Wednesday, 9 September 2015

Jenkins and Powershell Remoting on Windows

Welcome to the latest JenkinsHeaven post!

Requirement

Auto deployment of a database as part of the build to SQL Server on a remote machine running Windows 2012 R2.

As the application database has views and (at time of writing), DBMigrations does not support views it was decided that we would use Powershell to execute SQL scripts against the SQL Server on the remote machine.

So Jenkins needs to execute Powershell and it needs to execute on a remote machine.

Let's break it down and build it up.

Install the Powershell plugin from the update center.

First we need to prove connectivity. Let's just squirt a file from Jenkins to the remote machine using powershell.

Follow the instructions here to test powershell is working locally on the Jenkins machine.

In Part 2 here, we don't need to do all of it. Let me elaborate.

  1. The "Using SSL on the Jenkins Web Interface" section is optional. I didn't have to do this to get connectivity working.
  2. Set up trustedhosts as per the "Configure the Jenkins Server for Remoting and Script Execution" section. I executed Set-Item WSMan:\localhost\Client\TrustedHosts -Value myserver in the Powershell console on the remote machine specifying the IP address of the Jenkins box for myserver
  3. Additionally, make sure you change line 10 of the Powershell script to use your username (don't forget the domain prefix if you need it.) and specify the correct name of the credential on line 6 that you would have set up in the Global Passwords step earlier. NB. Global Passwords are now under Jenkins > Configure System

Next, we need to open the firewall on the remote machine. Search for "Windows Firewall" and open Windows Firewall with Advanced Security

For each of the following rules:

  • Windows Remote Management - Compatibility Mode (HTTP-In) - Domain
  • Windows Remote Management - Compatibility Mode (HTTP-In) - Private, Public
  • Windows Remote Management (HTTP-In) - Domain
  • Windows Remote Management (HTTP-In) - Private, Public

...do the following:

  1. Enable the rule; and
  2. Right click, Go to Properties > Scope and select "Any IP Address" option in both the Local IP Address and Remote IP Address sections.
5. Open the Powershell command prompt on the remote machine and as per this execute Enable-PSRemoting -Force.

You should now be able to execute the "Create Text File Remotely" job on Jenkins and see the output on the remote machine.

Till next time...

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