Setting up Jenkins in Azure

Before getting started, you’ll need to have:

  • An Azure tenant and subscription.
  • OpenSSH (installation for Windows 10)

Installing Jenkins via Azure Marketplace

The easiest way to install Jenkins is to use the Azure Marketplace link. You’ll likely want to change the size of the VM to something smaller when testing out – you can always increase size later.

Next, SSH into the server and check to see if you can update the OS (as of this writing, the image ships with Ubuntu 16.04 LTS, and can be upgraded to 18.04 LTS).

Setting up SSL using Let’s Encrypt

The next step is setting up SSL using Let’s Encrypt to allow for an HTTPS connection. First, open the 443 port on the VM:

az network nsg rule update -g RG_NAME --nsg-name NSG_NAME -n http-rule --destination-port-ranges 80, 443

Now SSH into the server and modify SSL Offloading:

sudo nano /etc/nginx/sites-available/default

Use the following configuration:

server {
    listen 80 default_server;
    server_name _;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    server_name CUSTOMDOMAIN;
    ssl_certificate /etc/letsencrypt/live/CUSTOMDOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/CUSTOMDOMAIN/privkey.pem;
    location / {
        proxy_set_header        Host $host:$server_port;
        proxy_set_header        X-Real-IP $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Forwarded-Proto $scheme;


        # Fix the “It appears that your reverse proxy set up is broken" error.
        proxy_pass          http://localhost:8080;
        proxy_read_timeout  90;
    }
}

Then run the following commands:

sudo service nginx stop
git clone https://github.com/letsencrypt/letsencrypt
./letsencrypt/letsencrypt-auto certonly
sudo service nginx restart

Accessing and Logging Into Jenkins

After completed, access the Jenkins instance at http://<DNS-NAME>.<LOCATION>.cloudapp.azure.com. Verify that both the SSL connection is valid and that you are on the ‘Unlock Jenkins’ page:

Run the following command in the SSHed server to get a code for the screen:

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Next, you’ll get a request to either install suggested plugins or select plugins as desired. I recommend going through and selecting the plugins desired to keep the installation minimal. Remove anything from the list that you may not need (such as Subversion). You can always add plugins later if you find you need.

After that, create an admin user for yourself, and you’ll be ready to get started!

Next Steps

After you’ve finished setting up Jenkins, a few next steps would be:

Reference

Creating a nopCommerce Plugin in version 3.90 and below

I recently worked with a client using an older version of nopCommerce that needed to have a plugin made for functionality. In particular, this plugin integrates with updown.io to allow for turning checks on and off during scheduled maintenance.

To do this, you’ll need to have the nopCommerce source code available for use.

Creating the Plugin

To get started, create a Class Library in the Plugins folder:

  • Make sure to change the location to the plugin folder below the name.
  • Use naming convention Nop.Plugin.{category}.{name}
  • The categories you can use include:
    • ExternalAuth
    • Widgets
    • ExchangeRate
    • DiscountRules
    • Payments
    • Shipping
    • Tax
    • Misc

Next, go into properties and make sure your Target framework is .NET Framework 4,.5.1.

Next, change the output path for all configurations to deploy to:

..\..\Presentation\Nop.Web\Plugins\{group}.{name}\

This will build the output of the plugin into the Web project, which will ultimately deploy to the nopCommerce application.

After that, copy a web.config file from another plugin.

Next, create a Description.txt file with the following content:

Group: {group}
FriendlyName: {friendly name}
SystemName: {group}.{name}
Version: 0.1
SupportedVersions: {your version of nopCommerce}
Author: {you}
DisplayOrder: 1
FileName: Nop.Plugin.{group}.{name}.dll
Description: {a description}

Set both the web.config and Description.txt files to ‘Copy if newer’.

Finally, there is a Class.cs file that was created when creating the Class Library. Rename the file to {name}Plugin.cs and use the following code snippet:

public class YourPlugin : BasePlugin, IMiscPlugin
    {
        public void GetConfigurationRoute(out string actionName, out string controllerName, out RouteValueDictionary routeValues)
        {
            actionName = "Configure";
            controllerName = "Your";
            routeValues = new RouteValueDictionary()
            {
                { "Namespaces", "Nop.Plugin.Misc.Your.Controllers" },
                { "area", "" }
            };
        }
    }

Once this is done, you should be able to clean, build, and publish the project. Check the plugins list of the admin backend to see your plugin listed:

Just to ensure everything is working, go ahead and install the plugin. The plugin should install successfully, and the plugin will then be running on your site. You’re now ready to make changes to the plugin to modify NopCommerce capabilities.

Next Steps

After the initial plugin was created, next steps include:

  • Creating a logo named logo.png and upload it to the plugin. Set the image to ‘Copy if newer’ and size the image to around 50×50.
  • Set up a configuration page to allow for customizing data on the plugin (notice that for now, clicking on ‘Configure’ if applicable will crash the site.)

Reference: 
http://docs.nopcommerce.com/pages/viewpage.action?pageId=22675509

Create a Java Web App with Spring Boot Starter, Gradle, and Azure Active Directory

Working on a project that would eventually use Azure Active Directory for authentication, I wanted to use Microsoft’s guide to get started with an app that could authenticate. However, the guide is written using Maven – and in our case, we are using Gradle for builds across the ecosystem.

I was able to mostly follow the guide provided, but ran into a gotcha – involving having to add a fixed dependency to get the system working. In addition, I added a secondary API endpoint to allow for testing both with and without group authentication.

To get started, you’ll need the following:

Create an App With Spring Initializr

To get started, create an app at https://start.spring.io/ with the following information:

  • Project: Gradle
  • Project Metadata Artifact: oauth2-demo-gradle
  • Dependencies: Web, Security, Azure Active Directory

After clicking ‘Generate Project’, a ZIP file will be created. Extract this file to someone on your local machine, as you’ll be configuring it later.

Set Up Azure Active Directory

After the app is created, the next step is setting up Azure Active Directory for authentication. Follow the Create Azure Active Directory instance section, taking note of the App Registration information provided.

Once you get to the section involving configuration of the app, come back to this guide – you’ll make specific changes to make the testing experience both compatible with Gradle and a little more user-friendly.

Configure and Compile the App

Once Azure Active Directory is configured, open your Java IDE and import the build.gradle file as a project. After that’s done, there are a few files to configure/create.

Add the following dependencies into the build.gradle file (notice the third dependency, if this one is not added, you’ll run into an exception when testing):

implementation 'org.springframework.security:spring-security-oauth2-client'
implementation 'org.springframework.security:spring-security-oauth2-jose'
implementation 'com.nimbusds:oauth2-oidc-sdk:5.64.4'

Edit /src/main/resources/application.properties to look like the following:

# Specifies your Active Directory ID:
azure.activedirectory.tenant-id=22222222-2222-2222-2222-222222222222

# Specifies your App Registration's Application ID:
spring.security.oauth2.client.registration.azure.client-id=11111111-1111-1111-1111-1111111111111111

# Specifies your App Registration's secret key:
spring.security.oauth2.client.registration.azure.client-secret=AbCdEfGhIjKlMnOpQrStUvWxYz==

# Specifies the list of Active Directory groups to use for authorization:
azure.activedirectory.active-directory-groups=Users

Create a file called /controller/HelloController.java and add the following:

package com.example.oauth2demogradle.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.access.prepost.PreAuthorize;

@RestController
public class HelloController {
    @Autowired
    @RequestMapping("/version")
    public String helloWorld() {
        return "Hello World! (no auth required)";
    }

    @Autowired
    @RequestMapping("/secure")
    public String helloWorldSecure() {
        return "Hello World! (authenticated in Azure AD)";
    }

    @Autowired
    @PreAuthorize("hasRole('bams-devops')")
    @RequestMapping("/secureByGroup")
    public String helloWorldByGroup() {
        return "Hello World! (pre-authorized via AD group)";
    }
}

Create another file called security/WebSecurityConfig.java and add the following:

package com.example.oauth2demogradle.security;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.oauth2.client.oidc.userinfo.OidcUserRequest;
import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
import org.springframework.security.oauth2.core.oidc.user.OidcUser;

@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private OAuth2UserService<OidcUserRequest, OidcUser> oidcUserService;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/version").permitAll()
                .anyRequest().authenticated()
                .and()
                .oauth2Login()
                .userInfoEndpoint()
                .oidcUserService(oidcUserService);
    }
}

Build and Verify App

Now that the configuration is complete, next step is building and testing. Run the following Gradle commands (easy way to do this is through the IDE):

clean
build
bootRun

You should end up with a log like the following:

Once this is confirmed, access http://localhost:8080/version. You should be able to access without logging into Azure.

Next, check http://localhost:8080/secure. You should receive a request to log in to Azure services. Log in as the user created in the step above, and you should be able to get a Hello World message.

Finally, confirm that the /secureByGroup endpoint is also working. This endpoint will verify the logged in user is part of a verified group.

This code can be found at

Reference: https://docs.microsoft.com/en-us/java/azure/spring-framework/configure-spring-boot-starter-java-app-with-azure-active-directory?view=azure-java-stable

]]>

Setting up OpenVPN on Azure From Scratch

Why do this? One of the major benefits being able to use the internet with a specified IP address. If you’re going to be working systems that whitelist specific IP addresses, you can use this solution to allow for access regardless of both machine and location.

This guide assumes that you:

  • Have an Azure subscription in place.
  • Have a means of SSHing into a virtual machine, such as OpenSSH.

Creating the Virtual Machine

First, access the Azure Marketplace image for OpenVPN.

Next, fill out the form to create a virtual machine with OpenVPN pre-installed. The following information

Once you’re finished, it should look like this:

After creating the virtual machine, access it via the Azure portal and take note of the Public IP address – you’ll use this to SSH into the server and complete the installation:

Creating and Securing the Domain Using Let’s Encrypt

You may want to run OpenVPN using a domain. You have two options:

  1. Use the domain provided by Azure.
  2. Add a CNAME record to a domain you already own.

Access the Public IP and create a DNS name label.

Verify you can access the OpenVPN server using the domain provided by Azure (making sure to use HTTPS).

If desired, you can also create a subdomain (such as vpn.<your-domain>.com). Create a CNAME record that looks like the following:

  • Host: vpn
  • Value: use the Azure domain provided above.

Let DNS propagate (might take a second), and try accessing with your own domain.

Now, whether you use Azure’s domain or your own, the next step is to set up a certificate with Let’s Encrypt:

SSH into the server using OpenSSH and the admin credentials created when creating the virtual machine:

ssh <ADMIN_NAME>@<YOUR_DOMAIN_NAME>

Use the CertBot site to generate instructions for installation, using the following commands for guidance (you are using ‘None of the above’ for the software)

lsb_release -a #determine the OS

Before starting, you will need to run the following to allow for DNS:

echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf > /dev/null

Run the commands provided by CertBot to obtain your cert (spin up a temporary webserver). When doing this, you will need to open Port 80 to allow Let’s Encrypt to connect.

Verify that accessing the site using HTTPS will result in a secure connection.

Running The OpenVPN Installation

Once SSHed into the virtual machine, you’ll be asked to complete the OpenVPN installation. For most settings, you’ll just use default options. After the installation is complete, you’ll need to reset the admin password:

sudo su -
passwd openvpn

Once this is done, verify the installation is complete and access the OpenVPN admin section at the following URL: https://<YOUR_PUBLIC_IP>/admin. Log in using the following credentials:

  • Username: openvpn
  • Password: the password generated in the step above.

Once this is done, you’ll want to change the server name to the generated public IP address from Azure. Go to ‘Network Settings’ and change the IP address to reflect your public IP, alongside making the following changes:

Setting up OpenVPN Connect

To verify that VPN is working and that you can connect, access the URL https://<PUBLIC_IP>. Log in using the same credentials above and download the OpenVPN Connect application for your operating system.

Once this is done, you can import the record from the server, and log in using the credentials provided above.

Finally, you can verify everything is working by checking your IP again. If your IP address matches the VPN server, you’ve successfully set up the VPN!

Next Steps

  • Remove SSH access to the server, requiring whitelisting again from Azure to allow for configuration.

]]>