Set the boot device via IPMI (next boot and future boots)

If for example as part of your baremetal automation you need to change the boot order of the machine, for example to force it to boot from network or remote ISO, you can use ipmitool to set the boot order (or just force for the next reboot a specific boot method).

Get the current boot device

One can query the current BIOS boot device order using ipmi, with the `bootparam` option,

bootparam

Get or set various system boot option parameters.

get

Get boot parameter. Currently supported values for are:

    0 - Set In Progress
    1 - Service Partition Selector
    2 - Service Partition Scan
    3 - BMC Boot Flag Valid Bit Clearing
    4 - Boot Info Acknowledge
    5 - Boot Flags
    6 - Boot Initiator Info
    7 - Boot Initiator Mailbox
# IPMI_HOST=10.20.30.40
# IPMI_USER=root
ipmitool -H $IPMI_HOST -U $IPMI_USER chassis bootparam get 5 
chassis bootparam get 5 
Boot parameter version: 1 
Boot parameter 5 is valid/unlocked 
Boot parameter data: c008000000 
Boot Flags : 
- Boot Flag Valid 
- Options apply to all future boots 
- BIOS PC Compatible (legacy) boot  
- Boot Device Selector : Force Boot from default Hard-Drive 
- Console Redirection control : System Default 
- BIOS verbosity : Console redirection occurs per BIOS configuration setting (default) 
- BIOS Mux Control Override : BIOS uses recommended setting of the mux at the end of POST

Set the boot device for next boot

# ipmitool chassis bootparam set bootflag force_pxe
Set Boot Device to force_pxe

And if we read the above option again, will get

# ipmitool chassis bootparam get 5

Boot parameter version: 1
Boot parameter 5 is valid/unlocked
Boot parameter data: 8004000000
 Boot Flags :
   - Boot Flag Valid
   - Options apply to only next boot
   - BIOS PC Compatible (legacy) boot 
   - Boot Device Selector : Force PXE
   - Console Redirection control : System Default
   - BIOS verbosity : Console redirection occurs per BIOS configuration setting (default)
   - BIOS Mux Control Override : BIOS uses recommended setting of the mux at the end of POST

Set fixed boot device (persistent)

# ipmitool chassis bootdev cdrom options=persistent
Set Boot Device to cdrom
# ipmitool chassis bootparam get 5

Boot parameter version: 1
Boot parameter 5 is valid/unlocked
Boot parameter data: c014000000
 Boot Flags :
   - Boot Flag Valid
   - Options apply to all future boots
   - BIOS PC Compatible (legacy) boot 
   - Boot Device Selector : Force Boot from CD/DVD
   - Console Redirection control : System Default
   - BIOS verbosity : Console redirection occurs per BIOS configuration setting (default)
   - BIOS Mux Control Override : BIOS uses recommended setting of the mux at the end of POST

What about UEFI

Almost the same just add the `efiboot` to the options parameter.

ipmitool chassis bootdev pxe options=efiboot
#or
ipmitool chassis bootdev pxe options=efiboot,persistent

Resources

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