github.com/tiredofit/docker-db-backup

March 12, 2026 · View on GitHub

About

This is being migrated to the nfrastack/container-db-backup namespace - A new nfrastack release will come in April 2026

This will build a container for backing up multiple types of DB Servers

Backs up CouchDB, InfluxDB, MySQL/MariaDB, Microsoft SQL, MongoDB, Postgres, Redis servers.

dump to local filesystem or backup to S3 Compatible services, and Azure.
multiple backup job support
- selectable when to start the first dump, whether time of day or relative to container start time
- selectable interval
- selectable omit scheduling during periods of time
- selectable database user and password
- selectable cleanup and archive capabilities
- selectable database name support - all databases, single, or multiple databases
- backup all to separate files or one singular file
checksum support choose to have an MD5 or SHA1 hash generated after backup for verification
compression support (none, gz, bz, xz, zstd)
encryption support (passphrase and public key)
notify upon job failure to email, matrix, mattermost, rocketchat, custom script
zabbix metrics support
hooks to execute pre and post backup job for customization purposes
companion script to aid in restores

Maintainer

Dave Conroy

About
Maintainer
Table of Contents
Prerequisites and Assumptions
Installation
- Build from Source
- Prebuilt Images
  - Multi Architecture
Configuration
Maintenance
Support
License

Prerequisites and Assumptions

You must have a working connection to one of the supported DB Servers and appropriate credentials

Installation

Build from Source

Clone this repository and build the image with docker build <arguments> (imagename) .

Prebuilt Images

Builds of the image are available on Docker Hub

Builds of the image are also available on the Github Container Registry

docker pull ghcr.io/tiredofit/docker-db-backup:(imagetag)

The following image tags are available along with their tagged release based on what's written in the Changelog:

Alpine Base	Tag
latest	`:latest`

docker pull docker.io/tiredofit/db-backup:(imagetag)

Images are built primarily for amd64 architecture, and may also include builds for arm/v7, arm64 and others. These variants are all unsupported. Consider sponsoring my work so that I can work with various hardware. To see if this image supports multiple architectures, type docker manifest (image):(tag)

Configuration

Quick Start

The quickest way to get started is using docker-compose. See the examples folder for a series of example compose.yml that can be modified for development or production use.
Set various environment variables to understand the capabilities of this image.
Map persistent storage for access to configuration and data files for backup.

Persistent Storage

The following directories are used for configuration and can be mapped for persistent storage.

Directory	Description
`/backup`	Backups
`/assets/scripts/pre`	Optional Put custom scripts in this directory to execute before backup operations
`/assets/scripts/post`	Optional Put custom scripts in this directory to execute after backup operations
`/logs`	Optional Logfiles for backup jobs

Environment Variables

Base Images used

This image relies on an Alpine Linux base image that relies on an init system for added capabilities. Outgoing SMTP capabilities are handled via msmtp. Individual container performance monitoring is performed by zabbix-agent. Additional tools include: bash,curl,less,logrotate, nano.

Be sure to view the following repositories to understand all the customizable options:

Image	Description
OS Base	Customized Image based on Alpine Linux

Container Options

Parameter	Description	Default
`MODE`	`AUTO` mode to use internal scheduling routines or `MANUAL` to simply use this as manual backups only executed by your own means	`AUTO`
`USER_DBBACKUP`	The uid that the image should read and write files as (username is `dbbackup`)	`10000`
`GROUP_DBBACKUP`	The gid that the image should read and write files as (groupname is `dbbackup`)	`10000`
`LOG_PATH`	Path to log files	`/logs`
`TEMP_PATH`	Perform Backups and Compression in this temporary directory	`/tmp/backups/`
`MANUAL_RUN_FOREVER`	`TRUE` or `FALSE` if you wish to try to make the container exit after the backup	`TRUE`
`DEBUG_MODE`	If set to `true`, print copious shell script messages to the container log. Otherwise only basic messages are printed.	`FALSE`
`BACKUP_JOB_CONCURRENCY`	How many backup jobs to run concurrently	`1`

Job Defaults

If these are set and no other defaults or variables are set explicitly, they will be added to any of the backup jobs.

Variable	Description	Default
`DEFAULT_BACKUP_LOCATION`	Backup to `FILESYSTEM`, `blobxfer` or `S3` compatible services like S3, Minio, Wasabi	`FILESYSTEM`
`DEFAULT_CHECKSUM`	Either `MD5` or `SHA1` or `NONE`	`MD5`
`DEFAULT_LOG_LEVEL`	Log output on screen and in files `INFO` `NOTICE` `ERROR` `WARN` `DEBUG`	`notice`
`DEFAULT_RESOURCE_OPTIMIZED`	Perform operations at a lower priority to the CPU and IO scheduler	`FALSE`
`DEFAULT_SKIP_AVAILABILITY_CHECK`	Before backing up - skip connectivity check	`FALSE`

Compression Options

Variable	Description	Default
`DEFAULT_COMPRESSION`	Use either Gzip `GZ`, Bzip2 `BZ`, XZip `XZ`, ZSTD `ZSTD` or none `NONE`	`ZSTD`
`DEFAULT_COMPRESSION_LEVEL`	Numerical value of what level of compression to use, most allow `1` to `9`	`3`
	except for `ZSTD` which allows for `1` to `19`
`DEFAULT_GZ_RSYNCABLE`	Use `--rsyncable` (gzip only) for faster rsync transfers and incremental backup deduplication.	`FALSE`
`DEFAULT_ENABLE_PARALLEL_COMPRESSION`	Use multiple cores when compressing backups `TRUE` or `FALSE`	`TRUE`
`DEFAULT_PARALLEL_COMPRESSION_THREADS`	Maximum amount of threads to use when compressing - Integer value e.g. `8`	`autodetected`

Encryption Options

Encryption occurs after compression and the encrypted filename will have a .gpg suffix

Variable	Description	Default	`_FILE`
`DEFAULT_ENCRYPT`	Encrypt file after backing up with GPG	`FALSE`
`DEFAULT_ENCRYPT_PASSPHRASE`	Passphrase to encrypt file with GPG		x
or
`DEFAULT_ENCRYPT_PUBLIC_KEY`	Path of public key to encrypt file with GPG		x
`DEFAULT_ENCRYPT_PRIVATE_KEY`	Path of private key to encrypt file with GPG		x

Scheduling Options

Variable	Description	Default
`DEFAULT_BACKUP_INTERVAL`	How often to do a backup, in minutes after the first backup. Defaults to 1440 minutes, or once per day.	`1440`
`DEFAULT_BACKUP_BEGIN`	What time to do the initial backup. Defaults to immediate. (`+1`)	`+0`
	Must be in one of four formats:
	Absolute HHMM, e.g. `2330` or `0415`
	Relative +MM, i.e. how many minutes after starting the container, e.g. `+0` (immediate), `+10` (in 10 minutes), or `+90` in an hour and a half
	Full datestamp e.g. `2023-12-21 23:30:00`
	Cron expression e.g. `30 23 * * ` Understand the format - BACKUP_INTERVAL is ignored*
`DEFAULT_CLEANUP_TIME`	Value in minutes to delete old backups (only fired when backup interval executes)	`FALSE`
	1440 would delete anything above 1 day old. You don't need to set this variable if you want to hold onto everything.
`DEFAULT_ARCHIVE_TIME`	Value in minutes to move all files files older than (x) from
`DEFAULT_BACKUP_BLACKOUT_BEGIN`	Use `HHMM` notation to start a blackout period where no backups occur eg `0420`
`DEFAULT_BACKUP_BLACKOUT_END`	Use `HHMM` notation to set the end period where no backups occur eg `0430`

You may need to wrap your DEFAULT_BACKUP_BEGIN value in quotes for it to properly parse. There have been reports of backups that start with a 0 get converted into a different format which will not allow the timer to start at the correct time.

Default Database Options

CouchDB

Variable	Description	Default	`_FILE`
`DEFAULT_PORT`	CouchDB Port	`5984`	x

InfluxDB

Variable	Description	Default	`_FILE`
`DEFAULT_PORT`	InfluxDB Port		x
	Version 1.x	`8088`
	Version 2.x	`8086`
`DEFAULT_INFLUX_VERSION`	What Version of Influx are you backing up from `1`.x or `2` series - amd64 and aarch/armv8 only for `2`	`2`

MariaDB/MySQL

Variable	Description	Default	`_FILE`
`DEFAULT_PORT`	MySQL / MariaDB Port	`3306`	x
`DEFAULT_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DEFAULT_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`
`DEFAULT_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DEFAULT_MYSQL_CLIENT`	Choose between `mariadb` or `mysql` client to perform dump operations for compatibility purposes	`mariadb`
`DEFAULT_MYSQL_EVENTS`	Backup Events	`TRUE`
`DEFAULT_MYSQL_MAX_ALLOWED_PACKET`	Max allowed packet	`512M`
`DEFAULT_MYSQL_SINGLE_TRANSACTION`	Backup in a single transaction	`TRUE`
`DEFAULT_MYSQL_STORED_PROCEDURES`	Backup stored procedures	`TRUE`
`DEFAULT_MYSQL_ENABLE_TLS`	Enable TLS functionality	`FALSE`
`DEFAULT_MYSQL_TLS_VERIFY`	(optional) If using TLS (by means of MYSQL_TLS_* variables) verify remote host	`FALSE`
`DEFAULT_MYSQL_TLS_VERSION`	What TLS `v1.1` `v1.2` `v1.3` version to utilize	`TLSv1.1,TLSv1.2,TLSv1.3`
`DEFAULT_MYSQL_TLS_CA_FILE`	Filename to load custom CA certificate for connecting via TLS	`/etc/ssl/cert.pem`	x
`DEFAULT_MYSQL_TLS_CERT_FILE`	Filename to load client certificate for connecting via TLS		x
`DEFAULT_MYSQL_TLS_KEY_FILE`	Filename to load client key for connecting via TLS		x

Microsoft SQL

Variable	Description	Default	`_FILE`
`DEFAULT_PORT`	Microsoft SQL Port	`1433`	x
`DEFAULT_MSSQL_MODE`	Backup `DATABASE` or `TRANSACTION` logs	`DATABASE`

MongoDB

Variable	Description	Default	`_FILE`
`DEFAULT_AUTH`	(Optional) Authentication Database		x
`DEFAULT_PORT`	MongoDB Port	`27017`	x
`MONGO_CUSTOM_URI`	If you wish to override the MongoDB Connection string enter it here e.g. `mongodb+srv://username:password@cluster.id.mongodb.net`		x
	This environment variable will be parsed and populate the `DB_NAME` and `DB_HOST` variables to properly build your backup filenames.
	You can override them by making your own entries

Postgresql

Variable	Description	Default	`_FILE`
`DEFAULT_AUTH`	(Optional) Authentication Database		x
`DEFAULT_BACKUP_GLOBALS`	Backup Globals as part of backup procedure
`DEFAULT_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DEFAULT_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`
`DEFAULT_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DEFAULT_PORT`	PostgreSQL Port	`5432`	x

Redis

Variable	Description	Default	`_FILE`
`DEFAULT_PORT`	Default Redis Port	`6379`	x
`DEFAULT_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`

Default Storage Options

Options that are related to the value of DEFAULT_BACKUP_LOCATION

Filesystem

If DEFAULT_BACKUP_LOCTION = FILESYSTEM then the following options are used:

Variable	Description	Default
`DEFAULT_CREATE_LATEST_SYMLINK`	Create a symbolic link pointing to last backup in this format: `latest-(DB_TYPE)_(DB_NAME)_(DB_HOST)`	`TRUE`
`DEFAULT_FILESYSTEM_PATH`	Directory where the database dumps are kept.	`/backup`
`DEFAULT_FILESYSTEM_PATH_PERMISSION`	Permissions to apply to backup directory	`700`
`DEFAULT_FILESYSTEM_ARCHIVE_PATH`	Optional Directory where the database dumps archives are kept	`${DEFAULT_FILESYSTEM_PATH}/archive/`
`DEFAULT_FILESYSTEM_PERMISSION`	Permissions to apply to files.	`600`

S3

If DEFAULT_BACKUP_LOCATION = S3 then the following options are used:

Parameter	Description	Default	`_FILE`
`DEFAULT_S3_BUCKET`	S3 Bucket name e.g. `mybucket`		x
`DEFAULT_S3_KEY_ID`	S3 Key ID (Optional)		x
`DEFAULT_S3_KEY_SECRET`	S3 Key Secret (Optional)		x
`DEFAULT_S3_PATH`	S3 Pathname to save to (must NOT end in a trailing slash e.g. '`backup`')		x
`DEFAULT_S3_REGION`	Define region in which bucket is defined. Example: `ap-northeast-2`		x
`DEFAULT_S3_HOST`	Hostname (and port) of S3-compatible service, e.g. `minio:8080`. Defaults to AWS.		x
`DEFAULT_S3_PROTOCOL`	Protocol to connect to `DEFAULT_S3_HOST`. Either `http` or `https`. Defaults to `https`.	`https`	x
`DEFAULT_S3_EXTRA_OPTS`	Add any extra options to the end of the `aws-cli` process execution		x
`DEFAULT_S3_CERT_CA_FILE`	Map a volume and point to your custom CA Bundle for verification e.g. `/certs/bundle.pem`		x
OR
`DEFAULT_S3_CERT_SKIP_VERIFY`	Skip verifying self signed certificates when connecting	`TRUE`

When DEFAULT_S3_KEY_ID and/or DEFAULT_S3_KEY_SECRET is not set, will try to use IAM role assigned (if any) for uploading the backup files to S3 bucket.

Azure

If DEFAULT_BACKUP_LOCATION = blobxfer then the following options are used:.

Parameter	Description	Default	`_FILE`
`DEFAULT_BLOBXFER_STORAGE_ACCOUNT`	Microsoft Azure Cloud storage account name.		x
`DEFAULT_BLOBXFER_STORAGE_ACCOUNT_KEY`	Microsoft Azure Cloud storage account key.		x
`DEFAULT_BLOBXFER_REMOTE_PATH`	Remote Azure path	`/docker-db-backup`	x
`DEFAULT_BLOBXFER_MODE`	Azure Storage mode e.g. `auto`, `file`, `append`, `block` or `page`	`auto`	x

When DEFAULT_BLOBXFER_MODE is set to auto it will use blob containers by default. If the DEFAULT_BLOBXFER_REMOTE_PATH path does not exist a blob container with that name will be created.

This service uploads files from backup targed directory DEFAULT_FILESYSTEM_PATH. If the a cleanup configuration in DEFAULT_CLEANUP_TIME is defined, the remote directory on Azure storage will also be cleaned automatically.

Hooks

Path Options

Parameter	Description	Default
`DEFAULT_SCRIPT_LOCATION_PRE`	Location on filesystem inside container to execute bash scripts pre backup	`/assets/scripts/pre/`
`DEFAULT_SCRIPT_LOCATION_POST`	Location on filesystem inside container to execute bash scripts post backup	`/assets/scripts/post/`
`DEFAULT_PRE_SCRIPT`	Fill this variable in with a command to execute pre backing up
`DEFAULT_POST_SCRIPT`	Fill this variable in with a command to execute post backing up

Pre Backup

If you want to execute a custom script before a backup starts, you can drop bash scripts with the extension of .sh in the location defined in DB01_SCRIPT_LOCATION_PRE. See the following example to utilize:

$ cat pre-script.sh
##!/bin/bash

# #### Example Pre Script
# #### \$1=DBXX_TYPE (Type of Backup)
# #### \$2=DBXX_HOST (Backup Host)
# #### \$3=DBXX_NAME (Name of Database backed up
# #### \$4=BACKUP START TIME (Seconds since Epoch)
# #### \$5=BACKUP FILENAME (Filename)

echo "${1} Backup Starting on ${2} for ${3} at ${4}. Filename: ${5}"

## script DBXX_TYPE DBXX_HOST DBXX_NAME STARTEPOCH BACKUP_FILENAME
${f} "${backup_job_db_type}" "${backup_job_db_host}" "${backup_job_db_name}" "${backup_routines_start_time}" "${backup_job_file}"

Outputs the following on the console:

mysql Backup Starting on example-db for example at 1647370800. Filename: mysql_example_example-db_202200315-000000.sql.bz2

Post backup

If you want to execute a custom script at the end of a backup, you can drop bash scripts with the extension of .sh in the location defined in DB01_SCRIPT_LOCATION_POST. Also to support legacy users /assets/custom-scripts is also scanned and executed.See the following example to utilize:

$ cat post-script.sh
##!/bin/bash

# #### Example Post Script
# #### \$1=EXIT_CODE (After running backup routine)
# #### \$2=DBXX_TYPE (Type of Backup)
# #### \$3=DBXX_HOST (Backup Host)
# #### #4=DBXX_NAME (Name of Database backed up
# #### \$5=BACKUP START TIME (Seconds since Epoch)
# #### \$6=BACKUP FINISH TIME (Seconds since Epoch)
# #### \$7=BACKUP TOTAL TIME (Seconds between Start and Finish)
# #### \$8=BACKUP FILENAME (Filename)
# #### \$9=BACKUP FILESIZE
# #### \$10=HASH (If CHECKSUM enabled)
# #### \$11=MOVE_EXIT_CODE

echo "${1} ${2} Backup Completed on ${3} for ${4} on ${5} ending ${6} for a duration of ${7} seconds. Filename: ${8} Size: ${9} bytes MD5: ${10}"

  ## script EXIT_CODE DB_TYPE DB_HOST DB_NAME STARTEPOCH FINISHEPOCH DURATIONEPOCH BACKUP_FILENAME FILESIZE CHECKSUMVALUE
  ${f} "${exit_code}" "${dbtype}" "${backup_job_db_host}" "${backup_job_db_name}" "${backup_routines_start_time}" "${backup_routines_finish_time}" "${backup_routines_total_time}" "${backup_job_file}" "${filesize}" "${checksum_value}" "${move_exit_code}

Outputs the following on the console:

0 mysql Backup Completed on example-db for example on 1647370800 ending 1647370920 for a duration of 120 seconds. Filename: mysql_example_example-db_202200315-000000.sql.bz2 Size: 7795 bytes Hash: 952fbaafa30437494fdf3989a662cd40 0

If you wish to change the size value from bytes to megabytes set environment variable DB01_SIZE_VALUE=megabytes

You must make your scripts executable otherwise there is an internal check that will skip trying to run it otherwise. If for some reason your filesystem or host is not detecting it right, use the environment variable DB01_POST_SCRIPT_SKIP_X_VERIFY=TRUE to bypass.

Job Backup Options

If DEFAULT_ variables are set and you do not wish for the settings to carry over into your jobs, you can set the appropriate environment variable with the value of unset. Otherwise, override them per backup job. Additional backup jobs can be scheduled by using DB02_,DB03_,DB04_ ... prefixes. See Specific Database Options which may overrule this list.

Parameter	Description	`_FILE`
`DB01_TYPE`	Type of DB Server to backup `couch` `influx` `mysql` `mssql` `pgsql` `mongo` `redis` `sqlite3`
`DB01_HOST`	Server Hostname e.g. `mariadb`. For `sqlite3`, full path to DB file e.g. `/backup/db.sqlite3`	x
`DB01_NAME`	Schema Name e.g. `database`	x
`DB01_USER`	username for the database(s) - Can use `root` for MySQL	x
`DB01_PASS`	(optional if DB doesn't require it) password for the database	x

Variable	Description	Default
`DB01_BACKUP_LOCATION`	Backup to `FILESYSTEM`, `blobxfer` or `S3` compatible services like S3, Minio, Wasabi	`FILESYSTEM`
`DB01_CHECKSUM`	Either `MD5` or `SHA1` or `NONE`	`MD5`
`DB01_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DB01_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`
`DB01_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DB01_LOG_LEVEL`	Log output on screen and in files `INFO` `NOTICE` `ERROR` `WARN` `DEBUG`	`debug`
`DB01_RESOURCE_OPTIMIZED`	Perform operations at a lower priority to the CPU and IO scheduler	`FALSE`
`DB01_SKIP_AVAILABILITY_CHECK`	Before backing up - skip connectivity check	`FALSE`

Compression Options

Variable	Description	Default
`DB01_COMPRESSION`	Use either Gzip `GZ`, Bzip2 `BZ`, XZip `XZ`, ZSTD `ZSTD` or none `NONE`	`ZSTD`
`DB01_COMPRESSION_LEVEL`	Numerical value of what level of compression to use, most allow `1` to `9`	`3`
	except for `ZSTD` which allows for `1` to `19`
`DB01_GZ_RSYNCABLE`	Use `--rsyncable` (gzip only) for faster rsync transfers and incremental backup deduplication.	`FALSE`
`DB01_ENABLE_PARALLEL_COMPRESSION`	Use multiple cores when compressing backups `TRUE` or `FALSE`	`TRUE`
`DB01_PARALLEL_COMPRESSION_THREADS`	Maximum amount of threads to use when compressing - Integer value e.g. `8`	`autodetected`

Encryption Options

Encryption will occur after compression and the resulting filename will have a .gpg suffix

Variable	Description	Default	`_FILE`
`DB01_ENCRYPT`	Encrypt file after backing up with GPG	`FALSE`
`DB01_ENCRYPT_PASSPHRASE`	Passphrase to encrypt file with GPG		x
or
`DB01_ENCRYPT_PUBLIC_KEY`	Path of public key to encrypt file with GPG		x
`DB01_ENCRYPT_PRIVATE_KEY`	Path of private key to encrypt file with GPG		x

Scheduling Options

Variable	Description	Default
`DB01_BACKUP_INTERVAL`	How often to do a backup, in minutes after the first backup. Defaults to 1440 minutes, or once per day.	`1440`
`DB01_BACKUP_BEGIN`	What time to do the initial backup. Defaults to immediate. (`+1`)	`+0`
	Must be in one of four formats:
	Absolute HHMM, e.g. `2330` or `0415`
	Relative +MM, i.e. how many minutes after starting the container, e.g. `+0` (immediate), `+10` (in 10 minutes), or `+90` in an hour and a half
	Full datestamp e.g. `2023-12-21 23:30:00`
	Cron expression e.g. `30 23 * * ` Understand the format - BACKUP_INTERVAL is ignored*
`DB01_CLEANUP_TIME`	Value in minutes to delete old backups (only fired when backup interval executes)	`FALSE`
	1440 would delete anything above 1 day old. You don't need to set this variable if you want to hold onto everything.
`DB01_ARCHIVE_TIME`	Value in minutes to move all files files older than (x) from `DB01_BACKUP_FILESYSTEM_PATH`
	to `DB01_BACKUP_FILESYSTEM_ARCHIVE_PATH` - which is useful when pairing against an external backup system.
`DB01_BACKUP_BLACKOUT_BEGIN`	Use `HHMM` notation to start a blackout period where no backups occur eg `0420`
`DB01_BACKUP_BLACKOUT_END`	Use `HHMM` notation to set the end period where no backups occur eg `0430`

Specific Database Options

CouchDB

Variable	Description	Default	`_FILE`
`DB01_PORT`	CouchDB Port	`5984`	x

InfluxDB

Variable	Description	Default	`_FILE`
`DB01_PORT`	InfluxDB Port		x
	Version 1.x	`8088`
	Version 2.x	`8086`
`DB01_INFLUX_VERSION`	What Version of Influx are you backing up from `1`.x or `2` series - amd64 and aarch/armv8 only for `2`	`2`

Your Organization will be mapped to DB_USER and your root token will need to be mapped to DB_PASS. You may use DB_NAME=ALL to backup the entire set of databases. For DB_HOST use syntax of http(s)://db-name

MariaDB/MySQL

Variable	Description	Default	`_FILE`
`DB01_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DB01_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DB01_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`
`DB01_NAME`	Schema Name e.g. `database` or `ALL` to backup all databases the user has access to.
	Backup multiple by separating with commas eg `db1,db2`		x
`DB01_NAME_EXCLUDE`	If using `ALL` - use this as to exclude databases separated via commas from being backed up		x
`DB01_SPLIT_DB`	If using `ALL` - use this to split each database into its own file as opposed to one singular file	`FALSE`
`DB01_PORT`	MySQL / MariaDB Port	`3306`	x
`DB01_MYSQL_EVENTS`	Backup Events for	`TRUE`
`DB01_MYSQL_MAX_ALLOWED_PACKET`	Max allowed packet	`512M`
`DB01_MYSQL_SINGLE_TRANSACTION`	Backup in a single transaction	`TRUE`
`DB01_MYSQL_STORED_PROCEDURES`	Backup stored procedures	`TRUE`
`DB01_MYSQL_ENABLE_TLS`	Enable TLS functionality	`FALSE`
`DB01_MYSQL_TLS_VERIFY`	(optional) If using TLS (by means of MYSQL_TLS_* variables) verify remote host	`FALSE`
`DB01_MYSQL_TLS_VERSION`	What TLS `v1.1` `v1.2` `v1.3` version to utilize	`TLSv1.1,TLSv1.2,TLSv1.3`
`DB01_MYSQL_TLS_CA_FILE`	Filename to load custom CA certificate for connecting via TLS	`/etc/ssl/cert.pem`	x
`DB01_MYSQL_TLS_CERT_FILE`	Filename to load client certificate for connecting via TLS		x
`DB01_MYSQL_TLS_KEY_FILE`	Filename to load client key for connecting via TLS		x

Microsoft SQL

Variable	Description	Default	`_FILE`
`DB01_PORT`	Microsoft SQL Port	`1433`	x
`DB01_MSSQL_MODE`	Backup `DATABASE` or `TRANSACTION` logs	`DATABASE`

MongoDB

Variable	Description	Default	`_FILE`
`DB01_AUTH`	(Optional) Authentication Database
`DB01_PORT`	MongoDB Port	`27017`	x
`DB01_MONGO_CUSTOM_URI`	If you wish to override the MongoDB Connection string enter it here e.g. `mongodb+srv://username:password@cluster.id.mongodb.net`		x
	This environment variable will be parsed and populate the `DB_NAME` and `DB_HOST` variables to properly build your backup filenames.
	You can override them by making your own entries

Postgresql

Variable	Description	Default	`_FILE`
`DB01_AUTH`	(Optional) Authentication Database
`DB01_BACKUP_GLOBALS`	Backup Globals after backing up database (forces `TRUE` if `_NAME=ALL``)	`FALSE`
`DB01_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DB01_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DB01_EXTRA_ENUMERATION_OPTS`	Pass extra arguments to the database enumeration command only, add them here e.g. `--extra-command`
`DB01_NAME`	Schema Name e.g. `database` or `ALL` to backup all databases the user has access to.
	Backup multiple by separating with commas eg `db1,db2`		x
`DB01_SPLIT_DB`	If using `ALL` - use this to split each database into its own file as opposed to one singular file	`FALSE`
`DB01_PORT`	PostgreSQL Port	`5432`	x

Redis

Variable	Description	Default	`_FILE`
`DB01_EXTRA_OPTS`	Pass extra arguments to the backup and database enumeration command, add them here e.g. `--extra-command`
`DB01_EXTRA_BACKUP_OPTS`	Pass extra arguments to the backup command only, add them here e.g. `--extra-command`
`DB01_PORT`	Redis Port	`6379`	x

SQLite

Variable	Description	Default	`_FILE`
`DB01_HOST`	Enter the full path to DB file e.g. `/backup/db.sqlite3`		x

Specific Storage Options

Options that are related to the value of DB01_BACKUP_LOCATION

Filesystem

If DB01_BACKUP_LOCTION = FILESYSTEM then the following options are used:

Variable	Description	Default
`DB01_CREATE_LATEST_SYMLINK`	Create a symbolic link pointing to last backup in this format: `latest-(DB_TYPE)-(DB_NAME)-(DB_HOST)`	`TRUE`
`DB01_FILESYSTEM_PATH`	Directory where the database dumps are kept.	`/backup`
`DB01_FILESYSTEM_PATH_PERMISSION`	Permissions to apply to backup directory	`700`
`DB01_FILESYSTEM_ARCHIVE_PATH`	Optional Directory where the database dumps archives are kept	`${DB01_FILESYSTEM_PATH}/archive/`
`DB01_FILESYSTEM_PERMISSION`	Directory and File permissions to apply to files.	`600`

S3

If DB01_BACKUP_LOCATION = S3 then the following options are used:

Parameter	Description	Default	`_FILE`
`DB01_S3_BUCKET`	S3 Bucket name e.g. `mybucket`		x
`DB01_S3_KEY_ID`	S3 Key ID (Optional)		x
`DB01_S3_KEY_SECRET`	S3 Key Secret (Optional)		x
`DB01_S3_PATH`	S3 Pathname to save to (must NOT end in a trailing slash e.g. '`backup`')		x
`DB01_S3_REGION`	Define region in which bucket is defined. Example: `ap-northeast-2`		x
`DB01_S3_HOST`	Hostname (and port) of S3-compatible service, e.g. `minio:8080`. Defaults to AWS.		x
`DB01_S3_PROTOCOL`	Protocol to connect to `DB01_S3_HOST`. Either `http` or `https`. Defaults to `https`.	`https`	x
`DB01_S3_EXTRA_OPTS`	Add any extra options to the end of the `aws-cli` process execution		x
`DB01_S3_CERT_CA_FILE`	Map a volume and point to your custom CA Bundle for verification e.g. `/certs/bundle.pem`		x
OR
`DB01_S3_CERT_SKIP_VERIFY`	Skip verifying self signed certificates when connecting	`TRUE`

When DB01_S3_KEY_ID and/or DB01_S3_KEY_SECRET is not set, will try to use IAM role assigned (if any) for uploading the backup files to S3 bucket.

Azure

If DB01_BACKUP_LOCATION = blobxfer then the following options are used:.

Parameter	Description	Default	`_FILE`
`DB01_BLOBXFER_STORAGE_ACCOUNT`	Microsoft Azure Cloud storage account name.		x
`DB01_BLOBXFER_STORAGE_ACCOUNT_KEY`	Microsoft Azure Cloud storage account key.		x
`DB01_BLOBXFER_REMOTE_PATH`	Remote Azure path	`/docker-db-backup`	x
`DB01_BLOBXFER_REMOTE_MODE`	Azure Storage mode e.g. `auto`, `file`, `append`, `block` or `page`	`auto`	x

When DEFAULT_BLOBXFER_MODE is set to auto it will use blob containers by default. If the DEFAULT_BLOBXFER_REMOTE_PATH path does not exist a blob container with that name will be created.

This service uploads files from backup directory DB01_BACKUP_FILESYSTEM_PATH. If the a cleanup configuration in DB01_CLEANUP_TIME is defined, the remote directory on Azure storage will also be cleaned automatically.

Hooks

Path Options

Parameter	Description	Default
`DB01_SCRIPT_LOCATION_PRE`	Location on filesystem inside container to execute bash scripts pre backup	`/assets/scripts/pre/`
`DB01_SCRIPT_LOCATION_POST`	Location on filesystem inside container to execute bash scripts post backup	`/assets/scripts/post/`
`DB01_PRE_SCRIPT`	Fill this variable in with a command to execute pre backing up
`DB01_POST_SCRIPT`	Fill this variable in with a command to execute post backing up

Pre Backup

$ cat pre-script.sh
##!/bin/bash

# #### Example Pre Script
# #### \$1=DB01_TYPE (Type of Backup)
# #### \$2=DB01_HOST (Backup Host)
# #### \$3=DB01_NAME (Name of Database backed up
# #### \$4=BACKUP START TIME (Seconds since Epoch)
# #### \$5=BACKUP FILENAME (Filename)

echo "${1} Backup Starting on ${2} for ${3} at ${4}. Filename: ${5}"

## script DB01_TYPE DB01_HOST DB01_NAME STARTEPOCH BACKUP_FILENAME
${f} "${backup_job_db_type}" "${backup_job_db_host}" "${backup_job_db_name}" "${backup_routines_start_time}" "${backup_job_filename}"

Outputs the following on the console:

mysql Backup Starting on example-db for example at 1647370800. Filename: mysql_example_example-db_202200315-000000.sql.bz2

Post backup

$ cat post-script.sh
##!/bin/bash

# #### Example Post Script
# #### \$1=EXIT_CODE (After running backup routine)
# #### \$2=DB_TYPE (Type of Backup)
# #### \$3=DB_HOST (Backup Host)
# #### #4=DB_NAME (Name of Database backed up
# #### \$5=BACKUP START TIME (Seconds since Epoch)
# #### \$6=BACKUP FINISH TIME (Seconds since Epoch)
# #### \$7=BACKUP TOTAL TIME (Seconds between Start and Finish)
# #### \$8=BACKUP FILENAME (Filename)
# #### \$9=BACKUP FILESIZE
# #### \$10=HASH (If CHECKSUM enabled)
# #### \$11=MOVE_EXIT_CODE

echo "${1} ${2} Backup Completed on ${3} for ${4} on ${5} ending ${6} for a duration of ${7} seconds. Filename: ${8} Size: ${9} bytes MD5: ${10}"

  ## script EXIT_CODE DB_TYPE DB_HOST DB_NAME STARTEPOCH FINISHEPOCH DURATIONEPOCH BACKUP_FILENAME FILESIZE CHECKSUMVALUE
  ${f} "${exit_code}" "${dbtype}" "${dbhost}" "${dbname}" "${backup_routines_start_time}" "${backup_routines_finish_time}" "${backup_routines_total_time}" "${backup_job_filename}" "${filesize}" "${checksum_value}" "${move_exit_code}

Outputs the following on the console:

If you wish to change the size value from bytes to megabytes set environment variable DB01_SIZE_VALUE=megabytes

Notifications

This image has capabilities on sending notifications via a handful of services when a backup job fails. This is a global option that cannot be individually set per backup job.

Parameter	Description	Default
`ENABLE_NOTIFICATIONS`	Enable Notifications	`FALSE`
`NOTIFICATION_TYPE`	`CUSTOM` `EMAIL` `MATRIX` `MATTERMOST` `ROCKETCHAT` - Seperate Multiple by commas

Custom Notifications

The following is sent to the custom script. Use how you wish:

\$1 unix timestamp
\$2 logfile
\$3 errorcode
\$4 subject
\$5 body/error message

Parameter	Description	Default
`NOTIFICATION_CUSTOM_SCRIPT`	Path and name of custom script to execute notification.

Email Notifications

See more details in the base image listed above for more mail environment variables.

Parameter	Description	`_FILE`
`MAIL_FROM`	What email address to send mail from for errors
`MAIL_TO`	What email address to send mail to for errors. Send to multiple by seperating with comma.
`SMTP_HOST`	What SMTP server to use for sending mail	x
`SMTP_PORT`	What SMTP port to use for sending mail	x

Matrix Notifications

Fetch a MATRIX_ACCESS_TOKEN:

curl -XPOST -d '{"type":"m.login.password", "user":"myuserid", "password":"mypass"}' "https://matrix.org/_matrix/client/r0/login"

Copy the JSON response access_token that will look something like this:

{"access_token":"MDAxO...blahblah","refresh_token":"MDAxO...blahblah","home_server":"matrix.org","user_id":"@myuserid:matrix.org"}

Parameter	Description	`_FILE`
`MATRIX_HOST`	URL (https://matrix.example.com) of Matrix Homeserver	x
`MATRIX_ROOM`	Room ID eg `\!abcdef:example.com` to send to. Send to multiple by seperating with comma.	x
`MATRIX_ACCESS_TOKEN`	Access token of user authorized to send to room	x

Mattermost Notifications

Parameter	Description	`_FILE`
`MATTERMOST_WEBHOOK_URL`	Full URL to send webhook notifications to	x
`MATTERMOST_RECIPIENT`	Channel or User to send Webhook notifications to. Send to multiple by seperating with comma.	x
`MATTERMOST_USERNAME`	Username to send as eg `tiredofit`	x

Rocketchat Notifications

Parameter	Description	`_FILE`
`ROCKETCHAT_WEBHOOK_URL`	Full URL to send webhook notifications to	x
`ROCKETCHAT_RECIPIENT`	Channel or User to send Webhook notifications to. Send to multiple by seperating with comma.	x
`ROCKETCHAT_USERNAME`	Username to send as eg `tiredofit`	x

Maintenance

Shell Access

For debugging and maintenance purposes you may want access the containers shell.

bash docker exec -it (whatever your container name is) bash

Manual Backups

Manual Backups can be performed by entering the container and typing backup-now. This will execute all the backup tasks that are scheduled by means of the BACKUPXX_ variables. Alternatively if you wanted to execute a job on its own you could simply type backup01-now (or whatever your number would be). There is no concurrency, and jobs will be executed sequentially.

Recently there was a request to have the container work with Kubernetes cron scheduling. This can theoretically be accomplished by setting the container MODE=MANUAL and then setting MANUAL_RUN_FOREVER=FALSE - You would also want to disable a few features from the upstream base images specifically CONTAINER_ENABLE_SCHEDULING and CONTAINER_ENABLE_MONITORING. This should allow the container to start, execute a backup by executing and then exit cleanly. An alternative way to running the script is to execute /etc/services.available/10-db-backup/run.

Restoring Databases

Entering in the container and executing restore will execute a menu based script to restore your backups - MariaDB, Postgres, and Mongo supported.

You will be presented with a series of menus allowing you to choose:

What file to restore
What type of DB Backup
What Host to restore to
What Database Name to restore to
What Database User to use
What Database Password to use
What Database Port to use

The image will try to do auto detection based on the filename for the type, hostname, and database name. The image will also allow you to use environment variables or Docker secrets used to backup the images

The script can also be executed skipping the interactive mode by using the following syntax/

`restore <filename> <db_type> <db_hostname> <db_name> <db_user> <db_pass> <db_port>`

If you only enter some of the arguments you will be prompted to fill them in.

Support

These images were built to serve a specific need in a production environment and gradually have had more functionality added based on requests from the community.

Usage

The Discussions board is a great place for working with the community on tips and tricks of using this image.
Sponsor me for personalized support

Bugfixes

Please, submit a Bug Report if something isn't working as expected. I'll do my best to issue a fix in short order.

Feature Requests

Feel free to submit a feature request, however there is no guarantee that it will be added, or at what timeline.
Sponsor me regarding development of features.

Updates

Best effort to track upstream changes, More priority if I am actively using the image in a production environment.
Sponsor me for up to date releases.

License

MIT. See LICENSE for more details.