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February 17, 2019 02:05
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Upgrade PostgreSQL 9.6.5 to 10.0 using Homebrew (macOS)
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After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work. | |
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0." | |
Database files have to be updated before starting the server, here are the steps that had to be followed: | |
# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default | |
brew unlink postgresql | |
brew install postgresql@9.6 | |
brew unlink postgresql@9.6 | |
brew link postgresql | |
# move 9.6.x db files to another directory | |
mv /usr/local/var/postgres /usr/local/var/postgres96 | |
# init new database using 10.0 | |
initdb /usr/local/var/postgres -E utf8 | |
# make timezone and timezonesets directories available for 9.6.x installation | |
mkdir /usr/local/share/postgresql96 | |
cp -r /usr/local/share/postgresql/timezone /usr/local/share/postgresql96 | |
cp -r /usr/local/share/postgresql/timezonesets /usr/local/share/postgresql96 | |
# finally the actual upgrade | |
# -b is the old binary dir, -B is the new binary dir | |
# -d is the old data dir, -D is the new data dir | |
pg_upgrade -b /usr/local/Cellar/postgresql@9.6/9.6.5/bin -B /usr/local/Cellar/postgresql/10.0/bin -d /usr/local/var/postgres96 -D /usr/local/var/postgres | |
# start 10.0 to check that upgrade works | |
pg_ctl start -D /usr/local/var/postgres | |
# cleanup if upgrade was successful | |
brew uninstall postgresql@9.6 | |
rm -rf /usr/local/var/postgres96 | |
rm -rf /usr/local/share/postgresql96 |
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