kubernetes-handbook/manifests/charts/mongodb

MongoDB

MongoDB is a cross-platform document-oriented database. Classified as a NoSQL database, MongoDB eschews the traditional table-based relational database structure in favor of JSON-like documents with dynamic schemas, making the integration of data in certain types of applications easier and faster.

TL;DR;

$ helm install stable/mongodb

Introduction

This chart bootstraps a MongoDB deployment on a Kubernetes cluster using the Helm package manager.

Prerequisites

• Kubernetes 1.4+ with Beta APIs enabled
• PV provisioner support in the underlying infrastructure

Installing the Chart

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

$ helm install --name my-release stable/mongodb

The command deploys MongoDB on the Kubernetes cluster in the default configuration. The configuration section lists the parameters that can be configured during installation.

Tip: List all releases using helm list

Uninstalling the Chart

To uninstall/delete the my-release deployment:

$ helm delete my-release

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

Configuration

The following tables lists the configurable parameters of the MongoDB chart and their default values.

Parameter	Description	Default
image	MongoDB image	bitnami/mongodb:{VERSION}
imagePullPolicy	Image pull policy	Always if imageTag is latest, else IfNotPresent.
mongodbRootPassword	MongoDB admin password	nil
mongodbUsername	MongoDB custom user	nil
mongodbPassword	MongoDB custom user password	nil
mongodbDatabase	Database to create	nil
serviceType	Kubernetes Service type	ClusterIP
persistence.enabled	Use a PVC to persist data	true
persistence.storageClass	Storage class of backing PVC	nil (uses alpha storage class annotation)
persistence.accessMode	Use volume as ReadOnly or ReadWrite	ReadWriteOnce
persistence.size	Size of data volume	8Gi

The above parameters map to the env variables defined in bitnami/mongodb. For more information please refer to the bitnami/mongodb image documentation.

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

$ helm install --name my-release \
  --set mongodbRootPassword=secretpassword,mongodbUsername=my-user,mongodbPassword=my-password,mongodbDatabase=my-database \
    stable/mongodb

The above command sets the MongoDB root account password to secretpassword. Additionally it creates a standard database user named my-user, with the password my-password, who has access to a database named my-database.

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 stable/mongodb

Tip: You can use the default values.yaml

Persistence

The Bitnami MongoDB image stores the MongoDB data and configurations at the /bitnami/mongodb path of the container.

The chart mounts a Persistent Volume volume at this location. The volume is created using dynamic volume provisioning.