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why pxe bootloader after os deployed

asked 2014-08-20 20:57:51 -0500

Eric Xie gravatar image

updated 2014-08-27 14:29:42 -0500

smaffulli gravatar image

I found OpenStack always booted from PXE after baremetal instance deployed. Anyone knows why? The baremetal instance will always boot from PXE after it deployed successfully. Why not boot from Hard disk with GRUB?

This confuses me a lot.

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Thanks for the added details (I put them back into the question to make it more clear). I still don't understand what the problem is, besides your confusion: do you find that to be slower? has security implications? something else?

smaffulli gravatar imagesmaffulli ( 2014-08-22 16:31:21 -0500 )edit

Thanks. At firstly, i think that it uses for boot without disk through PXE-boot. But at least one hard disk is required for storing the master image. So that there are two requirements for boot:1)network ok for PXE;2)disk ok.Why not designed to boot from disk which network is not essential?

Eric Xie gravatar imageEric Xie ( 2014-08-28 20:47:25 -0500 )edit

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answered 2014-08-27 19:41:08 -0500

If I understand your question correctly : Boot order from PXE/Disk can be configured in your BIOS setting. I don't think OpenStack deployment will change BIOS boot order setting. The scenario could be that in order to setup OpenStack, the MAC address of this bare metal server was registered into the Kickstart server. If the BIOS boot order in the bare metal server happens to have "boot from network" as the first one in boot options and "boot from disk" as the second, then it will boot from PXE for every reboot. You can fix it by changing the order in the BIOS setting.

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Thanks for your reply. The baremetal instance deployment with IRONIC changes boot order.

Eric Xie gravatar imageEric Xie ( 2014-08-28 20:51:08 -0500 )edit

Thank you. I did not realize IRONIC would do that.

Lawrence Lo gravatar imageLawrence Lo ( 2014-08-29 13:03:56 -0500 )edit

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Asked: 2014-08-20 20:57:51 -0500

Seen: 281 times

Last updated: Aug 27 '14