[CentOS] Cannot boot CentOS 7 VM after updating Host CentOS 7 Kernel
Eero Volotinen
eero.volotinen at iki.fi
Sun Oct 30 21:05:43 UTC 2016
so, Just chroot to mountpoint:
http://www.cyberciti.biz/faq/unix-linux-chroot-command-examples-usage-syntax/
chroot /mounted/path /bin/bash and then .. mkinitrd (see man page for
documentation)
2016-10-30 22:57 GMT+02:00 Eero Volotinen <eero.volotinen at iki.fi>:
> A bit hard to say. Try chrooting into environment and rebuilding initrd?
>
> --
> Eero
>
> 2016-10-30 22:53 GMT+02:00 Paul R. Ganci <ganci at nurdog.com>:
>
>> On 10/30/2016 12:26 PM, Paul R. Ganci wrote:
>>
>>> <snip>I am thinking of putting the CentOS iso out and then booting the
>>> VM into it just to poke around the file system. Otherwise my other option
>>> is to just clone a twin VM on another server and then just change the
>>> networking IPs/hostname. Anybody have any other ideas as to how to debug
>>> this problem?
>>>
>> So I booted off the CentOS-7-x86_64-DVD-1511.iso and everything looks
>> just fine:
>>
>> > df
>> Filesystem 1K-blocks Used Available
>> Use% Mounted on
>> /dev/mapper/live-rw 2030899 949022 1077781 47% /
>> devtmpfs 2004040 0 2004040
>> 0% /dev
>> tmpfs 2023652 0 2023652
>> 0% /dev/shm
>> tmpfs 2023652 8520 2015132
>> 1% /run
>> tmpfs 2023652 0 2023652
>> 0% /sys/fs/cgroup
>> /dev/sr1 4227724 4227724 0 100%
>> /run/install/repo
>> tmpfs 2023652 200 2023452
>> 1% /tmp
>> /dev/mapper/centos-root 10799104 3894196 6904908 37%
>> /mnt/sysimage
>> /dev/vda1 508588 143516 365072 29%
>> /mnt/sysimage/boot
>> tmpfs 2023652 0 2023652
>> 0% /mnt/sysimage/dev/shm
>>
>> > ls /mnt/sysimage
>> bin boot dev etc home lib lib64 media misc mnt net
>> opt proc root run sbin srv sys tmp usr var
>>
>> > ls -l /mnt/sysimage/boot
>> total 109424
>> -rw-r--r--. 1 root root 126431 Oct 10 23:18
>> config-3.10.0-327.36.2.el7.x86_64
>> drwxr-xr-x. 2 root root 26 Oct 2 2015 grub
>> drwx------. 6 root root 104 Oct 13 02:21 grub2
>> -rw-r--r--. 1 root root 40655493 Apr 3 2015
>> initramfs-0-rescue-6494b5d98adc4f66b0cf4c19a0f6ab66.img
>> -rw-------. 1 root root 29666884 Oct 13 01:25
>> initramfs-3.10.0-327.36.2.el7.x86_64.img
>> -rw-------. 1 root root 18119089 Oct 13 02:20
>> initramfs-3.10.0-327.36.2.el7.x86_64kdump.img
>> -rw-r--r--. 1 root root 10190975 Dec 19 2015 initrd-plymouth.img
>> -rw-r--r--. 1 root root 252739 Oct 10 23:20
>> symvers-3.10.0-327.36.2.el7.x86_64.gz
>> -rw-------. 1 root root 2965270 Oct 10 23:18
>> System.map-3.10.0-327.36.2.el7.x86_64
>> -rwxr-xr-x. 1 root root 4902656 Apr 3 2015
>> vmlinuz0-rescue-6494b5d98adc4f66b0cf4c19a0f6ab66
>> -rwxr-xr-x. 1 root root 5157936 Oct 10 23:18
>> vmlinuz-3.10.0-327.36.2.el7.x86_64
>>
>> So the CentOS DVD iso in linux rescue mode shows that everything is there
>> and can be mounted. I guess that means somehow either grub itself is
>> corrupted or one of the boot images. So is there a way for me to generate a
>> new initrd while booted in linux resuce mode or will re-installing grub
>> help? How would I attempt re-installing grub while booted in linux rescue
>> mode?
>>
>> --
>> Paul (ganci at nurdog.com)
>> Cell: (303)257-5208
>> _______________________________________________
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>>
>
>
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