April 09, 2020
brew upgrade postgresql brew postgresql-upgrade-database
After updating, PostgreSQL, I got this following in error.
$ psql psql: error: could not connect to server: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
Once in a while, I get this error, but I always google it try to remove
postmaster.pid, reinstall postgres, removing that folder, and so on.
And spent couple of hours tackling, and then magically with the combination of that and this command I could make my server run again.
So I finally decided to see the logs, and check what was actually happening.
And understood it was a very simple problem:
$ tail /usr/local/var/log/postgres.log 2020-04-09 13:47:48.385 JST  FATAL: database files are incompatible with server 2020-04-09 13:47:48.385 JST  DETAIL: The data directory was initialized by PostgreSQL version11, which is not compatible with this version 12.2.
The data directory was not compatible with the older version.
And after 1 minute of googling I found that the way to migrate the database to the newer version was kindly written in the
$ brew info postgresql postgresql: stable 12.2 (bottled), HEAD Object-relational database system https://www.postgresql.org/ /usr/local/Cellar/postgresql/12.2 (3,218 files, 37.3MB) * Poured from bottle on 2020-04-09 at 13:47:38 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/postgresql.rb ==> Dependencies Build: pkg-config ✔ Required: icu4c ✔, krb5 ✔, firstname.lastname@example.org ✔, readline ✔ ==> Options --HEAD Install HEAD version ==> Caveats To migrate existing data from a previous major version of PostgreSQL run: brew postgresql-upgrade-database To have launchd start postgresql now and restart at login: brew services start postgresql Or, if you don't want/need a background service you can just run: pg_ctl -D /usr/local/var/postgres start ==> Analytics install: 103,855 (30 days), 264,272 (90 days), 1,020,149 (365 days) install-on-request: 99,081 (30 days), 248,397 (90 days), 945,833 (365 days) build-error: 0 (30 days)
Just follow the command.
And normally you are good to go 😉