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;

  1. $ 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:

  1. $ 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:

  1. $ 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,

  1. $ helm install --name my-release \
  2. --set mongodbRootPassword=secretpassword,mongodbUsername=my-user,mongodbPassword=my-password,mongodbDatabase=my-database \
  3. 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,

  1. $ 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.