Percona 5.6 Docker Image cannot load my /etc/mysql/conf.d/*.cnf

I am struggling on this issue for at least 14 hours so far :(.

I am configuring a build server with docker, jenkins, java, scala on top of CentOS 7.

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  • While working with liquibase and jooq:codegen, I need to have proper MySQL(Percona:5.6) containers setup, but unfortunately, it seems that Official Percona Image (Percona:5.6) does not load *.cnf files under /etc/mysql/conf.d properly, which I do think it is my issue, such as file permissions issues.

    I was following with the instructions from: Docker Hub: Percona
    Percona Official: Using a custom MySQL configuration file
    But it does not work for me, and I tried so many wrong ways, none was working.

    The file/folders permissions are like following picture:
    *.cnf files inside conf.d folder from hosting server

    After mounted into container, they are as following picture:
    *.cnf files inside /etc/mysql/conf.d inside Container

    And the docker-compose.yaml is as following:
    docker-compose.yaml

    The default my.cnf provided by Official Percona 5.6 is as following:

    root@25295730da09:/etc/mysql# cat my.cnf
    #
    # The MySQL database server configuration file.
    #
    # You can copy this to one of:
    # - "/etc/mysql/my.cnf" to set global options,
    # - "~/.my.cnf" to set user-specific options.
    #
    # One can use all long options that the program supports.
    # Run program with --help to get a list of available options and with
    # --print-defaults to see which it would actually understand and use.
    #
    # For explanations see
    # http://dev.mysql.com/doc/mysql/en/server-system-variables.html
    
    # This will be passed to all mysql clients
    # It has been reported that passwords should be enclosed with ticks/quotes
    # escpecially if they contain "#" chars...
    # Remember to edit /etc/mysql/debian.cnf when changing the socket location.
    [client]
    port        = 3306
    socket      = /var/run/mysqld/mysqld.sock
    
    # Here is entries for some specific programs
    # The following values assume you have at least 32M ram
    
    # This was formally known as [safe_mysqld]. Both versions are currently parsed.
    [mysqld_safe]
    socket      = /var/run/mysqld/mysqld.sock
    nice        = 0
    
    [mysqld]
    skip-host-cache
    skip-name-resolve
    #
    # * 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      = 16M
    max_allowed_packet  = 16M
    thread_stack        = 192K
    thread_cache_size       = 8
    # This replaces the startup script and checks MyISAM tables if needed
    # the first time they are touched
    myisam-recover         = BACKUP
    #max_connections        = 100
    #table_cache            = 64
    #thread_concurrency     = 10
    #
    # * Query Cache Configuration
    #
    query_cache_limit   = 1M
    query_cache_size        = 16M
    #
    # * 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
    #
    # Here you can see queries with especially long duration
    #slow_query_log_file = /var/log/mysql/mysql-slow.log
    #slow_query_log      = 1
    #long_query_time = 2
    #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   = include_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!
    #
    # * Security Features
    #
    # Read the manual, too, if you want chroot!
    # chroot = /var/lib/mysql/
    #
    # For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
    #
    # ssl-ca=/etc/mysql/cacert.pem
    # ssl-cert=/etc/mysql/server-cert.pem
    # ssl-key=/etc/mysql/server-key.pem
    
    
    
    [mysqldump]
    quick
    quote-names
    max_allowed_packet  = 16M
    
    [mysql]
    #no-auto-rehash # faster start of mysql but no tab completition
    
    [isamchk]
    key_buffer      = 16M
    
    #
    # * IMPORTANT: Additional settings that can override those from this file!
    #   The files must end with '.cnf', otherwise they'll be ignored.
    #
    !includedir /etc/mysql/conf.d/
    

    And my customization is as following:

    root@25295730da09:/etc/mysql/conf.d# cat my.cnf
    [mysqld]
    datadir=/var/lib/mysql
    socket=/var/lib/mysql/mysql.sock
    
    general_log_file        = /var/log/mysql/mysqld.log
    general_log             = 1
    
    log_bin_trust_function_creators=1
    max-connections = 5000
    
    max_allowed_packet=32M
    
    # CACHES AND LIMITS #
    tmp-table-size                 = 32M
    max-heap-table-size            = 32M
    query-cache-type               = 0
    query-cache-size               = 0
    max-connections                = 500
    thread-cache-size              = 50
    open-files-limit               = 65535
    table-definition-cache         = 1024
    table-open-cache               = 2048
    
    # INNODB #
    innodb-flush-method            = O_DIRECT
    innodb-log-files-in-group      = 2
    innodb-log-file-size           = 256M
    innodb-flush-log-at-trx-commit = 1
    innodb-file-per-table          = 1
    innodb-buffer-pool-size        = 128M
    
    
    #server_id=1
    #log-bin                        = /var/lib/mysql/mysql-bin/mysql-bin
    expire-logs-days               = 14
    sync-binlog                    = 1
    
    # Disabling symbolic-links is recommended to prevent assorted security risks
    symbolic-links=0
    
    # Settings user and group are ignored when systemd is used (fedora >= 15).
    # If you need to run mysqld under a different user or group,
    # customize your systemd unit file for mysqld according to the
    # instructions in http://fedoraproject.org/wiki/Systemd
    user=mysql
    lower_case_table_names=1
    # Semisynchronous Replication
    # http://dev.mysql.com/doc/refman/5.5/en/replication-semisync.html
    # uncomment next line on MASTER
    ;plugin-load=rpl_semi_sync_master=semisync_master.so
    # uncomment next line on SLAVE
    ;plugin-load=rpl_semi_sync_slave=semisync_slave.so
    
    # Others options for Semisynchronous Replication
    ;rpl_semi_sync_master_enabled=1
    ;rpl_semi_sync_master_timeout=10
    ;rpl_semi_sync_slave_enabled=1
    
    # http://dev.mysql.com/doc/refman/5.5/en/performance-schema.html
    ;performance_schema
    
    # Set default server character set
    
    character-set-server = utf8
    
    # Set default server collation
    
    collation-server = utf8_unicode_ci
    
    [mysqld_safe]
    log-error=/var/log/mysqld.log
    pid-file=/var/run/mysqld/mysqld.pid
    

    And my docker versions:

    [barry@eb-build linux-build-server]$ docker version
    Client:
     Version:      1.11.1
     API version:  1.23
     Go version:   go1.5.4
     Git commit:   5604cbe
     Built:        Wed Apr 27 00:34:42 2016
     OS/Arch:      linux/amd64
    
    Server:
     Version:      1.11.1
     API version:  1.23
     Go version:   go1.5.4
     Git commit:   5604cbe
     Built:        Wed Apr 27 00:34:42 2016
     OS/Arch:      linux/amd64
    [barry@eb-build linux-build-server]$ docker-compose version
    docker-compose version 1.7.1, build 0a9ab35
    docker-py version: 1.8.1
    CPython version: 2.7.9
    OpenSSL version: OpenSSL 1.0.1e 11 Feb 2013
    [barry@eb-build linux-build-server]$
    

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  • One Solution collect form web for “Percona 5.6 Docker Image cannot load my /etc/mysql/conf.d/*.cnf”

    the reason is because the directory: /etc/mysql/conf.d should have at least 555 permission.

    problems solved.

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