# 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 ```