日志有两种

  • 访问日志
  • 运行日志

访问日志

日志配置（注释即可关闭）：

  1. <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
  2.                prefix="localhost_access_log." suffix=".txt"
  3.                pattern="%h %l %u %t &quot;%r&quot; %s %b" />

实例：

  1. -rwxrwxr-x 1 worker worker   84813 Jan  9 13:39 localhost_access_log.2020-01-09.txt

内容：

  1. 10.200.9.86 - - [09/Jan/2020:13:38:56 +0800] "POST /provider/48/provider-detail.htm HTTP/1.1" 200 591
  2. 10.200.9.86 - - [09/Jan/2020:13:39:02 +0800] "GET /index.htm HTTP/1.1" 200 6311
  3. 10.200.9.86 - - [09/Jan/2020:13:39:02 +0800] "POST /provider/48/provider-detail.htm HTTP/1.1" 200 591
  4. 10.200.9.86 - - [09/Jan/2020:13:39:07 +0800] "GET /index.htm HTTP/1.1" 200 6311
  5. 10.200.9.86 - - [09/Jan/2020:13:39:07 +0800] "POST /provider/48/provider-detail.htm HTTP/1.1" 500 3887
  6. 10.200.9.86 - - [09/Jan/2020:13:39:10 +0800] "POST /app/list.htm HTTP/1.1" 200 1498
  7. 10.200.9.86 - - [09/Jan/2020:13:39:15 +0800] "POST /app/xxx-consumer/nodes.htm HTTP/1.1" 200 12
  8. 10.200.9.86 - - [09/Jan/2020:13:39:18 +0800] "POST /app/list.htm HTTP/1.1" 200 1442
  9. 10.200.9.86 - - [09/Jan/2020:13:39:20 +0800] "POST /dubbo-ui/loadAppsType.htm HTTP/1.1" 404 1042
  10. 10.200.9.86 - - [09/Jan/2020:13:39:20 +0800] "POST /dubbo-ui/loadServiceProtocols.htm HTTP/1.1" 404 1042

运行日志

  • 运行日志分为5类：catalina 、localhost 、manager 、admin 、host-manager


  • 日志的级别分为7种：SEVERE (highest value) > WARNING > INFO > CONFIG > FINE > FINER > FINEST (lowest value)，除此之外，还可以使用OFF关闭相关日志，使用ALL输出所有级别的日志


  • 修改 TOMCAT_HOME/conf/logging.properties 中的内容，设定某类日志的级别
  1. # 设置 catalina 日志的级别为： FINE
  2. catalina.org.apache.juli.FileHandler.level = FINE
  4. # 禁用 catalina 日志的输出：
  5. catalina.org.apache.juli.FileHandler.level = OFF
  7. # 输出 catalina 所有的日志消息：
  8. catalina.org.apache.juli.FileHandler.level = ALL

实际配置文件：

  1. 1catalina.org.apache.juli.AsyncFileHandler.level = FINE
  2. 1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
  3. 1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina.
  4. 1catalina.org.apache.juli.AsyncFileHandler.maxDays = 90  # 保留90天，可以修改
  5. 1catalina.org.apache.juli.AsyncFileHandler.encoding = UTF-8
  7. 2localhost.org.apache.juli.AsyncFileHandler.level = FINE
  8. 2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
  9. 2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost.
  10. 2localhost.org.apache.juli.AsyncFileHandler.maxDays = 90
  11. 2localhost.org.apache.juli.AsyncFileHandler.encoding = UTF-8

catalina日志太大的问题

方式1：直接关闭日志

image.png

方式二：使用logrotate

CentOS6.5后自带logrotate程序，可以解决catalina.out的日志轮转问题

  1. cat >/etc/logrotate.d/tomcat 
  3. /usr/local/tomcat/logs/catalina.out{            
  4.     copytruncate                                
  5.     daily                                       
  6.     rotate 7                                    
  7.     missingok                                   
  8.     compress                                    
  9.     size 16M                                    
  10. }

解释：

  1. 要轮转的文件
  2. 创建新的catalina.out副本，截断源catalina.out文件
  3. 每天进行catalina.out文件的轮转
  4. 至多保留7个副本
  5. 文件丢失了，轮转不报错
  6. 使用压缩
  7. 当catalina.out文件大于16MB，就轮转