MediaWiki
MediaWiki is an extremely powerful, scalable software and a feature-rich wiki implementation that uses PHP to process and display data stored in a database, such as MySQL.
TL;DR;
$ helm install stable/mediawiki
Introduction
This chart bootstraps a MediaWiki 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 MediaWiki application.
Bitnami charts can be used with Kubeapps for deployment and management of Helm Charts in clusters. This chart has been tested to work with NGINX Ingress, cert-manager, fluentd and Prometheus on top of the BKPR.
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/mediawiki
The command deploys MediaWiki 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 table lists the configurable parameters of the MediaWiki chart and their default values.
| Parameter | Description | Default |
|---|---|---|
global.imageRegistry |
Global Docker image registry | nil |
global.imagePullSecrets |
Global Docker registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
image.registry |
MediaWiki image registry | docker.io |
image.repository |
MediaWiki Image name | bitnami/mediawiki |
image.tag |
MediaWiki Image tag | {TAG_NAME} |
image.pullPolicy |
Image pull policy | IfNotPresent |
image.pullSecrets |
Specify docker-registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
nameOverride |
String to partially override mediawiki.fullname template with a string (will prepend the release name) | nil |
fullnameOverride |
String to fully override mediawiki.fullname template with a string | nil |
mediawikiUser |
User of the application | user |
mediawikiPassword |
Application password | random 10 character long alphanumeric string |
mediawikiEmail |
Admin email | user@example.com |
mediawikiName |
Name for the wiki | My Wiki |
allowEmptyPassword |
Allow DB blank passwords | yes |
smtpHost |
SMTP host | nil |
smtpPort |
SMTP port | nil |
smtpHostID |
SMTP host ID | nil |
smtpUser |
SMTP user | nil |
smtpPassword |
SMTP password | nil |
externalDatabase.host |
Host of the external database | nil |
externalDatabase.user |
Existing username in the external db | bn_mediawiki |
externalDatabase.password |
Password for the above username | nil |
externalDatabase.database |
Name of the existing database | bitnami_mediawiki |
mariadb.enabled |
Use or not the mariadb chart | true |
mariadb.rootUser.password |
MariaDB admin password | nil |
mariadb.db.name |
Database name to create | bitnami_mediawiki |
mariadb.db.user |
Database user to create | bn_mediawiki |
mariadb.db.password |
Password for the database | random 10 character long alphanumeric string |
service.type |
Kubernetes Service type | LoadBalancer |
service.loadBalancer |
Kubernetes LoadBalancerIP to request | nil |
service.port |
Service HTTP port | 80 |
service.httpsPort |
Service HTTPS port | 443 |
service.externalTrafficPolicy |
Enable client source IP preservation | Cluster |
service.nodePorts.http |
Kubernetes http node port | "" |
service.nodePorts.https |
Kubernetes https node port | "" |
ingress.enabled |
Enable ingress controller resource | false |
ingress.hosts[0].name |
Hostname to your Mediawiki installation | mediawiki.local |
ingress.hosts[0].path |
Path within the url structure | / |
ingress.hosts[0].tls |
Utilize TLS backend in ingress | false |
ingress.hosts[0].certManager |
Add annotations for cert-manager | false |
ingress.hosts[0].tlsSecret |
TLS Secret (certificates) | mediawiki.local-tls-secret |
ingress.hosts[0].annotations |
Annotations for this host's ingress record | [] |
ingress.secrets[0].name |
TLS Secret Name | nil |
ingress.secrets[0].certificate |
TLS Secret Certificate | nil |
ingress.secrets[0].key |
TLS Secret Key | nil |
persistence.enabled |
Enable persistence using PVC | true |
persistence.storageClass |
PVC Storage Class for MediaWiki volume | nil (uses alpha storage class annotation) |
persistence.existingClaim |
An Existing PVC name for MediaWiki volume | nil (uses alpha storage class annotation) |
persistence.accessMode |
PVC Access Mode for MediaWiki volume | ReadWriteOnce |
persistence.size |
PVC Storage Request for MediaWiki volume | 8Gi |
resources |
CPU/Memory resource requests/limits | Memory: 512Mi, CPU: 300m |
livenessProbe.enabled |
Enable/disable the liveness probe (ingest nodes pod) | true |
livenessProbe.initialDelaySeconds |
Delay before liveness probe is initiated (ingest nodes pod) | 120 |
livenessProbe.periodSeconds |
How often to perform the probe (ingest nodes pod) | 10 |
livenessProbe.timeoutSeconds |
When the probe times out (ingest nodes pod) | 5 |
livenessProbe.failureThreshold |
Minimum consecutive failures to be considered failed | 6 |
livenessProbe.successThreshold |
Minimum consecutive successes to be considered successful | 1 |
readinessProbe.enabled |
would you like a readinessProbe to be enabled | true |
readinessProbe.initialDelaySeconds |
Delay before readinessProbe is initiated (ingest nodes pod) | 30 |
readinessProbe.periodSeconds |
How often to perform the probe (ingest nodes pod) | 10 |
readinessProbe.timeoutSeconds |
When the probe times out (ingest nodes pod) | 5 |
readinessProbe.failureThreshold |
Minimum consecutive failures to be considered failed | 6 |
readinessProbe.successThreshold |
Minimum consecutive successes to be considered successful | 1 |
podAnnotations |
Pod annotations | {} |
metrics.enabled |
Start a side-car prometheus exporter | false |
metrics.image.registry |
Apache exporter image registry | docker.io |
metrics.image.repository |
Apache exporter image name | bitnami/apache-exporter |
metrics.image.tag |
Apache exporter image tag | {TAG_NAME} |
metrics.image.pullPolicy |
Image pull policy | IfNotPresent |
metrics.image.pullSecrets |
Specify docker-registry secret names as an array | [] (does not add image pull secrets to deployed pods) |
metrics.podAnnotations |
Additional annotations for Metrics exporter pod | {prometheus.io/scrape: "true", prometheus.io/port: "9117"} |
metrics.resources |
Exporter resource requests/limit | {} |
The above parameters map to the env variables defined in bitnami/mediawiki. For more information please refer to the bitnami/mediawiki image documentation.
Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,
$ helm install --name my-release \
--set mediawikiUser=admin,mediawikiPassword=password,mariadb.mariadbRootPassword=secretpassword \
stable/mediawiki
The above command sets the MediaWiki 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 stable/mediawiki
Tip
: You can use the default values.yaml
Rolling VS Immutable tags
It is strongly recommended to use immutable tags in a production environment. This ensures your deployment does not change automatically if the same tag is updated with a different image.
Bitnami will release a new chart updating its containers if a new version of the main container, significant changes, or critical vulnerabilities exist.
Persistence
The Bitnami MediaWiki image stores the MediaWiki data and configurations at the /bitnami/mediawiki path of the container.
Persistent Volume Claims are used to keep the data across deployments. This is known to work in GCE, AWS, and minikube. See the Configuration section to configure the PVC or to disable persistence.
Upgrading
To 4.0.0
Backwards compatibility is not guaranteed unless you modify the labels used on the chart's deployments. Use the workaround below to upgrade from versions previous to 4.0.0. The following example assumes that the release name is mediawiki:
$ kubectl patch deployment mediawiki-mediawiki --type=json -p='[{"op": "remove", "path": "/spec/selector/matchLabels/chart"}]'
$ kubectl delete statefulset mediawiki-mariadb --cascade=false