About my confusion.
I'm trying to setup Ubuntu Server 10.04 LTS onto two 1 TB physical hard drives built into a server. I don't have a lot of experience with Ubuntu Server yet but I'm familiar with Ubuntu Desktop.
I like the learning by doing approach - therefore I googled around for many hours and read lots of ressources about Ubuntu Server installations, especially the parts about partitioning since I never configured a RAID1 setup on Linux before.
Confused about the huge number of different opinions and all these different 'best practises', I just started by booting the machine using an Ubuntu Server 10.04 alternate install LiveCD.
About my confusion projected onto a hard drive.
I'm stuck at the partitioning screen having no idea what I have done or what I should do next. You don't have to be a genius to notice, that Ubuntu won't install using the configuration below.
What bothers me are these ugly little details like the wasted 980 KB sitting around 'unused' or these 'Unknown' labels next to the RAID-Devices.
Anyway, this is what I've got so far:
SCSI2 (0,0,0) (sda) - 1.0 TB ATA SAMSUNG HD103SJ SCSI2 (0,0,0) (sdb) - 1.0 TB ATA SAMSUNG HD103SJ [same config] Nr. 1 primary 149.9 MB K raid Nr. 5 logical 4.0 GB K raid Nr. 6 logical 996.1 GB K raid
These partitions got configured using the "Configure Software-RAID" option provided by the ubuntu installer.
RAID1 Device #0 - 148.9 MB Unknown Nr. 1 148.9 MB K ext4 /boot RAID1 Device #1 - 4.0 GB Unknown Nr. 1 4.0 GB K Swap RAID1 Device #2 - 996.1.0 GB Software-RAID-Device Nr. 1 996.1.0 GB K lvm **983.0 KB K unused**
Then I created a locigal volume group on RAID-Device #2 and configured the following LVs:
LVM VG vg1, LV backup - 250.0 GB Linux device-mapper (linear) Nr. 1 250.0 GB K ext4 /backup LVM VG vg1, LV home - 2.0 GB Linux device-mapper (linear) Nr. 1 2.0 GB K ext4 /home LVM VG vg1, LV root - 20.0 GB Linux device-mapper (linear) Nr. 1 20.0 GB K ext4 / LVM VG vg1, LV tmp - 5.0 GB Linux device-mapper (linear) Nr. 1 5.0 GB K ext4 /tmp LVM VG vg1, LV var - 5.0 GB Linux device-mapper (linear) Nr. 1 20.0 GB K ext4 /var LVM VG vg1, LV var - 714.1 GB Linux device-mapper (linear) Nr. 1 714.1 GB K ext4 /vhosts
About my plans, before there was confusion.
(A) I'm aiming for a system configuration with this functionality:
- Ubuntu Server 10.04 LTS running with RAID1 configured
- Webserver with isolated virtual hostings
- Secure partition layout that provides stability when it comes down to log flooding DOS a ttacks, web vulnerability scanners and all the other toys, that are able to bring a server down.
(B) This is what I plan to use:
- A LVM setup based on a RAID1 Array of two HDs
- Standard PHP, MySQL, Apache setup
- OpenVZ to setup virtual hosts; running isolated instances of apache/php/etc. inside these
I messed up my hard drive setup during installation so I have to start over again but I don't know how to get it right this time. I am trying to get a setup providing the functionality listed under (A).
Please share your thoughts about what could be a better way than my plans listed under (B). Furthermore, what is - in your opinion - the best partion layout for this system?
Please share your experiences, I am happy about every advice.
Thanks in advance and sorry about the long posting - it's the confusion you have to blame.