Ubuntu Server 12.04.2 KVM Host Setup

#!/bin/bash
#KVM Virtual machine host package installation:

apt-get install ubuntu-virt-server

#set scheduler on all sd? devices

find /dev/ -name sd? -type b | cut --delimiter='/' -f3 | while read -r; do echo "deadline" > /sys/block/$REPLY/queue/scheduler; done && \
find /dev/ -name sd? -type b | cut --delimiter='/' -f3 | while read -r; do echo -n "$REPLY:";cat /sys/block/$REPLY/queue/scheduler; done

#configure default io scheduler to deadline
sed -i 's/GRUB_CMDLINE_LINUX=""/GRUB_CMDLINE_LINUX="elevator=deadline"/g' /etc/default/grub && sudo update-grub

#configure fstab mount options to relatime(assumes ext4 file systems)

sed -i -r 's/ext4(\s+)errors/ext4\1relatime,errors/g' /etc/fstab

#remount all filesystems with relatime using UUID
cat /etc/fstab | grep relatime | cut -f1 --delimiter=' ' | cut -f2 --delimiter='=' | xargs --verbose mount -o remount -U

#install NTP and configure to sync time with at least 2 local NTP servers if available

apt-get install -y ntp && service ntp stop
read -p "Enter IP/URL of primary time server:" primary_ntp_server && read -p "Enter IP/URL of backup time server:" backup_ntp_server
cat <<EOF >/etc/ntp.conf

driftfile /var/lib/ntp/ntp.drift
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable

server $primary_ntp_server iburst

server $backup_ntp_server
restrict -4 default kod notrap nomodify nopeer noquery
restrict -6 default kod notrap nomodify nopeer noquery
restrict 127.0.0.1
restrict ::1

EOF
service ntp start

#configure bridge networking with eth0 (assumes eth0 has static ip configured)

sed -i -e '/^[[:space:]]*#/!s/eth0/br0/g' -e '/^[[:space:]]*[^#]*iface br0 inet/a \
\tbridge_ports eth0 \
\tbridge_fd 9 \
\tbridge_hello 2 \
\tbridge_maxage 12 \
\tbridge_stp off'  /etc/network/interfaces

invoke-rc.d networking restart

Ubuntu Server 12.04.2 KVM Guest Setup

preparing the template image:
#Setup io scheduler and serial console for virsh
sed -i -r 's/GRUB_CMDLINE_LINUX=".*"/GRUB_CMDLINE_LINUX="elevator=deadline console=ttyS0,38400n8 console=tty0"/g' /etc/default/grub && update-grub

#Setup serial terminal console config
cat <<EOF >/etc/init/ttyS0.conf
# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.

start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]

respawn
exec /sbin/getty -L 38400 ttyS0 vt102
EOF

#Setup fstab mount options to relatime(assumes ext4 file systems)
sed -i -r 's/ext4(\s+)errors/ext4\1relatime,errors/g' /etc/fstab


#!/bin/bash
if [[ $EUID -ne 0 ]]; then
echo "script must be run as root. run with sudo" 2>&1
exit 1
fi
old_name=`hostname`
echo "Current hostname:$old_name"
echo -n "Enter new server name:"
read new_name
echo "$new_name">/etc/hostname
hostname $new_name
sed -i "s/$old_name/$new_name/g" /etc/hosts

#regenerate udev persistent net rules on reboot
echo "Removing /etc/udev/rules.d/70-persistent-net.rules"
rm /etc/udev/rules.d/70-persistent-net.rules

echo "Regenerating ssh server keys"
rm /etc/ssh/ssh_host_*
dpkg-reconfigure openssh-server

echo "*** You should probably change the password and reboot ***"

QT5 on xUbuntu 12.04.2 LTS

The latest version of xVideoServiceThief (2.5) switched to using the QT5 library.

To get it to work, I needed to setup QT5 on a xUbuntu 12.04.2 LTS which I did by running the following commands:

sudo apt-get install python-software-properties && \
sudo apt-add-repository ppa:canonical-qt5-edgers/qt5-proper && \
sudo apt-get update && \
sudo apt-get install libqt5gui5 libqt5webkit5 libqt5script5

Let me know in the comments if this helped you or if there were any issues.

Cloudstack 4.1 on Ubuntu Server

My objective was to setup a Cloudstack 4.1 management node which will also server an NFS server for both primary and secondary storage.

The series of commands below were run on an Ubuntu Server 12.04.2(precise) system. During installation of the operating system, only the OpenSSH server was enabled in the task selection screen. I also made sure to name the server with a fully qualified domain name i.e. cloudstack.henyo.com.

#setup cloudstack source

echo "deb http://cloudstack.apt-get.eu/ubuntu precise 4.1" > /etc/apt/sources.list.d/cloudstack.list

#setup percona source

cat <<EOF >/etc/apt/sources.list.d/percona.list

deb http://repo.percona.com/apt precise main

deb-src http://repo.percona.com/apt precise main

EOF

#install the cloudstack apt-key

wget -O - http://cloudstack.apt-get.eu/release.asc|apt-key add -

#install stuff
apt-get update && \
apt-get install -y --force-yes openntpd nfs-kernel-server cloudstack-management percona-server-server-5.5 percona-server-client-5.5

cat <<EOF >/etc/mysql/conf.d/cloudstack.cnf

[mysqld]

innodb_rollback_on_timeout=1

innodb_lock_wait_timeout=600

max_connections=350

log-bin=mysql-bin

binlog-format = 'ROW'

EOF

service mysql restart

#setup nfs

mkdir -p /export/primary /export/secondary /var/primary /var/secondary

cat <<EOF >>/etc/fstab

/var/primary    /export/primary   none    bind  0  0

/var/secondary  /export/secondary none    bind  0  0

EOF

mount --bind /var/primary/ /export/primary/

mount --bind /var/secondary/ /export/secondary/

echo "/export         *(rw,async,no_root_squash,no_subtree_check)" >> /etc/exports

exportfs -a

service nfs-kernel-server restart

#setup cloudstack database

cloudstack-setup-databases cloud:test@localhost --deploy-as=root:root

#setup management server

echo 'Defaults:cloud !requiretty' >> /etc/sudoers.d/cloudstack

cloudstack-setup-management

reboot

I hope you found the post useful. You can subscribe via email or subscribe via a feed reader to get relevant updates from this blog. Have a nice day.

iphone 5 plan comparison

iphone 5 plan comparison from globe and smart

I took some time to dissect each iphone plan from both globe and smart.

The spreadsheet below compare the iphone 5 - 16GB plans on unlimited data.



The cheapest plan for the iphone 5 16GB comes from smart but the difference is really not that much especially if you look at the monthly cost. The smart plan also provides a bit more free all texts and minutes. To me, it still boils down to the network where most of your contacts are.



The iphone 5 16GB unit might not meet your storage needs so for an additional 200 pesos per month, you can avail of the iphone 5 32GB. Here, globe takes the lead by a measly 1 peso per month. But in my opinion, smart provides a lot more value in the form of freebies.

I hope you found the post useful. You can subscribe via email or subscribe via a feed reader to get relevant updates from this blog. Have a nice day.