I asked this in Vol 154, Issue 29:
I've a system that has been running CentOS 6 64-bit for almost
4-years and I want to start the move to CentOS 7 64-bit.
I run software RAID-1 with LVM everywhere except /boot which is a
standard partition RAID-1.
There are 2 areas that concern me greatly about this migration:
1. How do I duplicate my current grub configuration file that
supports a failure of /dev/sda to grub2?
2. How do I install CentOS 7 but use my existing hard drive layout
so I only format specific OS file systems. My drive layout goes back
to the original proposed FHS layout. The separate partitions related
to the operating system are:
/boot 1GB (standard boot as defined in fstab is /dev/md0)
The following file systems are all defined in volume group
vg_jpdopsys (size is 64 GB)
/ (root) 6GB
/home 4GB
/opt 4GB
/tmp 2GB
/usr 12GB
/usr/local 2GB
/var 8GB
The following file system is defined in volume group vg_jpdswap
(size is 24 GB)
swap 16GB
Plus many other file system dedicated to specific applications and
data all using logical volume management.
When I moved from CentOS 5 to CentOS 6 all of the OS partitions were
formatted except /home. All went extremely well then.
But I don't see a way to do that with CentOS 7 retaining the
existing disk configuration.
Is there some detailed installation instructions showing some
advanced methods?
TIA
Gene
If you saw the original post you will see that I did clean it up a bit.
I'm starting this move now understanding that I have until 2020 to do it.
Any suggestions?
TIA
Gene
--
Eugene Poole
Woodstock, Georgia
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