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What is Kubernetes?

Kubernetes (K8s) is an open-source platform designed for orchestrating containerized workloads and services. It supports declarative configuration and automation while being portable and extensible. Kubernetes boasts a robust ecosystem with extensive community support, tools, and services, making it a go-to choice for managing modern containerized applications.

Using Kubernetes for Sitecore Deployments

With the introduction of Docker images for Sitecore 10, Kubernetes becomes an excellent choice for deploying and managing Sitecore instances. Azure Kubernetes Service (AKS), in particular, is a scalable and flexible platform for hosting these workloads.

Troubleshooting AKS with Sitecore: Common Error

While deploying Sitecore on AKS, you might encounter the following error:

vbnet

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ERROR: Get https://scr.sitecore.com/v2/: x509: certificate signed by unknown authority

This issue arises because Kubernetes defaults to running workloads on a Linux management cluster, while Sitecore services require a Windows cluster. The mismatch leads to certificate validation failure.

Fix: Specify the Node Selector in Your YAML Config

To resolve this, explicitly direct Kubernetes to use a Windows cluster for Sitecore services by adding the following snippet to your YAML configuration file:

yaml

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spec:
  nodeSelector:
    "beta.kubernetes.io/os": windows

This ensures that Kubernetes launches Sitecore services on Windows nodes, resolving the certificate validation issue.

Steps to Deploy Sitecore on Azure Kubernetes Services:

  1. Set Up Local Docker Environment
    Test the Sitecore Docker images locally to ensure they function correctly before deploying to AKS.
  2. Provision an Azure AKS Instance
    Create an Azure Kubernetes cluster with Windows node pools.
  3. Configure YAML Files
    Update the YAML configurations for Sitecore services, ensuring the inclusion of the
  4. nodeSelector
  5. directive.
  6. Upload and Apply Configurations
    Deploy the services to AKS by uploading and applying the YAML configurations.
  7. Validate the Deployment
    Verify that all Sitecore services are running on the Windows node pool without errors.