From 1814b878a0b26db09acc5f0f0550455769234b11 Mon Sep 17 00:00:00 2001
From: Asif Bacchus <asif@bacchus.cloud>
Date: Fri, 27 Nov 2020 01:38:34 -0700
Subject: [PATCH] entrypoint script

---
 entrypoint.sh | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 entrypoint.sh

diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..6f1bb82
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,109 @@
+#!/bin/sh
+#
+### entrypoint script for mariadb container
+#
+
+# instantiate variables
+sqlCmd='/tmp/cmd.sql'
+
+# generate root password if not specified
+if [ -z "$MYSQL_ROOT_PASSWORD" ]; then
+    MYSQL_ROOT_PASSWORD="$( head /dev/urandom | tr -dc A-Za-z0-9 | head -c32 )"
+    export MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
+fi
+
+# change mysql UID & GID
+sed -i "s/mysql:x:100:101/mysql:x:${MYSQL_UID}:${MYSQL_GID}/" /etc/passwd
+sed -i "s/mysql:x:101/mysql:x:${MYSQL_GID}/" /etc/group
+chown -R mysql:mysql /var/lib/mysql
+
+# execute pre-init scripts: /docker-entrypoint-preinit.d/*.sh
+for f in /docker-entrypoint-preinit.d/*.sh; do
+    if [ -s "$f" ]; then
+        printf "PRE-INIT: Executing %s\n" "$f"
+        /bin/sh "$f"
+    fi
+done
+
+# create socket file
+mkdir -p /run/mysqld > /dev/null 2>&1
+touch /run/mysqld/mysqld.dock
+chown -R mysql:mysql /run/mysqld
+
+# create database if one does not already exist
+if [ -z "$(ls -A /var/lib/mysql/ 2> /dev/null)" ]; then
+    # create SQL cmd file
+    touch "$sqlCmd"
+
+    # create system tables
+    printf "DB-CREATE: Setting up mySQL system tables\n"
+    mysql_install_db --user=mysql --ldata=/var/lib/mysql > /dev/null
+
+    # statement to create new SQL database
+    printf "DB-CREATE: Generating SQL database create statement for '%s'\n" "$MYSQL_DATABASE"
+    echo "CREATE DATABASE IF NOT EXISTS \'$MYSQL_DATABASE\' CHARACTER SET $MYSQL_CHARSET COLLATE $MYSQL_COLLATION;" >> "$sqlCmd"
+
+    # statements to:
+    # cleanup permissions:
+    #   leave root@localhost as root-account integrated,
+    #   add root@% with password authentication
+    # create SQL user if requested
+    # remove 'test' table
+    echo 'USE mysql;' >> "$sqlCmd"
+    echo 'FLUSH PRIVILEGES;' >> "$sqlCmd"
+    printf "DB-CREATE: Generating SQL permissions statement for 'root@%%'\n"
+    echo "GRANT ALL ON *.* TO 'root'@'%' IDENTIFIED BY '$MYSQL_ROOT_PASSWORD' WITH GRANT OPTION;" >> "$sqlCmd"
+    if [ -n "$MYSQL_USER" ] && [ -n "$MYSQL_PASSWORD" ]; then
+        printf "DB-CREATE: Generating SQL permissions statement for '%s'\n" "$MYSQL_USER"
+        echo "GRANT ALL ON \'$MYSQL_DATABASE\'.* TO \'$MYSQL_USER\'@'%' IDENTIFIED BY \'$MYSQL_PASSWORD\';" >> "$sqlCmd"
+    fi
+    printf "DB-CREATE: Cleaning up 'test' table\n"
+    echo 'DROP DATABASE IF EXISTS test;' >> "$sqlCmd"
+    echo 'FLUSH PRIVILEGES;' >> "$sqlCmd"
+
+    # execute statements against mariadb and cleanup
+    printf "DB-CREATE: Bootstrapping mySQL database\n"
+    mysqld --user=mysql --bootstrap --verbose=0 --skip-name-resolve --skip-networking=0 < "$sqlCmd"
+    rm -f "$sqlCmd"
+else
+    # files exist, ignore the request to create a database
+    printf "DB-CREATE: NOT creating %s\n" "$MYSQL_DATABASE"
+    printf "DB-CREATE: Using existing database\n"
+fi
+
+# process supplied SQL files in /docker-entrypoint-initdb.d/*.(sql|sql.gz)
+for f in /docker-entrypoint-initdb.d/*.sh; do
+    case "$f" in
+        *.sql)
+            if [ -s "$f" ]; then
+                printf "IMPORT-SQL: Importing %s\n" "$f"
+                mysqld --user=mysql --bootstrap --verbose=0 --skip-name-resolve --skip-networking=0 < "$f"
+                printf "\n"
+            fi
+            ;;
+        *.sql.gz)
+            if [ -s "$f" ]; then
+                printf "IMPORT-SQL: Importing %s\n" "$f"
+                gunzip -c "$f" | mysqld --user=mysql --bootstrap --verbose=0 --skip-name-resolve --skip-networking=0 < "$f"
+                printf "\n"
+            fi
+            ;;
+        *)
+            printf "IMPORT-SQL: Cannot import %s\n" "$f"
+            ;;
+    esac
+done
+
+# execute post-init scripts: /docker-entrypoint-postinit.d/*.sh
+for f in /docker-entrypoint-postinit.d/*.sh; do
+    if [ -s "$f" ]; then
+        printf "POST-INIT: Executing %s\n" "$f"
+        /bin/sh "$f"
+    fi
+done
+
+# execute commands passed to this container
+printf "\nInitialization complete... Container ready...\n"
+exec "$@"
+
+#EOF
\ No newline at end of file