What is PowerShell DSC Desired State Configuration?

The term DSC was coined to describe this instrument, which measures energy directly and allows precise measurements of heat capacity. If you’re not willing to wait for the Configuration Mode Frequency interval to elapse, you can force the configuration to apply. #Adjust -SourcePath parameter to match the full filesystem path to your apache2.ps1 file.

He is an experienced devops specialist, data engineer, and software developer. Jonathan has spent years mastering the art of system automation with a variety of different cloud providers and tools. Before he became an engineer, Jonathan was a musician and teacher in New York City.

Current support is Windows Client and Server, Windows Nano Server, Linux, and Azure Automation. Luckily DSC is included within the Windows Instrumentation Framework, making it simple to use with no additional installation or updates. You can follow the current guidelines provided within the documentation to get up and running for other platforms. You can now see the ServerUrl key is indeed pointing to our DSC pull server and AllowInsecureConnection is set to true. After it’s renamed, the MOF file then needs to be copied to the DscService\Configuration directory on the pull server to be retrieved by our target server.

Where available, a link to the external GitHub repo of each resource is also included. The DSC resources are third-party resources that may or may not be documented in their repositories. Available DSC resources and parameters are subject to change. As you can see, you can mix and match DSC resources with common Puppet resources.

Validating Node Enrollment under Automation Account

Using our example, if someone had installed the Web-Ftp-Server Windows Feature, our DSC PowerShell script would not report anything. However, if someone had removed Web-Default-Doc, DSC would report that the feature was no longer in the desired state. When a DSC configuration is no longer in the desired state, it is said to have drifted. The Desired State Configuration is a management platform in a PowerShell that is used for development, configuration, and management of systems. So, if you want to use it, you need a version 4.0 or above of PowerShell.

DSC can push the configuration or the nodes can pull the file when they detect a new version. Desired State Configuration is a Windows platform that automates many of the management functions of a server. The important point is that the configuration is written in code and can become part of the source-controlled code of a server project. Glass transitions may occur as the temperature of an amorphous solid is increased. These transitions appear as a step in the baseline of the recorded DSC signal.

The DSC file

In DSC, each different way of implementing a step is expressed as a “module”. A “group of modules” defines the collection of alternative implementations of a step. This is a working example—optionally, you may install DSC, and try Free Interactive Python Tutorial running this example DSC program as you read through the tutorial. For more details, consult the README in the “one sample location” DSC vignette. One of the first steps in a cloud migration is to choose a data transfer model.

• In studying protein denaturation using DSC, the thermal melt should be at least to some degree reversible, as the thermodynamics calculations rely on chemical equlibrium.
• #This tutorial will be using a Resource Group by the name of DSC_RG.
• For more details, consult the README in the “one sample location” DSC vignette.
• In this PowerShell DSC tutorial, I’ll show you how to get started with PowerShell DSC and provide some basic examples of how to use it.

As the count of endpoints increases, it also gets challenging to manage and monitor all those systems. Links to DSC resources in the Types documentation (MODULES-8772). All notable changes to this project will be documented in this file. The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

Understanding cross-platform DSC – PowerShell Tutorial

We can reference the properties of the DSC configuration data file using dot notation. The call to WebServerConfiguration now has an additional argument ConfigurationData. This tells DSC the file Azure Cloud Engineer Job Description Template that contains the configuration data to load. A DSC configuration data file is just a bunch of Hash tables that can contain other Hash tables or Arrays and typically have a psd1 file extension.

• This lets you specify for individual resources exactly which pull service endpoint to use for config or resources.
• If you have problems getting this module up and running, please contact Support.
• It’d be ideal to have a little bit of understanding of the DSC Concept and basic knowledge of Cloud resources.
• This arrangement is located in a temperature-controlled oven.
• DSC resources are not limited to the built-in options from Microsoft.

You can also have a configuration for each separate node as shown below. It provides a collection of PowerShell language extensions, cmdlets, and a process called declarative scripting.

Drug analysis

Local Configuration Manager checks the nodes to ensure they are running as dictated by the configuration and corrects any changes from that desired. A small amount of sample (1-15 mg) was contained within a closed crucible and placed into a temperature-controlled DSC cell. Once SSHed in, run the PerformRequiredConfigurationChecks.py Python script. This script checks the local system’s configuration against the Azure DSC pull server’s required configuration, per the LCM meta-configuration settings.

No need to refresh your screen or click Refresh, the status will automatically update. Once the process completes, ensure that the status reads Connected. If an error occurs, additional troubleshooting may be required. The source path following the SourcePath parameter https://forexaggregator.com/ must be the full filesystem path to the script file that contains your DSC configuration. The resource Group name, Automation Account name, and VM name are unique to each environment. This tutorial will be using unique names so let’s first assign each name a variable.

The next section will show you a better way to use a custom template and build the template to publish via GPO. You can see the screenshot below showing the system pulling the chocolatey package and performing the installation. You can upgrade and add more components after testing it locally before pushing the template to Automation Account for deployment.

PowerShell Variables

Likewise, as the sample undergoes exothermic processes less heat is required to raise the sample temperature. By observing the difference in heat flow between the sample and reference, differential scanning calorimeters are able to measure the amount of heat absorbed or released during such transitions. DSC may also be used to observe more subtle physical changes, such as glass transitions. It is widely used in industrial settings as a quality control instrument due to its applicability in evaluating sample purity and for studying polymer curing. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time.

There are two prerequisites both of which, thankfully, can be done right from the web browser. This just requires going into your automation account, clicking on DSC, and then selecting add to connect the node to DSC. Secondly, you need to upload and compile the configuration code. So you have your .ps1 config text file locally on your laptop and what you can do from the dashboard is upload it or copy paste it using the configuration editor.

Using differential scanning calorimetry to study the stability to oxidation of samples generally requires an airtight sample chamber. It can be used to determine the oxidative-induction time of a sample. Such tests are usually done isothermally by changing the atmosphere of the sample. First, the sample is brought to the desired test temperature under an inert atmosphere, usually nitrogen. Any oxidation that occurs is observed as a deviation in the baseline. Such analysis can be used to determine the stability and optimum storage conditions for a material or compound.

If we are using the above command in the same DSC script then use -Wait parameter so DSC will wait to start the configuration until the MOF file is loaded into the memory. Whether you are a large organization or a small one, using cloud infrastructure or rack-mounted servers, maintaining the known state of a server is challenging. Several third-party solutions such as Ansible, Chef, and Puppet exist, but they are paid Linux-based products. For Windows folks, there is a free and Windows-centric option available; PowerShell Desired State Configuration . In this PowerShell DSC tutorial, I’ll show you how to get started with PowerShell DSC and provide some basic examples of how to use it. Use the same file as above but this time you’ll need to add a line at the end that converts the mof file to base64 encoded string.