Remove bundled MySQL client and related docs

Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

changelogs/unreleased/remove-mysql-client.yml

+---
+title: Remove bundled MySQL client and related docs
+merge_request: 3382
+author:
+type: deprecated

config/software/gitlab-rails.rb

@@ -53,7 +53,6 @@ dependency 'graphicsmagick'
 dependency 'exiftool'
 if EE
-  dependency 'mysql-client'
   dependency 'pgbouncer'
   dependency 'repmgr'
   dependency 'repmgr_pg_10'

config/software/mysql-client.rb

-#
-# Copyright:: Copyright (c) 2013 Robby Dyer
-# Copyright:: Copyright (c) 2014 GitLab.com
-# License:: Apache License, Version 2.0
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-name 'mysql-client'
-default_version '5.5.56'
-
-license 'GPL-2.0'
-license_file 'COPYING'
-
-skip_transitive_dependency_licensing true
-
-# Runtime dependecies
-dependency 'openssl'
-dependency 'zlib'
-dependency 'ncurses'
-
-source  url: "http://dev.mysql.com/get/Downloads/MySQL-5.5/mysql-#{version}.tar.gz",
-        md5: '76a393f1aee0d57bf71e1a7414200233'
-
-relative_path "mysql-#{version}"
-
-env = with_standard_compiler_flags(with_embedded_path)
-env['CXXFLAGS'] = "-L#{install_dir}/embedded/lib -I#{install_dir}/embedded/include"
-env['CPPFLAGS'] = "-L#{install_dir}/embedded/lib -I#{install_dir}/embedded/include"
-
-# Force CentOS-5 to use gcc/g++ v4.4
-if ohai['platform'] =~ /centos/ && ohai['platform_version'] =~ /^5/
-  env['CC'] = 'gcc44'
-  env['CXX'] = 'g++44'
-end
-
-if ohai['platform'] =~ /ubuntu/ && ohai['platform_version'] =~ /^18\.04/
-  env['CC'] = '/usr/bin/gcc-6'
-  env['CXX'] = '/usr/bin/g++-6'
-end
-
-build do
-  command [
-    'cmake',
-    '-DCMAKE_SKIP_RPATH=YES',
-    "-DCMAKE_INSTALL_PREFIX=#{install_dir}/embedded",
-    '-DWITH_SSL=system',
-    '-DWITH_READLINE=1',
-    "-DOPENSSL_INCLUDE_DIR:PATH=#{install_dir}/embedded/include",
-    "-DOPENSSL_LIBRARIES:FILEPATH=#{install_dir}/embedded/lib/libssl.so",
-    '-DWITH_ZLIB=system',
-    "-DZLIB_INCLUDE_DIR:PATH=#{install_dir}/embedded/include",
-    "-DZLIB_LIBRARY:FILEPATH=#{install_dir}/embedded/lib/libz.so",
-    "-DCRYPTO_LIBRARY:FILEPATH=#{install_dir}/embedded/lib/libcrypto.so",
-    '.'
-  ].join(' '), env: env
-
-  %w(libmysql client include).each do |target|
-    command "make -j #{workers} install", env: env, cwd: "#{project_dir}/#{target}"
-  end
-end

doc/settings/database.md

@@ -4,20 +4,12 @@
 Omnibus GitLab has a bundled PostgreSQL server and PostgreSQL is the preferred
 database for GitLab.
-GitLab supports the following database management systems:
-- PostgreSQL
-- MySQL/MariaDB
-
-Thus you have three options for database servers to use with Omnibus GitLab:
+GitLab supports only PostgreSQL database management system.
+Thus you have two options for database servers to use with Omnibus GitLab:
 - Use the packaged PostgreSQL server included with GitLab Omnibus (no configuration required, recommended)
 - Use an [external PostgreSQL server](#using-a-non-packaged-postgresql-database-management-server)
-- Use an [external MySQL server with Enterprise Edition package](#using-a-mysql-database-management-server-enterprise-edition-only) (not supported in 12.1+)
-
-If you are planning to use MySQL/MariaDB, make sure to read the [introductory
-paragraph](#using-a-mysql-database-management-server-enterprise-edition-only)
-before proceeding, as it contains some useful information.
 ## Configuring SSL
@@ -354,59 +346,6 @@ To change the location of the PostgreSQL data
 1. Run `gitlab-ctl reconfigure`.
 1. Start GitLab `gitlab-ctl start`.
-## Using a MySQL database management server (Enterprise Edition only)
-
->**Note:**
-GitLab 12.0 is the last version with support for MySQL (and MariaDB). Users will
-need to [migrate][mysql-migrate] to PostgreSQL in order to utilize future versions. 
-
-The MySQL server itself is _not_ shipped with Omnibus ([PostgresSQL is](#database-settings)), you will have to install
-it on your own or use an existing one. Omnibus ships only the MySQL client.
-
-Make sure that GitLab's MySQL database collation is UTF-8, otherwise you could
-hit [collation issues][ee-245]. See
-[Set MySQL collation to UTF-8](#set-mysql-collation-to-utf-8) to fix any
-relevant errors.
-
----
-
-The following guide assumes that you want to use MySQL or MariaDB and are using
-the **GitLab Enterprise Edition packages**.
-
->**Important note:**
-If you are connecting Omnibus GitLab to an existing GitLab database you should
-[create a backup][rake-backup] before attempting this procedure.
-
-1. First, set up your database server according to the [upstream GitLab
-   instructions][mysql-install]. If you want to keep using an existing GitLab
-   database you can skip this step.
-
-1. Next, add the following settings to `/etc/gitlab/gitlab.rb`:
-
-    ```ruby
-    # Disable the built-in Postgres
-    postgresql['enable'] = false
-
-    # Fill in the values for database.yml
-    gitlab_rails['db_adapter'] = 'mysql2'
-    gitlab_rails['db_encoding'] = 'utf8'
-    gitlab_rails['db_host'] = '127.0.0.1'
-    gitlab_rails['db_port'] = 3306
-    gitlab_rails['db_username'] = 'USERNAME'
-    gitlab_rails['db_password'] = 'PASSWORD'
-    ```
-
-    `db_adapter` and `db_encoding` should be like the example above. Change
-    all other settings according to your MySQL setup.
-
-    >**Note:**
-    `/etc/gitlab/gitlab.rb` should have file permissions `0600` because it contains
-    plain-text passwords.
-
-1. [Reconfigure GitLab][] for the changes to take effect.
-
-1. (Optionally) [Seed the database](#seed-the-database-fresh-installs-only).
-
 ## Seed the database (fresh installs only)
 **This is a destructive command; do not run it on an existing database!**

lib/gitlab/license/analyzer.rb

@@ -19,7 +19,6 @@ module License
       'libtool',            # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
       'logrotate',          # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
       'rsync',              # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
-      'mysql-client',       # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
       'repmgr',             # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
       'repmgr_pg_10',       # GPL Mere Aggregate Exception - https://www.gnu.org/licenses/gpl-faq.en.html#MereAggregation
       'blob',               # MIT Licensed - https://github.com/webmodules/blob/blob/master/LICENSE