xtrabackup doesn't read the socket information from the server configuration

[Hrvoje Matijakovic]

xtrabackup doesn't read the socket information from the server configuration even if it's there:

cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

This requires socket to be specified either in the client config or on the command line, otherwise backup fails:

xtrabackup --backup --target-dir=/tmp/backups --user=root
170216 10:32:53 version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup' as 'root' (using password: NO).
170216 10:32:53 version_check Connected to MySQL server
170216 10:32:53 version_check Executing a version check against the server...
170216 10:32:53 version_check Done.
170216 10:32:53 Connecting to MySQL server host: localhost, user: root, password: not set, port: not set, socket: not set
Failed to connect to MySQL server: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2).

[Sergei Glushchenko (sergei.glushchenko)]

xtrabackup will no longer read socket from server config, instead it will replicate behaviour of mysql cli. socket will be read from [client] section or from [xtrabackup] section. Default value will be set at the build time in packaging scripts as it is done for MySQL and PS.

[EvgeniyPatlan (evgeniy-patlan)]

Done.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PXB-496