Re: [qmailtoaster] QMT on VMWare ESXi
I turn off time-sync in vmware tools and run ntp- in .../VMHOST.vmx tools.syncTime = FALSE It keeps good time, doesn't care much how busy VMHOST is, and does not require all the special configuration. A normal redhat install does an ntp setup. Use your own ntp server or make sure your firewall lets the public ones through. Grant Bashamgr...@rsmas.miami.edu 305-421-4026RSMAS/University of Miami On Wed, Oct 7, 2009 at 12:38 PM, Michael Colvin mcol...@norcalisp.comwrote: Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group ( www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
[qmailtoaster] QMT on VMWare ESXi
Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
On your host, you can switch of the clock frequency modelation (in the bios). This should help. Richard. Michael Colvin wrote: Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
I am using QMT in hyper-v. I had the same issue (and some others). I upgraded to the new beta centos 5.4 kernel and most of my problems disappeared. It is available here http://people.redhat.com/dzickus/el5/164.el5/ There may be a newer kernel by now you will need to check. that one works for me so I left well enough alone. FWIW my server has been in production for over a month now with no issues in hyper v. Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
I'm running QMT on a Vmware Server 2.0 on W2k3. It seems i don't have any time issue. Il giorno 07/ott/2009, alle ore 18.51, Sean Humphries ha scritto: I am using QMT in hyper-v. I had the same issue (and some others). I upgraded to the new beta centos 5.4 kernel and most of my problems disappeared. It is available here http://people.redhat.com/dzickus/el5/164.el5/ There may be a newer kernel by now you will need to check. that one works for me so I left well enough alone. FWIW my server has been in production for over a month now with no issues in hyper v. Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
RE: [qmailtoaster] QMT on VMWare ESXi
Check whether the BIOS is using a speed-step or CPU power saving feature. If it is, disable it. This is one cause of time drift in VMWare. I have had problems, though, with CENTOS-based virtuals (in both VMWare Server (mostly) and in VMWare ESXi Server) where the time drifts (by as much as 45% per second!). You can manually set the CPU clock speed that CentOS uses. I forget which config file it is Patrick M. Ring P. Ring Technologies Louisiana Web Host, LLC. 985-868-4200 -Original Message- From: Michael Colvin [mailto:mcol...@norcalisp.com] Sent: Wednesday, October 07, 2009 11:38 AM To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] QMT on VMWare ESXi Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
Michael Colvin wrote: Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... For a few years I've been running a few in VMware Server on top of Centos 5. I'm currently running them in VMware Server 2 on CentOS 5.2 64-bit. I saw timekeeping issues initially and did some research. I found a VMware whitepaper: http://www.vmware.com/pdf/vmware_timekeeping.pdf. I've attached my notes from studying that whitepaper. Basically you need to not use NTP or other native timekeeping tools in the guest OS, rather install VMware tools and set them to sync the guest with the host. Brent Gardner Time issues in VMWare guests Refer to http://www.vmware.com/pdf/vmware_timekeeping.pdf Guest machines may have issues keeping correct time. Guidelines: - Do not overload the host machine. If it is too busy, guest machines will not get enough host CPU time to keep themselves up to date. - Make sure CPU throttling and/or power management is disabled in BIOS or turned off in the OS on the host. Guest timekeeping depends a lot on the host CPU. - Do not run non-VMWare timekeeping tools on guest machines: - no NTP on Unix-like guests. - disable Windows Time service on Windows guests. - Install VMWare Tools and configure for time sync. VMWare tools are meant to be configured with a GUI tool in the guest OS. For guests that do not support a GUI environment, the relevant setting can be set in the guest's vmx file: tools.syncTime = TRUE - Properly configure non-VMWare timekeeping tools such NTP or Windows Time service on the host machine. Linux guests with 2.6 kernels should have the following kernel option set: clock=pit - or - clocksource=pit Here's an example /etc/grub.conf from a CentOS 5 guest machine: default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-8.1.8.el5) root (hd0,0) kernel /vmlinuz-2.6.18-8.1.8.el5 ro root=/dev/VolGroup00/LogVol00 clocksource=pit initrd /initrd-2.6.18-8.1.8.el5.img title CentOS (2.6.18-8.el5) root (hd0,0) kernel /vmlinuz-2.6.18-8.el5 ro root=/dev/VolGroup00/LogVol00 initrd /initrd-2.6.18-8.el5.img - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
I use this on kernel boot line divider=10 clocksource=acpi_pm this is recommended by vmware and never had problems since Regards Lucian Michael Colvin wrote: Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4488 (20091007) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
RE: [qmailtoaster] QMT on VMWare ESXi
Although I am not running QMT on a ESX host, I have had several other ESX CentOS VMs that suffer from clock tick problems. I highly recommend installing the VMware tools. Installing those tools have resolved the problem every time for me. # mkdir /mnt/cdrom Open the VMware Infrastruce Client, right-click your VM, and select Install/Upgrade VMware Tools. # mount /dev/cdrom /mnt/cdrom # rpm -Uvh /mnt/cdrom/VMwareTools-3.5.0-64607.i386.rpm (or whatever version you have) REBOOT Whenever you replace/update your kernel, you'll have to do the following: # /usr/bin/vmware-config-tools.pl # /etc/rc.d/init.d/network stop # rmmod pcnet32 # rmmod vmxnet # depmod -a # modprob vmxnet # /etc/rc.d/init.d/network start There is a wonderful white paper about VMware time keeping at: http://www.vmware.com/pdf/vmware_timekeeping.pdf Sincerely, -- Joseph Lundgren Systems Engineer Peak Internet, LLC joseph.lundg...@peakinternet.com -Original Message- From: Michael Colvin [mailto:mcol...@norcalisp.com] Sent: Wednesday, October 07, 2009 9:38 AM To: qmailtoaster-list@qmailtoaster.com Subject: [qmailtoaster] QMT on VMWare ESXi Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
Dear Michael, Have u install vmware-tools in the centos qmt guest ??? And in ur ESXi server have u setup ntp server??? if both are set then ur maching should sync time with ur ESXi host time. I am using more than 10 ESX and ESXi server in my environment with amost every OS guest machines and all are having correct time. Most importantly ur ESX host must have a working NTP server configured to keep host and guest to correct time. If u can check and tell more bout ur ESX and guest configs will help in sorting out the problem. Sometimes ISO images are configured with some scripts which are croned and run regularly to set time automatically. please check if ur guest has any such script installed. Secondly make sure that you have rights to change settings on ur guest os. try # ln -sf /usr/share/zoneinfo/urzone(e.g. US)/Cental /etc/localtime Regards, Anil Aliyan - Original Message - From: Michael Colvin mcol...@norcalisp.com To: qmailtoaster-list@qmailtoaster.com Sent: Wednesday, October 07, 2009 10:08 PM Subject: [qmailtoaster] QMT on VMWare ESXi Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
Re: [qmailtoaster] QMT on VMWare ESXi
Make sure kenel-hearders rpm is installed before you install vmware-tools. - Original Message - From: Michael Colvin mcol...@norcalisp.com To: qmailtoaster-list@qmailtoaster.com Sent: Wednesday, October 07, 2009 10:08 PM Subject: [qmailtoaster] QMT on VMWare ESXi Is anyone running the QMT iso on a VMWare VM? I had one set up just to play with, but noticed the clock keeps horrible time. I was able to adjust the ticks to keep it more accurate, along with an hourly sync, but this seems ridiculous. From what I've found, it's an issue with CentOS in a VM, but I've got CentOS running in a VM for a PBX, and it seems fine. This is the only time I've ever had an issue with the system/hardware clock drifting dramatically in a VM. There are also other VM's on this physical server that keep sync fine... Michael J. Colvin NorCal Internet Services www.norcalisp.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com - Qmailtoaster is sponsored by Vickers Consulting Group (www.vickersconsulting.com) Vickers Consulting Group offers Qmailtoaster support and installations. If you need professional help with your setup, contact them today! - Please visit qmailtoaster.com for the latest news, updates, and packages. To unsubscribe, e-mail: qmailtoaster-list-unsubscr...@qmailtoaster.com For additional commands, e-mail: qmailtoaster-list-h...@qmailtoaster.com
