docker部署Nacos集群

一、拉取nacos镜像

docker pull nacos/nacos-server #拉取nacos镜像
#创建挂载文件路径
mkdir -p /usr/local/nacos/logs1 /usr/local/nacos/logs2 /usr/local/nacos/logs3
mkdir -p /usr/etc/nacos/conf
docker cp 18fa206c4883:/home/nacos/conf /usr/etc/nacos/conf #复制nacos配置目录到宿主机（或从其他地方复制需要application.properties、cluster.conf）
#创建自定义网络
docker network create --driver bridge --subnet 172.18.0.0/16 self_network
#启动mysql容器
docker create -p 3306:3306  --network self_network --network-alias mysql --name mysql8.0 -e MYSQL_ROOT_PASSWORD=123456 -v /usr/etc/mysql8.0/mysql/conf:/etc/mysql -v /usr/etc/mysql8.0/mysql/logs:/var/log/mysql -v /usr/etc/mysql8.0/mysql/data:/var/lib/mysql -v /usr/etc/mysql8.0/mysql/mysql-files:/var/lib/mysql-files  mysql
#创建三个nacos容器
docker run -d \
--network self_network --network-alias nacos-server-1 --ip 172.18.0.03 --name nacos-server-1 \
-e PREFER_HOST_MODE=hostname \
-e MODE=cluster \
-e NACOS_SERVER_PORT=8848 \
-e NACOS_SERVERS="106.14.146.229:18846 106.14.146.229:18847 106.14.146.229:18848" \
-e NACOS_SERVER_IP=106.14.146.229 \
-e JVM_XMS=256m -e JVM_XMX=512m  \
-v /usr/local/nacos/logs1:/home/nacos/logs \
-v /usr/etc/nacos/conf:/home/nacos/conf \
-p 18846:8848 \
nacos/nacos-server

docker run -d \
--network self_network --network-alias nacos-server-2 --ip 172.18.0.04  --name nacos-server-2 \
-e PREFER_HOST_MODE=hostname \
-e MODE=cluster \
-e NACOS_SERVER_PORT=8848 \
-e NACOS_SERVERS="106.xx.1x6.229:18846 106.xx.1x6.229:18847 106.xx.1x6.229:18848" \
-e NACOS_SERVER_IP=106.xx.1x6.229 \
-e JVM_XMS=256m -e JVM_XMX=512m  \
-v /usr/local/nacos/logs1:/home/nacos/logs \
-v /usr/etc/nacos/conf:/home/nacos/conf \
-p 18847:8848 \
nacos/nacos-server

docker run -d \
--network self_network --network-alias nacos-server-3 --ip 172.18.0.05  --name nacos-server-3 \
-e PREFER_HOST_MODE=hostname \
-e MODE=cluster \
-e NACOS_SERVER_PORT=8848 \
-e NACOS_SERVERS="106.xx.1x6.229:18846 106.xx.1x6.229:18847 106.xx.1x6.229:18848" \
-e NACOS_SERVER_IP=106.xx.1x6.229 \
-e JVM_XMS=256m -e JVM_XMX=512m  \
-v /usr/local/nacos/logs1:/home/nacos/logs \
-v /usr/etc/nacos/conf:/home/nacos/conf \
-p 18848:8848 \
nacos/nacos-server

开放端口后尝试请求登录界面

查看日志，

发现nacos启动报错，原因是启动容器的时候没配置mysql地址,根据自己情况配置

配置后发现Caused by: java.net.SocketTimeoutException: connect timed out，但是我该配置文件在本地是可以使用的。推测容器可能连不上宿主机，尝试ping宿主机ip后ping不通，ping 8.8.8.8也ping不通.



解决方式：
多番尝试后将数据连接地址改成172.18.0.2(mysql容器IP，原本使用阿里云外网地址)即可正常启动（mysql也是使用docker安装，--net=Bridge模式）,这是容器间的通讯问题，暂时不了解。
Caused by: com.mysql.cj.exceptions.CJException: Public Key Retrieval is not allowed在url后拼接allowPublicKeyRetrieval=true

docker network inspect self_network #获取网络的元数据。db_url 中ip地址如下

更改Nginx配置

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       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  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
    #三个nacos容器端口
    upstream nacos{
        server 127.0.0.1:18846;
        server 127.0.0.1:18847;
        server 127.0.0.1:18848;
    }

    server {
        listen       8848;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            #root   html;
            #index  index.html index.htm;
            #添加代理
            proxy_pass http://nacos;
        }

        #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   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;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

在cluster.conf 配置三个容器的地址；

127.0.0.1:18846
127.0.0.1:18847
127.0.0.1:18848

校验一下是否配置成功

问题：mysql容器的ip可能会变,需要时可以指定固定ip;