我正在尝试为我的Node应用程序创建一个容器.这个应用程序使用MongoDB来确保一些数据持久性.

所以我创建了这个Dockerfile：

FROM    ubuntu:latest

# --- Installing MongoDB
# Add 10gen official apt source to the sources list
RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
RUN echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | tee /etc/apt/sources.list.d/10gen.list
# Hack for initctl not being available in Ubuntu
RUN dpkg-divert --local --rename --add /sbin/initctl
RUN ln -s /bin/true /sbin/initctl
# Install MongoDB
RUN apt-get update
RUN apt-get install mongodb-10gen
# Create the MongoDB data directory
RUN mkdir -p /data/db
CMD ["usr/bin/mongod", "--smallfiles"]

# --- Installing Node.js

RUN apt-get update
RUN apt-get install -y python-software-properties python python-setuptools ruby rubygems
RUN add-apt-repository ppa:chris-lea/node.js

# Fixing broken dependencies ("nodejs : Depends: rlwrap but it is not installable"):
RUN echo "deb http://archive.ubuntu.com/ubuntu precise universe" >> /etc/apt/sources.list

RUN echo "deb http://us.archive.ubuntu.com/ubuntu/ precise universe" >> /etc/apt/sources.list
RUN apt-get update
RUN apt-get install -y nodejs 

# Removed unnecessary packages
RUN apt-get purge -y python-software-properties python python-setuptools ruby rubygems
RUN apt-get autoremove -y

# Clear package repository cache
RUN apt-get clean all

# --- Bundle app source
ADD . /src
# Install app dependencies
RUN cd /src; npm install

EXPOSE  8080
CMD ["node", "/src/start.js"]

然后我构建并启动整个过程：

$sudo docker build -t aldream/myApp
$sudo docker run aldream/myApp

但是机器显示以下错误：

[error] Error: failed to connect to [localhost:27017]

知道我做错了什么吗？谢谢！

最佳答案 你实际上docker运行aldream / myApp吗？在这种情况下,使用您提供的Dockerfile,它应该运行MongODB,而不是您的应用程序.是否有另一个CMD命令或另一个Dockerfile,或者您正在运行docker run aldream / myApp< somethingelse>？在后一种情况下,它将覆盖CMD指令并且不会启动MongoDB.

如果要在单个容器中运行多个进程,则需要一个进程管理器(例如Supervisor,god,monit)或者从脚本开始后台进程;例如.：

#!/bin/sh
mongod &
node myapp.js &
wait