erlang 启动

docker容器是否退出跟容器的主进程有关，主进程结束后，容器就exit了，那么erlang in docker时，erl shell做为主进程，erl shell 需以前台方式启动，此时docker run必须指定-t以监听shell输入，否则docker run -d erlang erl会立刻exit，应该用docker run -dt erlang erl才能保持容器在后台运行。

当用docker swarm 创建服务时，不能指定-t，那么erlang集群容器就会exit，此时需要将erl启动命令改为noshell 启动，即erl -noshell -name xxx即可。

docker swarm中erlang集群互联

TODO

以下是各种脚本：

build.sh

#!/bin/bash

git checkout .
chmod +x rebar
chmod +x ./docker/start.sh
make deps
make clean
cp ./docker/Dockerfile ./../Dockerfile
docker rmi songcf/scene:v1 --force
docker build -t="songcf/scene:v1" ./../
rm -f ./../Dockerfile

Dockerfile

FROM erlang:latest

MAINTAINER Docker SongCF <fuxiao333@qq.com>

ENV SOURCE_DIR /jh/source/scene/
WORKDIR $SOURCE_DIR
COPY ./scene $SOURCE_DIR

EXPOSE 9901
EXPOSE 9911

RUN ["chmod", "+x", "rebar"]
RUN ["make"]
RUN ["make", "g"]
RUN ["make"]

ENTRYPOINT ["/bin/bash", "./docker/start.sh"]
CMD ["./docker/start.sh"]

start.sh

#!/bin/bash

# 1.更改leader_selection：app_id
sed -i "s/platform_scene_app_id/$LEADER_SELECT_APP_ID/g" scripts/scene.config
# 2.更改mysql配置
sed -i "s/localhost/$MYSQL_IP/g" scripts/scene.configsed -i "s/port, 3306/port, $MYSQL_PORT/g" scripts/scene.config
# 3.更改erlang node ip
# 按照自己的网络更改 |grep 10.0|grep /24
# ip a|grep inet|grep 10.0|grep /24|awk '{print $2}'|awk -F"/" '{print $1}'
NODE_IP=$(ip a|grep inet|grep ${SUBNET}|grep ${SUBNET_MASK}|awk '{print $2}'|awk -F"/" '{print $1}')
erl -noshell -pa ebin -pa deps/*/ebin -name scene@${NODE_IP} -config scripts/scene.config -s scene

boot

# sigle start
docker run -d \
           --name platform_scene \
           -w /jh/source/scene/ \
           -e LEADER_SELECT_APP_ID=dockerswarm_platform_scene \
           -e MYSQL_IP=127.0.0.1 \
           -e MYSQL_PORT=3306 \
           -e SUBNET=127.0 \
           -e SUBNET_MASK=/8 \
           songcf/scene:v1

# docker swarm service
docker network create -d overlay --subnet 10.0.9.0/24 --opt encrypted net-scene
curl -X DELETE http://127.0.0.1:10001/api/v1/leaderselect/dockerswarm_platform_scene
docker service create \
           --name platform_scene \
           --replicas 2 \
           --network net-scene \
           -e LEADER_SELECT_APP_ID=dockerswarm_platform_scene \
           -e MYSQL_IP=192.168.31.96 \
           -e MYSQL_PORT=3306 \
           -e SUBNET=10.0 \
           -e SUBNET_MASK=/24 \
           songcf/scene:v1