Feature/add dns as helm chart

[klinch0]

Summary by CodeRabbit

• New Features

  • Introduced a .helmignore file to streamline Helm packaging by excluding unnecessary files.
  • Added a Chart.yaml for CoreDNS, providing essential metadata for deployment in Kubernetes.
  • Implemented a new HelmRelease configuration for managing CoreDNS deployment.
  • Defined a JSON schema for DNS forwarding parameters, enhancing configuration validation.
  • Added forward_params to allow custom DNS server settings in CoreDNS.
  • Introduced disabledDNSAddon parameter to control the CoreDNS addon state in Kubernetes.
  • Added comprehensive values.yaml file for extensive customization of CoreDNS deployment.
  • Implemented a ServiceMonitor for Prometheus integration to enhance observability of CoreDNS.

• Bug Fixes

  • Updated the Helm chart version from 0.9.0 to 0.10.0 to reflect recent improvements.

• Chores

  • Enhanced configurability of Kubernetes templates with conditional logic for DNS addon inclusion.

[coderabbitai[bot]]

Walkthrough

The changes introduce a new Helm chart for the CoreDNS application, encompassing configuration files such as .helmignore, Chart.yaml, values.yaml, and a JSON schema for validation. Additionally, updates were made to the existing Kubernetes application chart and templates, including parameters to control the state of the CoreDNS addon. These modifications improve the configuration and management of CoreDNS within a Kubernetes environment.

Changes

File Path	Change Summary
packages/apps/coredns/.helmignore	New file specifying patterns for files to be ignored by Helm when packaging the application.
packages/apps/coredns/Chart.yaml	New Helm chart configuration file with metadata for the CoreDNS service.
packages/apps/coredns/templates/coredns.yaml	New HelmRelease configuration for deploying CoreDNS, detailing server configurations and plugins.
packages/apps/coredns/values.schema.json	New JSON schema defining structured configuration parameters for DNS forwarding.
packages/apps/coredns/values.yaml	New file defining common parameters, specifically for DNS forwarding configuration.
packages/apps/kubernetes/Chart.yaml	Updated version number from 0.9.0 to 0.10.0.
packages/apps/kubernetes/templates/cluster.yaml	Added conditional logic to include coreDNS configuration based on disabledDNSAddon.
packages/apps/kubernetes/values.schema.json	New property disabledDNSAddon added to control the state of the CoreDNS addon.
packages/apps/kubernetes/values.yaml	New parameter disabledDNSAddon added to manage the CoreDNS addon state.
packages/system/coredns/Chart.yaml	New file defining essential metadata for the cozy-coredns package.
packages/system/coredns/Makefile	New Makefile establishing a build and update process for the CoreDNS application.
packages/system/coredns/charts/coredns/.helmignore	New file specifying patterns for files to be ignored during package builds.
packages/system/coredns/charts/coredns/Chart.yaml	New file specifying metadata and configuration for deploying CoreDNS.
packages/system/coredns/charts/coredns/README.md	New documentation file outlining installation and configuration options for CoreDNS.
packages/system/coredns/charts/coredns/templates/NOTES.txt	New file providing deployment and accessibility information for CoreDNS.
packages/system/coredns/charts/coredns/templates/_helpers.tpl	New file with template functions for generating Kubernetes resource names and labels.
packages/system/coredns/charts/coredns/templates/clusterrole-autoscaler.yaml	New ClusterRole configuration for the CoreDNS autoscaler.
packages/system/coredns/charts/coredns/templates/clusterrole.yaml	New ClusterRole configuration for CoreDNS deployment management.
packages/system/coredns/charts/coredns/templates/clusterrolebinding-autoscaler.yaml	New ClusterRoleBinding configuration for the autoscaler.
packages/system/coredns/charts/coredns/templates/clusterrolebinding.yaml	New ClusterRoleBinding configuration for CoreDNS deployment.
packages/system/coredns/charts/coredns/templates/configmap-autoscaler.yaml	New ConfigMap template for the autoscaler configuration.
packages/system/coredns/charts/coredns/templates/configmap.yaml	New ConfigMap defining CoreDNS configuration settings.
packages/system/coredns/charts/coredns/templates/deployment-autoscaler.yaml	New deployment configuration for the CoreDNS autoscaler.
packages/system/coredns/charts/coredns/templates/deployment.yaml	New deployment configuration for CoreDNS instances.
packages/system/coredns/charts/coredns/templates/hpa.yaml	New template for configuring a Horizontal Pod Autoscaler for CoreDNS.
packages/system/coredns/charts/coredns/templates/poddisruptionbudget.yaml	New Pod Disruption Budget configuration for CoreDNS.
packages/system/coredns/charts/coredns/templates/podsecuritypolicy.yaml	New PodSecurityPolicy configuration for CoreDNS deployment security.
packages/system/coredns/charts/coredns/templates/service-metrics.yaml	New Service resource for metrics collection in CoreDNS.
packages/system/coredns/charts/coredns/templates/service.yaml	New Service configuration for CoreDNS.
packages/system/coredns/charts/coredns/templates/serviceaccount-autoscaler.yaml	New ServiceAccount definition for the autoscaler.
packages/system/coredns/charts/coredns/templates/serviceaccount.yaml	New ServiceAccount template for CoreDNS deployment.
packages/system/coredns/charts/coredns/templates/servicemonitor.yaml	New ServiceMonitor resource for Prometheus monitoring integration.
packages/system/coredns/charts/coredns/values.yaml	New file defining default configuration values for CoreDNS deployment.
packages/system/coredns/values.yaml	New file defining resource management settings for CoreDNS.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Helm
    participant Kubernetes

    User->>Helm: Deploy CoreDNS
    Helm->>Kubernetes: Install CoreDNS Chart
    Kubernetes->>Helm: Acknowledge Installation
    Helm->>User: Deployment Successful

🐰 In the meadow, I hop with glee,
New charts and values, oh what a spree!
CoreDNS dances, with plugins so bright,
Forwarding queries, day and night.
With options to tweak, and settings to play,
Hooray for the changes, hip-hip-hooray! 🌼

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