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Mention Postgres backup

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Slavi Pantaleev 2021-01-22 13:58:55 +02:00
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CHANGELOG.md
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@ -30,20 +30,22 @@ By default, the playbook runs an integrated Postgres server for you in a contain
To migrate to the new setup, expect a few minutes of downtime, while you follow these steps: To migrate to the new setup, expect a few minutes of downtime, while you follow these steps:
1. Generate a strong password to be used for your superuser Postgres user (called `matrix`). You can use `pwgen -s 64 1` to generate it, or some other tool. 1. We believe the steps below are safe and you won't encounter any data loss, but consider [making a Postgres backup](docs/maintenance-postgres.md#backing-up-postgresql) anyway. If you've never backed up Postgres, now would be a good time to try it.
2. Update your playbook's `inventory/host_vars/matrix.DOMAIN/vars.yml` file, adding a line like this: 2. Generate a strong password to be used for your superuser Postgres user (called `matrix`). You can use `pwgen -s 64 1` to generate it, or some other tool.
3. Update your playbook's `inventory/host_vars/matrix.DOMAIN/vars.yml` file, adding a line like this:
```yaml ```yaml
matrix_postgres_connection_password: YOUR_POSTGRES_PASSWORD_HERE matrix_postgres_connection_password: YOUR_POSTGRES_PASSWORD_HERE
``` ```
.. where `YOUR_POSTGRES_PASSWORD_HERE` is to be replaced with the password you generated during step #1. .. where `YOUR_POSTGRES_PASSWORD_HERE` is to be replaced with the password you generated during step #1.
3. Stop all services: `ansible-playbook -i inventory/hosts setup.yml --tags=stop` 4. Stop all services: `ansible-playbook -i inventory/hosts setup.yml --tags=stop`
4. Log in to the server via SSH. The next commands will be performed there. 5. Log in to the server via SSH. The next commands will be performed there.
5. Start the Postgres database server: `systemctl start matrix-postgres` 6. Start the Postgres database server: `systemctl start matrix-postgres`
6. Open a Postgres shell: `/usr/local/bin/matrix-postgres-cli` 7. Open a Postgres shell: `/usr/local/bin/matrix-postgres-cli`
7. Execute the following query, while making sure to **change the password inside**: 8. Execute the following query, while making sure to **change the password inside**:
```sql ```sql
CREATE ROLE matrix LOGIN SUPERUSER PASSWORD 'YOUR_POSTGRES_PASSWORD_HERE'; CREATE ROLE matrix LOGIN SUPERUSER PASSWORD 'YOUR_POSTGRES_PASSWORD_HERE';
@ -51,7 +53,7 @@ CREATE ROLE matrix LOGIN SUPERUSER PASSWORD 'YOUR_POSTGRES_PASSWORD_HERE';
.. where `YOUR_POSTGRES_PASSWORD_HERE` is to be replaced with the password you generated during step #1. .. where `YOUR_POSTGRES_PASSWORD_HERE` is to be replaced with the password you generated during step #1.
8. Execute the following queries as you see them (no modifications necessary, so you can just paste them): 9. Execute the following queries as you see them (no modifications necessary, so you can just paste them):
```sql ```sql
CREATE DATABASE matrix OWNER matrix; CREATE DATABASE matrix OWNER matrix;
@ -71,7 +73,7 @@ ALTER ROLE synapse NOSUPERUSER NOCREATEDB NOCREATEROLE;
You may need to press *Enter* after pasting the lines above. You may need to press *Enter* after pasting the lines above.
1. Re-run the playbook normally: `ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start` 10. Re-run the playbook normally: `ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start`
### What do I do if I'm using an external Postgres server? ### What do I do if I'm using an external Postgres server?