4

I am trying to create a container for my Node app. This app uses MongoDB to ensure some data persistence. So I created this 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"]

Then I build and launch the whole thing through:

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

But the machine displays the following error:

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

Any idea what I am doing wrong? Thanks!

4

2 回答 2

1

你真的docker run 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，或者另一个 Dockerfile，或者你正在运行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。

如果你想在单个容器中运行多个进程，你需要一个进程管理器（例如 Supervisor、god、monit）或者从脚本在后台启动进程；例如：

#!/bin/sh
mongod &
node myapp.js &
wait
于 2013-10-24T04:20:50.297 回答
1

重新定义你的 Dockerfile 如下；

COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf

# ENTRYPOINT should not be used as it wont allow commands from run to be executed

# Define mountable directories.
VOLUME ["/data/db"]

# Expose ports.
#   - 27017: process
#   - 28017: http
#   - 9191: web app
EXPOSE 27017 28017 9191

ENTRYPOINT ["/usr/bin/supervisord"]

supervisord.conf 将包含以下内容；

[supervisord]
nodaemon=true

[program:mongod]
command=/usr/bin/mongod --smallfiles
stdout_logfile=/var/log/supervisor/%(program_name)s.log
stderr_logfile=/var/log/supervisor/%(program_name)s.log
autorestart=true

[program:nodejs]
command=nodejs /opt/app/server/server.js
于 2015-01-07T20:37:59.573 回答