How to assign Instance-Level Public IP(ILPIP) to Azure VM in ARM(Resouce Manager)

Question

We have WSO2CEP running on Azure VM which is a complex event engine and will send out the notification by its pulisher by using simple HTTP POST. However, it will work well on AWS EC2 but not Azure VM. It will throw below exception sometime.

ID: [-1] [] [2016-10-07 16:05:00,043] ERROR {org.wso2.carbon.event.output.adapter.core.OutputEventAdapter} -  Event dropped at Output Adapter '57f629ee23a74a1688b9e7c1_PUBLISHER' for tenant id '-1234', Read timed out 
java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
    at java.net.SocketInputStream.read(SocketInputStream.java:170)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
    at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
    at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
    at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
    at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
    at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
    at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
    at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
    at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
    at org.wso2.carbon.event.output.adapter.http.HTTPEventAdapter$HTTPSender.run(HTTPEventAdapter.java:317)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

I though it possibly caused by the issue discussed here and here. The workaround is assign the Instance-level public IP(ILPIP) to the VM. However, we are now using the Azure Resource Manager model and the all related ILPIP articles seems talk about the classic mode (Azure Service Manager).

Currently we have a dynamic Public IP address assign to the Network Interface of the Virtual Machine.

Is the ARM still have ILPIP? and how can we set it up?

Answer 1

In brief, to my knowledge, there is no way to assign an ILPIP to an ARM VM.

Because there is no concept of ILPIP in ARM. ARM changes the network architecture.

When you assign a public IP to VM in ARM (actually, it is assigned to the vNIC connected to the VM), this IP will not be shared by other VM, which is different with ASM. In ASM, the public IP address is owned by the cloud service. All VMs belonging to same cloud service will share the public IP address. That's the reason why we need ILPIP. But in ARM, VM has its' own public IP address.

So, I would doubt if your problem is same with the link mentioned above. Please try to perform a network capture on the VM to check the exactly network behavior, which is very useful for network troubleshooting.