3.5.3. Disabling ACPI Completely in the grub.conf File
The preferred method of disabling ACPI Soft-Off is with
chkconfigmanagement (Section 3.5.2, “Disabling ACPI Soft-Off with
chkconfigManagement”). If the preferred method is not effective for your cluster, you can disable ACPI Soft-Off with the BIOS power management (Section 3.5.1, “Disabling ACPI Soft-Off with the BIOS”). If neither of those methods is effective for your cluster, you can disable ACPI completely by appending
acpi=offto the kernel boot command line in the
This method completely disables ACPI; some computers do not boot correctly if ACPI is completely disabled. Use this method only if the other methods are not effective for your cluster.
You can disable ACPI completely by editing the
grub.conffile of each cluster node as follows:
/boot/grub/grub.confwith a text editor.
acpi=offto the kernel boot command line in
/boot/grub/grub.conf(see Example 3.2, “Kernel Boot Command Line with
acpi=offAppended to It”).
- Reboot the node.
- When the cluster is configured and running, verify that the node turns off immediately when fenced.
NoteYou can fence the node with the
fence_nodecommand or Conga.
Example 3.2. Kernel Boot Command Line with
acpi=off Appended to It
# grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/mapper/vg_doc01-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/hda default=0 timeout=5 serial --unit=0 --speed=115200 terminal --timeout=5 serial console title Red Hat Enterprise Linux Server (2.6.32-193.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-193.el6.x86_64 ro root=/dev/mapper/vg_doc01-lv_root console=ttyS0,115200n8 acpi=off initrd /initramfs-2.6.32-131.0.15.el6.x86_64.img
In this example,
acpi=offhas been appended to the kernel boot command line — the line starting with "kernel /vmlinuz-2.6.32-193.el6.x86_64.img".