crate

CrateDB Helm Chart

This directory contains a Kubernetes chart to deploy a CrateDB cluster using a StatefulSet.

Prerequisites Details

• Kubernetes 1.9+
• PV support on the underlying infrastructure

StatefulSet Details

• https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/

StatefulSet Caveats

• https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#limitations

Todo

• follow up with helm/charts#8432, if PR completed this chart can be removed from here.

Chart Details

This chart will do the following:

• Implement a HA scalable CrateDB cluster using a Kubernetes StatefulSet.

Installing the Chart

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

$ helm repo add oc https://orchestracities.github.io/charts/
$ helm dependency update
$ helm install --name my-release oc/crate

Connecting to CrateDB

Configuration

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

Parameter	Description	Default
replicaCount	Amount of pods to spawn	3
image.name	The image to pull	crate
image.tag	The version of the image to pull	2.3.6
image.pullPolicy	The pull policy	IfNotPresent
resources	Any resources you wish to assign to the pod	{}
persistentVolume.accessModes	Persistent Volume access modes	[ReadWriteOnce]
persistentVolume.annotations	Annotations for Persistent Volume Claim`	{}
persistentVolume.size	Persistent Volume size	2Gi
persistentVolume.storageClass	Persistent Volume Storage Class	volume.alpha.kubernetes.io/storage-class: default
nodeSelector	Crate Node labels for pod assignment	{}
tolerations	Toleration labels for Crate pod assignment	[]
affinity	Affinity settings for Crate pod assignment	{}
Specify each parameter using the --set key=value[,key=value] argument to helm install.

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

$ helm install --name my-release -f values.yaml oc/crate

Tip: You can use the default values.yaml

Cleanup

To remove the spawned pods you can run a simple helm delete <release-name>.

Helm will however preserve created persistent volume claims, to also remove them execute the commands below.

$ release=<release-name>
$ helm delete $release
$ kubectl delete pvc -l release=$release