2024-08-03 16:03:17 +02:00
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---
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title: Configuration Reference
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layout: default
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2025-01-13 14:40:46 +01:00
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nav_order: 3
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2024-08-03 16:03:17 +02:00
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---
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2025-01-13 14:40:46 +01:00
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# Configuration Reference
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Backup, restore, and migration targets, schedules, and retention policies are configured using **environment variables** or **CLI flags**.
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---
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2025-01-13 14:40:46 +01:00
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## CLI Utility Usage
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| Option | Short Flag | Description |
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|-------------------------|------------|-------------------------------------------------------------------------------|
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| `pg-bkup` | `bkup` | CLI utility for managing PostgreSQL backups. |
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| `backup` | | Perform a backup operation. |
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| `restore` | | Perform a restore operation. |
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| `migrate` | | Migrate a database from one instance to another. |
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| `--storage` | `-s` | Storage type (`local`, `s3`, `ssh`, etc.). Default: `local`. |
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| `--file` | `-f` | File name for restoration. |
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| `--path` | | Path for storage (e.g., `/custom_path` for S3 or `/home/foo/backup` for SSH). |
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| `--config` | `-c` | Configuration file for multi database backup. (e.g: `/backup/config.yaml`). |
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| `--dbname` | `-d` | Database name. |
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| `--port` | `-p` | Database port. Default: `3306`. |
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| `--disable-compression` | | Disable compression for database backups. |
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| `--cron-expression` | `-e` | Cron expression for scheduled backups (e.g., `0 0 * * *` or `@daily`). |
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| `--help` | `-h` | Display help message and exit. |
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| `--version` | `-V` | Display version information and exit. |
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---
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## Environment Variables
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| Name | Requirement | Description |
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|--------------------------------|--------------------------------------|----------------------------------------------------------------------------|
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| `DB_PORT` | Optional (default: `3306`) | Database port number. |
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| `DB_HOST` | Required | Database host. |
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| `DB_NAME` | Optional (if provided via `-d` flag) | Database name. |
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| `DB_USERNAME` | Required | Database username. |
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| `DB_PASSWORD` | Required | Database password. |
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| `AWS_ACCESS_KEY` | Required for S3 storage | AWS S3 Access Key. |
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| `AWS_SECRET_KEY` | Required for S3 storage | AWS S3 Secret Key. |
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| `AWS_BUCKET_NAME` | Required for S3 storage | AWS S3 Bucket Name. |
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| `AWS_REGION` | Required for S3 storage | AWS Region. |
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| `AWS_DISABLE_SSL` | Optional | Disable SSL for S3 storage. |
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| `AWS_FORCE_PATH_STYLE` | Optional | Force path-style access for S3 storage. |
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| `FILE_NAME` | Optional (if provided via `--file`) | File name for restoration (e.g., `.sql`, `.sql.gz`). |
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| `GPG_PASSPHRASE` | Optional | GPG passphrase for encrypting/decrypting backups. |
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| `GPG_PUBLIC_KEY` | Optional | GPG public key for encrypting backups (e.g., `/config/public_key.asc`). |
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| `BACKUP_CRON_EXPRESSION` | Optional (flag `-e`) | Cron expression for scheduled backups. |
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| `BACKUP_RETENTION_DAYS` | Optional | Delete backups older than the specified number of days. |
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| `BACKUP_CONFIG_FILE` | Optional (flag `-c`) | Configuration file for multi database backup. (e.g: `/backup/config.yaml`) |
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| `SSH_HOST` | Required for SSH storage | SSH remote hostname or IP. |
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| `SSH_USER` | Required for SSH storage | SSH remote username. |
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| `SSH_PASSWORD` | Optional | SSH remote user's password. |
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| `SSH_IDENTIFY_FILE` | Optional | SSH remote user's private key. |
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| `SSH_PORT` | Optional (default: `22`) | SSH remote server port. |
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| `REMOTE_PATH` | Required for SSH/FTP storage | Remote path (e.g., `/home/toto/backup`). |
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| `FTP_HOST` | Required for FTP storage | FTP hostname. |
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| `FTP_PORT` | Optional (default: `21`) | FTP server port. |
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| `FTP_USER` | Required for FTP storage | FTP username. |
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| `FTP_PASSWORD` | Required for FTP storage | FTP user password. |
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| `TARGET_DB_HOST` | Required for migration | Target database host. |
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| `TARGET_DB_PORT` | Optional (default: `5432`) | Target database port. |
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| `TARGET_DB_NAME` | Required for migration | Target database name. |
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| `TARGET_DB_USERNAME` | Required for migration | Target database username. |
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| `TARGET_DB_PASSWORD` | Required for migration | Target database password. |
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| `TARGET_DB_URL` | Optional | Target database URL in JDBC URI format. |
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| `TG_TOKEN` | Required for Telegram notifications | Telegram token (`BOT-ID:BOT-TOKEN`). |
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| `TG_CHAT_ID` | Required for Telegram notifications | Telegram Chat ID. |
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| `TZ` | Optional | Time zone for scheduling. |
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| `AZURE_STORAGE_CONTAINER_NAME` | Required for Azure Blob Storage | Azure storage container name. |
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| `AZURE_STORAGE_ACCOUNT_NAME` | Required for Azure Blob Storage | Azure storage account name. |
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| `AZURE_STORAGE_ACCOUNT_KEY` | Required for Azure Blob Storage | Azure storage account key. |
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---
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## Scheduled Backups
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### Running in Scheduled Mode
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- **Docker**: Use the `--cron-expression` flag or the `BACKUP_CRON_EXPRESSION` environment variable to schedule backups.
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- **Kubernetes**: Use a `CronJob` resource for scheduled backups.
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### Cron Syntax
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The cron syntax consists of five fields:
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```conf
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* * * * * command
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```
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| Field | Description | Values |
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|---------------|------------------------------|----------------|
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| Minute | Minute of the hour | `0-59` |
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| Hour | Hour of the day | `0-23` |
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| Day of Month | Day of the month | `1-31` |
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| Month | Month of the year | `1-12` |
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| Day of Week | Day of the week (0 = Sunday) | `0-7` |
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#### Examples
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- **Every 30 minutes**: `*/30 * * * *`
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- **Every hour at minute 0**: `0 * * * *`
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- **Every day at 1:00 AM**: `0 1 * * *`
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### Predefined Schedules
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| Entry | Description | Equivalent To |
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| `@yearly` (or `@annually`) | Run once a year, midnight, Jan. 1st | `0 0 1 1 *` |
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| `@monthly` | Run once a month, midnight, first of month | `0 0 1 * *` |
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| `@weekly` | Run once a week, midnight between Sat/Sun | `0 0 * * 0` |
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| `@daily` (or `@midnight`) | Run once a day, midnight | `0 0 * * *` |
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| `@hourly` | Run once an hour, beginning of hour | `0 * * * *` |
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### Intervals
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You can also schedule backups at fixed intervals using the format:
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```conf
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@every <duration>
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```
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- Example: `@every 1h30m10s` runs the backup every 1 hour, 30 minutes, and 10 seconds.
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