我应该如何创建一个Dockerfile在一个实例中运行多个服务？ [英] How should I create a Dockerfile to run more than one services in one instance?

问题描述

我正在尝试创建一个Dockerfile。我是Docker的新手。我正在创建此Dockerfile，它将在一个实例中启动Rabbitmq，ftp服务器和elasticsearch服务器。我已经创建了这样的文件：

I'm trying to create a Dockerfile. I'm new to Docker. I'm creating this Dockerfile which shall start rabbitmq, ftp server and elasticsearch server in one instance. I have created the file like this :

# Pull base image
FROM alpine:latest
MAINTAINER Harshit Prasad

# define commonly used JAVA_HOME variable
ENV JAVA_HOME /usr/lib/jvm/java-8-oracle

# Expose the web interface ports
# 2121: ftp, a FTP server to be used for mass data / file storage
# 5672: rabbitmq, a rabbitmq message queue server to be used for global messages, queues and stacks
# 9300: elastic, an elasticsearch server or main cluster address for global database storage
EXPOSE 2121 5672 9300

# install Java
RUN \
  echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
  add-apt-repository -y ppa:webupd8team/java && \
  apt-get update && \
  apt-get install -y oracle-java8-installer && \
  rm -rf /var/lib/apt/lists/* && \
  rm -rf /var/cache/oracle-jdk8-installer

# install apache ftp server 1.1.0
RUN wget http://www-eu.apache.org/dist/mina/ftpserver/1.1.0/dist/apache-ftpserver-1.1.0.tar.gz
RUN tar xfz apache-ftpserver-1.1.0.tar.gz

# run ftp server
RUN cd apache-ftpserver-1.1.0 bin/ftpd.sh res/conf/ftpd-typical.xml

# install RabbitMQ server
RUN wget https://www.rabbitmq.com/releases/rabbitmq-server/v3.6.6/rabbitmq-server-generic-unix-3.6.6.tar.xz
RUN tar xf rabbitmq-server-generic-unix-3.6.6.tar.xz

# run the RabbitMQ server
RUN cd rabbitmq_server-3.6.6/sbin/rabbitmq-server

# install the management plugin to be able to use a web interface
RUN cd rabbitmq_server-3.6.6/sbin/rabbitmq-plugins enable rabbitmq_management

# install erlang programming language. RabbitMQ is written in erlang.
RUN apt-get install erlang

# elasticsearch service here

# set current working directory to yacy_grid_mcp
RUN git clone https://github.com/yacy/yacy_grid_mcp.git
WORKDIR /yacy_grid_mcp

我想知道是否m正确创建Dockerfile。如果有人可以帮助我，那就太好了。另外，请告诉我如何继续添加Elasticsearch服务。

I wanted to know if I'm creating Dockerfile correctly. It would be great if anyone can help me out. Also please let me know how should I proceed for adding elasticsearch service. Thanks in advance!

推荐答案

我应该如何创建一个Dockerfile来同时运行多个服务实例？

How should I create a Dockerfile to run more than one services in one instance?

您不应该。

Docker容器不是完整的虚拟机运行完整的应用程序实例和服务堆栈。

A docker container is not a full virtual machine to run a complete stack of application instances and services.

Docker是应用程序虚拟化。这意味着一个容器运行一个进程。

Docker is application virtualization. That means a single container runs a single process.

在您的情况下，您需要3个容器。一个用于RabbitMQ，一个用于FTP服务，一个用于弹性搜索。

In your case, you need 3 containers. One for RabbitMQ, one for your FTP service, one for elastic search.

您可能想要使用命名的数据卷在FTP服务和服务器之间共享文件系统。无论读什么，也是如此。

You'll probably want to use named data volumes to share the file system between the FTP service and whatever reads it, as well.

一旦所有三个容器都工作了，就可以使用docker-compose简化它们一起运行。

Once you have all three containers working, you can use docker-compose to simplify running them together.

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