Where to store configuration values in Azure Service fabric application

Question

I am working on Azure Service Fabric Reliable Actor implementation. Any idea/link on where can I store the Configuration value (e.g. DB connection string) and how to access that in code.

Answer 1

A Service Fabric application consists of the code package, a config package, and the data (https://azure.microsoft.com/en-gb/documentation/articles/service-fabric-application-model/).

You can use the config package to store and retrieve any kind of key-value pairs you need e.g. a connection string. Have a look at this article https://azure.microsoft.com/en-us/documentation/articles/service-fabric-manage-multiple-environment-app-configuration/ for more information.

Answer 2

You can add multiple ApplicationParameters file. Just copy and paste the same from Cloud.Xml and use for multiple environment configurations.

Steps to Make necessary changes

1. The values given in the Settings.xml need to be overridden in the ApplicationManifest.xml when it imports the ServiceManifest.xml .Below is the code supporting the overriding changes add them in the ApplicationManifest.xml.

   a) Add the Parameter Default value first

     <Parameters>
        <Parameter Name="StatelessService1_InstanceCount" DefaultValue="-1" />
        <!-- Default Value is set to Point to Dev Database  -->
        <Parameter Name="DatabaseString"DefaultValue="Server=someserver.database.windows.net\;Database=DbDev;user id=[userid];password=[Password];Trusted_Connection=false;" />
     </Parameters>
   

   b) Then override it in the ServiceManifestImport

     <ServiceManifestImport>
             <ServiceManifestRef ServiceManifestName="StatelessServicePkg" 
                     ServiceManifestVersion="1.0.0" />          
         <ConfigOverrides>
              <ConfigOverride Name="Config">
                   <Settings>
                        <Section Name="DatabaseConnections">
                                <Parameter Name="DbString" Value="[DatabaseString]" />
                       </Section>
                  </Settings>
            </ConfigOverride>
       </ConfigOverrides>
     </ServiceManifestImport>
   

2. The above code change will override the following code in settings.xml

   <Section Name="DatabaseConnections">
       <Parameter Name="DbString" Value="Server=someserver.database.windows.net\;Database=DbDev;user id=[userid];password=[Password];Trusted_Connection=false;" />
   </Section> 
   

3. Overall when the application is deployed the values in the ApplicationParameter DevParam.xml or QaParam.xml or ProdParam.xml will overtake all the setting values.

    <Parameters>
        <Parameter Name="StatelessService1_InstanceCount" Value="-1" />
             <Parameter Name="DatabaseString" Value="Server=someserverqa.database.windows.net\;Database=DbQA;user id=[userid];password=[Password];Trusted_Connection=false;" />
    </Parameters>