Fix #1304: fix the saga example to use default ports

[nicolaferraro]

Fix #1304

I've changed the saga example to use default ports and unified kube and oc configuration. I've managed to run it with this config.

cc: @sobkowiak

Release Note

NONE

[sobkowiak]

@nicolaferraro great!!! I'll check it in the evening

[sobkowiak]

I have following error in the saga integration

[1] 2020-03-02 22:33:41.629 INFO  [default-workqueue-2] route1 - Executing saga #1                                                                                                                                                                                              
[1] 2020-03-02 22:33:41.671 ERROR [XNIO-1 I/O-1] DefaultErrorHandler - Failed delivery for (MessageId: ID-saga-59465cb6c5-vc7tp-1583188421428-0-2 on ExchangeId: ID-saga-59465cb6c5-vc7tp-1583188421428-0-1). Exhausted after delivery attempt: 1 caught: org.apache.camel.http.
common.HttpOperationFailedException: HTTP operation failed invoking http://train/api/train/buy/seat with statusCode: 404                                                                                                                                                        
[1]                                                                                                                                                                                                                                                                             
[1] Message History                                                 
[1] ---------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                     
[1] RouteId              ProcessorId          Processor                                                                        Elapsed (ms)                                                                                                                                     
[1] [route1            ] [route1            ] [from[timer://clock?period=5s]                                                 ] [       244]                                                                                                                                     
[1] [route1            ] [output1           ] [saga                                                                          ] [         0]                                                                                                                                     
[1] [route1            ] [setHeader1        ] [setHeader[id]                                                                 ] [         1]                                                                                                                                     
[1] [route1            ] [setHeader2        ] [setHeader[CamelHttpMethod]                                                    ] [         0]                                                                                                                                     
[1] [route1            ] [log1              ] [log                                                                           ] [         0]                                                                                                                                     
[1] [route1            ] [to1               ] [undertow:http://train/api/train/buy/seat                                      ] [         0]                                                                                                                                     
[1]                                                                 
[1] Stacktrace                                                      
[1] ---------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                     
[1] org.apache.camel.http.common.HttpOperationFailedException: HTTP operation failed invoking http://train/api/train/buy/seat with statusCode: 404                                                                                                                              
[1]     at org.apache.camel.component.undertow.UndertowClientCallback.lambda$setupResponseListener$2(UndertowClientCallback.java:235) ~[org.apache.camel.camel-undertow-3.0.1.jar:3.0.1]
[1]     at org.apache.camel.component.undertow.UndertowClientCallback$ErrorHandlingClientCallback.completed(UndertowClientCallback.java:85) [org.apache.camel.camel-undertow-3.0.1.jar:3.0.1]
[1]     at io.undertow.client.http.HttpClientExchange.setResponse(HttpClientExchange.java:125) [io.undertow.undertow-core-2.0.28.Final.jar:2.0.28.Final]
[1]     at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:650) [io.undertow.undertow-core-2.0.28.Final.jar:2.0.28.Final]
[1]     at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:516) [io.undertow.undertow-core-2.0.28.Final.jar:2.0.28.Final]
[1]     at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) [org.jboss.xnio.xnio-api-3.3.8.Final.jar:3.3.8.Final]                                                                                                                                      
[1]     at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) [org.jboss.xnio.xnio-api-3.3.8.Final.jar:3.3.8.Final]
[1]     at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:88) [org.jboss.xnio.xnio-nio-3.3.8.Final.jar:3.3.8.Final]                                                                                                                                            
[1]     at org.xnio.nio.WorkerThread.run(WorkerThread.java:561) [org.jboss.xnio.xnio-nio-3.3.8.Final.jar:3.3.8.Final]                                                                                                                                                           
[1] 2020-03-02 22:33:41.718 WARN  [default-workqueue-3] TimerConsumer - Error processing exchange. Exchange[ID-saga-59465cb6c5-vc7tp-1583188421428-0-1]. Caused by: [org.apache.camel.http.common.HttpOperationFailedException - HTTP operation failed invoking http://train/api
/train/buy/seat with statusCode: 404]

I think something can be wrong with the Istio cluster-local-gateway. The train service is an external name of the local gateway service. Saga can connect the service but it can't find the rest service. Maybe the local gateway doesn't pass through the request to the train pod. Trying to call the train service with curl from the saga pod end with 404 too.

[nicolaferraro]

Improved it to work on OpenShift, but definitely not able to run it on a Knative installation.

The promise of Istio is to allow services to communicate transparently, but this does not seem to be the case.

I'd merge it, but it requires changes to run on Knative.

[sobkowiak]

It seems to be a problem in Istio local gateway. I think I saw another post in camel-k gitter about problem with communicating knative service via the local gateway.