Docker下搭建Tomcat+nginx+MySQL并实现均衡负载
简介
利用云服务器及容器技术的优势，将多个服务器运行内容搭建在一个服务器上，并通过目录挂载将容器更改的内容保留至本地，防止容器关闭后数据丢失获取安装Tomcat、Nginx、MySQL
1、分别获取安装默认版本的tomcat nginx mysql
# 由于国内***较慢，请耐心等待
docker pull tomcat
docker pull nginx
docker pull mysql2、配置tomcat
# 创建用来挂载的本地目录 mkdir -p /localdo/tomcat/webapps/tomcat1 mkdir -p /localdo/tomcat/webapps/tomcat2 # 将制作好的2个不同内容War包放到上面2个目录，测试用，此处不演示 # 创建一个Tomcat容器，命名为my_tomcat1；将容器的8080端口映射到宿主机的8001 # 将宿主机的/localdo/tomcat/webapps/tomcat1 目录挂载到容器上的/usr/local/tomcat/webapps 目录 docker run --name=my_tomcat1 -v /localdo/tomcat/webapps/tomcat1:/usr/local/tomcat/webapps -p 8001:8080 -d tomcat # 在创建一个容器，挂载目录tomcat2，用来均衡负载 docker run --name=my_tomcat1 -v /localdo/tomcat/webapps/tomcat2:/usr/local/tomcat/webapps -p 8001:8080 -d tomcaty
2.1验证Tomcat容器
#仅供参考
[root@centos7-4-hg /]# curl http://localhost:8001/MyServlet/index.html
<html>
<head>
<title>my first servlet</title>
</head>
<body>
hello,servlet! by1
</body>
</html>
[root@centos7-4-hg /]# curl http://localhost:8002/MyServlet/index.html
<html>
<head>
<title>my first servlet</title>
</head>
<body>
hello,servlet! by2
</body>
3.配置Nginx容器
#创建挂载目录，编辑文件
mkdir -p /localdo/nginx
mkdir -p /localdo/nginx/conf.d
touch /localdo/nginx/nginx.conf
touch /localdo/nginx/conf.d/default.conf
#用vi编辑配置文件nginx.conf
user root;
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;
upstream tomcatServer {
server t1:8080;
server t2:8080;
}
}
#编辑配置文件default.conf
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://tomcatServer;
}
}
#启动并配置nginx容器
#容器命名为my_nginx1
#给my_tomcat1、my_tomcat2容器分别起别名，t1、t2
#挂载/localdo/nginx/nginx.conf文件和/localdo/nginx/conf.d目录
#将容器的端口号80映射到宿主机的8000端口
docker run --name=my_nginx1 --link=my_tomcat1:t1 --link=my_tomcat2:t2 -v /localdo/nginx/nginx.conf:/etc/nginx/nginx.conf -v /locado/nginx/conf.d:/etc/nginx/conf.d -p 8000:80 -d nginx
3.1运行效果
[root@centos7-4-hg /]# curl http://localhost:8000/MyServlet/index.html
<html>
<head>
<title>my first servlet</title>
</head>
<body>
hello,servlet! by1
</body>
</html>[root@centos7-4-hg /]# curl http://localhost:8000/MyServlet/index.html
<html>
<head>
<title>my first servlet</title>
</head>
<body>
hello,servlet! by2
</body>
#可见Nginx实现了均衡负载4、配置MySQL
#创建挂载目录 mkdir -p /localdo/mysql/data /localdo/mysql/logs /localdo/mysql/conf #data目录将映射为mysql容器配置的数据文件存放路径 #logs目录将映射为mysql容器的日志目录 #conf目录里的配置文件将映射为mysql容器的配置文件 #启动MySQL容器 docker run -p 3306:3306 --name my_mysql1 -v /u01/mysql/conf:/etc/mysql/conf.d -v /u01/mysql/logs:/logs -v /u01/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 -d mysql #将容器的 3306 端口映射到主机的 3306 端口。挂载相应目录。始化 root 用户的密码。
4.1进入MySQL
[root@centos7-4-hg /]# docker exec -it my_mysql1 bash root@a61c2f08e6e4:/# mysql -uroot -p123456 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 10 Server version: 8.0.19 MySQL Community Server - GPL Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> #此后再对mysql进行xian
