Plone Helm Chart

This Helm chart deploys Plone CMS on Kubernetes with all required dependencies.

Components

This chart includes the following components:

• Plone Instance: Main Plone CMS application
• PostgreSQL: Database backend using RelStorage
• Solr: Search engine integration (version 9.6.1)
• Memcached: Caching layer

Prerequisites

• Kubernetes 1.19+
• Helm 3.0+
• PV provisioner support in the underlying infrastructure (for persistent volumes)

Installation

To install the chart with the release name my-plone:

helm install my-plone .

To install with custom values:

helm install my-plone . -f custom-values.yaml

Configuration

The following table lists the configurable parameters and their default values.

Plone Configuration

Parameter	Description	Default
replicaCount	Number of Plone replicas	1
image.repository	Plone image repository	plone
image.tag	Plone image tag	latest
image.pullPolicy	Image pull policy	IfNotPresent
service.type	Kubernetes service type	ClusterIP
service.port	Service port	8080

PostgreSQL Configuration

Parameter	Description	Default
postgresql.enabled	Enable PostgreSQL	true
postgresql.auth.database	Database name	zope
postgresql.auth.username	Database user	zope
postgresql.auth.password	Database password	zope
postgresql.primary.persistence.enabled	Enable persistence	true
postgresql.primary.persistence.size	PVC size	8Gi

Solr Configuration

Parameter	Description	Default
solr.enabled	Enable Solr	true
solr.image.repository	Solr image repository	solr
solr.image.tag	Solr image tag	9.6.1-slim
solr.port	Solr port	8983
solr.persistence.enabled	Enable persistence	true
solr.persistence.size	PVC size	8Gi

Memcached Configuration

Parameter	Description	Default
memcached.enabled	Enable Memcached	true
memcached.image.repository	Memcached image repository	memcached
memcached.image.tag	Memcached image tag	1.5.20

Ingress Configuration

Parameter	Description	Default
ingress.enabled	Enable ingress	false
ingress.className	Ingress class name	""
ingress.hosts[0].host	Hostname	portal.localhost

Environment Variables

All Plone environment variables can be configured under plone.env in values.yaml. Default configuration includes:

• RelStorage configuration for PostgreSQL
• Solr integration settings
• Memcached settings
• Plone extensions and language settings
• Authentication settings (Authentic integration)

Uninstallation

To uninstall/delete the my-plone deployment:

helm uninstall my-plone

This command removes all the Kubernetes components associated with the chart and deletes the release.

Persistence

By default, the chart creates PersistentVolumeClaims for both PostgreSQL and Solr. You can disable persistence by setting:

postgresql:
  primary:
    persistence:
      enabled: false

solr:
  persistence:
    enabled: false

Upgrading

To upgrade the chart:

helm upgrade my-plone .

Notes

• The Plone image repository should be updated to point to your actual Plone image
• Database credentials should be changed in production environments
• For production use, consider enabling ingress and configuring proper hostnames
• The chart uses service name templating for PostgreSQL and Solr to ensure proper DNS resolution within the cluster