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Add note about synapse-janitor and require explicit confirmation for usage

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Fixes #465 (Github Issue).

Related to https://github.com/xwiki-labs/synapse_scripts/pull/12.
This commit is contained in:
Slavi Pantaleev 2020-04-21 21:48:06 +03:00
parent 554da8338a
commit 9991d545dd
2 changed files with 14 additions and 1 deletions
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docs/maintenance-synapse.md
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@ -8,11 +8,17 @@ Table of contents:
- [Purging old data with the Purge History API](#purging-old-data-with-the-purge-history-api), for when you wish to delete in-use (but old) data from the Synapse database
- [Compressing state with rust-synapse-compress-state](#compressing-state-with-rust-synapse-compress-state), for when you wish to compress some Synapse state tables using the [rust-synapse-compress-state](https://github.com/matrix-org/rust-synapse-compress-state) tool
- [Synapse maintenance](#synapse-maintenance)
- [Purging unused data with synapse-janitor](#purging-unused-data-with-synapse-janitor)
- [Vacuuming Postgres](#vacuuming-postgres)
- [Purging old data with the Purge History API](#purging-old-data-with-the-purge-history-api)
- [Compressing state with rust-synapse-compress-state](#compressing-state-with-rust-synapse-compress-state)
## Purging unused data with synapse-janitor
**NOTE**: There are [reports](https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/465) that **synapse-janitor is dangerous to use and causes database corruption**. You may wish to refrain from using it.
When you **leave** and **forget** a room, Synapse can clean up its data, but currently doesn't.
This **unused and unreachable data** remains in your database forever.

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roles/matrix-postgres/tasks/run_synapse_janitor.yml
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@ -7,6 +7,13 @@
msg: "Postgres via the matrix-postgres role is not enabled (`matrix_postgres_enabled`). Cannot run synapse-janitor."
when: "not matrix_postgres_enabled|bool"
- name: Fail if not aware of the risks
fail:
msg: >-
Using Synapse Janitor is considered dangerous and may break your database.
See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/465.
If you'd like to run it anyway, add `--extra-vars='i_know_synapse_janitor_is_dangerous=1'` to your command.
when: "i_know_synapse_janitor_is_dangerous|default('') == ''"
# Defaults