第 8 章 Operators
8.1. Using Operators with MicroShift
You can use Operators with MicroShift to create applications that monitor the running services in your cluster. Operators can manage applications and their resources, such as deploying a database or message bus. As customized software running inside your cluster, Operators can be used to implement and automate common operations.
Operators offer a more localized configuration experience and integrate with Kubernetes APIs and CLI tools such as kubectl and oc. Operators are designed specifically for your applications. Operators enable you to configure components instead of modifying a global configuration file.
MicroShift applications are generally expected to be deployed in static environments. However, Operators are available if helpful in your use case. To determine the compatibility of an Operator with MicroShift, check the Operator documentation.
8.1.1. How to use Operators with MicroShift clusters
There are two ways to use Operators for your MicroShift clusters:
8.1.1.1. Manifests for Operators
Operators can be installed and managed directly by using manifests. You can use the kustomize configuration management tool with MicroShift to deploy an application. Use the same steps to install Operators with manifests.
- See Using Kustomize manifests to deploy applications and Using manifests example for details.
8.1.1.2. Operator Lifecycle Manager for Operators
You can also install add-on Operators to a MicroShift cluster using Operator Lifecycle Manager (OLM). OLM can be used to manage both custom Operators and Operators that are widely available. Building catalogs is required to use OLM with MicroShift.
- For details, see Using Operator Lifecycle Manager with MicroShift.
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