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Scratch Org Pooling Part 1

  • What is a scratch org pool?
  • What are the benefits of using a scratch org pool?
  • What are the different types of scratch org pools?
  • How do I set up a scratch org pool?
  • What is the prepare command?
  • How do I use the prepare command?
Time to Complete: 90 Minutes

We discussed what scratch orgs are in an earlier section. While scratch orgs are a great way of developing on the Salesforce platform, the time it takes to spin up an org and install all the dependencies grows with each iteration of development. What [email protected] has done is taken the scratch org capability and extended it to create a "pool" of scratch orgs available for development or for use as 'Just in time' Continuous Integration environments used for validating changes in your org.

[email protected] offers two types of scratch org pools
  1. 1.
    A pool that can be used by developers to work on features. These scratch org pools will typically have a longer duration.
  2. 2.
    A pool that is used in your validation stage during the Continuous Integration pipeline
We will be discussing type 1 in this module and will do a "part 2" in the next module.

The prepare command, which is a part of the orchestrator functionality of sfpowerscripts was introduced in 2020 and provides scratch org pooling, specifically tailored for use in your CICD platform.
Prepare command helps you to build a pool of prebuilt scratch orgs which include managed packages as well as packages in your repository. This process allows you to considerably cut downtime in re-creating a scratch org during the validation process when a scratch org is used as a Just-in-time CI environment.

You can also use the command below in the terminal to get more information
sfdx sfpowerscripts:orchestrator:prepare -f config/mypoolconfig.json -v <devhub>

In order for scratch org pooling to work, you will need to install the sfpower-scratchorg-pool unlocked package into your DevHub

A pool configuration defines the 'shape' of your scratch org pool. This includes how it is identified, the size and when the pool expires.
You can find all the configuration fields that can be specified when defining your pool here.

{
"tag": "examplepool",
"maxAllocation": 20,
"expiry": 10,
"batchSize": 10,
"configFilePath": "config/project-scratch-def.json",
"relaxAllIPRanges": true,
"installAll": true,
"enableSourceTracking": true,
"retryOnFailure": true,
"succeedOnDeploymentErrors": true
}
For this module, all IP ranges relaxed, as in the example schema above
  • Create a poolconfig.json file in your repo with a file path of config/poolconfig.json
  • Add the above example schema
  • Update the "max_allocation" tag to 2
  • Make sure the config file path is pointing to your correct project-scratch-def.json location
  • Commit the file to your repo

With all the pre-work we have done, the command to create the pool is deceptively simple
sfdx sfpowerscripts:orchestrator:prepare -f config/poolconfig.json -v Devhub

Now try to use your scratch org pool by fetching it using this command
sfdx sfpowerscripts:pool:fetch --tag examplepool -v Devhub -a Alias
The username and password will be outputted from this command which you can use to log in at https://test.salesforce.com​

We don't need the pool for the next modules, so let's clear up your scratch org space using the delete command.
sfdx sfpowerscripts:pool:delete --tag examplepool -v Devhub

Well done. Scratch org pooling is a big topic to complete. You should now know what a pool is, why you would use one and how to set one up.
Keep your scratch org pool schema in your repo, we will use it later.
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On this page
Learning Objectives
What is a Scratch Org Pool?
Types of Scratch Org Pools
Prepare Command
Steps
Sample configuration files
Recap