小知识：Docker容器简单部署nginx过程解析

1、容器中部署nginx服务

centos：7镜像运行一个容器，并且，在这个容器内部署nginx服务。

[root@docker ~]# docker pull centos:7 //下载镜像

[root@docker ~]# docker run -itd –name webapp –restart=always centos:7 //运行一个容器名为:webapp

[root@docker ~]# docker cp nginx-1.16.0.tar.gz webapp:/root //将本地nginx包导入webapp容器内

[root@docker ~]# docker exec -it webapp /bin/bash //进入容器

[root@85099880dabe ~]# tar zxf nginx-1.16.0.tar.gz

[root@85099880dabe ~]# cd nginx-1.16.0

[root@85099880dabe nginx-1.16.0]# yum install gcc pcre pcre-devel zlib zlib-devel openssl openssl-devel //下载相关依赖包

[root@85099880dabe nginx-1.16.0]# useradd -m -s /sbin/nologin nginx //添加一个没有登录权限的nginx用户

[root@85099880dabe nginx-1.16.0]# ./configure –prefix=/usr/local/nginx –user=nginx –group=nginx //编译安装

[root@85099880dabe nginx-1.16.0]# make && make install //编译安装

[root@85099880dabe nginx-1.16.0]# ln -s /usr/local/nginx/sbin/* /usr/local/sbin/ //创建软链接

[root@85099880dabe nginx-1.16.0]# nginx

[root@85099880dabe nginx-1.16.0]# nginx //确认nginx服务开启

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

[root@85099880dabe nginx-1.16.0]# cd /usr/local/nginx/html/

[root@85099880dabe html]# echo “test web” > index.html

[root@85099880dabe html]# curl 127.0.0.1

test web

2、迁移镜像

所需环境：

docker1主机：192.168.45.129

docker2主机：192.168.45.134

1）docker1主机

将docker1的刚刚创建的容器并制作成镜像导入docker2主机上

[root@docker ~]# docker commit webapp myweb //将webapp容器制作成镜像名为myweb

sha256:b035b8e8a36140e1bdbda9cf3a736b139ea8a48db7871a10f509b8f34d4c0f82

[root@docker ~]# docker save > myweb.tar myweb:latest //将镜像导出

[root@docker ~]# scp myweb.tar 192.168.45.134:/root //将镜像导出的tar包cp给docker2主机

the authenticity of host 192.168.45.134 (192.168.45.134) cant be established.

ecdsa key fingerprint is d7:77:71:90:34:25:c0:ec:e0:b6:5c:cc:6b:44:93:7b.

are you sure you want to continue connecting (yes/no)? yes

warning: permanently added 192.168.45.134 (ecdsa) to the list of known hosts.

root@192.168.45.134s password: //密码为docker2主机的密码

myweb.tar 100% 353mb 176.4mb/s 00:02

2）docker2主机

[root@docker2 ~]# docker load < myweb.tar //将刚刚cp过来的tar包制作成镜像

[root@docker2 ~]# docker run -itd –name newweb myweb:latest //启动一个容器

[root@docker2 ~]# docker exec -it newweb /bin/bash //进入容器

[root@4e419b580248 /]# nginx

[root@4e419b580248 /]# nginx //确定已启动nginx服务

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] bind() to 0.0.0.0:80 failed (98: address already in use)

nginx: [emerg] still could not bind()

[root@4e419b580248 /]# curl 127.0.0.1

test web

注：这里我们可以看见在docker1主机容器中搭建的简单nginx环境并制作成镜像成功的迁移到了docker2主机上了

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：https://blog.51cto.com/14306186/2513103