Migrate MariaDB to S6 supervisor

mariadb/Dockerfile

@@ -6,9 +6,14 @@ RUN \
  addgroup -S -g 3306 mysql \
  && adduser -S -u 3306 -h /var/lib/mysql -s /bin/nologin -g mysql -G mysql mysql \
  # Install MariaDB
- && apk --no-cache add mariadb mariadb-client
+ && apk --no-cache add mariadb mariadb-client s6 \
+ # Create socket directory
+ && mkdir /run/mysqld \
+ && chown mysql:mysql /run/mysqld
+
+COPY docker/ /
 
 VOLUME ["/etc/mysql", "/var/lib/mysql"]
 EXPOSE 3306
 
-CMD ["mysqld_safe"]
+CMD ["s6-svscan", "/etc/services.d"]

mariadb/docker/etc/services.d/.s6-svscan/finish

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/bin/true

mariadb/docker/etc/services.d/mariadb/run

@@ -0,0 +1,5 @@
+#!/bin/execlineb -P
+
+fdmove -c 2 1
+s6-setuidgid 3306:3306
+/usr/bin/mysqld