Re: [CentOS] [Marketing Mail] Re: [External] Re: [Marketing Mail] Create CentOS 6 system as "clone" of another - with LVM and different disk sizes
On 13/04/18 16:36, Lange, Markus wrote:
Hi,
I could be wrong, but afaik clonezilla makes bit-accurate copies of the file
system like dd does. Therefore, no configurations should be adapted.
You are wrong. Not only is it unlike "dd" in that it will copy only the
used space, and also let you to restore to a filesystem of a different
size (while keeping that size), but it certainly changes config files,
too - although I suspect it can only do simple edits to get around some
obvious issues. I'll for instance get lines like
#HWADDR= # Commented out by Clonezilla
after restoring ifcfg files that originally had just
HWADDR=
- T
Usually
Linux doesn't care where it runs, as long as the underlying 'hardware' (or
virtual hardware) architecture matches.
However, there are a number of configuration files that need to be modified for
such clones, including network settings (local or on your dhcp server),
{crypt,fs}tab (if no bit-accurate copy of the filesystem was used),
/etc/host{s,name} depending on your network setup.
best regards,
- MarkusOn Fr, 2018-04-13 at 15:45 +0200, Toralf Lund wrote:
On 13/04/18 15:32, Lange, Markus wrote:
Hi,
You can simply boot a live system to create your partition layout and copy
it
over the existing system with rsync. Once your system is copied, you will
need
to customize all hardware-dependent configuration files such as
{crypt,fs}tab,
network configurations, bootloader and so on depending on your setup.
Don't forget to install the bootloader afterwards!
You can also install a minimal system and use a live system to copy the
files
from the existing server to the new one (e.g. with rsync -a). This way you
do
not have to create the partition layout and bootloader manually.
Using clonezilla would only replace the part of copying the files and
installing
the bootloader, all other settings still have to be made.
Actually, I don't believe that's quite true. I've "cloned" to dissimilar
hardware in the same manner before, and found that there was special
handling of various hardware dependent config files, so that I didn't
get set-up for the "wrong" type.
- Toralf
Rsync should be much
faster for data transfer.
Best regards,
- Markus
On Fr, 2018-04-13 at 14:46 +0200, Toralf Lund wrote:
Hi,
I just found myself having to set up a new CentOS 6 system with a nearly
identical configuration to an existing host, so I thought I would just
1. Do a minimal install to set up partitions etc. on the new system.
2. Create an image of the existing system using Clonezilla
(https://urldefense.proofpoint.com/v2/url?u=http-3A__www.clonezilla.o
rg=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ=Q0oqxzgUp3xCCI
iJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
Vakjf6lKeZVlmfp_AaqPakYDOV1c=7DzBbYmBU7fUsxgvVL-
59HG_y2uuwR1jxcbXX5skfGM= )
3. Run a Clonezilla restore on the new system.
- as I though it would be a lot simpler than replicating the exact
package selection, installing the same users, doing the same manual
config edits (which are required) etc.
It turns out that it wasn't quite as easy, though. The problem is that
the system use LVM2 volumes for the filesystems, and the new host has a
slightly smaller disk than the other, and Clonezilla seems unable to
restore to a volume that's smaller than the one that was cloned - even
if the actual data fits.
I guess I could temporarily reduce the LVM volume sizes on the existing
units and clone again, but I'd rather not if I can avoid it. Just
copying file-by-file could be an option, too, but I somehow feel less
comfortable doing that than the above; there is something about the way
I could end up with a mixture of my "minimal install" and the "cloned"
data, I suppose.
Does anyone have any other ideas about how I might achieve what I want?
- Toralf
___
CentOS mailing list
CentOS@centos.org
https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.centos.org_mail
man_listinfo_centos=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ
=Q0oqxzgUp3xCCIiJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
Vakjf6lKeZVlmfp_AaqPakYDOV1c=qjiIy57nu_S3OjTO1LYJjQmDFY6GkzLkKvn2F5IrUqo
=
___
CentOS mailing list
CentOS@centos.org
https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.centos.org_mailma
n_listinfo_centos=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ=Q
0oqxzgUp3xCCIiJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
Vakjf6lKeZVlmfp_AaqPakYDOV1c=qjiIy57nu_S3OjTO1LYJjQmDFY6GkzLkKvn2F5IrUqo
=
___
CentOS mailing list
CentOS@centos.org
https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.centos.org_mailman_listinfo_centos=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ=Q0oqxzgUp3xCCIiJDwS-RbNDndQ-KZDhj8wwveNoqU4=hBL1h5rjxowWLKA5frJdxxdj6KpX3_Zg0DwyXtungr0=4D7qR0_OGLXo-T_IIKDZAfm70VMLD8TFXKtd0cz-qJw=
___
CentOS mailing list
Re: [CentOS] [Marketing Mail] Re: [External] Re: [Marketing Mail] Create CentOS 6 system as "clone" of another - with LVM and different disk sizes
Hi,
I could be wrong, but afaik clonezilla makes bit-accurate copies of the file
system like dd does. Therefore, no configurations should be adapted. Usually
Linux doesn't care where it runs, as long as the underlying 'hardware' (or
virtual hardware) architecture matches.
However, there are a number of configuration files that need to be modified for
such clones, including network settings (local or on your dhcp server),
{crypt,fs}tab (if no bit-accurate copy of the filesystem was used),
/etc/host{s,name} depending on your network setup.
best regards,
- MarkusOn Fr, 2018-04-13 at 15:45 +0200, Toralf Lund wrote:
> On 13/04/18 15:32, Lange, Markus wrote:
> >
> > Hi,
> >
> > You can simply boot a live system to create your partition layout and copy
> > it
> > over the existing system with rsync. Once your system is copied, you will
> > need
> > to customize all hardware-dependent configuration files such as
> > {crypt,fs}tab,
> > network configurations, bootloader and so on depending on your setup.
> >
> > Don't forget to install the bootloader afterwards!
> >
> > You can also install a minimal system and use a live system to copy the
> > files
> > from the existing server to the new one (e.g. with rsync -a). This way you
> > do
> > not have to create the partition layout and bootloader manually.
> >
> > Using clonezilla would only replace the part of copying the files and
> > installing
> > the bootloader, all other settings still have to be made.
> Actually, I don't believe that's quite true. I've "cloned" to dissimilar
> hardware in the same manner before, and found that there was special
> handling of various hardware dependent config files, so that I didn't
> get set-up for the "wrong" type.
>
> - Toralf
>
> >
> > Rsync should be much
> > faster for data transfer.
> >
> > Best regards,
> > - Markus
> > On Fr, 2018-04-13 at 14:46 +0200, Toralf Lund wrote:
> > >
> > > Hi,
> > >
> > > I just found myself having to set up a new CentOS 6 system with a nearly
> > > identical configuration to an existing host, so I thought I would just
> > >
> > > 1. Do a minimal install to set up partitions etc. on the new system.
> > > 2. Create an image of the existing system using Clonezilla
> > > (https://urldefense.proofpoint.com/v2/url?u=http-3A__www.clonezilla.o
> > > rg=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ=Q0oqxzgUp3xCCI
> > > iJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
> > > Vakjf6lKeZVlmfp_AaqPakYDOV1c=7DzBbYmBU7fUsxgvVL-
> > > 59HG_y2uuwR1jxcbXX5skfGM= )
> > > 3. Run a Clonezilla restore on the new system.
> > >
> > > - as I though it would be a lot simpler than replicating the exact
> > > package selection, installing the same users, doing the same manual
> > > config edits (which are required) etc.
> > >
> > > It turns out that it wasn't quite as easy, though. The problem is that
> > > the system use LVM2 volumes for the filesystems, and the new host has a
> > > slightly smaller disk than the other, and Clonezilla seems unable to
> > > restore to a volume that's smaller than the one that was cloned - even
> > > if the actual data fits.
> > >
> > > I guess I could temporarily reduce the LVM volume sizes on the existing
> > > units and clone again, but I'd rather not if I can avoid it. Just
> > > copying file-by-file could be an option, too, but I somehow feel less
> > > comfortable doing that than the above; there is something about the way
> > > I could end up with a mixture of my "minimal install" and the "cloned"
> > > data, I suppose.
> > >
> > > Does anyone have any other ideas about how I might achieve what I want?
> > >
> > > - Toralf
> > >
> > > ___
> > > CentOS mailing list
> > > CentOS@centos.org
> > > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.centos.org_mail
> > > man_listinfo_centos=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ
> > > =Q0oqxzgUp3xCCIiJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
> > > Vakjf6lKeZVlmfp_AaqPakYDOV1c=qjiIy57nu_S3OjTO1LYJjQmDFY6GkzLkKvn2F5IrUqo
> > > =
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.centos.org_mailma
> > n_listinfo_centos=DwIGaQ=KV_I7O14pmwRcmAVyJ1eg4Jwb8Y2JAxuL5YgMGHpjcQ=Q
> > 0oqxzgUp3xCCIiJDwS-RbNDndQ-KZDhj8wwveNoqU4=LuCuhEh29vlP9l-
> > Vakjf6lKeZVlmfp_AaqPakYDOV1c=qjiIy57nu_S3OjTO1LYJjQmDFY6GkzLkKvn2F5IrUqo
> > =
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
