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在docker容器中使用非root用户运行进程

uid permissions docker

Veerendra K · 技术社区 · 6 年前

我正在构建redis sentinal图像 run.sh 应以非root用户身份运行

跑上海

  while true; do
    master=$(redis-cli -h ${REDIS_SENTINEL_SERVICE_HOST} -p ${REDIS_SENTINEL_SERVICE_PORT} --csv SENTINEL get-master-addr-by-name mymaster | tr ',' ' ' | cut -d' ' -f1)
    if [[ -n ${master} ]]; then
      master="${master//\"}"
    else
      master=$(hostname -i)
    fi

    redis-cli -h ${master} INFO
    if [[ "$?" == "0" ]]; then
      break
    fi
    echo "Connecting to master failed.  Waiting..."
    sleep 10
  done

  sentinel_conf=/home/ubuntu/sentinel.conf

  echo "sentinel monitor mymaster ${master} 6379 2" > ${sentinel_conf}
  echo "sentinel down-after-milliseconds mymaster 60000" >> ${sentinel_conf}
  echo "sentinel failover-timeout mymaster 180000" >> ${sentinel_conf}
  echo "sentinel parallel-syncs mymaster 1" >> ${sentinel_conf}
  echo "bind 0.0.0.0" >> ${sentinel_conf}

  redis-sentinel ${sentinel_conf} --protected-mode no
}

function launchslave() {
  while true; do
    master=$(redis-cli -h ${REDIS_SENTINEL_SERVICE_HOST} -p ${REDIS_SENTINEL_SERVICE_PORT} --csv SENTINEL get-master-addr-by-name mymaster | tr ',' ' ' | cut -d' ' -f1)
    if [[ -n ${master} ]]; then
      master="${master//\"}"
    else
      echo "Failed to find master."
      sleep 60
      exit 1
    fi
    redis-cli -h ${master} INFO
    if [[ "$?" == "0" ]]; then
      break
    fi
    echo "Connecting to master failed.  Waiting..."
    sleep 10
  done
  sed -i "s/%master-ip%/${master}/" /redis-slave/redis.conf
  sed -i "s/%master-port%/6379/" /redis-slave/redis.conf
  redis-server /redis-slave/redis.conf --protected-mode no

Dockerfile

FROM alpine:3.4

RUN apk add --no-cache redis sed bash busybox-suid
#su: must be suid to work properly
COPY redis-master.conf /redis-master/redis.conf
COPY redis-slave.conf /redis-slave/redis.conf
RUN adduser -D ubuntu
USER ubuntu
COPY run.sh /home/ubuntu/run.sh
CMD [ "sh", "/home/ubuntu/run.sh" ]
ENTRYPOINT [ "bash", "-c" ]

我部署在Openshift中。容器正在不断重启,我也没有看到任何日志。我以前看过一些日志,当“run.sh”是root(默认)时,即没有提到任何 adduser 在里面 Dockerfile文件 。

1 回复 | 直到 6 年前

nickgryg 6 年前

根据 docker documentation :

Both CMD and ENTRYPOINT instructions define what command gets executed when running a container.
There are few rules that describe their co-operation:
1. Dockerfile should specify at least one of CMD or ENTRYPOINT commands.
2. CMD will be overridden when running the container with alternative arguments.

CMD 和 ENTRYPOINT 以上各层完全不同 Dockerfile 所以 入口点 覆盖 CMD命令 这就是为什么 CMD命令 永远不会执行层。

只需删除 入口点 来自的图层 Dockerfile文件 ,此处不需要:

FROM alpine:3.4

RUN apk add --no-cache redis sed bash busybox-suid
#su: must be suid to work properly
COPY redis-master.conf /redis-master/redis.conf
COPY redis-slave.conf /redis-slave/redis.conf
RUN adduser -D ubuntu
USER ubuntu
COPY run.sh /home/ubuntu/run.sh
CMD [ "sh", "/home/ubuntu/run.sh" ]

更新时间:

我看到了 [[ ]] 用于 run.sh 剧本该建筑工程 bash ,不在 sh 。这就是为什么 Dockerfile文件 应符合以下要求:

FROM alpine:3.4

RUN apk add --no-cache redis sed bash busybox-suid
#su: must be suid to work properly
COPY redis-master.conf /redis-master/redis.conf
COPY redis-slave.conf /redis-slave/redis.conf
RUN adduser -D ubuntu
USER ubuntu
COPY run.sh /home/ubuntu/run.sh
CMD [ "bash", "/home/ubuntu/run.sh" ]