WSO2 ESB群集体系结构配置

Question

i have a question about an architectural solution feasibility using WSO2. This is my scenario: I have a Web Service REST exposing some functionalities I have the WSO2 ESB I have a client layer (Liferay)

the architecture i want to develop is the one showed in the first image: http://s11.postimg.org/gu6b6k3zn/Immagine.png

1) Liferay clients send request to avail one functionality 2) WSO2 ESB (clustered) get the client request... and (as a proxy) redirects it to che tomcat server by using load balancing mechanism 3) Web service on tomcat receives the request and answers to it

Studying the WSO2 documentation i saw the configuration showed in the img 2 dealing with esb clustering and load balancing http://s17.postimg.org/tuy885gzz/Immagine2.png As i can see, in this case the Tomcat Application Server(inside WSO2 AS) is embedded inside the WSO2 ESB, so i have to deploy my REST WS into the WSO2 esb, and then clustering it. I want to ask if the second solution is the only permitted or if i can obtain my first architectural solution in which the tomcat instances are decoupled from the ESB instances on a third (physically separated) layer.

Answer 1

In image 2, ( http://s17.postimg.org/tuy885gzz/Immagine2.png ), it is shown a Fail over scenario, where when the Primary ESB node goes down, the requests will be routed to backup node 2.

Even if you want to deploy something like in image 2, you can have the WSO2 AS layer sitting behind the ESB server layer. There you can deploy your REST WS. The REST WS can be fronted by a proxy in your ESB. And the proxy can be accessed by your life ray client.