Java Webapp Deployment in Azure Service fabric exp

Question

We have a stateless Java Application which I want to be deployed in Azure fabric. I have installed the Fabric SDK and Visual studio tools as per the documentation.

After that I have created the Service Fabric application "Guest Executable" template and my project structure is like below:

I have followed steps similar to the documentation as in https://azure.microsoft.com/en-us/documentation/articles/service-fabric-deploy-existing-app/

My ServiceManifest.xml is below:

<?xml version="1.0" encoding="utf-8"?>
<ServiceManifest Name="Guest1Pkg"
                 Version="1.0.0"
                 xmlns="http://schemas.microsoft.com/2011/01/fabric"
                 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ServiceTypes>
    <StatelessServiceType ServiceTypeName="Guest1Type" UseImplicitHost="true" />
  </ServiceTypes>
  <CodePackage Name="Code" Version="1.0.0">
    <EntryPoint>
      <ExeHost>
        <Program>HelloWorld.war</Program>
        <Arguments></Arguments>
        <WorkingFolder>CodePackage</WorkingFolder>
      </ExeHost>
    </EntryPoint>
  </CodePackage>
  <ConfigPackage Name="Config" Version="1.0.0" />
  <Resources>
    <Endpoints>
      <Endpoint Name="JavaAppTypeEndpoint" Protocol="http" Port="8080" Type="Input" />
    </Endpoints>
  </Resources>
</ServiceManifest>

My ApplicationManifest.xml snippet is below:

<?xml version="1.0" encoding="utf-8"?>
<ApplicationManifest ApplicationTypeName="Application1Type"
                     ApplicationTypeVersion="1.0.0"
                     xmlns="http://schemas.microsoft.com/2011/01/fabric"
                     xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Parameters>
    <Parameter Name="Guest1_InstanceCount" DefaultValue="-1" />
  </Parameters>
  <ServiceManifestImport>
    <ServiceManifestRef ServiceManifestName="Guest1Pkg" ServiceManifestVersion="1.0.0" />
    <ConfigOverrides />
  </ServiceManifestImport>
  <DefaultServices>
    <Service Name="Guest1">
      <StatelessService ServiceTypeName="Guest1Type" InstanceCount="[Guest1_InstanceCount]">
        <SingletonPartition />
      </StatelessService>
    </Service>
  </DefaultServices>
</ApplicationManifest>

I deployed to Service Fabric Explorer in my local, and the build and publish steps are good without any errors:

-------- Package: Project: Application1 succeeded, Time elapsed: 00:00:00.3530634 --------
2>Started executing script 'Deploy-FabricApplication.ps1'.
2>. 'C:\Users\samanoha\Documents\Visual Studio 2015\Projects\Application1\Application1\Scripts\Deploy-FabricApplication.ps1' -ApplicationPackagePath 'C:\Users\samanoha\Documents\Visual Studio 2015\Projects\Application1\Application1\pkg\Debug' -PublishProfileFile 'C:\Users\samanoha\Documents\Visual Studio 2015\Projects\Application1\Application1\PublishProfiles\Local.5Node.xml' -DeployOnly:$true -UnregisterUnusedApplicationVersionsAfterUpgrade $false -OverrideUpgradeBehavior 'None' -OverwriteBehavior 'Always' -SkipPackageValidation:$true -ErrorAction Stop
2>Copying application to image store...
2>Copy application package succeeded
2>Registering application type...
2>Register application type succeeded
2>Removing application package from image store...
2>Remove application package succeeded
2>Finished executing script 'Deploy-FabricApplication.ps1'.
2>Time elapsed: 00:00:01.9327912
========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ==========
========== Deploy: 1 succeeded, 0 failed, 0 skipped ==========

Started executing script 'Publish-NewServiceFabricApplication'.
[void](Connect-ServiceFabricCluster); Import-Module 'C:\Program Files\Microsoft SDKs\Service Fabric\Tools\PSModule\ServiceFabricSDK\ServiceFabricSDK.psm1'; Publish-NewServiceFabricApplication -ApplicationPackagePath 'C:\Users\samanoha\Documents\Visual Studio 2015\Projects\Application1\Application1\pkg\Debug' -ApplicationParameterFilePath 'C:\Users\samanoha\Documents\Visual Studio 2015\Projects\Application1\Application1\PublishProfiles\..\ApplicationParameters\Local.5Node.xml' -ApplicationParameter @{_WFDebugParams_='[]'} -Action Create -SkipPackageValidation:$true -ErrorAction Stop
Creating application...


ApplicationName        : fabric:/Application1
ApplicationTypeName    : Application1Type
ApplicationTypeVersion : 1.0.0
ApplicationParameters  : { "_WFDebugParams_" = "[]" }

Create application succeeded.


Finished executing script 'Publish-NewServiceFabricApplication'.
Time elapsed: 00:00:01.8691591
Started executing script 'Get-ServiceFabricApplicationStatus'.
[void](Connect-ServiceFabricCluster); Import-Module 'C:\Program Files\Microsoft SDKs\Service Fabric\Tools\PSModule\ServiceFabricSDK\ServiceFabricSDK.psm1'; Get-ServiceFabricApplicationStatus -ApplicationName 'fabric:/Application1' -ErrorAction Stop
The application has started.
Service Status:
fabric:/Application1/Guest1 is ready.

The application is ready.
Finished executing script 'Get-ServiceFabricApplicationStatus'.
Time elapsed: 00:00:01.0230548

But the application health state shows error and the event is

"Error event: SourceId='System.Hosting', Property='CodePackageActivation:Code:EntryPoint'.
There was an error during CodePackage activation."

I don't have any idea what might be the issue here in deployment, whether anything needs to be included in Application service Entry point in addition to mentioned above.

Also, The Java webapplication when deployed on Standalone tomcat has the following context http://localhost:8080/HelloWorld/hello . If the Application is deployed in Service fabric cluster, will the URL context for this remains same or should it be something like http://localhost:8080/Application1/Guest1/HelloWorld/hello due to the Azure fabric wrapper around it?

Answer 1

Finally it turned out that we need to separately install Java in the Host virtual machine (Azure VM or local Desktop) and then we have to reference the java path.

So my service manifest is

<EntryPoint>
      <ExeHost>
        <Program>scripts\launchConfig.cmd</Program>
        <Arguments></Arguments>
        <WorkingFolder>CodePackage</WorkingFolder>
        <ConsoleRedirection FileRetentionCount="5" FileMaxSizeInKb="2048"/>
      </ExeHost>
</EntryPoint>

I have created a folder called scripts under Code folder and the script file "launchConfig.cmd" has just single line as below:

"C:\Program Files (x86)\Java\jre1.8.0_101\bin\java.exe" -jar HelloWorld.war

We might need to remove the path hardcodings, but this is how it referred finally.

Answer 2

As described in an earlier answer, one approach is to separately install Java onto the machines.

I wrote about an alternative approach at https://blog.vjrantal.net/2017/04/11/high-availability-java-hosting-in-azure-using-service-fabric/ which is based on packaging the wanted Java runtime into the app package.

Answer 3

The thing you put in the Program config needs to be something that is executable (.exe, .cmd, etc). Service Fabric will try to execute whatever you put in there.

For example, in the doc you linked to, to execute a node.js app the Program is node.exe and the Arguments point to the application:

<ExeHost>
  <Program>node.exe</Program>
  <Arguments>bin/www</Arguments>
  <WorkingFolder>CodePackage</WorkingFolder>
</ExeHost>

Answer 4

The entry point should be a command. HelloWorld.war is not a command. Guest executable is designed for running a command or exe.

<SetupEntryPoint>
     <ExeHost>
         <Program>scripts\launchConfig.cmd</Program>
     </ExeHost>
  </SetupEntryPoint>

and launchConfig.cmd should contain script for running Tomcat or jboss (or any j2ee app server). You should install java, configure tomcat/ jboss , deploy HelloWorld.war in and configure the port before running the server.