unable to connect to database

hi,
my mail error.logs show it cant connect to the database, i also noted this issue when trying to install a script, the prolem is localhost dose not work in some cases but 127.0.0.1 will work,
but i dont dont know where to make the changes to solve these issues:

Code:

server1 dovecot: auth-worker(30554): Error: mysql(localhost): Connect failed to database (dbispconfig): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) - waiting for 1 seconds before retry

Code:

server1 amavis[2319]: (02319-01) (!!)TROUBLE in process_request: connect_to_sql: unable to connect to any dataset at (eval 110) line 253.

please advise

 

any idea how i can fix the socket so i can avold changing to IP? the socket should use 127.0.0.1 by default right?

UPDATE: Sorry forgot to add this error from the log:

Code:

server1 postfix/proxymap[2303]: warning: connect to mysql server 127.0.0.1: Access denied for user 'ispconfig'@'127.0.0.1' (using password: YES)

 

I dont know why im having this problem too, the only changes i have made is to optimise performance, see my mariadb 50-server.cnf below.

Code:

#
# These groups are read by MariaDB server.
# Use it for options that only the server (but not clients) should see
#
# See the examples of server my.cnf files in /usr/share/mysql/
#

# this is read by the standalone daemon and embedded servers
[server]

# this is only for the mysqld standalone daemon
[mysqld]
performance_schema=ON
performance-schema-instrument='stage/%=ON'
performance-schema-consumer-events-stages-current=ON
performance-schema-consumer-events-stages-history=ON
performance-schema-consumer-events-stages-history-long=ON

# Skip reverse DNS lookup of clients
#skip-name-resolve=1

#
# * Basic Settings
#
user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket        = /var/run/mysqld/mysqld.sock
port        = 3306
basedir        = /usr
datadir        = /var/lib/mysql
tmpdir        = /tmp
lc-messages-dir    = /usr/share/mysql
skip-external-locking

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address        = 127.0.0.1

#
# * Fine Tuning
#
key_buffer_size        = 15524M
max_allowed_packet    = 1024M
net_buffer_length    = 100k
thread_stack        = 192K
thread_cache_size       = 8
table_open_cache = 3734
table_definition_cache = 3000
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam_recover_options  = BACKUP
max_connections        = 500
#table_cache            = 64
#thread_concurrency     = 10

join_buffer_size = 3M
sort_buffer_size = 4M
read_buffer_size = 4M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 4M
tmp_table_size = 2116M
max_heap_table_size = 2116M
max_seeks_for_key = 2000
open_files_limit = 10824
flush_time = 3600
low_priority_updates=1
#
# * Query Cache Configuration
#
query_cache_type    = 0
query_cache_limit    = 512k
query_cache_size        = 0M

#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Enable the slow query log to see queries with especially long duration
slow_query_log=1
slow_query_log_file= /var/log/mysql/mariadb-slow.log
#log_slow_queries    = /var/log/mysql/log-slow.log
long_query_time = 2
#log_slow_rate_limit    = 1000
#log_slow_verbosity    = query_plan
log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id        = 1
#log_bin            = /var/log/mysql/mysql-bin.log
expire_logs_days    = 10
max_binlog_size   = 100M
#binlog_do_db        = include_database_name
#binlog_ignore_db    = exclude_database_name

#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#innodb_additional_mem_pool_size = 160M
innodb_buffer_pool_size = 1912M
innodb_buffer_pool_instances = 1
#innodb_file_per_table = 1
innodb_log_file_size = 239M
#innodb_log_buffer_size = 2M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 30
#innodb_file_format = barracuda
#innodb_thread_concurrency = 4
#innodb_force_recovery = 1
#innodb_use_sys_malloc = 0
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates you can use for example the GUI tool "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
#
# Accept only connections using the latest and most secure TLS protocol version.
# ..when MariaDB is compiled with OpenSSL:
# ssl-cipher=TLSv1.2
# ..when MariaDB is compiled with YaSSL (default in Debian):
# ssl=on

#
# * Character sets
#
# MySQL/MariaDB default is Latin1, but in Debian we rather default to the full
# utf8 4-byte character set. See also client.cnf
#
character-set-server  = utf8mb4
collation-server      = utf8mb4_general_ci

#
# * Unix socket authentication plugin is built-in since 10.0.22-6
#
# Needed so the root database user can authenticate without a password but
# only when running as the unix root user.
#
# Also available for other users if required.
# See https://mariadb.com/kb/en/unix_socket-authentication-plugin/

# this is only for embedded server
[embedded]

# This group is only read by MariaDB servers, not by MySQL.
# If you use the same .cnf file for MySQL and MariaDB,
# you can put MariaDB-only options here
[mariadb]

# This group is only read by MariaDB-10.1 servers.
# If you use the same .cnf file for MariaDB of different versions,
# use this group for options that older servers don't understand
[mariadb-10.1]

 

I restored backup of 50-server.cnf file, but this has know effect, the mail error log still shows:

Code:

server1 dovecot: auth-worker(4598): Error: mysql(localhost): Connect failed to database (dbispconfig): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) - waiting for 5 seconds before retry

 

yes and yes to answer your questions, this is a strange problem, is their an output that could show what is going on?

 

yes i did that too

 

no, just notices and warnings, but no errors

 

Have you checked if you can login from the command line using the mysql details provided inside the dovecot/amavis config?

 

HEy Mr Croydon haha,
no i have not dont that, not sure how but will will give it a try.

 

mysql -u <userfromconfig> -D dbispconfig -p
-> enter password from config

 

thanks, yes i was able to login via command line.

A bit strange, i just noticed the in the dovecot directory, most files are owned by root:root and 3 files root:dovecote, is this right, should they all not be the same?

 

found another user with same iusse.
https://www.howtoforge.com/community/threads/dovecot-mysql-error.80722/#post-390981