I was trying to install MySQL on MacOS and I followed the instructions to install it via Homebrew:
$ brew install mysql
Pretty easy, but then as I worked along I screwed something up where I could not load mysql in the command line. I would get the following error:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
So I do the logical step of uninstalling and reinstalling:
$ brew uninstall mysql
$ brew install mysql
I still get the same error. Two hours of browsing StackOverflow later, I figured it out. I failed to notice the following errors during reinstallation:
2019-02-21T01:02:48.455076Z 0 [System] [MY-013169] [Server] /usr/local/Cellar/mysql/8.0.15/bin/mysqld (mysqld 8.0.15) initializing of server in progress as process 18070
2019-02-21T01:02:48.457920Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
2019-02-21T01:02:48.457929Z 0 [ERROR] [MY-013236] [Server] Newly created data directory /usr/local/var/mysql/ is unusable. You can safely remove it.
2019-02-21T01:02:48.457994Z 0 [ERROR] [MY-010119] [Server] Aborting
2019-02-21T01:02:48.458203Z 0 [System] [MY-010910] [Server] /usr/local/Cellar/mysql/8.0.15/bin/mysqld: Shutdown complete (mysqld 8.0.15) Homebrew.
This is the key line:
Newly created data directory /usr/local/var/mysql/ is unusable. You can safely remove it.
What do I do? Remove that directory!
$ sudo rm -rf /usr/local/var/mysql/
Then run the post install script:
$ brew postinstall mysql
And voilà, mysql loads!
$ mysql -uroot
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.15 Homebrew
Learn from my fail.
inphamous development 