charts/charts/stable/zalando-postgres-cluster

zalando-postgres-cluster

Creates a postgres cluster using the Zalando Postgres operator and local storage

This chart is not maintained by the upstream project and any issues with the chart should be raised here

Source Code

• https://github.com/zalando/postgres-operator

Requirements

Dependencies

Repository	Name	Version
https://library-charts.k8s-at-home.com	common	3.1.1

TL;DR

helm repo add k8s-at-home https://k8s-at-home.com/charts/
helm repo update
helm install zalando-postgres-cluster k8s-at-home/zalando-postgres-cluster

Installing the Chart

To install the chart with the release name zalando-postgres-cluster

helm install zalando-postgres-cluster k8s-at-home/zalando-postgres-cluster

Uninstalling the Chart

To uninstall the zalando-postgres-cluster deployment

helm uninstall zalando-postgres-cluster

The command removes all the Kubernetes components associated with the chart including persistent volumes and deletes the release.

Configuration

Read through the values.yaml file. It has several commented out suggested values. Other values may be used from the values.yaml from the common library.

Specify each parameter using the --set key=value[,key=value] argument to helm install.

helm install zalando-postgres-cluster \
  --set env.TZ="America/New York" \
    k8s-at-home/zalando-postgres-cluster

Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart.

helm install zalando-postgres-cluster k8s-at-home/zalando-postgres-cluster -f values.yaml

Custom configuration

This chart is a wrapper for the Zalando postgres operator to create a high available Postgres cluster using nodes local storage.

Features added by this wrapper:

• creates an storage class using local storage in the nodes specified in persistentVolumes.replicaNodes. These replicas survive a tear-down and tear-up of the cluster.
• (optional) does sql dumps to an existing PVC with K8S cronjobs. The Operator only supports backups to cloud, not NFS PVC for example.
• Define the password for the DB so that it can be used accross tear-down and tear-up of the cluster.

Values

Important: When deploying an application Helm chart you can add more values from our common library chart here

Key	Type	Default	Description
dumpBackup.existingClaim	string	nil
dumpBackup.image.pullPolicy	string	"IfNotPresent"
dumpBackup.image.repository	string	"postgres"
dumpBackup.image.tag	string	"latest"
dumpBackup.resources.requests.cpu	string	"5m"
dumpBackup.resources.requests.memory	string	"10Mi"
dumpBackup.schedule	string	"@daily"	Backup schedule for postgres dumps
dumpBackup.subpath	string	nil	Persistent volume claim subpath for the backups @default: <subpathPrefix/
dumpBackup.subpathPrefix	string	"backup/db"	Persistent volume claim subpath prefix for the backups
persistentVolumes.accessModes[0]	string	"ReadWriteOnce"
persistentVolumes.annotations	object	{}
persistentVolumes.hostPath	string	nil	Local path for the persistent volumes @default: <hostPathPrefix/
persistentVolumes.hostPathPrefix	string	"/run/db"	Local prefix for persistent volumes NOTE: The default is in tempfs - you should change to a persistent place for production!!!
persistentVolumes.labels	object	{}
persistentVolumes.reclaimPolicy	string	"Retain"	persistentVolumeReclaimPolicy for the persistent volumes Recicle will delete content once DB is deleted while Retain (default) will keep it.
persistentVolumes.replicaNodes	list	["node1.example.com","node2.example.com"]	Replica nodes Must set with at least 2 nodes for the cluster to be highly available
postgresql.databases	object	{"postgres":"postgres"}	databases to create and their user
postgresql.numberOfInstances	string	nil	Number of replicas It will be automatically set with the number of replicaNodes so any values set here are ignored.
postgresql.postgresql.version	string	"13"	Postgres version to deploy - see which versions are supported by the operator
postgresql.teamId	string	nil	team Id for the DB cluster
postgresql.users	object	{"postgres":["superuser","createdb"]}	DB users to create (see operator)
postgresql.volume.size	string	"1Gi"	Size of the persistance volume to allocate
postgresql.volume.storageClass	string	nil	Name of the storage class
superuser.password	string	nil	Superuser password
superuser.secret	string	nil	Superuser k8s secret name. It must match the patter used by the operator
superuser.user	string	nil	Superuser user used for cronjobs

Changelog

All notable changes to this application Helm chart will be documented in this file but does not include changes from our common library. To read those click here.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[2.0.0]

Added

• N/A

Changed

• BREAKING: Upgraded the common library dependency to version 3.1.0. This introduces several breaking changes (service, ingress and persistence keys have been refactored). Be sure to check out the library chart for the up-to-date values.

Removed

• N/A

1.0.0

Added

• N/A

Changed

• N/A

Removed

• N/A

Support

• See the Docs
• Open an issue
• Ask a question
• Join our Discord community

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