docker部署spring boot项目，配置Nginx负载均衡

1.配置项目端口8081，把项目打成jar包fund-api.jar

2.把包复制到/var/apps/fund-api

3.在/var/apps/fund-api下创建文件Dockerfile

FROM java:8

ARG JAVA_OPTS="-Xms256m -Xmx256m"

ADD fund-api.jar fund-api.jar
EXPOSE 8081
#设置时区
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
ENTRYPOINT java $JAVA_OPTS -jar /fund-api.jar

4.用包fund-api.jar和Dockerfile创建3个镜像和3个容器，并运行容器

cd /var/apps/fund-api
docker build -t fund-api-1 .
docker run -d -v /var/apps/fund-api/1/logs/:/logs/ -p 8081:8081  fund-api-1

docker build -t fund-api-2 .
docker run -d -v /var/apps/fund-api/2/logs/:/logs/ -p 8082:8081  fund-api-2

docker build -t fund-api-3 .
docker run -d -v /var/apps/fund-api/3/logs/:/logs/ -p 8083:8081  fund-api-3

5.配置Nginx负载均衡

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
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;
	#应用部署在3个地方
    upstream tomcatserver1 {  
        server 106.55.172.84:8081;
        server 106.55.172.84:8082;
        server 106.55.172.84:8083;
    }
    server {
        listen 80; # 监听80端口
        location / {
            proxy_pass   http://tomcatserver1; # 应用服务器HTTP地址
        }
    }
}

6.运行Nginx容器

sudo docker run -d -p 9000:80 --name nginx-web -v ~/nginx/www:/usr/share/nginx/html -v ~/nginx/conf/nginx.conf:/etc/nginx/nginx.conf -v ~/nginx/logs:/var/log/nginx nginx