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Helm chart for Vaultwarden

MIT Licensed Helm Release

Vaultwarden, formerly known as Bitwarden_RS, is an "alternative implementation of the Bitwarden server API written in Rust and compatible with upstream Bitwarden clients, perfect for self-hosted deployment where running the official resource-heavy service might not be ideal."

TL;DR

git clone https://github.com/guerzon/vaultwarden
cd vaultwarden
helm install my-vaultwarden-release .

Description

Short intro

In 2020, I built a simple project for deploying Bitwarden_RS to Kubernetes, which can be found here. That project is made up of various YAML files which have to be edited manually when adding required customizations.

The aim of this project is to deploy vaultwarden with a stable configuration to Kubernetes clusters using Helm.

The upstream repository for the vaultwarden project can be found here.

To learn more about Vaultwarden, please visit the wiki.

Prerequisites

  • Kubernetes 1.12+
  • Helm 3.1.0

Usage

To deploy the chart with the release name vaultwarden-release:

export NAMESPACE=vaultwarden
export DOMAIN_NAME=pass.company.com
helm install vaultwarden-release . \
  --namespace $NAMESPACE \
  --set "ingress.enabled=true" \
  --set "ingress.hostname=$DOMAIN_NAME"

To deploy the chart to another namespace using custom values in the file demo.yaml:

export NAMESPACE=vaultwarden-demo
export RELEASE_NAME=vaultwarden-demo
helm upgrade -i \
  -n $NAMESPACE $RELEASE_NAME . \
  -f demo.yaml

General configuration

This chart deploys vaultwarden from pre-built images on Docker Hub: vaultwarden/server. The image can be defined by specifying the tag with image.tag.

Example that uses the Alpine-based image 1.24.0-alpine and an existing secret that contains registry credentials:

image:
  tag: "1.24.0-alpine"
  pullSecrets:
    - myRegKey

Important: specify the URL used by users with the domain variable, otherwise, some functionalities might not work:

domain: "https://vaultwarden.contoso.com:9443/"

Detailed configuration options can be found in the Vaultwarden settings section below.

Database options

By default, vaultwarden uses a SQLite database located in /data/db.sqlite3. However, it is also possible to make use of an external database, in particular either MySQL or PostgreSQL.

To configure an external database, set database.type to either mysql or postgresql and specify the datase connection information.

Example for using an external MySQL database:

database:
  type: mysql
  host: database.contoso.eu
  username: appuser
  password: apppassword
  dbName: prodapp

You can also specify the connection string:

database:
  type: postgresql
  uriOverride: "postgresql://appuser:[email protected]:5433/qualdb"

Detailed configuration options can be found in the Database Configuration section below.

SSL and Ingress

This chart supports the usage of existing Ingress Controllers for exposing the vaultwarden deployment.

nginx-ingress

Nginx ingress controller can be installed by following this guide. An SSL certificate can be added as a secret with a few commands:

cd <dir-containing-the-certs>
kubectl create secret -n vaultwarden \
  tls vw-constoso-com-crt \
  --key privkey.pem \
  --cert fullchain.pem

Once both prerequisites are ready, values can be set as follows:

ingress:
  enabled: true
  class: "nginx"
  tlsSecret: vw-constoso-com-crt
  hostname: vaultwarden.contoso.com
  allowList: "10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16"

AWS LB Controller

When using AWS, the AWS Load Balancer controller can be used together with ACM.

Example for AWS:

ingress:
  enabled: true
  class: "alb"
  hostname: vaultwarden.contoso.com
  additionalAnnotations:
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/tags: Environment=dev,Team=test
    alb.ingress.kubernetes.io/certificate-arn: "arn:aws:acm:eu-central-1:ACCOUNT:certificate/LONGID"

Detailed configuration options can be found in the Exposure Parameters section below.

Security

An admin token can be generated with: openssl rand -base64 48.

Detailed configuration options can be found in the Security Settings section below.

By default, the chart deploys a service account called vaultwarden-svc.

serviceAccount:
  create: true
  name: "vaultwarden-svc"

Detailed configuration options can be found in the Security settings section below.

Mail settings

To enable the SMTP service, make sure that at a minimum, smtp.host and smtp.from are set.

smtp:
  host: mx01.contoso.com
  from: [email protected]
  fromName: "Vault Administrator"
  username: admin
  password: password
  acceptInvalidHostnames: "true"
  acceptInvalidCerts: "true"

Detailed configuration options can be found in the SMTP Configuration section below.

Storage

To use persistent storage using a claim, set storage.enabled to true. The following example sets the storage class to an already-installed Rancher's local path storage provisioner.

storage:
  enabled: true
  size: "10Gi"
  class: "local-path"

Example for AWS:

storage:
  enabled: true
  size: "10Gi"
  class: "gp2"

Detailed configuration options can be found in the Storage Configuration section below.

Parameters

Vaultwarden settings

Name Description Value
image.registry Vaultwarden image registry docker.io
image.repository Vaultwarden image repository vaultwarden/server
image.tag Vaultwarden image tag 1.24.0
image.pullPolicy Vaultwarden image pull policy IfNotPresent
image.pullSecrets Specify docker-registry secret names []
domain Domain name where the application is accessed ""
websocket.enabled Enable websocket notifications true
websocket.address Websocket listen address 0.0.0.0
websocket.port Websocket listen port 3012
rocket.port Rocket port 8080
rocket.workers Rocket number of workers 10
webVaultEnabled Enable Web Vault true

Security settings

Name Description Value
adminToken The admin token used for /admin R@ndomToken$tring
signupDomains List of domain names for users allowed to register contoso.com
signupsVerify Whether to require account verification for newly-registered users. true
showPassHint Whether a password hint should be shown in the page. false
fullnameOverride String to override the application name. ""
serviceAccount.create Create a service account true
serviceAccount.name Name of the service account to create vaultwarden-svc

Exposure Parameters

Name Description Value
ingress.enabled Deploy an ingress resource. false
ingress.class Ingress resource class nginx
ingress.nginxIngressAnnotations Add nginx specific ingress annotations true
ingress.additionalAnnotations Additional annotations for the ingress resource. {}
ingress.tls Enable TLS on the ingress resource. true
ingress.hostname Hostname for the ingress. warden.contoso.com
ingress.path Default application path for the ingress /
ingress.pathWs Path for the websocket ingress /notifications/hub
ingress.pathType Path type for the ingress ImplementationSpecific
ingress.pathTypeWs Path type for the ingress ImplementationSpecific
ingress.tlsSecret Kubernetes secret containing the SSL certificate when using the "nginx" class. ""
ingress.nginxAllowList Comma-separated list of IP addresses and subnets to allow. ""
service.type Service type ClusterIP
service.annotations Additional annotations for the vaultwarden service {}

Database Configuration

Name Description Value
database.type Database type, either mysql or postgresql default
database.host Database hostname or IP address ""
database.port Database port ""
database.username Database username ""
database.password Database password ""
database.dbName Database name ""
database.uriOverride Manually specify the DB connection string ""

SMTP Configuration

Name Description Value
smtp.host SMTP host ""
smtp.security SMTP Encryption method starttls
smtp.port SMTP port 25
smtp.from SMTP sender email address ""
smtp.fromName SMTP sender FROM ""
smtp.username Username for the SMTP authentication. ""
smtp.password Password for the SMTP service. ""
smtp.authMechanism SMTP authentication mechanism Plain
smtp.acceptInvalidHostnames Accept Invalid Hostnames false
smtp.acceptInvalidCerts Accept Invalid Certificates false
smtp.debug SMTP debugging false

Storage Configuration

Name Description Value
storage.enabled Enable configuration for persistent storage false
storage.size Storage size for /data 15Gi
storage.class Specify the storage class default
storage.dataDir Specify the data directory /data

Extra containers Configuration

Name Description Value
initContainers extra init containers for initializing the vaultwarden instance []
sidecars extra containers running alongside the vaultwarden instance []

Uninstall

To uninstall/delete the vaultwarden-demo release:

export NAMESPACE=vaultwarden
export RELEASE_NAME=vaultwarden-demo
helm -n $NAMESPACE uninstall $RELEASE_NAME

Notes

I initially built this Helm chart for the purposes of learning Helm chart development, brush up on my Kubernetes skills, and in general, learn how to better manage application releases in Kubernetes.

Thus, I have to mention that this chart has to be tested more thoroughly before it is used in a production environment.

Nevertheless, if you find any issues while using this chart, or have any suggestions, I would appreciate it if you would submit an issue.

Todo

  1. Implement more configuration options.
  2. Prometheus metrics scraping would be nice to have.
  3. Automated testing, CI

License

MIT.

Author

This Helm chart was created and is being maintained by Lester Guerzon.

Credits

  • The vaultwarden project can be found here
  • Further information about Bitwarden and 8bit Solutions LLC can be found here