mysql-bkup/docs/reference/index.md

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Configuration Reference	default	3

Configuration Reference

Backup, restore, and migration targets, schedules, and retention policies are configured using environment variables or CLI flags.

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CLI Utility Usage

Option	Short Flag	Description
pg-bkup	bkup	CLI utility for managing PostgreSQL backups.
backup		Perform a backup operation.
restore		Perform a restore operation.
migrate		Migrate a database from one instance to another.
--storage	-s	Storage type (local, s3, ssh, etc.). Default: local.
--file	-f	File name for restoration.
--path		Path for storage (e.g., /custom_path for S3 or /home/foo/backup for SSH).
--config	-c	Configuration file for multi database backup. (e.g: /backup/config.yaml).
--dbname	-d	Database name.
--port	-p	Database port. Default: 3306.
--disable-compression		Disable compression for database backups.
--cron-expression	-e	Cron expression for scheduled backups (e.g., 0 0 * * * or @daily).
--help	-h	Display help message and exit.
--version	-V	Display version information and exit.

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Environment Variables

Name	Requirement	Description
DB_PORT	Optional (default: 3306)	Database port number.
DB_HOST	Required	Database host.
DB_NAME	Optional (if provided via -d flag)	Database name.
DB_USERNAME	Required	Database username.
DB_PASSWORD	Required	Database password.
AWS_ACCESS_KEY	Required for S3 storage	AWS S3 Access Key.
AWS_SECRET_KEY	Required for S3 storage	AWS S3 Secret Key.
AWS_BUCKET_NAME	Required for S3 storage	AWS S3 Bucket Name.
AWS_REGION	Required for S3 storage	AWS Region.
AWS_DISABLE_SSL	Optional	Disable SSL for S3 storage.
AWS_FORCE_PATH_STYLE	Optional	Force path-style access for S3 storage.
FILE_NAME	Optional (if provided via --file)	File name for restoration (e.g., .sql, .sql.gz).
GPG_PASSPHRASE	Optional	GPG passphrase for encrypting/decrypting backups.
GPG_PUBLIC_KEY	Optional	GPG public key for encrypting backups (e.g., /config/public_key.asc).
BACKUP_CRON_EXPRESSION	Optional (flag -e)	Cron expression for scheduled backups.
BACKUP_RETENTION_DAYS	Optional	Delete backups older than the specified number of days.
BACKUP_CONFIG_FILE	Optional (flag -c)	Configuration file for multi database backup. (e.g: /backup/config.yaml)
SSH_HOST	Required for SSH storage	SSH remote hostname or IP.
SSH_USER	Required for SSH storage	SSH remote username.
SSH_PASSWORD	Optional	SSH remote user's password.
SSH_IDENTIFY_FILE	Optional	SSH remote user's private key.
SSH_PORT	Optional (default: 22)	SSH remote server port.
REMOTE_PATH	Required for SSH/FTP storage	Remote path (e.g., /home/toto/backup).
FTP_HOST	Required for FTP storage	FTP hostname.
FTP_PORT	Optional (default: 21)	FTP server port.
FTP_USER	Required for FTP storage	FTP username.
FTP_PASSWORD	Required for FTP storage	FTP user password.
TARGET_DB_HOST	Required for migration	Target database host.
TARGET_DB_PORT	Optional (default: 5432)	Target database port.
TARGET_DB_NAME	Required for migration	Target database name.
TARGET_DB_USERNAME	Required for migration	Target database username.
TARGET_DB_PASSWORD	Required for migration	Target database password.
TARGET_DB_URL	Optional	Target database URL in JDBC URI format.
TG_TOKEN	Required for Telegram notifications	Telegram token (BOT-ID:BOT-TOKEN).
TG_CHAT_ID	Required for Telegram notifications	Telegram Chat ID.
TZ	Optional	Time zone for scheduling.
AZURE_STORAGE_CONTAINER_NAME	Required for Azure Blob Storage	Azure storage container name.
AZURE_STORAGE_ACCOUNT_NAME	Required for Azure Blob Storage	Azure storage account name.
AZURE_STORAGE_ACCOUNT_KEY	Required for Azure Blob Storage	Azure storage account key.

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Scheduled Backups

Running in Scheduled Mode

• Docker: Use the --cron-expression flag or the BACKUP_CRON_EXPRESSION environment variable to schedule backups.
• Kubernetes: Use a CronJob resource for scheduled backups.

Cron Syntax

The cron syntax consists of five fields:

* * * * * command

Field	Description	Values
Minute	Minute of the hour	0-59
Hour	Hour of the day	0-23
Day of Month	Day of the month	1-31
Month	Month of the year	1-12
Day of Week	Day of the week (0 = Sunday)	0-7

Examples

• Every 30 minutes: */30 * * * *
• Every hour at minute 0: 0 * * * *
• Every day at 1:00 AM: 0 1 * * *

Predefined Schedules

Entry	Description	Equivalent To
@yearly (or @annually)	Run once a year, midnight, Jan. 1st	0 0 1 1 *
@monthly	Run once a month, midnight, first of month	0 0 1 * *
@weekly	Run once a week, midnight between Sat/Sun	0 0 * * 0
@daily (or @midnight)	Run once a day, midnight	0 0 * * *
@hourly	Run once an hour, beginning of hour	0 * * * *

Intervals

You can also schedule backups at fixed intervals using the format:

@every <duration>

• Example: @every 1h30m10s runs the backup every 1 hour, 30 minutes, and 10 seconds.