Accessing VM extensions like Chef using Azure sdk for Java programmatically

2 minute read | By Prasad K.

To access the VM extension reference like Chef programmatically, please follow the steps -

This blog shows how can you access the Azure VMs and extensions using the Azure Management APIs programmatically. This version is for Java language. You can find Python version here.

1. Install the Azure sdk for Java using the link - https://azure.microsoft.com/en-us/documentation/articles/java-download-windows/. If you are using Eclipse, please scroll down on the same link for installing the plugin.]{style=”font-size: small;”}

2. Once it is install you can use the below code snippet to access your all VM extension reference.]

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.SAXException;

import com.microsoft.windowsazure.Configuration;
import com.microsoft.windowsazure.core.utils.KeyStoreType;
import com.microsoft.windowsazure.exception.ServiceException;
import com.microsoft.windowsazure.management.compute.ComputeManagementClient;
import com.microsoft.windowsazure.management.compute.ComputeManagementService;
import com.microsoft.windowsazure.management.compute.models.HostedServiceGetDetailedResponse;
import com.microsoft.windowsazure.management.compute.models.HostedServiceListResponse;
import com.microsoft.windowsazure.management.compute.models.ResourceExtensionReference;
import com.microsoft.windowsazure.management.compute.models.Role;
import com.microsoft.windowsazure.management.configuration.ManagementConfiguration;

public class TestResourceExtensionRef {

static String uri = “https://management.core.windows.net/“;
static String subscriptionId = “<your subscription id>”;
static String keyStoreLocation = “<your keystore path>”;
static String keyStorePassword = “<your keystore password>”;

public static void main(String[] args) throws IOException, URISyntaxException, ServiceException, ParserConfigurationException, SAXException {

Configuration config = ManagementConfiguration.configure(
        new URI(uri), 
        subscriptionId,
        keyStoreLocation, // the file path to the JKS
        keyStorePassword, // the password for the JKS
        KeyStoreType.jks // flags that I’m using a JKS key store
        );

// create a management client to call the API
ComputeManagementClient client = ComputeManagementService.create(config);

//ArrayList<Role> vmlist = new ArrayList<Role>();
        HostedServiceListResponse hostedServiceListResponse = client.getHostedServicesOperations().list();
            
        ArrayList<HostedServiceListResponse.HostedService> hostedServicelist = hostedServiceListResponse.getHostedServices();       

        for (HostedServiceListResponse.HostedService hostedService : hostedServicelist) {
        System.out.println(“Hosted Service : ” + hostedService.getServiceName());
        
                HostedServiceGetDetailedResponse hostedServiceGetDetailedResponse = client.getHostedServicesOperations().getDetailed(hostedService.getServiceName());                
                ArrayList<HostedServiceGetDetailedResponse.Deployment> deploymentlist = hostedServiceGetDetailedResponse.getDeployments();

                for (HostedServiceGetDetailedResponse.Deployment deployment : deploymentlist) {
                System.out.println(“Deployment : ” + deployment.getName());                 
                
                    ArrayList<Role> rolelist = deployment.getRoles();
                    
                    for (Role role : rolelist) {
                    System.out.println(“Role : ” + role.getRoleName());
                    ArrayList<ResourceExtensionReference> extnRefList = role.getResourceExtensionReferences();
                    
                    for (ResourceExtensionReference extnRef : extnRefList)
                    {
                    System.out.println(“Resource Extension : ” + extnRef.getName());
                    }
                    }
                    
                }
        }
}

}

 

3. If you want to access the extension for a specific deployment slot, you can use -

ComputeManagementClient client = ComputeManagementService.create(config);

DeploymentGetResponse depResp = client.getDeploymentsOperations().getBySlot("azurechefnode", DeploymentSlot.**Production**);

ArrayList\<Role\> roleList = depResp.getRoles();

**for**(Role rol : roleList){

     ArrayList\<ResourceExtensionReference\> extList = rol.getResourceExtensionReferences();

**for**(ResourceExtensionReference extn : extList)

          System.**out**.println(extn.getName());

}

 

</p>

You may also enjoy