Category: Life

domain=rskwliyu
host1=10.31.216.10
host2=10.31.216.20
echo “in $host1”
echo “ssh $host2 ok”
echo “cd /”
echo “tar c etc/libvirt/qemu/$domain.xml data/kvm/$domain.img | nc -l 3389”

echo “in $host2”
echo “cd /”
echo “nc $host1 3389 | tar x”

echo “in $host1”
echo “virsh migrate –live $domain qemu+ssh://$host2/system”

echo “in $host2”
echo “virsh edit $domain”
echo “in guest curl put”

echo “curl http://etcd.hupu.io:4001/v2/keys/hostvars/$host1/domain/$domain?recursive=true -XDELETE”

Why join the navy if you can be a pirate? 如果能当海盗，为什么要去参加海军？ ——steve jobs

86400 sec= 1d

2592000 sec = 30d

1440 min=1d

统计集合 key 的 member 的数量

SCARD hello:step:3000:obj_type0

添加配置文件

cat /etc/logrotate.d/myservice

/data/log/myservice/*.log
{
    rotate 7
    daily
    dateext
    dateformat .%Y%m%d
    compress
    missingok
    notifempty
    sharedscripts
    postrotate
      /usr/bin/killall -HUP rsyslogd >/dev/null 2>&1 || true
    endscript
}

debug 配置文件是否正确，但不会真正动你的 log

logrotate -d /etc/logrotate.d/myservice

真实测试 logrotate 情况

logrotate -f /etc/logrotate.d/myservice

使用 logging 有很多好处:

可以方便添加 timestamp
可以为日志定级
不会和业务的 print 混淆
如果你忘了去掉 logging ，最多也只是有一个 log 文件

如果要打印出来

import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
logging.debug('This is a log message.')

如果要放到文件里

import logging
logging.basicConfig(filename='log_filename.txt', level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
logging.debug('This is a log message.')

报警级别

logger.critical('This is a critical message.')
logger.error('This is an error message.')
logger.warning('This is a warning message.')
logger.info('This is an informative message.')
logger.debug('This is a low-level debug message.')

http://inventwithpython.com/blog/2012/04/06/stop-using-print-for-debugging-a-5-minute-quickstart-guide-to-pythons-logging-module/