upgrade to Mariadb 10.11 now Wordpress only connects to DB on 127.0.0.1

[akira9000]

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upgrade to Mariadb 10.11 now Wordpress only connects to DB on 127.0.0.1

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE

Alma 9.8, Plesk 18.0.78, Maria DB 10.11.18

PROBLEM DESCRIPTION

Upgraded Maria DB to 10.11.18 from the default 10.5.x that was on the machine. Used the built in Plesk GUI - not command line.

I have about 8 live Wordpress sites active.

Upgrade process said success.

Plesk responded no problem. Admin no problem. All wordpress sites show "error conneting to DB" warning in the borwser. The same message you see if you get the DB password wrong in wpconfig for example.

Changed from "localhost" to "127.0.0.1" in wpconfig and all sites behave normally.

STEPS TO REPRODUCE

Have done on a second machine today - exactly the same result.

ACTUAL RESULT

WP sites no longer connect to the DB with localhost. Have to use 127.0.0.1

Plesk admin no problem, machine behaves completely normally otherwise, allows reboots and mariadb restart etc. No lockups, just cant connect on localhost

EXPECTED RESULT

I just want my WP sites to use their exiating DB connection data

ANY ADDITIONAL INFORMATION

(DID NOT ANSWER QUESTION)

YOUR EXPECTATIONS FROM PLESK SERVICE TEAM

Help with sorting out

 

[Sebahat.hadzhi]

Hi, @akira9000 . Has any customization been applied to SELinux on the server in question? Could you please provide the output from:

dnf list installed | grep selinux
ls -Z /usr/sbin/mariadbd