Lab46 Wiki

• This page is for the HPC0 project 0x1 System Status Documentation.

• In order to start you have to login to the vmserver to create your vm
• Once logged in go to /etc/xen
• Run the following command (changing $HOSTNAME to whatever you want to call it)

 # xen-create-image --hostname $HOSTNAME --pygrub --dist wheezy 

• It takes a while (even longer if you forgot to set up the mirror)
• If you want to see what xen does while creating your image
• Go to /var/log/xen-tools and run

 tail -f $HOSTNAME.log 

• After putting in the default password now we have to change DNS and DHCP
• DNS is in /var/named/master, you have to edit both files
• In the 10.80.3 file I changed

 102  IN  PTR  vm02.projects.lan. 

• to

 102  IN  PTR  vm-102.projects.lan. 

• and in the projects.lan I changed

 vm02  IN  A 10.80.3.102 

• to

 vm-102  IN  A 10.80.3.102 

• Now onto DCHP, this is the file /etc/dhcpd.conf
• Under my own subgroup I added a few lines

 host vm102.projects.lan {
    hardware ethernet $ETHERNET;
    fixed-address vm-102.projects.lan;
 }

• If your to lazy (like me) to boot up your VM just to type ifconfig
• On the vmserver open up the file /etc/xen/$HOSTNAME.cfg and look for the networking subgroup
• After you type everything correctly run

 # confupdate dns
 # confupdate dhcp

• I did the exact same thing as VM-102 just changing $HOSTNAME from VM-102 to VM-103

• Im going to start at bkfirst so that will be my “Starting Point”

 ssh-keygen 

• You can run this as root or not, just remember where you did it
• At the starting point, after you run ssh-keygen, in .ssh folder under your user
• cp the .pub file to a different name named $FILE
• scp $FILE to both vms
• now append this file to authorized_keys on both vms

root@vm-###:~/.ssh# cat $FILE >> authorized_keys 

• Script itself isn't very long but it gets the job done

#!/bin/bash

VM1='vm-102.projects.lan'
VM2='vm-103.projects.lan'

echo "VM-102"
echo "Uptime"
ssh root@$VM1 "uptime"
echo -e "\n"
echo "Free Space"
ssh root@$VM1 "df -h | grep rootfs"
echo -e "\n"

echo "VM-103"
echo "Uptime"
ssh root@$VM2 "uptime"
echo -e "\n"
echo "Free Space"
ssh root@$VM2 "df -h | grep rootfs"