docker: add entrypoint to redis

Author: dsame

docker/redis/Dockerfile

@@ -4,8 +4,10 @@ RUN addgroup -S redis && adduser -S -G redis redis
 RUN apk add --no-cache redis
 
 COPY redis.conf /etc/redis/redis.conf
+COPY entrypoint.sh /docker-entrypoint.sh
 
 ENV PORT=6379
 ENV SLAVEOF=
 
+ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["redis-server", "/etc/redis/redis.conf"]

docker/redis/entrypoint.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+sed -i.bak "s/^port .*$/port ${PORT}/" /etc/redis/redis.conf && rm /etc/redis/redis.conf.bak
+if [ "x$SLAVEOF" != x ];then
+echo "slaveof $SLAVEOF" >> /etc/redis/redis.conf
+fi 
+
+chown redis:redis /etc/redis/redis.conf
+cat /etc/redis/redis.conf
+echo $@
+exec $@