1, 定时任务调用链
crontab任务配置使用: https://blog.csdn.net/eyeofeagle/article/details/83217396
2, 查看帮助：配置文件使用
- It allows automatic rotation, compression, removal, and mailing of log files
- Each log file may be handled daily, weekly, monthly, or when it grows too large.
[root@c72 ~]# cat /etc/logrotate.conf
# see "man logrotate" for details
# rotate log files weekly
weekly
# keep 4 weeks worth of backlogs
rotate 4
# create new (empty) log files after rotating old ones
create
# use date as a suffix of the rotated file
dateext
# uncomment this if you want your log files compressed
#compress
# RPM packages drop log rotation information into this directory
include /etc/logrotate.d
# no packages own wtmp and btmp -- we'll rotate them here
/var/log/wtmp {
monthly
create 0664 root utmp
minsize 1M
rotate 1
}
...
[root@test-c6 ~]# ls /etc/logrotate.d
ConsoleKit dracut httpd kadmind krb5kdc mysql psacct syslog yum
[root@test-c6 ~]# rpm -qf /etc/logrotate.d/mysql
MySQL-server-5.5.62-1.el6.x86_64
[root@test-c6 ~]# rpm -qf /etc/logrotate.d/yum
yum-3.2.29-81.el6.centos.0.1.noarch
[root@test-c6 ~]# rpm -qf /etc/logrotate.d/syslog
rsyslog-5.8.10-12.el6.x86_64
[root@test-c6 ~]# cat /etc/logrotate.d/httpd
/var/log/httpd/*log {
missingok
notifempty
sharedscripts
delaycompress
postrotate
/sbin/service httpd reload > /dev/null 2>/dev/null || true
endscript
}
[root@test-c6 ~]# man logrotate
...
CONFIGURATION FILE
logrotate reads everything about the log files it should be handling from the series of configuration files specified on the command
line. Each configuration file can set global options (local definitions override global ones, and later definitions override earlier
ones) and specify logfiles to rotate. A simple configuration file looks like this:
# sample logrotate configuration file
compress
/var/log/messages {
rotate 5
weekly
postrotate
/usr/bin/killall -HUP syslogd
endscript
}
...
copytruncate
Truncate the original log file in place after creating a copy, instead of moving the old log file and optionally creating a
new one. It can be used when some program cannot be told to close its logfile and thus might continue writing (appending) to
the previous log file forever. Note that there is a very small time slice between copying the file and truncating it, so some
logging data might be lost. When this option is used, the create option will have no effect, as the old log file stays in
place.
notifempty
Do not rotate the log if it is empty
3, 自定义配置：切割/备份指定文件
[root@test-c6 ~]# cat /etc/logrotate.d/1.log
/var/log/1.txt
/var/log/a.txt {
missingok
notifempty
rotate 3
dateext
copytruncate
#size 10M
maxsize 10M
compress
}
#产生26M测试数据
[root@test-c6 ~]# head -c 10M /dev/urandom |od -x |tr -d ' ' > /var/log/1.txt
[root@test-c6 ~]# head -c 10M /dev/urandom |od -x |tr -d ' ' > /var/log/a.txt
[root@test-c6 ~]# ll -h /var/log/*.txt
-rw-r--r-- 1 root root 26M Dec 1 07:41 /var/log/1.txt
-rw-r--r-- 1 root root 26M Dec 1 07:41 /var/log/a.txt
[root@test-c6 ~]# head -1 /var/log/a.txt
0000000b59092c99538fa92c4c2ecadc418ae1a
#修改当前时间，以生成新的备份文件名
[root@test-c6 ~]# date -s "$(date -d '2 days' +"%F %T")"
Thu Dec 3 07:42:09 CST 2020
#手动调用rotate，测试：
[root@test-c6 ~]# logrotate --help
Usage: logrotate [OPTION...] <configfile>
-d, --debug Don't do anything, just test (implies -v)
-f, --force Force file rotation
-m, --mail=command Command to send mail (instead of `/bin/mail')
-s, --state=statefile Path of state file
-v, --verbose Display messages during rotation
...
[root@test-c6 ~]# logrotate -v -f /etc/logrotate.d/1.log
reading config file /etc/logrotate.d/1.log
reading config info for /var/log/1.txt /var/log/a.txt
Handling 1 logs
rotating pattern: /var/log/1.txt /var/log/a.txt forced from command line (3 rotations)
empty log files are rotated, old logs are removed
considering log /var/log/1.txt
log needs rotating
considering log /var/log/a.txt
log needs rotating
rotating log /var/log/1.txt, log->rotateCount is 3
dateext suffix '-20201203'
glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
glob finding old rotated logs failed
copying /var/log/1.txt to /var/log/1.txt-20201203
truncating /var/log/1.txt
compressing log with: /bin/gzip
rotating log /var/log/a.txt, log->rotateCount is 3
dateext suffix '-20201203'
glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
glob finding old rotated logs failed
copying /var/log/a.txt to /var/log/a.txt-20201203
truncating /var/log/a.txt
compressing log with: /bin/gzip
#生成压缩文件
[root@test-c6 ~]# ls /var/log/*.txt* -lh
-rw-r--r-- 1 root root 0 Dec 3 07:51 /var/log/1.txt
-rw-r--r-- 1 root root 14M Dec 3 07:51 /var/log/1.txt-20201203.gz
-rw-r--r-- 1 root root 0 Dec 3 07:51 /var/log/a.txt
-rw-r--r-- 1 root root 14M Dec 3 07:51 /var/log/a.txt-20201203.gz
#解压文件，和原文件对比
[root@test-c6 ~]# gunzip /var/log/a.txt-20201203.gz
[root@test-c6 ~]# ls /var/log/a.txt* -lh
-rw-r--r-- 1 root root 0 Dec 3 07:51 /var/log/a.txt
-rw-r--r-- 1 root root 26M Dec 3 07:51 /var/log/a.txt-20201203
[root@test-c6 ~]# head -1 /var/log/a.txt-20201203
0000000b59092c99538fa92c4c2ecadc418ae1a