Thanks a lot.

[@nemosourav]

Your videos are extremely easy to follow and right to the point. I have followed your Spring cloud videos and they have played a big part in understanding the Spring cloud concepts. Thank you so much and keep making such videos!

[@JavaInUse]

Thanks for the encouraging comment Sourav.

[@subramanianchenniappan4059]

Thanks, you explained the concept in a simple way. all in 15 minutes

[@sharathnagendran3754]

Awesome tutorial. Exactly what I was looking for.

[@JavaInUse]

Glad could help you Sharath :)

[@mohammadmainuddin5233]

Thank you! Great one!

[@andrewsselvaraj]

Excellent Excellent Excellent .Keep up the good work

[@ravinderreddy661]

Excellent !!!

[@abhijitdascs]

great one!!!

[@azharmobeen]

Thank you so much for sharing this tutorial. it's simple and easy to understand. I just loved it. Thanks

[@JavaInUse]

Welcome Azhar. Glad could help you :)

[@skullwise]

Very well explained... But I don't understand the use of pre, post, route and error ZuulFilters. Can anyone please explain?

[@niduraprageeth1734]

thank u so much

[@vishalm1600]

Hi, First of all your videos are amazing! I have had great help from your channel and website in learning Spring Cloud. One question: What is the benefit of calling producer through zuul in the consumer? Is it best practice to make inter-service service calls through the gateway, since we could keep using the Eureka server to directly get our request to the producer?

[@subramanianchenniappan4059]

good question. I also want to know

[@Crane_FISH]

No Vishal, zuul is for external app 's call to our microsevices call via single entry point.. For within application microsevice to microsevice call u can use ribbon i.e client side load balancer

[@jitendrathakur18190]

It's a nice example, but one thing I have observed when you have created filters you have copied the class name, package then code it somehow slow process. As I have seen you already using eclipse it means you can directly copy the complete code and paste it in the root (src/main/java) directory of project in eclipse it automatically creates the packages and class.

[@ruchirapeiris5267]

Thanks for sharing. A quick question. Why we always take the first instance (ServiceInstance serviceInstance = instances.get(0)). Sounds like we are ignoring all the other instances in a scenario where we have multiple instances of same service.

[@ksk235]

I think you are taking a back step in continuation of your previous videos. If there are multiple Employee Producer instances as you have shown in your previous video with Netflix Ribbon, how does that come into play? Does Zuul use Ribbon in the background? I would really appreciate your answer. Thank you so much

[@hi1983ja]

Thanks for the video this one is really helpful. Could you please help me to understand howto determine whether zuul is redirecting request to right service ?

[@diegoramos27]

I think it needs to check that with Eureka, did you get the answer by now. ?

[@GRajaMca]

Thanks for your awesome videos, but I have a confusion on how to communicate between two microservice either it should go via zuul gateway or using Eureka ?? in your current situation request in coming from outside like web apps to service but if there is a situation my internal service should talk to each other how can I achieve this

[@gautamdevkhanna4255]

Use feign or RestTemplate instead... Zuul primarily used as API Gateway for external consumers interested in your microservices..

[@gauravdas1000]

Very easily explained, liked it. Please guide me to deploy the same in AWS without ECS

[@abhabhardwaj8351]

Thank you for making very informative videos. Could you make some vedio on redhat openshift

[@Crane_FISH]

Please upload Zuul 2.0 video. Thank you..

[@avinashmadireddy]

Can you explain, how to route if there are multiple producer micro service instances? Instead of defining in properties file as static.

[@vinaysumani6045]

Why should external service know the eureka details. it should be just rest call to zuul and zuul in turn with eureka forward the request

[@sHashikumarindrukhia]

on zuulfilter code there are lots of error. why and how do i resolve this

[@bunthaideng2492]

I am still not clear reverse proxy and load balancer

[@brprajwal]

What if zuul proxy goes down? How do you make zuul proxy highly available? How do clients address different zuul proxies?

[@azharmobeen]

You should check Hystrix for this purpose not only Zuul service down for all the services we should use this. Please check this link :dzone.com/articles/hystrix-series-part1-getting-started-with-hystrix

[@shubhi2648]

Hi sir, thanks for awesome video. I have a doubt: I have created one service as oauthserver.. In my zuul, I have used "authenticated" for all the microservices except for zuul service... How will Eureka come into picture here? Like I have doubts as to which flow will be followed for an external request: Flow 1: Request -> zuul -> oauth server (get token) -> zuul -> eureka -> microservice (If we implement this flow, will zuul route all requests to eureka instead of corresponding microservice) Flow 2: Request -> Eureka ->> Zuul -> oauth server (get token) -> zuul -> microservice Pls suggest which is correct flow. Thanks

[@candidfarmer425]

A quick question.... why did we hardwire the baseurl against /producer in a properties. what if the producers got registered to Eureka from different boxes or zones? Shouldn't we tell zuul to use Eureka itself to discover the service...... something like /producer ---> discoveryClient.getInstances('producer-service').get(0).getUri() ? can you please clarify?

[@JavaInUse]

In such a scenario we can use Eureka to get producer module details. The properties file in this case will be something like-zuul: routes: producerID: path: /producer/** stripPrefix: false serviceId: employee-zuul-service Maybe will provide a video of such example later.

[@sparun1607]

I have only one question if we hit the service directly will it redirect to api gateway automatically? if we need to make it to work what should be done?

[@JaikratSinghTariyal]

It wont and we don't route URLs from application to api gateway. Its vice versa.

[@easyappscompany]

good

[@JavaInUse]

thanks

[@yogeshsrivastava3050]

Why you created new properties file bootstrap. Properties

[@subramanianchenniappan4059]

good question

[@TimC0x]

Error in video: property spring.application.name should be in boostrap.properties and not in application.properties

[@TimC0x]

8:15

[@TimC0x]

also why not yml but properties format?

[@TimC0x]

anyways, thank you for videos - they made the clear view on spring cloud for me!

[@gautamdevkhanna4255]

I think you jumbled up a bit by calling one microservice talking to Zuul and then inturn calling internal ones.. you could have shown some external user request.. this would have clarified many doubts .. inter microservices is generally done using restTemplate or feign as recommended. no doubt still video was informative...

[@Crane_FISH]

Yes correct, just assume that call microsevice here is external app only.. that's it. Zuul is for external .. not for internal

[@mushroomhead3619]

There is no Netflix! Only Zuul!