GrubEnv - file /boot/grub2/grubenv

This parser reads the GRUB environment block file. The file is laid out in a key=value format similar to an ini file except it doesn’t have any headers.

The parser stores the key/value pairs in itself which inherits a dict. This file is only used in Grub 2, but in RHEL8 with BLS being the default. There were several variables added that are referenced in the /boot/loader/entries/*.conf files.

class insights.parsers.grubenv.GrubEnv(context)

Bases: insights.core.Parser, dict

Parses the /boot/grub2/grubenv file and returns a dict of the grubenv variables.

Sample output of the file:

saved_entry=295e1ba1696e4fad9e062f096f92d147-4.18.0-305.el8.x86_64
kernelopts=root=/dev/mapper/root_vg-lv_root ro crashkernel=auto resume=/dev/mapper/root_vg-lv_swap rd.lvm.lv=root_vg/lv_root rd.lvm.lv=root_vg/lv_swap console=tty0 console=ttyS0,115200
boot_success=0
boot_indeterminate=2
tuned_params=transparent_hugepages=never
tuned_initrd=

has_kernelopts

Returns True/False depending on if kernelopts key is in the dict.

Type

bool

kernelopts

Returns the string of kernelopts from the dict.

Type

bool

has_tuned_params

Returns True/False depending of if the tuned_params key is in the dict.

Type

str

tuned_params

Returns the string of tuned_params from the dict.

Type

str

Examples

>>> type(grubenv)
<class 'insights.parsers.grubenv.GrubEnv'>
>>> grubenv.has_kernelopts
True
>>> grubenv.kernelopts
'root=/dev/mapper/root_vg-lv_root ro crashkernel=auto resume=/dev/mapper/root_vg-lv_swap rd.lvm.lv=root_vg/lv_root rd.lvm.lv=root_vg/lv_swap console=tty0 console=ttyS0,115200'
>>> grubenv.has_tuned_params
True
>>> grubenv.tuned_params
'transparent_hugepages=never'
>>> grubenv['saved_entry']
'295e1ba1696e4fad9e062f096f92d147-4.18.0-305.el8.x86_64'

parse_content(content)

This method must be implemented by classes based on this class.