MySQL 8: datadir
murrayeisenberg at gmail.com
Sun Oct 4 14:57:01 UTC 2020
Trouble was in my.cnf I had specified
pid-file = /opt/local/var/run/mysq8/mysqld.pid
but apparently mysqld could not write to that directory — even though I had previously executed
sudo chown -R _mysql:_mysql /opt/local/var/run/mysql8/
and when I checked there the correct ownership was in effect.
By commenting out the “pid-file=…” line in my.cnf, the mysql8-server starts normally and I can connect to it with the mysql (= mysql8) client.
Still somewhat mysterious!
> On 4 Oct2020, at 4:03 AM, Ryan Schmidt <ryandesign at macports.org> wrote:
> On Oct 3, 2020, at 12:05, Murray Eisenberg wrote:
>> On 3 Oct2020, at 8:00 AM,Andrew Udvare wrote:
>>> Your client is trying to connect
>>> /opt/local/var/run/mysql57/mysqld.sock instead of
>>> /opt/local/var/run/mysql8/mysqld.sock . Your client is not finding the
>>> correct socket path in my.cnf. You can specify which socket to connect
>>> to manually:
>>> mysql -S /opt/local/var/run/mysql8/mysqld.sock ...
>>> If you are running mysql8, does /opt/local/var/run/mysql8/mysqld.sock
>>> exist? It may be that your my.cnf says to put it at the old path.
>> (a) No, there is no such file /opt/local/var/run/mysql8/mysql.sock !
>> After loading mysql8-server, the only files in /opt/local/var/run/mysql8 are .turd_mysql8-server and mysqld.pid.
>> How is that file created?
> The server creates the socket file when it starts.
> The file mysqld.pid presumably contains a process ID number. Is there a process currently running with that process ID number? If yes, is it mysqld? If there is no such process, or if it is not mysqld, try deleting mysqld.pid.
>> (b) Manually specifying the socket gives the same kind of error as before:
>> sudo port load mysql8-server
>> ---> Loading startupitem 'mysql8-server' for mysql8-server
>> mysql -S /opt/local/var/run/mysql8/mysqld.sock
>> ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/opt/local/var/run/mysql8/mysqld.sock' (2)
> Then I guess there is no such socket file, perhaps because your server has not started.
Murray Eisenberg murrayeisenberg at gmail.com
503 King Farm Blvd #101 Home (240)-246-7240
Rockville, MD 20850-6667 Mobile (413)-427-5334
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