Bitnami charts for Helm are carefully engineered, actively maintained and are the quickest and easiest way to deploy containers on a Kubernetes cluster that are ready to handle production workloads.

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

It also packages the Bitnami MariaDB chart which is required for bootstrapping a MariaDB deployment for the database requirements of the Ghost application.

Get this chart

Download the latest release of the chart from the releases page.

Alternatively, clone the repo if you wish to use the development snapshot:

$ git clone https://github.com/bitnami/charts.git

Installing the Chart

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

$ helm install --name my-release ghost-x.x.x.tgz

Replace the x.x.x placeholder with the chart release version.

The command deploys Ghost 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 Ghost chart and their default values.

Parameter	Description	Default
`imageTag`	`bitnami/ghost` image tag	Ghost image version
`imagePullPolicy`	Image pull policy	`Always` if `imageTag` is `latest`, else `IfNotPresent`
`ghostHost`	Ghost host to create application URLs	`nil`
`ghostPort`	Ghost port to create application URLs along with host	`80`
`ghostLoadBalancerIP`	`loadBalancerIP` for the Ghost Service	`nil`
`ghostUser`	User of the application	`user`
`ghostPassword`	Application password	`bitnami`
`ghostEmail`	Admin email	`user@example.com`
`blogTitle`	Ghost Blog name	`User's Blog`
`smtpHost`	SMTP Host	`nil`
`smtpPort`	SMTP Port	`nil`
`smtpUser`	SMTP User	`nil`
`smtpPassword`	SMTP Password	`nil`
`smtpService`	SMTP service	`nil`
`mariadb.mariadbRootPassword`	MariaDB admin password	`nil`

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

Note

:

For the Ghost application function correctly, you should specify the ghostHost parameter to specify the FQDN (recommended) or the public IP address of the Ghost service.

Optionally, you can specify the ghostLoadBalancerIP parameter to assign a reserved IP address to the Ghost service of the chart. However please note that this feature is only available on a few cloud providers (f.e. GKE).

To reserve a public IP address on GKE:
$ gcloud compute addresses create ghost-public-ip
The reserved IP address can be associated to the Ghost service by specifying it as the value of the ghostLoadBalancerIP parameter while installing the chart.

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

$ helm install --name my-release \
  --set ghostUser=admin,ghostPassword=password,mariadb.mariadbRootPassword=secretpassword \
    ghost-x.x.x.tgz

The above command sets the Ghost administrator account username and password to admin and password respectively. Additionally it sets the MariaDB root user password to secretpassword.

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

$ helm install --name my-release -f values.yaml ghost-x.x.x.tgz

Tip

: You can use the default values.yaml

Persistence

The Bitnami Ghost image stores the Ghost data and configurations at the /bitnami/ghost path of the container.

As a placeholder, the chart mounts an emptyDir volume at this location.

"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."

For persistence of the data you should replace the emptyDir volume with a persistent storage volume, else the data will be lost if the Pod is shutdown.

Step 1: Create a persistent disk

You first need to create a persistent disk in the cloud platform your cluster is running. For example, on GCE you can use the gcloud tool to create a gcePersistentDisk:

$ gcloud compute disks create --size=500GB --zone=us-central1-a ghost-data-disk

Step 2: Update `templates/deployment.yaml`

Replace:

      volumes:
      - name: ghost-data
        emptyDir: {}

with

      volumes:
      - name: ghost-data
        gcePersistentDisk:
          pdName: ghost-data-disk
          fsType: ext4

Note

:

You should also use a persistent storage volume for the MariaDB deployment.

Install the chart after making these changes.

README.md

Ghost

TL;DR;

Introduction