我正在尝试为 Node 应用创建容器。此应用使用 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"]
然后我通过以下方式构建并启动整个事情:
$ 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!
答案 0 :(得分: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)或从脚本开始后台进程; e.g:
#!/bin/sh
mongod &
node myapp.js &
wait
答案 1 :(得分:1)
重新定义您的Dockerfile,如下所示;
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