CentOS7+Docker+Redis3环境搭建

创建一个redis docker容器

首先，我们先为redis创建一个Dockerfile文件和fix-permissions.sh文件

Dockerfile：

# "ported" by Adam Miller <[email protected]> from
#   https://github.com/fedora-cloud/Fedora-Dockerfiles
#
# Originally written for Fedora-Dockerfiles by
#   Aditya Patawari <[email protected]>

FROM centos:centos7
MAINTAINER The CentOS Project <[email protected]>

RUN yum -y update; yum clean all
RUN yum -y install epel-release; yum clean all
RUN yum -y install redis; yum clean all

EXPOSE 6379

# log on stdout instead of writing to file
RUN sed -i 's/^\(logfile\s*\).*$/\1""/g' /etc/redis.conf

# Fix permissions to allow for running on openshift
COPY fix-permissions.sh ./
RUN ./fix-permissions.sh /var/log/redis/ && \
    ./fix-permissions.sh /var/lib/redis/

# By default will run as random user on openshift and the redis user (997)
# everywhere else
USER 997
	
ENTRYPOINT ["redis-server"]
CMD ["/etc/redis.conf", "--bind", "0.0.0.0"]

Dockerfile相关教程地址（官方GitHub地址） Dockerfile

fix-permissions.sh：(记得给文件加上执行权限（sudo chmod +x fix-permissions.sh）)

<span style="font-size:18px;">#!/bin/sh
# Taken from https://raw.githubusercontent.com/openshift/sti-base/master/bin/fix-permissions
# Fix permissions on the given directory to allow group read/write of 
# regular files and execute of directories.
chgrp -R 0 $1
chmod -R g+rw $1
find $1 -type d -exec chmod g+x {} +</span>

接着,构建镜像

<span style="font-size:18px;">docker build -t centos7/redis:centos7 .</span>

查看镜像是否安装成功

到此，redis的镜像就已经安装成功了。

运行实例

docker run -d -p 6379:6379 centos7/redis:centos7

创建多实例

docker run -d -p 6479:6479 centos7/redis:centos7

进入容器

先查询出Pid是什么：

 docker inspect --format "{{ .State.Pid}}" <container-id>

然后通过得到的Pid执行

 nsenter --target 6537 --mount --uts --ipc --net --pid

进入到容器里面；

直接通过输入：redis-cli就可以连上redis了。

[root@localhost ~]# docker inspect --format "{{ .State.Pid}}" e5a90a839f40
6537
[root@localhost ~]# nsenter --target 6537 --mount --uts --ipc --net --pid
[root@e5a90a839f40 /]# redis-cli
127.0.0.1:6379> 

安装就到这里了，怎么用，在下一篇博客再继续说！