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Improve borg backup instructions

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Olivér Falvai 2022-04-12 20:14:12 +02:00 committed by GitHub
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docs/configuring-playbook-backup-borg.md
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@ -4,17 +4,23 @@ The playbook can install and configure [borgbackup](https://www.borgbackup.org/)
BorgBackup is a deduplicating backup program with optional compression and encryption. BorgBackup is a deduplicating backup program with optional compression and encryption.
That means your daily incremental backups can be stored in a fraction of the space and is safe whether you store it at home or on a cloud service. That means your daily incremental backups can be stored in a fraction of the space and is safe whether you store it at home or on a cloud service.
The backup will run based on `matrix_backup_borg_schedule` var (systemd timer calendar), default: 4am every day You will need a remote server where borg will store the backups. There are hosted, borg compatible solutions available, such as [BorgBase](https://www.borgbase.com).
The backup will run based on `matrix_backup_borg_schedule` var (systemd timer calendar), default: 4am every day.
## Prerequisites ## Prerequisites
1. Create ssh key on any machine: 1. Create a new SSH key:
```bash ```bash
ssh-keygen -t ed25519 -N '' -f matrix-borg-backup -C matrix ssh-keygen -t ed25519 -N '' -f matrix-borg-backup -C matrix
``` ```
2. Add public part of that ssh key to your borg provider / server: This can be done on any machine and you don't need to place the key in the `.ssh` folder. It will be added to the Ansible config later.
2. Add the **public** part of this SSH key (the `matrix-borg-backup.pub` file) to your borg provider/server:
If you plan to use a hosted solution, follow their instructions. If you have your own server, copy the key over:
```bash ```bash
# example to append the new PUBKEY contents, where: # example to append the new PUBKEY contents, where:
@ -35,17 +41,21 @@ matrix_backup_borg_location_repositories:
matrix_backup_borg_storage_encryption_passphrase: "PASSPHRASE" matrix_backup_borg_storage_encryption_passphrase: "PASSPHRASE"
matrix_backup_borg_ssh_key_private: | matrix_backup_borg_ssh_key_private: |
PRIVATE KEY PRIVATE KEY
matrix_backup_borg_location_source_directories:
- "{{ matrix_base_data_path }}"
``` ```
where: where:
* USER - ssh user of a provider / server * USER - SSH user of a provider/server
* HOST - ssh host of a provider / server * HOST - SSH host of a provider/server
* REPO - borg repository name, it will be initialized on backup start, eg: `matrix` * REPO - borg repository name, it will be initialized on backup start, eg: `matrix`
* PASSPHRASE - super-secret borg passphrase, you may generate it with `pwgen -s 64 1` or use any password manager * PASSPHRASE - passphrase used for encrypting backups, you may generate it with `pwgen -s 64 1` or use any password manager
* PRIVATE KEY - the content of the public part of the ssh key you created before * PRIVATE KEY - the content of the **private** part of the SSH key you created before
Check the `roles/matrix-backup-borg/defaults/main.yml` for the full list of available options `matrix_backup_borg_location_source_directories` defines the list of directories to back up, `{{ matrix_base_data_path }}` is the base directory for every service's data, such as Synapse, Postgres and the bridges. You might want to exclude certain directories or file patterns from the backup using the `matrix_backup_borg_location_exclude_patterns` variable.
Check the `roles/matrix-backup-borg/defaults/main.yml` file for the full list of available options.
## Installing ## Installing