May 30, 2020

Create an CentOS Docker image with Apache services using Dockerfile

Use Dockerfile to create an CentOS Docker image with Apache services

List of files prepared on the host:

Dockerfile

# Start the ssh and apache Service the corner book
run.sh

The above files are placed in /root/apache_centos

mkdir -p /root/apache_centos
cd /root/apache_centos

Base mirror: a mirror of the open SSH service based on mirroring centos

[root@localhost apache_centos]# docker images
REPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZE
sshd        dockerfile     411d5fb16366    23 hours ago    278 MB
centos       latest       0f73ae75014f    5 weeks ago     172.3 MB

1. Prepare run.sh documents

Create a new run.sh directory in /root/apache_centos

vim run.sh

It reads as follows:

#!/bin/bash
/usr/sbin/sshd &
/usr/local/apache2/bin/httpd -D FOREGROUND

2. Prepare Dockerfile

Create a new Dockerfile in /root/apache_centos

vim Dockerfile

The contents of the document are as follows:

# The newly generated image is based on sshd:dockerfile The mirror
FROM sshd:dockerfile
MAINTAINER by Steven
# The installation wget
RUN yum install -y wget
WORKDIR /usr/local/src
# Download and unzip the source package
RUN wget http://apache.fayea.com/httpd/httpd-2.4.17.tar.gz
RUN tar -zxvf httpd-2.4.17.tar.gz
WORKDIR httpd-2.4.17
# Compile the installation apache
RUN yum install -y gcc make apr-devel apr apr-util apr-util-devel pcre-devel
RUN ./configure --prefix=/usr/local/apache2 --enable-mods-shared=most --enable-so
RUN make
RUN make install
# Modify the apache The configuration file
RUN sed -i 's/#ServerName www.example.com:80/ServerName localhost:80/g' /usr/local/apache2/conf/httpd.conf
# Start the apache service
RUN /usr/local/apache2/bin/httpd
# Copy the service startup script and set the permissions
ADD run.sh /usr/local/sbin/run.sh
RUN chmod 755 /usr/local/sbin/run.sh
# open 80 port
EXPOSE 80
CMD ["/usr/local/sbin/run.sh"]

Note that you cannot use the “cd” command to change the current directory in the Dockerfile file. Instead, use “WORKDIR”.

3. Mirror

docker build -t apache_dockerfile:centos .

View the generated image:

[root@localhost apache_centos]# docker images
REPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZE
apache_dockerfile  centos       f8f30b4a0ee8    24 minutes ago   440 MB
apache       centos       f92c55dddd07    17 hours ago    423.9 MB
sshd        dockerfile     411d5fb16366    23 hours ago    278 MB
centos       latest       0f73ae75014f    5 weeks ago     172.3 MB

4. Create a container based on the image and test it

1. Generate a new container

 docker run -d -p 2222:22 -p 8000:80 apache_dockerfile:centos /usr/local/sbin/run.sh

Map port 22 and port 80 of the container to port 2222 and port 8000 on the host, respectively, and run the service script.

2. View the newly generated container:

mkdir -p /root/apache_centos
cd /root/apache_centos

3, test,

Test apache

mkdir -p /root/apache_centos
cd /root/apache_centos

Success!

Test ssh

mkdir -p /root/apache_centos
cd /root/apache_centos

Success!