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57 lines
1.9 KiB
Markdown
57 lines
1.9 KiB
Markdown
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# Setting up borg backup (optional)
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The playbook can install and configure [borgbackup](https://www.borgbackup.org/) with [borgmatic](https://torsion.org/borgmatic/) for you.
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BorgBackup is a deduplicating backup program with optional compression and encryption.
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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.
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The backup will run based on `matrix_backup_borg_schedule` var (systemd timer calendar), default: 4am every day
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## Prerequisites
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1. Create ssh key on any machine:
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```bash
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ssh-keygen -t ed25519 -N '' -f matrix-borg-backup -C matrix
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```
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2. Add public part of that ssh key to your borg provider / server:
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```bash
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# example to append the new PUBKEY contents, where:
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# PUBKEY is path to the public key,
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# USER is a ssh user on a provider / server
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# HOST is a ssh host of a provider / server
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cat PUBKEY | ssh USER@HOST 'dd of=.ssh/authorized_keys oflag=append conv=notrunc'
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```
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## Adjusting the playbook configuration
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Minimal working configuration (`inventory/host_vars/matrix.DOMAIN/vars.yml`) to enable borg backup:
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```yaml
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matrix_backup_borg_enabled: true
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matrix_backup_borg_location_repositories:
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- USER@HOST:REPO
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matrix_backup_borg_storage_encryption_passphrase: "PASSPHRASE"
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matrix_backup_borg_ssh_key_private: |
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PRIVATE KEY
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```
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where:
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* USER - ssh user of a provider / server
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* HOST - ssh host of a provider / server
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* REPO - borg repository name, it will be initialized on backup start, eg: `matrix`
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* PASSPHRASE - super-secret borg passphrase, you may generate it with `pwgen -s 64 1` or use any password manager
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* PRIVATE KEY - the content of the public part of the ssh key you created before
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Check the `roles/matrix-backup-borg/defaults/main.yml` for the full list of available options
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## Installing
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After configuring the playbook, run the [installation](installing.md) command again:
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```
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ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
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```
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