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Code Issues 6 Releases Wiki Activity

Update migration guide with better Postgres instructions (#659) 

If the Postgres username is different on the old server and the new server, then the previous migration guide was not correct. This fixes that.
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Nolan Lawson 2018-08-09 06:30:09 -07:00 committed by Eugen Rochko
parent f1c0dea836
commit 568a67ef2f
1 changed files with 22 additions and 0 deletions
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Running-Mastodon/Migration-guide.md
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@ -63,6 +63,28 @@ This will copy the Postgres database from the old system to the new one. You may
Note that you will need to re-run this process from scratch (i.e. on a fresh database) if the old database changes after the dump.
#### Dump and load as a different Postgres user
If the Postgres username on the old server is different from the Postgres username on the new server, then you will have to use a slightly different technique. Run this to dump:
```bash
pg_dump -Fc mastodon_production -f backup.dump
```
Create the database like normal:
```bash
createdb -T template0 mastodon_production
```
Then load the dump using a special mode where the new user overwrites the old user (`--no-owner --role=<new_username>`), and only public schemas are used (`-n public`):
```bash
pg_restore -U <new_username> -n public --no-owner --role=<new_username> -d mastodon_production backup.dump
```
(Replace `<new_username>` with the new Postgres username above.)
### Copy `system/` files
This will probably take some time, and you'll want to avoid re-copying unnecessarily, so using `rsync` is recommended. On your old machine, as the `mastodon` user, run: