1、容器中部署nginx服務(wù)

centos：7鏡像運行一個容器，并且，在這個容器內(nèi)部署Nginx服務(wù)。

[root@Docker ~]# docker pull centos:7 //下載鏡像
[root@Docker ~]# docker run -itd --name webapp --restart=always centos:7 //運行一個容器名為:webapp
[root@Docker ~]# docker cp nginx-1.16.0.tar.gz webapp:/root //將本地nginx包導(dǎo)入webapp容器內(nèi)
[root@Docker ~]# docker exec -it webapp /bin/bash //進(jìn)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 //下載相關(guān)依賴包
[root@85099880dabe nginx-1.16.0]# useradd -M -s /sbin/nologin nginx //添加一個沒有登錄權(quán)限的nginx用戶
[root@85099880dabe nginx-1.16.0]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx //編譯安裝

[root@85099880dabe nginx-1.16.0]# make && make install //編譯安裝
[root@85099880dabe nginx-1.16.0]# ln -s /usr/local/nginx/sbin/* /usr/local/sbin/ //創(chuàng)建軟鏈接
[root@85099880dabe nginx-1.16.0]# nginx
[root@85099880dabe nginx-1.16.0]# nginx //確認(rèn)nginx服務(wù)開啟
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、遷移鏡像

所需環(huán)境：

docker1主機(jī)：192.168.45.129

docker2主機(jī)：192.168.45.134

1）docker1主機(jī)

將docker1的剛剛創(chuàng)建的容器并制作成鏡像導(dǎo)入docker2主機(jī)上

[root@Docker ~]# docker commit webapp myweb //將webapp容器制作成鏡像名為myweb
sha256:b035b8e8a36140e1bdbda9cf3a736b139ea8a48db7871a10f509b8f34d4c0f82
[root@Docker ~]# docker save > myweb.tar myweb:latest //將鏡像導(dǎo)出
[root@Docker ~]# scp myweb.tar 192.168.45.134:/root //將鏡像導(dǎo)出的tar包cp給docker2主機(jī)
The authenticity of host '192.168.45.134 (192.168.45.134)' can't 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@192.168.45.134's password: //密碼為docker2主機(jī)的密碼
myweb.tar 100% 353MB 176.4MB/s 00:02

2）docker2主機(jī)

[root@Docker2 ~]# docker load < myweb.tar //將剛剛cp過來的tar包制作成鏡像
[root@Docker2 ~]# docker run -itd --name newweb myweb:latest //啟動一個容器
[root@Docker2 ~]# docker exec -it newweb /bin/bash //進(jìn)入容器
[root@4e419b580248 /]# nginx
[root@4e419b580248 /]# nginx //確定已啟動nginx服務(wù)
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：這里我們可以看見在docker1主機(jī)容器中搭建的簡單nginx環(huán)境并制作成鏡像成功的遷移到了docker2主機(jī)上了

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