iaksit / atlassian-bitbucket-diy-backup

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Bitbucket Server DIY Backup

This repository contains a set of example scripts that demonstrate best practices for backing up a Bitbucket Server/Data Center instance using a curated set of vendor technologies.

For example only

These scripts are provided as a working example, which should be extended/enhanced/optimized as necessary based on the environment in which they will be used. These examples are intended as a jumping off point for you to create your own backup strategy; they are not a drop-in solution for all potential configurations of Bitbucket Server/Data Center.

System administrators are expected to know their environment, and what technology is in use in that environment, and to use these example scripts to help them build their own backup solution that makes the best use of the available tools.

To report bugs in the examples, create a support request.

To report suggestions for how the examples could be improved, create a suggestion.

About these scripts

The scripts contained within this repository demonstrate two types of backup:

• Backups with downtime. This is the only type of backup available if your Bitbucket Server/Data Center instance is older than 4.8, or if you are using the rsync strategy (described below)
• Zero downtime backups. To enable Zero Downtime Backup, you will need to set the variable BACKUP_ZERO_DOWNTIME to true. If true, this variable will backup the filesystem and database without locking the application. NOTE: This is only supported when used with Bitbucket Server/Data Center 4.8 or newer. It also requires a compatible strategy for taking atomic block level snapshots of the home directory.

These scripts have been changed significantly with the release of Bitbucket 6.0. If updating from an older version of the scripts, a number of configured variables will need updating. See the Updating section below for a list of considerations when updating to a newer version of the backup scripts.

Strategies

In order to use these example scripts you must specify a BACKUP_DISK_TYPE and BACKUP_DATABASE_TYPE strategy, and optionally a BACKUP_ARCHIVE_TYPE and/or BACKUP_ELASTICSEARCH_TYPE strategy. These strategies can be set within the bitbucket.diy-backup.vars.sh.

For each BACKUP_DISK_TYPE, BACKUP_DATABASE_TYPE, BACKUP_ARCHIVE_TYPE and BACKUP_ELASTICSEARCH_TYPE strategy, additional variables need to be set in bitbucket.diy-backup.vars.sh to configure the details of your Bitbucket instance's home directory, database, and other options. Refer to bitbucket.diy-backup.vars.sh.example for a complete description of all the various variables and their definitions.

BACKUP_DISK_TYPE Strategy for backing up the Bitbucket home directory and any configured data stores, valid values are:

• amazon-ebs - Amazon EBS snapshots of the volume(s) containing the home directory and data stores.
• rsync - "rsync" of the home directory and data store contents to a temporary location. NOTE: This can NOT be used with BACKUP_ZERO_DOWNTIME=true.
• zfs - ZFS snapshot strategy for home directory and data store backups.

BACKUP_DATABASE_TYPE Strategy for backing up the database, valid values are:

• amazon-rds - Amazon RDS snapshots.
• mysql - MySQL using "mysqldump" to backup and "mysql" to restore.
• postgresql - PostgreSQL using "pg_dump" to backup and "pg_restore" to restore.
• postgresql-fslevel - PostgreSQL with data directory located in the file system volume as home directory (so that it will be included implicitly in the home volume snapshot).
• postgresql-docker - PostgreSQL running in a Docker container, using "pg_dump" to backup and "pg_restore" to restore

BACKUP_ARCHIVE_TYPE Strategy for archiving backups and/or copying them to an offsite location, valid values are:

• <leave-blank> - Do not use an archiving strategy.
• aws-snapshots - AWS EBS and/or RDS snapshots, with optional copy to another region.
• gpg-zip - "gpg-zip" archive
• tar - Unix "tar" archive

BACKUP_ELASTICSEARCH_TYPE Strategy for backing up Elasticsearch, valid values are:

• <leave blank> - No separate snapshot and restore of Elasticsearch state (default). - recommended for Bitbucket Server instances configured to use the (default) bundled Elasticsearch instance. In this case all Elasticsearch state is stored under ${BITBUCKET_HOME}/shared and therefore already included in the home directory snapshot implicitly. NOTE: If Bitbucket is configured to use a remote Elasticsearch instance (which all Bitbucket Data Center instances must be), then its state is NOT included implictly in home directory backups, and may therefore take some to rebuild after a restore UNLESS one of the following strategies is used.
• amazon-es - Amazon Elasticsearch Service - uses an S3 bucket as a snapshot repository. Requires both python and the python package 'boto' to be installed in order to sign the requests to AWS ES. Once python has been installed run 'sudo pip install boto' to install the python boto package.
• s3 - Amazon S3 bucket - requires the Elasticsearch Cloud plugin to be installed. See https://www.elastic.co/guide/en/elasticsearch/plugins/2.3/cloud-aws.html
• fs - Shared filesystem - requires all data and master nodes to mount a shared file system to the same mount point and that it is configured in the elasticsearch.yml file. See https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html

STANDBY_DISK_TYPE Strategy for Bitbucket home directory disaster recovery, valid values are:

• zfs - ZFS snapshot strategy for disk replication.

STANDBY_DATABASE_TYPE Strategy for replicating the database, valid values are:

• amazon-rds - Amazon RDS Read replica
• postgresql - PostgreSQL replication

Configuration

You will need to configure the script variables found in bitbucket.diy-backup.vars.sh based on your chosen strategies. Note that not all options need to be configured. The backup strategy you choose together with your vendor tools will determine which options should be set. See bitbucket.diy-backup.vars.sh.example for a complete set of all configuration options.

BACKUP_ZERO_DOWNTIME If set to true, the home directory and database will be backed up without locking Bitbucket by placing it in maintenance mode. NOTE: This can NOT be used with Bitbucket Server versions older than 4.8. For more information, see Zero downtime backup. Make sure you read and understand this document before uncommenting this variable.

Upgrading

In order to support Bitbucket Server 6.0, significant changes have been made to these scripts. If moving from an older version of the DIY scripts, you will need to change certain variables in the bitbucket.diy-backup.vars.sh file. These changes have been noted in bitbucket.diy-backup.vars.sh.example.

• BACKUP_HOME_TYPE has been renamed to BACKUP_DISK_TYPE
• STANDBY_HOME_TYPE has been renamed to STANDBY_DISK_TYPE

####amazon-ebs strategy ####

• A new EBS_VOLUME_MOUNT_POINT_AND_DEVICE_NAMES variable has been introduced, which is an array of all EBS volumes (the shared home directory, and any configured data stores). It needs to contain the details for the shared home that were previously stored in HOME_DIRECTORY_MOUNT_POINT and HOME_DIRECTORY_DEVICE_NAME.
• The HOME_DIRECTORY_DEVICE_NAME variable is no longer needed.
• The HOME_DIRECTORY_MOUNT_POINT variable should still be set.
• RESTORE_HOME_DIRECTORY_VOLUME_TYPE has been renamed to RESTORE_DISK_VOLUME_TYPE.
• RESTORE_HOME_DIRECTORY_IOPS has been renamed to RESTORE_DISK_IOPS.
• ZFS_HOME_TANK_NAME has been replaced with ZFS_FILESYSTEM_NAMES, an array containing filesystem names for the shared home, as well as any data stores. This is only required if FILESYSTEM_TYPE is set to zfs.

Note: EBS snapshots are now tagged with the device name they are a snapshot of. If snapshots were taken previously, they will not have this tag, and as a result:

• Old ebs snapshots without a "Device" tag won't be cleaned up automatically
• Restoring from an old ebs snapshot without a "Device" tag will fail

Both of these issues can be mitigated by adding the "Device" tag manually in the AWS console. For any EBS snapshots, add a tag with "Device" as the key and "<device_name>" as the value, where <device_name> is the device name of the EBS volume holding the shared home directory (e.g. "Device" : "/dev/xvdf").

rsync strategy

• If any data stores are configured on the instance, BITBUCKET_DATA_STORES should be specified as an array of paths to data stores.
• If any data stores are configured on the instance, BITBUCKET_BACKUP_DATA_STORES should specify a location for for storing data store backups.

zfs strategy

• A new ZFS_FILESYSTEM_NAMES variable has been introduced, which is an array of ZFS filesystems (the shared home directory, and any configured data stores). It needs to contain the filesystem name of the shared home directory, which was previously stored in ZFS_HOME_TANK_NAME.
• If using these scripts for disaster recovery, a new variable ZFS_HOME_FILESYSTEM needs to be set. This should contain the name of the ZFS filesystem storing the shared home directory - the same value that was previously stored in ZFS_HOME_TANK_NAME.

Further reading

• Zero Downtime Backup
• Using Bitbucket Server DIY Backup
• Using Bitbucket Server DIY Backup in AWS