基于Docker部署Tomcat集群、 Nginx负载均衡的问题小结

新用户8754rVpJ 2022-02-10

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写在前面

看完Dokcer相关的书籍，正好有个项目要这样搞，所以自己练习一下。

当作一百世一样。这里的道理很明白:我思故我在,既然我存在,就不能装作不存在。无论如何,我要为自己负起责任。——王小波《三十而立》

结构图：

这里仅作为一种学习，一般这种负载的话，Nginx是放到主机侧的， JavaWeb(Tomcat)应用放到容器里。

效果

新建文件夹。

D=uag;mkdir $D;cd $D;mkdir uag_nginx uag_tomcat8;

uag_nginx uag_tomcat8

一，Ngixn 镜像制作

cd uag_nginx/

# 用于存放配置文件

mkdir nginx

vim Dockerfile

Dockerfile 文件内容

FROM nginx

LABEL maintainer="uag"

ENV REFRESHED_AT 2021-08-27

EXPOSE 8099

构建nginx配置文件内容

这个的配置文件，在容器运行的时候通过 -v参数与容器内部共享。方便后期参数更改

1 2	cd ./nginx vim nginx.conf

nginx.conf 配置文件内容

user nginx;

worker_processes auto;

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

pid /var/run/nginx.pid;

daemon off;

events {

worker_connections 1024;

}

http {

include /etc/nginx/mime.types;

default_type application/octet-stream;

log_format main '$upstream_addr - $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;

server {

listen 8099;

server_name localhost;

root /var/www/html/;

index index.html index.htm;

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

error_log /var/log/nginx/default_error.log;

location / {

proxy_pass http://backend;

}

location ~ .* {

proxy_pass http://backend;

proxy_set_header Host $http_host;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

}

# 这里配置负载

upstream backend {

server 172.23.231.190:8069;

server 172.23.231.190:8079;

server 172.23.231.190:8089;

}

配置负载:172.23.231.190为宿主机IP,8069,8079,8089为对应的Java Web 暴露的应用端口。

# 这里配置负载

upstream backend {

server 172.23.231.190:8069;

server 172.23.231.190:8079;

server 172.23.231.190:8089;

}

构建Nginx镜像

docker build -t uag/uag_nginx .

二，java Web(Tomcat)应用镜像构建

cd uag_tomcat8/

vim Dockerfile

Dockerfile 文件内容

FROM dordoka/tomcat

MAINTAINER LIRUILONG

COPY UAWeb.war /opt/tomcat/webapps/UAWeb.war

EXPOSE 8080

ENTRYPOINT [ "/opt/tomcat/bin/catalina.sh", "run" ]

上传对应的War包

1 2	ls Dockerfile UAWeb.war

构建镜像

docker build -t uag/uag_tomcat .

三，运行容器 Nginx镜像

1	docker run -d -p 8099:8099 --name uag_nginx -v $PWD/nginx/nginx.conf:/etc/nginx/nginx.conf uag/uag_nginx nginx

java Web(Tomcat)镜像

docker run -it -d -p 8089:8080 --name uag_app_1 uag/uag_tomcat

docker run -it -d -p 8079:8080 --name uag_app_2 uag/uag_tomcat

docker run -it -d -p 8069:8080 --name uag_app_3 uag/uag_tomcat

查看运行的容器

浏览器访问

查看负载方式:新进程的方式

查看负载方式:–volumes-from 方式

Dockerfile文件

FROM nginx

LABEL maintainer="uag"

ENV REFRESHED_AT 2021-08-27

VOLUME /var/log/nginx/

EXPOSE 80

┌──(liruilong㉿Liruilong)-[/mnt/e/docker/uag/uag_nginx]

└─$ docker run -it --rm --volumes-from nginx_log centos cat /var/log/nginx/default_access.log

172.23.231.190:8069 - 172.17.0.1 - - [30/Aug/2021:12:55:02 +0000] "GET /UAWeb/services/listServices HTTP/1.1" 200 12660 "http://127.0.0.1:8099/UAWeb/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" "-"

172.23.231.190:8079 - 172.17.0.1 - - [30/Aug/2021:12:55:02 +0000] "GET /UAWeb/axis2-web/css/axis-style.css HTTP/1.1" 200 1587 "http://127.0.0.1:8099/UAWeb/services/listServices" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" "-"

172.23.231.190:8069 - 172.17.0.1 - - [30/Aug/2021:12:55:02 +0000] "GET /UAWeb/axis2-web/images/asf-logo.gif HTTP/1.1" 200 5866 "http://127.0.0.1:8099/UAWeb/services/listServices" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" "-"

172.23.231.190:8079 - 172.17.0.1 - - [30/Aug/2021:12:55:02 +0000] "GET /UAWeb/axis2-web/images/axis_l.jpg HTTP/1.1" 200 12340 "http://127.0.0.1:8099/UAWeb/services/listServices" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" "-"

172.23.231.190:8089 - 172.17.0.1 - - [30/Aug/2021:12:55:03 +0000] "GET /UAWeb/services/listServices HTTP/1.1" 200 12660 "http://127.0.0.1:8099/UAWeb/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36" "-"

172.23.231.190:8069 - 172.17.0.1 - - [30/Aug/2021:12:55:03 +0000] "GET /UAWeb/axis2-web/images/asf-logo.gif HTTP/1.1" 200 5866 "http://127.0.0.1:8099/UAWeb/services/listServices" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92

构建好镜像上传仓库：

嗯，需要注册一个Docker Hub账号，然后登录，需要镜像前面加账户名/