#20 - Add MySQL

.github/Dockerfile

@@ -13,13 +13,19 @@ FROM ghcr.io/joomlatools/jt-base:latest AS base
 ARG DEBIAN_FRONTEND=noninteractive
 
 # HTTP Apache
-EXPOSE 8080
-# HTTPS Apache
-EXPOSE 8443
+EXPOSE 8080 8443
 # HTTP Swoole - FastCGI
 EXPOSE 8081
 # HTTP Swoole - Webhooks
 EXPOSE 8082
+# MySQL
+EXPOSE 3306 33060
+
+# Install MySQL
+COPY ./config/mysql /etc/mysql/
+
+RUN apt-get install -y --no-install-recommends mysql-server php7.4-mysql; \
+     /bin/bash -e /var/scripts/mysql_initialize.sh \
 
 ##
 # Stage: build

config/mysql/my.cnf

@@ -0,0 +1,20 @@
+#
+# The MySQL  Server configuration file.
+#
+# For explanations see
+# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
+
+[mysqld]
+user             = mysql
+pid-file         = /var/run/mysqld/mysqld.pid
+socket           = /var/run/mysqld/mysqld.sock
+port             = 3306
+secure-file-priv = NULL
+default-time-zone = SYSTEM
+
+# Make sure Data Dictionary is cross platform
+# https://dev.mysql.com/doc/refman/8.0/en/identifier-case-sensitivity.html
+lower_case_table_names = 1
+
+# Custom config should go here
+!includedir /etc/mysql/conf.d/

config/s6/cont-init.d/110-mysql.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/with-contenv bash
+
+# https://github.com/docker-library/mysql/issues/275#issuecomment-292208567
+# > mysqld --verbose --help | grep bind-address
+
+file="${0##*/}"
+
+MYSQL_DATA_DIR=$APP_VOLUME/mysql
+MYSQL_PID_FILE=/var/run/mysqld/mysqld.pid
+
+# Remove stale MySQL PID file left behind when docker stops container
+if [[ -f $MYSQL_PID_FILE ]]; then
+	rm -f $MYSQL_PID_FILE
+fi
+
+# Initialize MySQL data directory (if needed)
+# See https://dev.mysql.com/doc/refman/8.0/en/data-directory-initialization.html
+if [[ ! -d $MYSQL_DATA_DIR ]]; then
+
+  echo "[cont-init.d] ${file}: An empty or uninitialized MySQL volume is detected in ${MYSQL_DATA_DIR}"
+  echo "[cont-init.d] ${file}: Installing MySQL in ${MYSQL_DATA_DIR} ..."
+  mkdir $MYSQL_DATA_DIR
+  chown --reference=/var/lib/mysql $MYSQL_DATA_DIR
+  chmod --reference=/var/lib/mysql $MYSQL_DATA_DIR
+  cp -R -p /var/lib/mysql/* $MYSQL_DATA_DIR
+
+fi
+
+# Grant or revoke passwordless remote access
+/usr/bin/mysqld_safe --datadir=$MYSQL_DATA_DIR --user=mysql -D
+if [[ $APP_ENV = "development" ]]
+then
+  echo "[cont-init.d] ${file}: Granting remote access of MySQL database from any IP address"
+  /usr/bin/mysql -u root -e "
+    CREATE USER IF NOT EXISTS 'root'@'%';
+    GRANT ALL ON *.* TO 'root'@'%';
+    FLUSH PRIVILEGES;
+    "
+else
+  echo "[cont-init.d] ${file}: Revoking remote access of MySQL database from any IP address"
+   /usr/bin/mysql -u root -e -f "
+      REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'root'@'%';
+      DROP USER IF EXISTS 'root'@'%';
+      "
+fi
+
+/usr/bin/mysqladmin -u root shutdown

config/s6/cont-init.d/120-php.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/with-contenv bash
+
+phpenmod -v 7.4 pdo_mysql

config/s6/services.d/mysql/down-signal

@@ -0,0 +1 @@
+SIGQTERM

config/s6/services.d/mysql/finish

@@ -0,0 +1,12 @@
+#!/usr/bin/execlineb -S1
+#https://danyspin97.org/blog/getting-started-with-execline-scripting/
+
+# @see https://github.com/just-containers/s6-overlay/issues/101
+
+# Rely on container platform to restart this container on crash (marathon/docker-swarm/kubernetes)
+# BUT, when container is SIGNALLED to stop, don't interfere
+if { s6-test ${1} -ne 0 }
+if { s6-test ${1} -ne 256 }
+
+# When mysql process dies, the container should come down with it
+s6-svscanctl -t /var/run/s6/services

config/s6/services.d/mysql/log/run

@@ -0,0 +1,3 @@
+#!/usr/bin/execlineb -P
+
+sed "s/^/[mysql] /" --unbuffered

config/s6/services.d/mysql/reload-signal

@@ -0,0 +1 @@
+SIGUP

config/s6/services.d/mysql/run

@@ -0,0 +1,35 @@
+#!/usr/bin/execlineb -P
+#https://danyspin97.org/blog/getting-started-with-execline-scripting/
+
+### Commands
+# https://dev.mysql.com/doc/refman/8.0/en/unix-signal-response.html#server-signal-response
+# https://skarnet.org/software/s6/s6-svc.html
+
+# SIGUP: Reload the grant tables and to flush tables, logs, the thread cache, and the host cache
+# > s6-svc -h /var/run/s6/services/mysql
+
+# SIGUSR2: Shutdown
+# > s6-svc -t /var/run/s6/services/mysql
+
+# Status
+# https://skarnet.org/software/s6/s6-svstat.html
+# > s6-svstat /var/run/s6/services/mysql
+
+# Explicitly load container environment
+with-contenv
+
+foreground
+{
+    importas -D production APP_ENV APP_ENV
+    echo "Starting MySQL with environment:" $APP_ENV
+}
+
+fdmove -c 2 1 # redirect stderr into stdout
+
+trap -x
+{
+  term { mysqladmin -u root shutdown }
+}
+
+importas -D /mnt/www APP_VOLUME APP_VOLUME
+exec /usr/bin/mysqld_safe --datadir=${APP_VOLUME}/mysql --user=mysql

config/scripts/mysql_initialize.sh

@@ -0,0 +1,26 @@
+#!/bin/bash -e
+
+#-------------------------------------------------------------------
+# Initialize mysql (if there is no datadir present).
+#-------------------------------------------------------------------
+
+MYSQL_DATA_DIR=${APP_VOLUME:=/mnt/www}/mysql
+MYSQL_RUN_DIR=/var/run/mysqld
+
+# Make sure lib dir exists
+if [[ ! -d $MYSQL_DATA_DIR ]]; then
+	mkdir -p $MYSQL_DATA_DIR
+fi
+
+# Make sure run dir exists
+if [[ ! -d $MYSQL_RUN_DIR ]]; then
+	mkdir -p $MYSQL_RUN_DIR
+fi
+
+# Ensure that /var/run/mysqld (used for socket and lock files) is writable
+chown -R mysql:mysql $MYSQL_RUN_DIR $MYSQL_DATA_DIR
+chmod 1777 $MYSQL_RUN_DIR $MYSQL_DATA_DIR
+
+# Initialize MySQL data directory (if needed)
+# See https://dev.mysql.com/doc/refman/8.0/en/data-directory-initialization.html
+/usr/bin/mysqld_safe --initialize-insecure --datadir=${MYSQL_DATA_DIR} --user=mysql

docker-compose.yml

@@ -23,4 +23,6 @@ services:
       - "8080:8080"  # HTTP Apache
       - "8443:8443"  # HTTPS Apache
       - "8081:8081"  # HTTP Service - FastCGI
-      - "8082:8082"  # HTTP Service - Webhooks
+      - "8082:8082"  # HTTP Service - Webhooks
+      - "3306:3306"    # MySQL
+      - "33060:33060"  # MySQL - X Plugin