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# Build a Debian/Ganeti System on vm0.bknix.co.th
With much help from [https://nsrc.org/workshops/2014/sanog23-virtualization/raw-attachment/wiki/Agenda/ex-ganeti-install.htm](https://nsrc.org/workshops/2014/sanog23-virtualization/raw-attachment/wiki/Agenda/ex-ganeti-install.htm).
And [And https://nsrc.org/workshops/2014/sanog23-virtualization/wiki/Agenda](https://nsrc.org/workshops/2014/sanog23-virtualization/wiki/Agenda) is also helpful.
------
Boot into MegaRaid BIOS and configure the four drives as one RAID5 for the 1RU and RAID6 for the 2RUs.
### Install Debian
- Boot Debian CD/ISO
- Choose Install
- Choose English, UK (so you can get UCT)
- Choose American English
- Name the host
- Choose root password
- Choose user name and password
- Partition
- Choose Manual Partitioning
- Select the drive
- Create new empty partition table
- Select Free Space
- Create new partition, primary, 1GB, begining, bios
- Done
- Select Free Space
- Create new partition, primary, 256MGB, begining, /boot, ext4, bootable
- Done
- Select Free Space again
- Create a new partition
- Accept whatever size is shown (the rest of the disk)
- Primary, physical volume for LVM
- Done
- Configure LVM
- Configure LVM accepting write changes to disks
- Create volume group
- Volume group name: ganeti
- Devices for the new volume group: select only the LVM partition
- Create Logical Volume: on ganeti, root, 16G
- Create Logical Volume: on ganeti, swap, 16G
- Create Logical Volume: on ganeti, var, 16G
- Edit the Logical Volumes to be ext4 /, swap, and ext4 /var
- Finish partitioning and write changes
- Finish partitioning and write changes to disk
- Be sure it will not boot CD-ROM, and Reboot from the installed system
## Finish Debian Installation
Clean up from CDROM sources
```
vi /etc/apt/sources.list
```
and delete the two CDROM entries at the top
Install homey things (it's not a computer without emacs:)
```
apt-get update
apt-get upgrade
apt-get install emacs23-nox
apt-get install rsync
apt-get install gcc
apt-get install bridge-utils vlan
apt-get install sudo
apt-get install unbound
usermod -G sudo -a randy
```
Fix hostname
```
echo vm0.bknix.co.th > /etc/hostname
hostname `cat /etc/hostname`
```
Fix /etc/unbound/unbound.conf
```
access-control: 127.0.0.0/8 allow
access-control: 203.159.68.0/22 allow
access-control: 0.0.0.0/0 refuse
access-control: ::1 allow
access-control: ::ffff:127.0.0.1 allow
access-control: 2001:deb::/48
access-control: ::0/0 refuse
```
### Unattended Upgrades, syslog-NG, etc.
[Install Unattended Upgrading](http://www.howtoforge.com/how-to-configure-automatic-updates-on-debian-squeeze)
Install syslog-ng
```
apt-get install syslog-ng
```
Hack /etc/logrotate.d/syslog-ng
```
*** /etc/logrotate.d/syslog-ng~ 2013-03-20 17:30:26.000000000 +0000
--- /etc/logrotate.d/syslog-ng 2014-07-31 14:00:08.148813531 +0100
***************
*** 29,34 ****
--- 29,36 ----
missingok
notifempty
compress
+ mailfirst
+ mail randy@psg.com
delaycompress
sharedscripts
postrotate
```
Fix Exim
```
dpkg-reconfigure exim4-config
```
Use internet mail
System name is vm0.bknix.co.th
Only listen on local interfaces
Relay mail for noone
## Debian Ganeti Specific Configuration
Edit /etc/hosts to have the real address of the host, e.g.
```
127.0.0.1 localhost
203.159.71.10 vm0.bknix.co.th vm0
203.159.71.11 vm1.bknix.co.th vm1
203.159.71.12 vm2.bknix.co.th vm2
203.159.71.42 gnt0.bknix.co.th gnt0
```
### Fix /etc/network/interfaces
Make eth0 hang off of whatever your bridge will be called
```
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# public LAN
auto eth0
iface eth0 inet manual
auto br-public
iface br-public inet manual
dns_nameservers 127.0.0.1 203.159.70.11 203.159.70.12
dns_search bknix.co.th rg.net
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
# internal LAN
auto eth1
iface eth1 inet manual
iface eth1.222 inet manual
vlan_raw_device eth1
iface eth1.444 inet manual
vlan_raw_device eth1
auto br-internal
iface br-internal inet static
address 203.159.71.10
netmask 255.255.255.0
gateway 203.159.71.1
bridge_ports eth1.222
bridge_stp off
bridge_fd 0
bridge_maxwait 0
auto br-cluster
iface br-cluster inet static
address 10.0.1.10
netmask 255.255.255.0
bridge_ports eth1.444
bridge_stp off
bridge_fd 0
bridge_maxwait 0
#iface eth0 inet6 auto
```
Check /etc.resolv.comf
In theory, this looks like
```
-------------+--------------
|
br-lan
| this host
+---------+---------+
| eth0 |
| |
|eth0.255 eth0.101|
+--+-----------+----+
| |
br-svc br-rep
| |
VMs --------+ +------> to other ganeti hosts
```
## Install Ganeti
Set up to get Ganeti from backports on all three servers, vm0, vm1, and vm2
```
cat > /etc/apt/sources.list.d/wheezy-backports.list
deb http://cdn.debian.net/debian/ wheezy-backports main
```
And then install it on all three servers
```
apt-get update
apt-get install ganeti/wheezy-backports
```
Fix up drbd
```
echo "options drbd minor_count=128 usermode_helper=/bin/true" > /etc/modprobe.d/drbd.conf
rmmod drbd # ignore any error
modprobe drbd
```
### Initialize and Build Ganeti Cluster
```
gnt-cluster init \
--master-netdev=br-internal \
--enabled-hypervisors=kvm \
-H kvm:kernel_path="",initrd_path="" \
--vg-name=ganeti \
-N link=br-cluster \
-s 10.0.1.10 \
gnt0.bknix.co.th
```
If it barfs, try
```
gnt-cluster destroy --yes-do-it
```
then re-run gnt-cluster init ...
If you get into gnutls problems check apt-get upgrade and dist-upgrade
### Check That Cluster is Happy
Fix VNC passwording
```
echo 'fnillies' > /etc/ganeti/vnc-cluster-password
gnt-cluster modify -H kvm:vnc_password_file=/etc/ganeti/vnc-cluster-password
```
Test that the cluster was built happily
```
gnt-cluster verify
```
If you get
```
Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/root is unknown
Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/swap is unknown
Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/var is unknown
```
That's OK. To make it go away
```
gnt-cluster modify --reserved-lvs=ganeti/root,ganeti/swap,ganeti/var
```
Now add vm1 and vm2 to the cluster by the following on vm0
```
gnt-node add -s 10.0.1.11 vm1.bknix.co.th
gnt-node add -s 10.0.1.12 vm2.bknix.co.th
```
which should result in
```
vm0.bknix.co.th:/root# gnt-node add -s 10.0.1.11 vm1.bknix.co.th
-- WARNING --
Performing this operation is going to replace the ssh daemon keypair
on the target machine (vm1.bknix.co.th) with the ones of the current one
and grant full intra-cluster ssh root access to/from it
The authenticity of host 'vm1.bknix.co.th (203.159.71.11)' can't be established.
ECDSA key fingerprint is 2f:48:91:f7:f2:dd:c4:95:da:30:d2:f4:92:6a:53:ec.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'vm1.bknix.co.th' (ECDSA) to the list of known hosts.
Restarting OpenBSD Secure Shell server: sshd.
Fri Aug 22 05:37:53 2014 - INFO: Node will be a master candidate
```