114 lines
2.4 KiB
Markdown
114 lines
2.4 KiB
Markdown
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# upgrading postgresql on arch (in case you fucked up)
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```sh
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stop postgresql
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stop akkoma # make sure nothing is trying to hit the database
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```
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## pg_upgrade will fail if you initdb with different params
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so i'd made a file-level backup at least
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```sh
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sudo mv /var/lib/postgres/data /var/lib/postgres/olddata
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```
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i tried to
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```
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sudo mkdir /var/lib/postgres/data /var/lib/postgres/tmp
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sudo chown postgres:postgres /var/lib/postgres/data /var/lib/postgres/tmp
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sudo -iu postgres
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cd /var/lib/postgres/tmp
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initdb -D /var/lib/postgres/data --locale=en_US.UTF-8 --encoding=UTF8 --data-checksums
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```
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this caused pg_upgrade to fail because the old data didn't have `--data-checksums` enabled
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## pg_dumpall will fail with extensions like rum
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ok so that didn't work, let's try the manual dump and reload. exit out of the postgres session and back to your user
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```sh
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yay -S postgresql-old-upgrade
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sudo rm -r /var/lib/postgres/data
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sudo mkdir /var/lib/postgres/data
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sudo chown -R postgres:postgres /var/lib/postgres/data
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sudo -iu postgres
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initdb -D /var/lib/postgres/data
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/opt/pgsql-14/bin/pg_ctl -D /var/lib/postgres/olddata/ start
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```
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the old version should be running now
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```sh
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pg_dumpall -h /tmp -f /tmp/old_backup.sql
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```
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aaaaand this failed because of something to do with pg_rum
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## downgrading to get a good dump
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ok let's kill the old postgres
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```sh
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sudo killall postgres
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```
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copy the old data over and set permissions
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```sh
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sudo rm -r /var/lib/postgres/data
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sudo cp -r /var/lib/postgres/olddata /var/lib/postgres/data
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sudo chown -R postgres:postgres /var/lib/postgres/data
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```
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downgrade to the last version of postgres
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```sh
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yay -S downgrade
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sudo downgrade postgresql
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start postgresql
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```
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dump
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```sh
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pg_dumpall > /tmp/dumpall.sql
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```
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now we can upgrade again?
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```sh
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stop postgresql
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yay -S postgresql
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yay -S pg_rum # do a clean build?
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```
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now we try to restore data
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```
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sudo rm -r /var/lib/postgres/data
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sudo mkdir /var/lib/postgres/data
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sudo chown -R postgres:postgres /var/lib/postgres/data
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sudo -Hu postgres initdb -D /var/lib/postgres/data --locale=en_US.UTF-8 --encoding=UTF8 --data-checksums
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start postgresql
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sudo -Hu postgres psql -f /tmp/dumpall.sql template1
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```
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this worked for me
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## etc
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while you're here you might as well update and migrate akkoma if you're still running that?
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```sh
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sudo -Hu akkoma MIX_ENV=prod mix deps.get
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sudo -Hu akkoma MIX_ENV=prod mix ecto.migrate
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start akkoma
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```
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