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migration - add some documentation on limits regarding the database owner name

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Signed-off-by: Simon L <szaimen@e.mail.de>
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Simon L 2022-12-29 00:29:53 +01:00
parent 4750fb228f
commit 8ae4ec52a3
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migration.md
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@ -64,7 +64,8 @@ The procedure for migrating the files and the database works like this:
1. Type in `local::/your/old/datadir/` which should bring up the exact line where you need to modify the path to use the one used in Nextcloud AIO, instead.
1. Change it to look like this: `local::/mnt/ncdata/`.
1. Now save the file by pressing `[CTRL] + [o]` then `[ENTER]` and close nano by pressing `[CTRL] + [x]`
1. In order to make sure that everything is good, you can now run `grep "/your/old/datadir" database-dump.sql` which should not bring up further results.
1. In order to make sure that everything is good, you can now run `grep "/your/old/datadir" database-dump.sql` which should not bring up further results.<br>
1. **Please note:** Unfortunately it is not possible to import a database dump from a former database owner with the name `nextcloud`. You can check if that is the case with this command: `grep "Name: oc_appconfig; Type: TABLE; Schema: public; Owner:" database-dump.sql | grep -oP 'Owner:.*$' | sed 's|Owner:||;s| ||g'`. If it returns `nextcloud`, you need to rename the owner in the dump file manually. A command like the following should work, however please note that it is possible that it will overwrite wrong lines. You can thus first check which lines it will change with `grep "Owner: nextcloud$" database-dump.sql`. If only correct looking lines get returned, feel free to change them with `sed -i 's|Owner: nextcloud$|Owner: ncadmin|'`.
1. Next, copy the database dump into the correct place and prepare the database container which will import from the database dump automatically the next container start:
```
sudo rm /var/lib/docker/volumes/nextcloud_aio_database_dump/_data/database-dump.sql