Links

Deploy with Kubernetes

Deploy on a kubernetes cluster using our official helm chart.
Using the Helm package manager, the helm chart bootstraps a Rocket.Chat deployment on a Kubernetes cluster. It provisions a fully featured Rocket.Chat installation. Additionally, this chart supports the scaling of Rocket.Chat for increased server capacity and high availability (requires enterprise license).

Prerequisites Details

The chart has an optional dependency on the MongoDB chart. By default, the MongoDB chart requires PV support on underlying infrastructure which may be disabled.

Installing the Chart

Confirm that you have helm3 binary insalled, then add the chart repository with the following command:
helm repo add rocketchat https://rocketchat.github.io/helm-charts
To install the chart ,you can either define your configuration options in a values file or pass the configuration parameters via command line arguments.

Define the configuations value in a file

We recommend defining the configuration parameters inside a Values.yaml file with at least the non-root user's password and the root password before passing it to helm. You must set at least the database and root password in the values file.
mongodb:
auth:
passwords:
- rocketchat
rootPassword: rocketchatroot
Now, install with the following command:
helm install rocketchat -f Values.yaml rocketchat/rocketchat

Set the configurations parameters via command line arguments

Optionally, you can use the --set flag to pass the configuration parameters to helm.
helm install rocketchat rocketchat/rocketchat --set mongodb.auth.passwords={$(echo -n $(openssl rand -base64 32))},mongodb.auth.rootPassword=$(echo -n $(openssl rand -base64 32))
Starting from chart version 5.4.3, username, password, and database entries must be arrays of the same length due to MongoDB dependency. Rocket.Chat will use the first entries of those arrays for its own use. mongodb.auth.usernames array defaults to {rocketchat} and mongodb.auth.databases array defaults to {rocketchat}.

Uninstalling the Chart

To uninstall/delete the rocketchat deployment:
helm delete rocketchat

Configuration

The following table lists the configurable parameters of the Rocket.Chat chart and their default values.
Parameter
Description
Default
image.repository
Image repository
registry.rocket.chat/rocketchat/rocket.chat
image.tag
Image tag
3.18.3
image.pullPolicy
Image pull policy
IfNotPresent
host
Hostname for Rocket.Chat. Also used for ingress (if enabled)
""
replicaCount
Number of replicas to run
1
smtp.enabled
Enable SMTP for sending mails
false
smtp.existingSecret
Use existing secret for SMTP account
""
smtp.username
Username of the SMTP account
""
smtp.password
Password of the SMTP account
""
smtp.host
Hostname of the SMTP server
""
smtp.port
Port of the SMTP server
587
extraEnv
Extra environment variables for Rocket.Chat. Used with tpl function, so this needs to be a string
""
extraVolumes
Extra volumes allowing inclusion of certificates or any sort of file that might be required (see bellow)
[]
extraVolumeMounts
Where the aforementioned extra volumes should be mounted inside the container
[]
podAntiAffinity
Pod anti-affinity can prevent the scheduler from placing RocketChat replicas on the same node. The default value "soft" means that the scheduler should prefer to not schedule two replica pods onto the same node but no guarantee is provided. The value "hard" means that the scheduler is required to not schedule two replica pods onto the same node. The value "" will disable pod anti-affinity so that no anti-affinity rules will be configured.
""
podAntiAffinityTopologyKey
If anti-affinity is enabled sets the topologyKey to use for anti-affinity. This can be changed to, for example failure-domain.beta.kubernetes.io/zone
kubernetes.io/hostname
affinity
Assign custom affinity rules to the RocketChat instance https://kubernetes.io/docs/concepts/configuration/assign-pod-node/
{}
minAvailable
Minimum number / percentage of pods that should remain scheduled
1
existingMongodbSecret
An already existing secret containing MongoDB Connection URL
""
externalMongodbUrl
MongoDB URL if using an externally provisioned MongoDB
""
externalMongodbOplogUrl
MongoDB OpLog URL if using an externally provisioned MongoDB. Required if externalMongodbUrl is set
""
mongodb.enabled
Enable or disable MongoDB dependency. Refer to the stable/mongodb docs for more information
true
persistence.enabled
Enable persistence using a PVC. This is not necessary if you're using the default GridFS file storage
false
persistence.storageClass
Storage class of the PVC to use
""
persistence.accessMode
Access mode of the PVC
ReadWriteOnce
persistence.size
Size of the PVC
8Gi
persistence.existingClaim
An Existing PVC name for rocketchat volume
""
resources
Pod resource requests and limits
{}
securityContext.enabled
Enable security context for the pod
true
securityContext.runAsUser
User to run the pod as
999
securityContext.fsGroup
fs group to use for the pod
999
serviceAccount.create
Specifies whether a ServiceAccount should be created
true
serviceAccount.name
Name of the ServiceAccount to use. If not set and create is true, a name is generated using the fullname template
""
ingress.enabled
If true, an ingress is created
false
ingress.pathType
Sets the value for pathType for the created Ingress resource
Prefix
ingress.annotations
Annotations for the ingress
{}
ingress.path
Path of the ingress
/
ingress.tls
A list of IngressTLS items
[]
license
Contents of the Enterprise License file, if applicable
""
prometheusScraping.enabled
Turn on and off /metrics endpoint for Prometheus scraping
false
prometheusScraping.port
Port to use for the metrics for Prometheus to scrap on
9458
serviceMonitor.enabled
Create ServiceMonitor resource(s) for scraping metrics using PrometheusOperator (prometheusScraping should be enabled)
false
serviceMonitor.interval
The interval at which metrics should be scraped
30s
serviceMonitor.port
The port name at which container exposes Prometheus metrics
metrics
livenessProbe.enabled
Turn on and off liveness probe
true
livenessProbe.initialDelaySeconds
Delay before liveness probe is initiated
60
livenessProbe.periodSeconds
How often to perform the probe
15
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
microservices.enabled
Use microservices architecture
false
microservices.presence.replicas
Number of replicas to run for the given service
1
microservices.ddpStreamer.replicas
Idem
1
microservices.streamHub.replicas
Idem
1
microservices.accounts.replicas
Idem
1
microservices.authorization.replicas
Idem
1
microservices.nats.replicas
Idem
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
15
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
registrationToken
Registration Token for Rocket.Chat Cloud
""
service.annotations
Annotations for the Rocket.Chat service
{}
service.labels
Additional labels for the Rocket.Chat service
{}
service.type
The service type to use
ClusterIP
service.port
The service port
80
service.nodePort
The node port used if the service is of type NodePort
""
podDisruptionBudget.enabled
Enable or disable PDB for RC deployment
true
podLabels
Additional pod labels for the Rocket.Chat pods
{}
podAnnotations
Additional pod annotations for the Rocket.Chat pods
{}
Specify each parameter using the --set key=value[,key=value] argument to helm install. Alternatively, you can update the YAML file that specifies the values for the parameters to be provided while installing the chart.

Database Setup

Rocket.Chat uses a MongoDB instance to presist its data. By default, the MongoDB chart is deployed, and a single MongoDB instance is created as the primary in a replicaset. Please refer to this chart for additional MongoDB configuration options. If you are using chart defaults, set the mongodb.auth.rootPassword and mongodb.auth.passwords.

Using an External Database

This chart supports using an existing MongoDB instance. Use the configuration options and disable the chart's MongoDB with --set mongodb.enabled=false

Configuring Additional Environment Variables

extraEnv: |
- name: MONGO_OPTIONS
value: '{"ssl": "true"}'

Specifying aditional volumes

Sometimes, it's necessary to include extra sets of files by means of exposing them to the container as a mountpoint. The most common use case is the inclusion of SSL CA certificates.
extraVolumes:
- name: etc-certs
hostPath:
- path: /etc/ssl/certs
type: Directory
extraVolumeMounts:
- mountPath: /etc/ssl/certs
name: etc-certs
readOnly: true

Increasing Server Capacity and HA Setup

To increase the server's capacity, you can increase the number of Rocket.Chat server instances across available computing resources in your cluster. For example,
kubectl scale --replicas=3 deployment/rocketchat
By default, the chart creates one MongoDB instance as a Primary in a replicaset. You can also scale up the capacity and availability of the MongoDB cluster independently.
See MongoDB chart for configuration information. To learn more on running Rocket.Chat in scaled configurations, visit the Configure MongoDB Replicaset guide.

Manage MongoDB secrets

The chart provides several ways to manage the connection for MongoDB apart from the primary mongodb.auth values. They include:
  • Values passed to the chart (externalMongodbUrl, externalMongodbOplogUrl)
  • An ExistingMongodbSecret containing the MongoURL and MongoOplogURL
apiVersion: v1
kind: Secret
metadata:
name: my-secret
type: Opaque
data:
mongo-uri: mongodb://user:password@localhost:27017/rocketchat
mongo-oplog-uri: mongodb://user:password@localhost:27017/local?replicaSet=rs0&authSource=admin

Upgrading

To 5.4.3

Due to changes on the upstream MongoDB chart, some deprecated variables have been renamed, which changed how this chart generates its manifests. Here are the values that need updates:
  • mongodb.auth.username is no longer supported and has been changed to mongodb.auth.usernames array. If you set it to something custom (defaults to rocketchat), make sure you update it to an array, and the entry is the first entry in that array, as that's what Rocket.Chat will use to connect to the database.
  • mongodb.auth.password is no longer supported and has been changed to mongodb.auth.passwords array. Update your values file to make it an array, and ensure it's the first entry of that array.
  • mongodb.auth.database is no longer supported and has been changed to mongodb.auth.databases. Update your values file, convert it to an array, and ensure it's the first entry of that array.
  • mongodb.auth.rootUsername and mongodb.auth.rootPassword remain the same.
usernames, passwords and databases arrays must be of the same length. Rocket.Chat chart will use the first entry for its mongodb connection string in MONGO_URL and MONGO_OPLOG_URL.
The used image tag gets updated in most cases on each chart update. The same is true for the MongoDB chart we use as our dependency. Before version 5.4.3, we used the chart version 10.x.x. Starting from 5.4.3, the dependency chart version has been updated to the latest available version, 13.x.x. This chart defaults to MongoDB 6.0.x at the moment.
As a warning, this chart will not handle MongoDB upgrades and will depend on the user to ensure the supprted version is runnning.
The upgrade will fail if any of the following requirements are not met :
  • Must not skip a MongoDB release. For example, 4.2.x to 5.0.x will fail.
  • Current featureCompatibilityVersion must be compatible with the version the user is trying to upgrade to. For example—if the current database version and feature compatibility is 4.4 and 4.2, respectively, but the user is trying to upgrade to 5.0, it'll fail.
The chart will not check if the mongodb version is supported by the Rocket.Chat version considering deployments that might occur in an airgapped environment. You can check the release notes to confirm that.
To get the currently deployed MongoDB version, the easiest method is to get into the mongo shell and run db.version(). You are advised to pin your MongoDB dependency in the values file.
mongodb:
image:
tag: # find from https://hub.docker.com/r/bitnami/mongodb/tags
To learn more about the Rocket.Chat helm chart, visit the Github repository.

References