Based on a previous question, I installed ipmitool (yum install ipmitool).

Even after a reboot, though, i get the following error when trying to run ipmitool power status:

Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory
Unable to get Chassis Power Status

Is this an OS/hardware issue (CentOS 6.3 x64 on a hosted machine in a remote datacenter - unsure on hardware vendor)? Or have I missed something more elemental in installing ipmitool?

  • Does the system have IPMI-capable hardware (a system management controller or equivalent)? Is that hardware supported by the operating system? (If a kernel module is required for support, is it loaded?) – voretaq7 Feb 19 '13 at 17:32
  • @voretaq7 - unsure, hence the qualifier that I do not know what hardware vendor (beyond basics) my server is :) – warren Feb 19 '13 at 17:35
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    Knowing such things is important -- lacking that knowledge you can try blindly loading all the IPMI kernel modules you can find as described in the answers below (but be aware that you might not have IPMI-capable hardware so it might not get you any results, and by loading modules you always have a (small) chance of knocking your system down in the process and would need someone to power cycle it) – voretaq7 Feb 19 '13 at 17:39
  • Run dmidecode -t 1 -t -2 -t 3. Then read the output. – Michael Hampton Feb 19 '13 at 17:41
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    Also, you may need to run ipmitool as root or with sudo (I get the same error message if I don't). – Paused until further notice. Mar 5 '14 at 20:43

You probably need to load the IPMI kernel modules:

modprobe ipmi_devintf
modprobe ipmi_si

You can add these to /etc/modules to have them loaded automatically (just list the module names):

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  • I don't have an /etc/modules - I have /etc/modprobe.d/*.conf: thoughts on which would be needed? – warren Feb 19 '13 at 17:34
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    @warren Just create it (I've described the format above). – mgorven Feb 19 '13 at 17:36
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    Why isn't this included in the instructions for using ipmi? I'm using the latest Debian on an HP G8 server, and it still requires this workaround, giving out an error from apt-get! – cnst Mar 31 '15 at 16:38

Do you have the devices loaded ? You can load manually the modules : modprobe ipmi_devintf ; modprobe ipmi_si and check your logs

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    the first ran fine; the second kicked-back FATAL: Error inserting ipmi_si (/lib/modules/2.6.32-279.22.1.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko): No such device – warren Feb 19 '13 at 17:33
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    OK it is maybe another impi driver. Check in the /lib/modules/2.6.32-279.22.1.el6.x86_64/kernel/drivers/char/ipmi/ directory which are available on your plateform – Dom Feb 19 '13 at 17:36
  • @dom do you know which one to choose and why? There are some: find /lib/modules/$(uname -r)/kernel/drivers/char/ipmi/ -type f -name '*.ko*' -exec modinfo {} \; | egrep "^filename|^description". – Pablo A Jan 30 '18 at 4:27
  • The interface is "ipmi_devintf" and the main constructor is manage by "ipmi_si". What are the other ones ? On debian, there are msghandler, watchdog and poweroff. They are managing the hardware watchdog to reset the host, dirty poweroff the host and I don't know for msghandler. – Dom Jan 30 '18 at 7:54

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