Analysis of the process of simply deploying nginx in Docker container

1. Deploy nginx service in container

The centos:7 image runs a container and deploys the Nginx service in this container.

[root@Docker ~]# docker pull centos:7 //Download the image
[root@Docker ~]# docker run -itd --name webapp --restart=always centos:7 //Run a container named: webapp
[root@Docker ~]# docker cp nginx-1.16.0.tar.gz webapp:/root //Import the local nginx package into the webapp container
[root@Docker ~]# docker exec -it webapp /bin/bash //Enter the container
[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 //Download related dependency packages
[root@85099880dabe nginx-1.16.0]# useradd -M -s /sbin/nologin nginx //Add an nginx user without login permission
[root@85099880dabe nginx-1.16.0]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx //Compile and install

[root@85099880dabe nginx-1.16.0]# make && make install //Compile and install
[root@85099880dabe nginx-1.16.0]# ln -s /usr/local/nginx/sbin/* /usr/local/sbin/ //Create a soft link
[root@85099880dabe nginx-1.16.0]# nginx
[root@85099880dabe nginx-1.16.0]# nginx //Confirm that nginx service is enabled
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. Migrate the image

Required environment:

docker1 host: 192.168.45.129

docker2 host: 192.168.45.134

1) docker1 host

Import the newly created container of docker1 into the docker2 host

[root@Docker ~]# docker commit webapp myweb //Make the webapp container into a mirror named myweb
sha256:b035b8e8a36140e1bdbda9cf3a736b139ea8a48db7871a10f509b8f34d4c0f82
[root@Docker ~]# docker save > myweb.tar myweb:latest //Export the image
[root@Docker ~]# scp myweb.tar 192.168.45.134:/root //cp the exported tarball to the docker2 host
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.
[email protected]'s password: //The password is the password of the docker2 host
myweb.tar 100% 353MB 176.4MB/s 00:02

2) Docker2 host

[root@Docker2 ~]# docker load < myweb.tar //Make the tar package just cp into a mirror
[root@Docker2 ~]# docker run -itd --name newweb myweb:latest //Start a container
[root@Docker2 ~]# docker exec -it newweb /bin/bash //Enter the container
[root@4e419b580248 /]# nginx
[root@4e419b580248 /]# nginx //Confirm that the nginx service has been started
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

Note: Here we can see that the simple nginx environment built in the docker1 host container was successfully migrated to the docker2 host as a mirror.

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.