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All,

Having a very strange problem. I created a CentOS 7 PV vm but could not get pygrub to pick-up the grub entries. I did some fault finding and concluded that `fsimage` was unable to find the grub.cfg.

I could start the vm as an HVM guest with no problem. I renamed the `grub2` folder to be `grub2.x` and `cp -a` that back to `grub2`. pygrub/fsimage were able to find the file after that. fsimage couldn't see grub2.x/grub.cfg.

I wrote small test case in python to illustrate the issue:

I can only think it is a bug in fsimage, or there is something very hidden about that directory that is causing this.

Any suggestions would be most welcome,

Thanks,

Ian

import fsimage

fs = fsimage.open('/dev/xen2/email', 1048576, "seclabel")

if fs.file_exists('/grub2.x/grub.cfg'):

print "found"

else:

print "not found"

if fs.file_exists('/grub2/grub.cfg'):

print "found"

else:

print "not found"

The results are:-

# python ~/test.py

not found

found

(mounted locally, after an update, but same behaviour as previously. The partition is on LVM and is formatted ext4)

# ls -al grub2*

grub2:

total 52

drwxr-xr-x. 6 root root 4096 May 31 02:39 .

dr-xr-xr-x. 7 root root 4096 May 31 02:41 ..

-rw-r--r--. 1 root root 86 Jan 10 23:32 device.map

drwxr-xr-x. 2 root root 4096 Jan 10 23:32 fonts

-rw-r--r--. 1 root root 4806 May 31 02:39 grub.cfg

-rw-r--r--. 1 root root 4045 Jan 10 23:33 grub.cfg.1496194637.rpmsave

-rw-r--r--. 1 root root 1024 May 31 02:39 grubenv

drwxr-xr-x. 2 root root 12288 Jan 10 23:32 i386-pc

drwxr-xr-x. 2 root root 4096 Jan 10 23:32 locale

drwxr-xr-x. 3 root root 4096 Jan 10 23:28 themes

-rw-r--r--. 1 root root 0 May 31 02:13 xxxx

grub2.x:

total 44

drwxr-xr-x. 6 root root 4096 May 31 02:13 .