[CentOS] Problem with cron
I have a root cron job that powers down my server every day at 1am and 6pm. The output of '# crontab -l' is shown below. * 1,18 * * * poweroff Last night, after the server powered down at 6pm, I decided I wanted to use the server so I started it with the power button. The server, after a minute or so, powered itself down. This behaviour happened repeatedly until I waited past 7pm. Then the server did not poweroff. Apparently a cron job that executed correctly at 6pm was executing minutes past 6pm when the server was restarted. This is totally unexpected behavior. Here is the output of the cron log file. The name of the server has been redacted. # grep -i 'Feb 22' cron-20140223 | grep -i poweroff Feb 22 18:00:01 xx CROND[2875]: (root) CMD (poweroff) Feb 22 18:12:01 xx CROND[1894]: (root) CMD (poweroff) Feb 22 18:16:01 xx CROND[1893]: (root) CMD (poweroff) Feb 22 18:18:01 xx CROND[1896]: (root) CMD (poweroff) Feb 22 18:22:01 xx CROND[1915]: (root) CMD (poweroff) Feb 22 18:25:01 xx CROND[1919]: (root) CMD (poweroff) Feb 22 18:34:01 xx CROND[1890]: (root) CMD (poweroff) Is there a fix for this behavior? Thank you, Joe ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with cron
On Sun, Feb 23, 2014 at 08:20:06AM -0600, Joseph Hesse wrote: > I have a root cron job that powers down my server every day at 1am and > 6pm. The output of '# crontab -l' is shown below. > > * 1,18 * * * poweroff Nope. That says "every minute of hours 1 and 18". So 0100, 0101, 0102, 0103 etc etc You want it to read "0 1,18 * * * poweroff" > Apparently a cron job that executed correctly at 6pm was executing > minutes past 6pm when the server was restarted. This is totally > unexpected behavior. Totally expected. > Is there a fix for this behavior? Yes, user error; fix the cron job. -- rgds Stephen ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Growing HW RAID arrays, Online
On 22.02.2014 22:27, James A. Peltier wrote: > > partprobe can rescan partitions, but it can't resize them. You may > be able to use gparted or the parted text mode to resize partitions > online. Sadly you can't really do this without reboot. I'd love to be wrong, but I hit the same problem in the past and I simply found no way of doing it. Even with centos cloud instances, this operation (resize partition) has to be done from initramfs before the filesystems go "live". Lucian -- Sent from the Delta quadrant using Borg technology! Nux! www.nux.ro ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with cron
Thank you. Sorry, I have egg on my face. On 02/23/2014 08:22 AM, Stephen Harris wrote: > On Sun, Feb 23, 2014 at 08:20:06AM -0600, Joseph Hesse wrote: >> I have a root cron job that powers down my server every day at 1am and >> 6pm. The output of '# crontab -l' is shown below. >> >> * 1,18 * * * poweroff > Nope. That says "every minute of hours 1 and 18". So 0100, 0101, 0102, 0103 > etc etc > > You want it to read "0 1,18 * * * poweroff" > >> Apparently a cron job that executed correctly at 6pm was executing >> minutes past 6pm when the server was restarted. This is totally >> unexpected behavior. > Totally expected. > >> Is there a fix for this behavior? > Yes, user error; fix the cron job. > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Growing HW RAID arrays, Online
On Sun, Feb 23, 2014 at 8:33 AM, Nux! wrote: > On 22.02.2014 22:27, James A. Peltier wrote: >> >> partprobe can rescan partitions, but it can't resize them. You may >> be able to use gparted or the parted text mode to resize partitions >> online. > > Sadly you can't really do this without reboot. I'd love to be wrong, > but I hit the same problem in the past and I simply found no way of > doing it. > Even with centos cloud instances, this operation (resize partition) has > to be done from initramfs before the filesystems go "live". So my question is 'why can't partitions be grown live like disks can?' I'm tempted to call this a bug. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Growing HW RAID arrays, Online
- Original Message - | On Sun, Feb 23, 2014 at 8:33 AM, Nux! wrote: | > On 22.02.2014 22:27, James A. Peltier wrote: | >> | >> partprobe can rescan partitions, but it can't resize them. You | >> may | >> be able to use gparted or the parted text mode to resize | >> partitions | >> online. | > | > Sadly you can't really do this without reboot. I'd love to be | > wrong, | > but I hit the same problem in the past and I simply found no way of | > doing it. | > Even with centos cloud instances, this operation (resize partition) | > has | > to be done from initramfs before the filesystems go "live". | | So my question is 'why can't partitions be grown live like disks | can?' | I'm tempted to call this a bug. Try blockdev --rereadpt /dev/sdX of course substituting /dev/sdX for the correct device. -- James A. Peltier Manager, IT Services - Research Computing Group Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpelt...@sfu.ca Website : http://www.sfu.ca/itservices "Around here, however, we don’t look backwards for very long. We KEEP MOVING FORWARD, opening up new doors and doing things because we’re curious and curiosity keeps leading us down new paths." - Walt Disney ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
