Running paravirtualized Linux Kernels as DomU on Sun xVM/Xen 3.4.2 I had the "little" problem that timezone offsets are not correct. My machines are located in Germany so the Timezone in Linux is "Europe/Berlin". The result:
OpenSolaris Dom0: Tuesday, September 22, 2009 7:06:38 AM UTC
Linux SLES 11 DomU: Tue Sep 22 11:06:38 CEST 2009
"CEST" means Central European Summer Time, and the offset should be two hours, not four!
The solution:
Dom0's real time (hardware) clock has to be set to UTC!
Using Linux as Dom0 this would be a simple "hwclock --utc" call. On OpenSolaris the command is:
The result will be written permanently in
Don't forget to do a
DomU Linux machines are immediately changing to the right time (9:06 CEST in the example above).
OpenSolaris Dom0: Tuesday, September 22, 2009 7:06:38 AM UTC
Linux SLES 11 DomU: Tue Sep 22 11:06:38 CEST 2009
"CEST" means Central European Summer Time, and the offset should be two hours, not four!
The solution:
Dom0's real time (hardware) clock has to be set to UTC!
Using Linux as Dom0 this would be a simple "hwclock --utc" call. On OpenSolaris the command is:
rtc -z UTCThe result will be written permanently in
/etc/rtc_config.Don't forget to do a
svcadm disable ntp; ntpdate ...yourtimeserver...; svc enable ntpDomU Linux machines are immediately changing to the right time (9:06 CEST in the example above).
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