How to install Nginx and modify Nginx configuration file with Docker

1. Docker installation of Nginx

1. First, make sure you have started docker on the virtual machine.

2. Secondly, log in to the DockerHub official website, then search for nginx, and then enter docker pull nginx in the virtual machine to download the nginx image. .

3. After downloading, please use the docker images command to check whether the download is successful!

4. Start nginx, enter the following statement, and press Enter. Here I will briefly talk about each parameter.

(1)–name: Determine the name of the container.

(2)-d specifies that the container is running in the background.

(3)-p Container exposed port number.

(4) nginx specifies the image. Because what we download here is the latest version of nginx, we don’t need to add the version number. However, if the download is not the latest version, you need to add the version number. For example, nginx: 1.2.45, that’s about it!

docker run \
--name ng \
-d \
-p 80:80 \
nginx

5. At this time, you can use docker -ps -a to check whether your container is running!

2. Modify the docker configuration file:

1. Modify the docker configuration file here. The core is to use -v Parameters to bind the data volume to.

2. But how do you know what the nginx configuration file looks like? How do you know where the nginx configuration file is? Here you need to visit the official website of dockerHub to find the answer. ! We found through checking the official website that the path of nginx's html file is in /usr/share/nginx/html, and the nginx configuration file is mainly in /etc/nginx/nginx.conf!

3. Therefore, here we can use the cp command in docker to copy it out, and then Binding data volumes is in progress! !

(1) First create the corresponding folder:

mkdir -p \
/tmp/nginx/html \
/tmp/nginx/conf

(2) Secondly, copy the configuration file and folder to the specified directory of the host. Note that you must ensure that your The nginx container is already running! !

docker cp ng:/etc/nginx/nginx.conf /tmp/nginx/conf/

(3) Then you can check /tmp/nginx/conf, as shown in the figure below:

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;
    #
    include /etc/nginx/conf.d/*.conf;
     
}  
}

(4) Delete the previous nginx container and enter docker rm -f ng,That’s it!

(5) Re-create an nginx container and enter the following code block:

docker run \
--name ng \
-d \
-v /tmp/nginx/html:/usr/share/nginx/html \
-v /tmp/nginx/conf/nginx.conf:/etc/nginx/nginx.conf \
-p 80:80 \
nginx

(6) After starting, we can modify the configuration file!

3. Redefine the nginx configuration file:

1. What should I do if I want to redefine a server?

Reason: Be sure to comment out the include /etc/nginx/conf.d/.conf line first because /etc/nginx/ There is a default.conf default configuration in conf.d/.conf. If you do not comment it, the default configuration will still be used first!

2. How to solve the cross-domain problem? There are two methods:

(1) The first method: continue writing in the redefined server.

  server {
	listen 80;
	server_name testVite;
	location / {
	root   /usr/share/nginx/index12;
	index  index.html index.htm;
	}
	 location /api/ {
		proxy_pass http://192.168.37.1:8086/;
	}
}

(2) The second method is not to redefine the server, but to write it in the default.conf file of nginx. Then this method requires going through the above process of this blog again. First, The default file is copied using the cp command, and then the nginx container is re-created, mounted using the -v parameter, and then configured across domains!

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