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How to make a multi-instance StackPack

StackState Self-hosted v5.0.x
This page describes StackState version 5.0.
This documentation set explains how to make a StackPack that can be installed as multiple instances in StackState. Below you can find the introduction to this topic and the steps to get a multi-instance StackPack.
StackPacks can be developed to support multiple instances of the same StackPack. This approach is useful in situations when there is a need to monitor more than one environment within the same technology. Multi-instance support can be achieved by splitting template files of your StackPack and tweaking the provisioning script in a way that supports multiple instances by keeping information that is shared between StackPacks separated from the instance-specific template.
Multi-instance StackPack package looks a little different from a standard StackPack, as there are more than one template files:
├── provisioning
│ ├── icons
│ | └── icon.png
│ ├── scripts
│ │ └── ExampleProvision.groovy
│ └── templates
│ ├── instance template.json.handlebar
│ ├── shared template.json.handlebar
│ └── application template.json.handlebar
├── resources
│ ├── logo.png
│ └──
└── stackpack.conf
Steps to get a multi-instance StackPack: