基于Docker部署Tomcat集群、 Nginx负载均衡的问题小结
目录
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 $D;mkdir uag_nginx uag_tomcat8; ls uag_nginx uag_tomcat8
一，Ngixn 镜像制作
cd uag_nginx/ # 用于存放配置文件 mkdir nginx vim Dockerfile
Dockerfile 文件内容
FROM nginx LABEL maintainer="uag" ENV REFRESHED_AT 2021-08-27 EXPOSE 8099
构建nginx配置文件内容
这个的配置文件，在容器运行的时候通过 -v参数与 容器内部共享。方便后期参数更改
cd ./nginx vim nginx.conf
nginx.conf 配置文件内容
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log notice;
pid /var/run/nginx.pid;
daemon off;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$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
ls Dockerfile UAWeb.war
构建镜像
docker build -t uag/uag_tomcat .
三，运行容器 Nginx镜像
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/
┌──(liruilong㉿Liruilong)-[/mnt/e/docker/uag/uag_nginx] └─$ docker push liruilong/nginx_log The push refers to repository [docker.io/liruilong/nginx_log] An image does not exist locally with the tag: liruilong/nginx_log ┌──(liruilong㉿Liruilong)-[/mnt/e/docker/uag/uag_nginx] └─$ docker tag 9c9af0362eb9 liruilong/nginx_log ┌──(liruilong㉿Liruilong)-[/mnt/e/docker/uag/uag_nginx] └─$ docker push liruilong/nginx_log The push refers to repository [docker.io/liruilong/nginx_log] fb04ab8effa8: Pushed 8f736d52032f: Pushed 009f1d338b57: Pushed 678bbd796838: Pushed d1279c519351: Pushed f68ef921efae: Pushed latest: digest: sha256:2af7e8aeab84e8a816caf6b0342e1a45f95c7089ff52578040ea3a4c28a943c7 size: 1570 ┌──(liruilong㉿Liruilong)-[/mnt/e/docker/uag/uag_nginx] └─$ docker push liruilong/nginx_log:tagname # 拉去镜像
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