淺析怎樣利用systemd 實現 tomcat 多實例

環境: CentOS 7 x86_64

1、安裝jdk

1	rpm -ivh jdk-8u60-linux-x64.rpm

2、創建普通用戶

1 2	getent group tomcat || groupadd -r tomcat getent passwd tomcat || useradd -r -d /opt -s /bin/nologin tomcat

3、下載tomcat 7

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cd /opt wget http://mirrors.ustc.edu.cn/apache/tomcat/tomcat-7/v7.0.64/bin/apache-tomcat-7.0.64.tar.gz tar zxvf apache-tomcat-7.0.64.tar.gz mv apache-tomcat-7.0.64 tomcat01 chown -R tomcat:tomcat tomcat01   tar zxvf apache-tomcat-7.0.64.tar.gz mv apache-tomcat-7.0.64 tomcat02 chown -R tomcat:tomcat tomcat02

兩個實例同時監聽8080端口必然會產生衝突，所以必須修改.

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sed -i 's/8080/8081/g' /opt/tomcat01/conf/server.xml sed -i 's/8005/8001/g' /opt/tomcat01/conf/server.xml sed -i 's/8080/8082/g' /opt/tomcat02/conf/server.xml sed -i 's/8005/8002/g' /opt/tomcat02/conf/server.xml

AJP通常用不上，這裏統一關閉

1 2	sed -i '/8009/d' /opt/tomcat01/conf/server.xml sed -i '/8009/d' /opt/tomcat01/conf/server.xml

tomcat在Linux 下默認工作模式是bio,性能非常低,建議使用apr或者nio，

這裏改爲nio,即非阻塞IO,性能比較好。

1 2	sed -i.bak 's#HTTP/1.1#org.apache.coyote.http11.Http11NioProtocol#' /opt/tomcat01/conf/server.xml sed -i.bak 's#HTTP/1.1#org.apache.coyote.http11.Http11NioProtocol#' /opt/tomcat02/conf/server.xml

3、創建啓動文件

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cd /usr/lib/systemd/system cat >tomcat01.service <<EOF [Unit] Description=Apache Tomcat 7 After=network.target [Service] Type=oneshot ExecStart=/opt/tomcat01/bin/startup.sh ExecStop=/opt/tomcat01/bin/shutdown.sh RemainAfterExit=yes User=tomcat Group=tomcat [Install] WantedBy=multi-user.target EOF

tomcat02同理

1	sed 's/tomcat01/tomcat02/g' tomcat01.service > tomcat02.service

4、啓動服務//維修平臺

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systemctl enable tomcat01 systemctl enable tomcat02 systemctl start tomcat01 systemctl start tomcat02

5、查看進程

1	ps aux |grep tomcat

附上一份nginx反向代理tomcat的配置文件

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proxy_cache_path /var/cache/nginx/proxy_cache levels=1:2 keys_zone=static:10m inactive=1h max_size=1g;   upstream tomcat {         ip_hash ;         #hash           $remote_addr consistent;         server          127.0.0.1:8081 max_fails=1 fail_timeout=2s ;         server          127.0.0.1:8082 max_fails=1 fail_timeout=2s ; ;         keepalive       16; }   server {         listen          80;         server_name     tomcat.example.com;           charset         utf-8;         access_log      /var/log/nginx/tomcat.access.log  main;         root            /usr/share/nginx/html;         index           index.html index.htm index.jsp;           location / {                 proxy_pass              http://tomcat;                 proxy_redirect          off;                 proxy_set_header        Host $host;                 proxy_set_header        X-Real-IP $remote_addr;                 proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;                 proxy_cache_use_stale   error timeout invalid_header updating http_500 http_502 http_503 http_504;                   proxy_connect_timeout   300;                 proxy_send_timeout      300;                 proxy_read_timeout      300;                 proxy_http_version      1.1;                 proxy_set_header        Connection "";                   add_header              X-Backend "$upstream_addr";         }           location ~* ^.+\.(js|css|ico|gif|jpg|jpeg|png)$ {                 proxy_pass              http://tomcat ;                 proxy_redirect          off;                 proxy_set_header        Host $host;                 proxy_set_header        X-Real-IP $remote_addr;                 proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;                 proxy_cache_use_stale   error timeout invalid_header updating http_500 http_502 http_503 http_504;                   proxy_connect_timeout   300;                 proxy_send_timeout      300;                 proxy_read_timeout      300;                 proxy_http_version      1.1;                 proxy_set_header        Connection "";                   proxy_cache             static;                 proxy_cache_key         $host$uri$is_args$args;                 proxy_cache_valid       200 302 5m;                 proxy_cache_valid       404 1m;                 proxy_cache_valid       any 1h;                 add_header              X-Cache $upstream_cache_status;                   #log_not_found off;                 #access_log off;                 expires max;         }           location ~ /\.ht {                 deny  all;         }   }

請務必保留此出處http://purplegrape.blog.51cto.com/1330104/1702292