nextcloud

nextcloud is a file sharing server that puts the control and security of your own data back into your hands.

TL;DR;

helm repo add nextcloud https://nextcloud.github.io/helm/
helm install my-release nextcloud/nextcloud

Introduction

This chart bootstraps an nextcloud 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 nextcloud application.

Prerequisites

• Kubernetes 1.9+ with Beta APIs enabled
• PV provisioner support in the underlying infrastructure
• Helm >=3.7.0 (for subchart scope exposing)

Installing the Chart

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

helm repo add nextcloud https://nextcloud.github.io/helm/
helm install my-release nextcloud/nextcloud

The command deploys nextcloud 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 nextcloud chart and their default values.

Parameter	Description	Default
image.repository	nextcloud Image name	nextcloud
image.tag	nextcloud Image tag	{VERSION}
image.pullPolicy	Image pull policy	IfNotPresent
image.pullSecrets	Specify image pull secrets	nil
ingress.className	Name of the ingress class to use	nil
ingress.enabled	Enable use of ingress controllers	false
ingress.servicePort	Ingress' backend servicePort	http
ingress.annotations	An array of service annotations	nil
ingress.labels	An array of service labels	nil
ingress.path	The Path to use in Ingress' paths	/
ingress.pathType	The PathType to use in Ingress' paths	Prefix
ingress.tls	Ingress TLS configuration	[]
nextcloud.host	nextcloud host to create application URLs	nextcloud.kube.home
nextcloud.username	User of the application	admin
nextcloud.password	Application password	changeme
nextcloud.existingSecret.enabled	Whether to use an existing secret or not	false
nextcloud.existingSecret.secretName	Name of the existing secret	nil
nextcloud.existingSecret.usernameKey	Name of the key that contains the username	nil
nextcloud.existingSecret.passwordKey	Name of the key that contains the password	nil
nextcloud.existingSecret.smtpUsernameKey	Name of the key that contains the SMTP username	nil
nextcloud.existingSecret.smtpPasswordKey	Name of the key that contains the SMTP password	nil
nextcloud.update	Trigger update if custom command is used	0
nextcloud.containerPort	Customize container port when not running as root	80
nextcloud.datadir	nextcloud data dir location	/var/www/html/data
nextcloud.mail.enabled	Whether to enable/disable email settings	false
nextcloud.mail.fromAddress	nextcloud mail send from field	nil
nextcloud.mail.domain	nextcloud mail domain	nil
nextcloud.mail.smtp.host	SMTP hostname	nil
nextcloud.mail.smtp.secure	SMTP connection ssl or empty	''
nextcloud.mail.smtp.port	Optional SMTP port	nil
nextcloud.mail.smtp.authtype	SMTP authentication method	LOGIN
nextcloud.mail.smtp.name	SMTP username	''
nextcloud.mail.smtp.password	SMTP password	''
nextcloud.configs	Config files created in /var/www/html/config	{}
nextcloud.persistence.subPath	Set the subPath for nextcloud to use in volume	nil
nextcloud.phpConfigs	PHP Config files created in /usr/local/etc/php/conf.d	{}
nextcloud.defaultConfigs.\.htaccess	Default .htaccess to protect /var/www/html/config	true
nextcloud.defaultConfigs.redis\.config\.php	Default Redis configuration	true
nextcloud.defaultConfigs.apache-pretty-urls\.config\.php	Default Apache configuration for rewrite urls	true
nextcloud.defaultConfigs.apcu\.config\.php	Default configuration to define APCu as local cache	true
nextcloud.defaultConfigs.apps\.config\.php	Default configuration for apps	true
nextcloud.defaultConfigs.autoconfig\.php	Default auto-configuration for databases	true
nextcloud.defaultConfigs.smtp\.config\.php	Default configuration for smtp	true
nextcloud.strategy	specifies the strategy used to replace old Pods by new ones	type: Recreate
nextcloud.extraEnv	specify additional environment variables	{}
nextcloud.extraVolumes	specify additional volumes for the NextCloud pod	{}
nextcloud.extraVolumeMounts	specify additional volume mounts for the NextCloud pod	{}
nginx.enabled	Enable nginx (requires you use php-fpm image)	false
nginx.image.repository	nginx Image name	nginx
nginx.image.tag	nginx Image tag	alpine
nginx.image.pullPolicy	nginx Image pull policy	IfNotPresent
nginx.config.default	Whether to use nextclouds recommended nginx config	true
nginx.config.custom	Specify a custom config for nginx	{}
nginx.resources	nginx resources	{}
lifecycle.postStartCommand	Specify deployment lifecycle hook postStartCommand	nil
lifecycle.preStopCommand	Specify deployment lifecycle hook preStopCommand	nil
internalDatabase.enabled	Whether to use internal sqlite database	true
internalDatabase.database	Name of the existing database	nextcloud
externalDatabase.enabled	Whether to use external database	false
externalDatabase.type	External database type: mysql, postgresql	mysql
externalDatabase.host	Host of the external database in form of host:port	nil
externalDatabase.database	Name of the existing database	nextcloud
externalDatabase.user	Existing username in the external db	nextcloud
externalDatabase.password	Password for the above username	nil
externalDatabase.existingSecret.enabled	Whether to use a existing secret or not	false
externalDatabase.existingSecret.secretName	Name of the existing secret	nil
externalDatabase.existingSecret.usernameKey	Name of the key that contains the username	nil
externalDatabase.existingSecret.passwordKey	Name of the key that contains the password	nil
mariadb.enabled	Whether to use the MariaDB chart	false
mariadb.auth.database	Database name to create	nextcloud
mariadb.auth.password	Password for the database	changeme
mariadb.auth.username	Database user to create	nextcloud
mariadb.auth.rootPassword	MariaDB admin password	nil
redis.enabled	Whether to install/use redis for locking	false
redis.usePassword	Whether to use a password with redis	false
redis.password	The password redis uses	''
cronjob.enabled	Whether to enable/disable cronjob	false
cronjob.schedule	Schedule for the CronJob	*/15 * * * *
cronjob.annotations	Annotations to add to the cronjob	{}
cronjob.curlInsecure	Set insecure (-k) option to curl	false
cronjob.failedJobsHistoryLimit	Specify the number of failed Jobs to keep	5
cronjob.successfulJobsHistoryLimit	Specify the number of completed Jobs to keep	2
cronjob.resources	Cronjob Resources	nil
cronjob.nodeSelector	Cronjob Node selector	nil
cronjob.tolerations	Cronjob tolerations	nil
cronjob.affinity	Cronjob affinity	nil
service.type	Kubernetes Service type	ClusterIP
service.loadBalancerIP	LoadBalancerIp for service type LoadBalancer	nil
service.nodePort	NodePort for service type NodePort	nil
persistence.enabled	Enable persistence using PVC	false
persistence.annotations	PVC annotations	{}
persistence.storageClass	PVC Storage Class for nextcloud volume	nil (uses alpha storage class annotation)
persistence.existingClaim	An Existing PVC name for nextcloud volume	nil (uses alpha storage class annotation)
persistence.accessMode	PVC Access Mode for nextcloud volume	ReadWriteOnce
persistence.size	PVC Storage Request for nextcloud volume	8Gi
persistence.nextcloudData.enabled	Create a second PVC for the data folder in nextcloud	false
persistence.nextcloudData.annotations	see persistence.annotations	{}
persistence.nextcloudData.storageClass	see persistence.storageClass	nil (uses alpha storage class annotation)
persistence.nextcloudData.existingClaim	see persistence.existingClaim	nil (uses alpha storage class annotation)
persistence.nextcloudData.accessMode	see persistence.accessMode	ReadWriteOnce
persistence.nextcloudData.size	see persistence.size	8Gi
resources	CPU/Memory resource requests/limits	{}
rbac.enabled	Enable Role and rolebinding for priveledged PSP	false
rbac.serviceaccount.create	Wether to create a serviceaccount or use an existing one (requires rbac)	true
rbac.serviceaccount.name	The name of the sevice account that the deployment will use (requires rbac)	nextcloud-serviceaccount
livenessProbe.enabled	Turn on and off liveness probe	true
livenessProbe.initialDelaySeconds	Delay before liveness probe is initiated	10
livenessProbe.periodSeconds	How often to perform the probe	10
livenessProbe.timeoutSeconds	When the probe times out	5
livenessProbe.failureThreshold	Minimum consecutive failures for the probe	3
livenessProbe.successThreshold	Minimum consecutive successes for the probe	1
readinessProbe.enabled	Turn on and off readiness probe	true
readinessProbe.initialDelaySeconds	Delay before readiness probe is initiated	10
readinessProbe.periodSeconds	How often to perform the probe	10
readinessProbe.timeoutSeconds	When the probe times out	5
readinessProbe.failureThreshold	Minimum consecutive failures for the probe	3
readinessProbe.successThreshold	Minimum consecutive successes for the probe	1
startupProbe.enabled	Turn on and off startup probe	false
startupProbe.initialDelaySeconds	Delay before readiness probe is initiated	30
startupProbe.periodSeconds	How often to perform the probe	10
startupProbe.timeoutSeconds	When the probe times out	5
startupProbe.failureThreshold	Minimum consecutive failures for the probe	30
startupProbe.successThreshold	Minimum consecutive successes for the probe	1
hpa.enabled	Boolean to create a HorizontalPodAutoscaler	false
hpa.cputhreshold	CPU threshold percent for the HorizontalPodAutoscale	60
hpa.minPods	Min. pods for the Nextcloud HorizontalPodAutoscaler	1
hpa.maxPods	Max. pods for the Nextcloud HorizontalPodAutoscaler	10
deploymentLabels	Labels to be added at 'deployment' level	not set
deploymentAnnotations	Annotations to be added at 'deployment' level	not set
podLabels	Labels to be added at 'pod' level	not set
podAnnotations	Annotations to be added at 'pod' level	not set
metrics.enabled	Start Prometheus metrics exporter	false
metrics.https	Defines if https is used to connect to nextcloud	false (uses http)
metrics.timeout	When the scrape times out	5s
metrics.image.repository	Nextcloud metrics exporter image name	xperimental/nextcloud-exporter
metrics.image.tag	Nextcloud metrics exporter image tag	v0.3.0
metrics.image.pullPolicy	Nextcloud metrics exporter image pull policy	IfNotPresent
metrics.podAnnotations	Additional annotations for metrics exporter	not set
metrics.podLabels	Additional labels for metrics exporter	not set
metrics.service.type	Metrics: Kubernetes Service type	ClusterIP
metrics.service.loadBalancerIP	Metrics: LoadBalancerIp for service type LoadBalancer	nil
metrics.service.nodePort	Metrics: NodePort for service type NodePort	nil
metrics.service.annotations	Additional annotations for service metrics exporter	{prometheus.io/scrape: "true", prometheus.io/port: "9205"}
metrics.service.labels	Additional labels for service metrics exporter	{}

Note:

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

Optionally, you can specify the service.loadBalancerIP parameter to assign a reserved IP address to the nextcloud 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 nextcloud-public-ip

The reserved IP address can be associated to the nextcloud service by specifying it as the value of the service.loadBalancerIP 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 nextcloud.username=admin,nextcloud.password=password,mariadb.auth.rootPassword=secretpassword \
    nextcloud/nextcloud

The above command sets the nextcloud 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 nextcloud/nextcloud

Tip: You can use the default values.yaml

Persistence

The Nextcloud image stores the nextcloud data and configurations at the /var/www/html paths 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 enable persistence and configuration of the PVC.

Cronjob

This chart can utilize Kubernetes CronJob resource to execute background tasks.

To use this functionality, set cronjob.enabled parameter to true and switch background mode to Webcron in your nextcloud settings page. See the Configuration section for further configuration of the cronjob resource.

Note: For the cronjobs to work correctly, ingress must be also enabled (set ingress.enabled to true) and nextcloud.host has to be publicly resolvable.

Multiple config.php file

Nextcloud supports loading configuration parameters from multiple files. You can add arbitrary files ending with .config.php in the config/ directory. See documentation.

For example, following config will configure Nextcloud with S3 as primary storage by creating file /var/www/html/config/s3.config.php:

nextcloud:
  configs:
    s3.config.php: |-
      <?php
      $CONFIG = array (
        'objectstore' => array(
          'class' => '\\OC\\Files\\ObjectStore\\S3',
          'arguments' => array(
            'bucket'     => 'my-bucket',
            'autocreate' => true,
            'key'        => 'xxx',
            'secret'     => 'xxx',
            'region'     => 'us-east-1',
            'use_ssl'    => true
          )
        )
      );

Hugepages

If your node has hugepages enabled, but you do not map any into the container, it could fail to start with a bus error in Apache. This is due to Apache attempting to memory map a file and use hugepages. The fix is to either disable huge pages on the node or map hugepages into the container:

nextcloud:
  extraVolumes:
    - name: hugepages
      emptyDir:
        medium: HugePages-2Mi
  extraVolumeMounts:
    - name: hugepages
      mountPath: /dev/hugepages
  resources:
    requests:
      hugepages-2Mi: 500Mi
      # note that Kubernetes currently requires cpu or memory requests and limits before hugepages are allowed.
      memory: 500Mi
    limits:
      # limit and request must be the same for hugepages. They are a fixed resource.
      hugepages-2Mi: 500Mi
      # note that Kubernetes currently requires cpu or memory requests and limits before hugepages are allowed.
      memory: 1Gi

HPA (Clustering)

If you want to have multiple Nextcloud containers, regardless of dynamic or static sizes, you need to use shared persistence between the containers.

Minimum cluster compatible persistence settings:

persistence:
  enabled: true
  accessMode: ReadWriteMany