Docker builds nginx reverse proxy Nacos cluster plus mysql

If you need to modify the ip to your own ip port -p, modify the accessible ip on the left side, modify the port in the container by default 8848 on the right

docker run -d \
-e MODE=cluster \
-e NACOS_APPLICATION_PORT=8848 \
-e NACOS_SERVERS=ip:38848,ip:38849,ip:38850 \
-e SPRING_DATASOURCE_PLATFORM=mysql \
-e MYSQL_SERVICE_HOST=ip \
-e MYSQL_SERVICE_PORT=33306 \
-e MYSQL_SERVICE_USER=root \
-e MYSQL_SERVICE_PASSWORD=980224 \
-e MYSQL_SERVICE_DB_NAME=nacos_config \
-e NACOS_SERVER_IP=ip \
-e JVM_XMS=215m -e JVM_XMX=215m -e JVM_XMN=215m \
-p 38848:8848 \
--name nacos48 \
--restart=always \
nacos/nacos-server:1.3.1
 
docker run -d \
-e MODE=cluster \
-e NACOS_APPLICATION_PORT=8848 \
-e NACOS_SERVERS=ip:38848,ip:38849,ip:38850 \
-e SPRING_DATASOURCE_PLATFORM=mysql \
-e MYSQL_SERVICE_HOST=ip \
-e MYSQL_SERVICE_PORT=33306 \
-e MYSQL_SERVICE_USER=root \
-e MYSQL_SERVICE_PASSWORD=980224 \
-e MYSQL_SERVICE_DB_NAME=nacos_config \
-e NACOS_SERVER_IP=ip \
-e JVM_XMS=215m -e JVM_XMX=215m -e JVM_XMN=215m \
-p 38849:8848 \
--name nacos49 \
--restart=always \
nacos/nacos-server:1.3.1

docker run -d \
-e MODE=cluster \
-e NACOS_APPLICATION_PORT=8848 \
-e NACOS_SERVERS=ip:38848,ip:38849,ip:38850 \
-e SPRING_DATASOURCE_PLATFORM=mysql \
-e MYSQL_SERVICE_HOST=ip \
-e MYSQL_SERVICE_PORT=33306 \
-e MYSQL_SERVICE_USER=root \
-e MYSQL_SERVICE_PASSWORD=980224 \
-e MYSQL_SERVICE_DB_NAME=nacos_config \
-e NACOS_SERVER_IP=ip \
-e JVM_XMS=215m -e JVM_XMX=215m -e JVM_XMN=215m \
-p 38850:8848 \
--name nacos50 \
--restart=always \
nacos/nacos-server:1.3.1

2.3 Command parameter description

MODE=cluster cluster mode

NACOS_APPLICATION_PORT=8848 container nacos port

NACOS_SERVERS=ip:38848,ip:38849,ip:38850 each nacos-server service in the cluster

SPRING_DATASOURCE_PLATFORM=mysql supports mysql independently

NACOS_SERVER_IP=ip optional value hostname/ip default ip

MYSQL_* related

MYSQL_SERVICE_DB_NAME=nacos_config database initialization script database name

Database initialization script: https://github.com/alibaba/nacos/blob/develop/distribution/conf/nacos-mysql.sql

JVM_XMS=215m -e JVM_XMX=215m -e JVM_XMN=215m

-p 38850: 8848 38850 host port: 8848 nacos access port

--restart=always restarting the docker service will start the container

nacos/nacos-server: 1.3.1 nacos mirror version

Copy all directly into xshell as follows

2.4 Open firewall ports

firewall-cmd --zone=public --add-port=38848/tcp --permanent
firewall-cmd --zone=public --add-port=38849/tcp --permanent
firewall-cmd --zone=public --add-port=38850/tcp --permanent
firewall-cmd --zone=public --add-port=33306/tcp --permanent
firewall-cmd --reload

If it is an Alibaba Cloud server, open the security group rules

2.5 After successful startup, we can access the nacos console

Access address 1: http://host IP:38848/nacos 
access address 2: http://host IP:38849/nacos 
access address 3: http://host IP:38850/nacos 
default login account and password If nacos is shown in the 
figure, the cluster is successfully built

3.docker install nginx

3.1. Create command

-v docker mounts to the host location, you need to create it yourself and put your location on the right of -v: left

docker run -id --name=nginx_master -p 80:80 -v  /home/dockerdata/nginx/nginx_master/conf/nginx.conf:/etc/nginx/nginx.conf \
-v /home/dockerdata/nginx/nginx_master/logs:/var/log/nginx \
-v /home/dockerdata/nginx/nginx_master/html:/usr/share/nginx/html --restart=always nginx:1.19.0

supplement

2.1.1 docker container settings automatic start

Add --restart=always when creating the startup container

Flag Descriptionno does not automatically restart the container. (default value) on-failure the container exits due to an error (the container exit status is not 0) restart the container unless-stopped restart the container only when the container has been stopped or Docker stopped/restarted always in the container Restart the container when it has been stopped or Docker is stopped/restarted

If you have created a started container, use update to update: docker update --restart=always nginx_master

3.2.nginx configuration content

Modify the configuration file ip to your own ip

nginx.conf location: /home/dockerdata/nginx/nginx_master/conf/nginx.conf where the startup command is mounted

user  nginx;
worker_processes  1;

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


events {
    worker_connections  1024;
}


http {
    upstream nacos-cluster {
    server ip:38848;
    server ip:38849;
    server ip:38850;
    }

    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;

    server {
        listen       80;
        listen  [::]:80;
        server_name  ip;
    
        #charset koi8-r;
        #access_log  /var/log/nginx/host.access.log  main;
    
        location /nacos {
            proxy_pass   http://nacos-cluster;
        }
    
        #error_page  404              /404.html;
    
        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    
        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}
    
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}
    
        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }
}

3.3 nginx supports five distribution modes

#设定负载均衡的服务器列表
    upstream 变量名 {
        #weigth参数表示权值，权值越高被分配到的几率越大
        #max_fails 当有#max_fails个请求失败，就表示后端的服务器不可用，默认为1，将其设置为0可以关闭检查
        #fail_timeout 在以后的#fail_timeout时间内nginx不会再把请求发往已检查出标记为不可用的服务器
    }
！！！分配方式
    Nginx的upstream支持5种分配方式，下面将会详细介绍，其中，前三种为Nginx原生支持的分配方式，后两种为第三方支持的分配方式：
1、轮询        
        轮询是upstream的默认分配方式，即每个请求按照时间顺序轮流分配到不同的后端服务器，如果某个后端服务器down掉后，能自动剔除。
        upstream backend {
            server 192.168.200.131:8848;
            server 192.168.200.131:8849;
            server 192.168.200.131:8850;
        }
2、weight        
        轮询的加强版，即可以指定轮询比率，weight和访问几率成正比，主要应用于后端服务器异质的场景下。
        upstream backend {
            server 192.168.200.131:8848 weight=1;
            server 192.168.200.131:8849 weight=2;
            server 192.168.200.131:8850 weight=3;
        }
3、ip_hash        
        每个请求按照访问ip（即Nginx的前置服务器或者客户端IP）的hash结果分配，这样每个访客会固定访问一个后端服务器，可以解决session一致问题。
        upstream backend {
            ip_hash;
            server 192.168.200.131:8848;
            server 192.168.200.131:8849;
            server 192.168.200.131:8850;
        }
4、fair        
        fair顾名思义，公平地按照后端服务器的响应时间（rt）来分配请求，响应时间短即rt小的后端服务器优先分配请求。
        upstream backend {
            server 192.168.200.131:8848;
            server 192.168.200.131:8849;
            server 192.168.200.131:8850;
            fair;
        }
5、url_hash
        与ip_hash类似，但是按照访问url的hash结果来分配请求，使得每个url定向到同一个后端服务器，主要应用于后端服务器为缓存时的场景下。
        upstream backend {
            server 192.168.200.131:8848;
            server 192.168.200.131:8849;
            server 192.168.200.131:8850;
            hash $request_uri;
            hash_method crc32;
        }
        其中，hash_method为使用的hash算法，需要注意的是：此时，server语句中不能加weight等参数。

3.4 restart nginx

docker restart nginx_master

3.5 Visit

http://nginxIP/nacos