Database Setup

Overview

Bitwarden Server requires a SQL database to store user data, vault items, organizations, and system configuration. The database is shared across all services.

Supported Databases

SQL Server

Recommended - SQL Server 2017+Microsoft’s enterprise database. Best performance and full feature support.

PostgreSQL

PostgreSQL 12+Open-source alternative with excellent performance.

MySQL / MariaDB

MySQL 8.0+ / MariaDB 10.5+Widely available open-source databases.

Production Recommendation: Use SQL Server 2022 or PostgreSQL 14+ for best performance and reliability.

Quick Start with Docker

SQL Server

# Start SQL Server container
docker run -d \
  --name bitwarden-mssql \
  -e "ACCEPT_EULA=Y" \
  -e "MSSQL_SA_PASSWORD=YourStrongPassword123!" \
  -e "MSSQL_PID=Developer" \
  -p 1433:1433 \
  -v mssql_data:/var/opt/mssql \
  mcr.microsoft.com/mssql/server:2022-latest

# Wait for SQL Server to start
sleep 30

# Create database
docker exec bitwarden-mssql /opt/mssql-tools/bin/sqlcmd \
  -S localhost -U sa -P "YourStrongPassword123!" \
  -Q "CREATE DATABASE vault; ALTER DATABASE vault SET RECOVERY SIMPLE;"

PostgreSQL

# Start PostgreSQL container
docker run -d \
  --name bitwarden-postgres \
  -e "POSTGRES_DB=vault" \
  -e "POSTGRES_USER=postgres" \
  -e "POSTGRES_PASSWORD=YourStrongPassword123!" \
  -p 5432:5432 \
  -v postgres_data:/var/lib/postgresql/data \
  postgres:14

MySQL

# Start MySQL container
docker run -d \
  --name bitwarden-mysql \
  -e "MYSQL_ROOT_PASSWORD=YourStrongPassword123!" \
  -e "MYSQL_DATABASE=vault" \
  -p 3306:3306 \
  -v mysql_data:/var/lib/mysql \
  mysql:8.0 \
  --default-authentication-plugin=mysql_native_password

Connection Strings

SQL Server

"globalSettings": {
  "sqlServer": {
    "connectionString": "Server=localhost;Database=vault;User Id=sa;Password=YourPassword;TrustServerCertificate=True;Encrypt=True;"
  }
}

Connection String Parameters:

Server - Hostname or IP address
Database - Database name (default: vault)
User Id - Database user
Password - Database password
TrustServerCertificate=True - Accept self-signed certificates (dev only)
Encrypt=True - Enable encryption (recommended)
MultipleActiveResultSets=True - Enable MARS (optional)

PostgreSQL

"globalSettings": {
  "sqlServer": {
    "connectionString": "Host=localhost;Port=5432;Database=vault;Username=postgres;Password=YourPassword;SSL Mode=Prefer;"
  }
}

Connection String Parameters:

Host - Hostname or IP address
Port - Port number (default: 5432)
Database - Database name
Username - Database user
Password - Database password
SSL Mode - Disable, Prefer, or Require

MySQL

"globalSettings": {
  "sqlServer": {
    "connectionString": "Server=localhost;Port=3306;Database=vault;Uid=root;Pwd=YourPassword;SslMode=Preferred;"
  }
}

Connection String Parameters:

Server - Hostname or IP address
Port - Port number (default: 3306)
Database - Database name
Uid - Database user
Pwd - Database password
SslMode - None, Preferred, or Required

Password Requirements: SQL Server requires passwords with:

At least 8 characters
At least one uppercase letter
At least one lowercase letter
At least one number
At least one special character

Database Migrations

Bitwarden uses database migrations to create and update the schema. Migrations must be run before starting services.

Using Migrator Utility

The recommended way to run migrations:

# SQL Server
docker run --rm \
  -e "globalSettings__sqlServer__connectionString=Server=mssql;Database=vault;User Id=sa;Password=YourPassword;TrustServerCertificate=True;" \
  --network bitwarden_default \
  ghcr.io/bitwarden/mssqlmigratorutility:latest

# PostgreSQL
docker run --rm \
  -e "globalSettings__sqlServer__connectionString=Host=postgres;Database=vault;Username=postgres;Password=YourPassword;" \
  -e "globalSettings__databaseProvider=postgres" \
  --network bitwarden_default \
  ghcr.io/bitwarden/postgresmigratorutility:latest

# MySQL
docker run --rm \
  -e "globalSettings__sqlServer__connectionString=Server=mysql;Database=vault;Uid=root;Pwd=YourPassword;" \
  -e "globalSettings__databaseProvider=mysql" \
  --network bitwarden_default \
  ghcr.io/bitwarden/mysqlmigratorutility:latest

The --network flag ensures the migrator can reach the database container. Adjust the network name based on your Docker Compose project.

Manual Migrations

For non-Docker deployments, run the migrator utility directly:

# Download migrator utility
cd /opt/bitwarden
git clone https://github.com/bitwarden/server.git
cd server/util/MsSqlMigratorUtility

# Build and run
dotnet run -- \
  --connection "Server=localhost;Database=vault;User Id=sa;Password=YourPassword;"

Hosted Service Migrations

Services can automatically run migrations on startup:

appsettings.json

{
  "globalSettings": {
    "runDatabaseMigrationsOnStartup": true
  }
}

Production Warning: Automatic migrations on startup can cause race conditions when multiple instances start simultaneously. Use the migrator utility instead.

Database Schema

The Bitwarden database contains these primary tables:

User & Authentication

User - User accounts and profiles
Device - Registered devices per user
AuthRequest - Passwordless authentication requests
SsoUser - SSO user mappings
U2f - FIDO2/WebAuthn credentials

Vault Data

Cipher - Vault items (logins, cards, notes, etc.)
Folder - User folders
Collection - Organization collections
CollectionCipher - Collection-cipher relationships
Send - Temporary secret sharing

Organizations

Organization - Organization accounts
OrganizationUser - User-organization memberships
Group - Organization groups
GroupUser - Group memberships
Policy - Organization policies

Events & Audit

Event - Audit log events
EventSystemUser - System-generated events
SsoConfig - SSO configuration
OrganizationApiKey - API keys

System

Installation - Installation identifiers
Grant - OAuth 2.0 grants (IdentityServer)
Transaction - Payment transactions

Performance Optimization

Indexes

Bitwarden migrations create optimal indexes automatically. Key indexes:

Cipher.UserId - User vault queries
Cipher.OrganizationId - Organization vault queries
Event.Date - Event log queries
CollectionCipher.CipherId and CollectionCipher.CollectionId - Collection relationships

SQL Server Recommendations

-- Set recovery model to SIMPLE for smaller logs (non-production)
ALTER DATABASE vault SET RECOVERY SIMPLE;

-- Update statistics
EXEC sp_updatestats;

-- Check index fragmentation
SELECT 
    OBJECT_NAME(ips.object_id) AS TableName,
    ips.index_id,
    avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, 'LIMITED') ips
WHERE avg_fragmentation_in_percent > 30;

PostgreSQL Recommendations

-- Vacuum and analyze
VACUUM ANALYZE;

-- Update statistics
ANALYZE;

-- Check table sizes
SELECT 
    schemaname,
    tablename,
    pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) AS size
FROM pg_tables
WHERE schemaname = 'public'
ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC;

Connection Pooling

Enable connection pooling for better performance: SQL Server:

Server=localhost;Database=vault;User Id=sa;Password=pass;Pooling=true;Min Pool Size=5;Max Pool Size=100;

PostgreSQL:

Host=localhost;Database=vault;Username=postgres;Password=pass;Pooling=true;Minimum Pool Size=5;Maximum Pool Size=100;

Backup and Restore

SQL Server Backup

# Create backup
docker exec bitwarden-mssql /opt/mssql-tools/bin/sqlcmd \
  -S localhost -U sa -P "YourPassword" \
  -Q "BACKUP DATABASE vault TO DISK='/var/opt/mssql/backup/vault_$(date +%Y%m%d).bak' WITH COMPRESSION;"

# Copy backup from container
docker cp bitwarden-mssql:/var/opt/mssql/backup/vault_20240101.bak ./

# Restore backup
docker exec bitwarden-mssql /opt/mssql-tools/bin/sqlcmd \
  -S localhost -U sa -P "YourPassword" \
  -Q "RESTORE DATABASE vault FROM DISK='/var/opt/mssql/backup/vault_20240101.bak' WITH REPLACE;"

PostgreSQL Backup

# Create backup
docker exec bitwarden-postgres pg_dump -U postgres vault > vault_backup.sql

# Restore backup
docker exec -i bitwarden-postgres psql -U postgres vault < vault_backup.sql

MySQL Backup

# Create backup
docker exec bitwarden-mysql mysqldump -u root -p"YourPassword" vault > vault_backup.sql

# Restore backup
docker exec -i bitwarden-mysql mysql -u root -p"YourPassword" vault < vault_backup.sql

Automation: Set up automated daily backups using cron jobs or container orchestration tools.

Read Replicas

For high-traffic deployments, configure read replicas:

appsettings.json

{
  "globalSettings": {
    "sqlServer": {
      "connectionString": "Server=primary.db.local;Database=vault;User Id=sa;Password=pass;",
      "readOnlyConnectionString": "Server=replica.db.local;Database=vault;User Id=sa;Password=pass;ApplicationIntent=ReadOnly;"
    }
  }
}

Read operations (vault sync, searches) will use the replica automatically.

Troubleshooting

Cannot connect to database

Symptoms: Services fail to start with connection errorsSolutions:

Verify database is running: docker ps
Check connection string credentials
Ensure database port is accessible
Test connection: telnet localhost 1433
Check firewall rules

Password policy errors (SQL Server)

Symptoms: Password validation failedSolutions:

Use a strong password with uppercase, lowercase, numbers, and symbols
Minimum 8 characters
Example: MyStr0ng!Pass

Migrations fail

Symptoms: Migration errors during startupSolutions:

Run migrations manually using migrator utility
Check database user has CREATE TABLE permissions
Verify connection string is correct
Review migration logs for specific errors

Performance issues

Symptoms: Slow queries, timeoutsSolutions:

Check database resource usage (CPU, memory, disk)
Review slow query logs
Update statistics: EXEC sp_updatestats
Consider adding read replicas
Increase connection pool size

Security Best Practices

Use Strong Passwords

Generate random passwords with at least 20 characters for database users.

Restrict Network Access

Only allow connections from application servers. Use firewall rules or security groups.

Enable Encryption

Use TLS/SSL for database connections in production.

Regular Backups

Automate daily backups and test restore procedures regularly.

Monitor Access

Enable audit logging for database access and review logs regularly.

Principle of Least Privilege

Grant minimal required permissions to application database users.

Next Steps

Configuration

Configure connection strings in appsettings.json

Docker Deployment

Deploy services with Docker Compose

Backup & Restore

Set up automated backups

Monitoring

Monitor database performance

Getting Started

Deployment

Overview

Supported Databases

SQL Server

PostgreSQL

MySQL / MariaDB

Quick Start with Docker

SQL Server

PostgreSQL

MySQL

Connection Strings

SQL Server

PostgreSQL

MySQL

Database Migrations

Using Migrator Utility

Manual Migrations

Hosted Service Migrations

Database Schema

Performance Optimization

Indexes

SQL Server Recommendations

PostgreSQL Recommendations

Connection Pooling

Backup and Restore

SQL Server Backup

PostgreSQL Backup

MySQL Backup

Read Replicas

Troubleshooting

Security Best Practices

Next Steps

Configuration

Docker Deployment

Backup & Restore

Monitoring

Build docs developers (and LLMs) love

Getting Started

Deployment

​Overview

​Supported Databases

SQL Server

PostgreSQL

MySQL / MariaDB

​Quick Start with Docker

​SQL Server

​PostgreSQL

​MySQL

​Connection Strings

​SQL Server

​PostgreSQL

​MySQL

​Database Migrations

​Using Migrator Utility

​Manual Migrations

​Hosted Service Migrations

​Database Schema

​Performance Optimization

​Indexes

​SQL Server Recommendations

​PostgreSQL Recommendations

​Connection Pooling

​Backup and Restore

​SQL Server Backup

​PostgreSQL Backup

​MySQL Backup

​Read Replicas

​Troubleshooting

​Security Best Practices

​Next Steps

Configuration

Docker Deployment

Backup & Restore

Monitoring

Build docs developers (and LLMs) love

Overview

Supported Databases

Quick Start with Docker

SQL Server

PostgreSQL

MySQL

Connection Strings

SQL Server

PostgreSQL

MySQL

Database Migrations

Using Migrator Utility

Manual Migrations

Hosted Service Migrations

Database Schema

Performance Optimization

Indexes

SQL Server Recommendations

PostgreSQL Recommendations

Connection Pooling

Backup and Restore

SQL Server Backup

PostgreSQL Backup

MySQL Backup

Read Replicas

Troubleshooting

Security Best Practices

Next Steps