Agile testbed/Cloud/Installation notes

This page contains notes on the installation of the agile testbed cloud.

Base install

• Install CentOS 5 bare-bones
• Setup LDAP authentication (see this guide)
  • add ldap to /etc/nsswitch.conf's passwd, shadow and group entries
  • configure /etc/ldap.conf according to this
  • make sure the DutchGrid CA certificate is in /etc/openldap/cacerts/16da7552.0 (from rpm or here)
  • update /etc/pam.d/system-auth using command authconfig --enableldap --enableldapauth --update
  • create homedirs for your users as /user/<username> with correct owner, populate authorized_keys
  • disable ssh PasswordAuthentication

Master

• Install and configure OpenNebula
  • add EPEL repository
  • install packages: ruby ruby-devel gcc gcc-c++ make openssl-devel scons flex bison
  • enable Karan Extras repository and install xmlrpc-c: yum install --enablerepo=kbs-CentOS-Testing xmlrpc-c-devel
  • download and install OpenNebula
    • either manually from source, installing a recent sqlite first (according to manual)
    • or use the spec file and patch
    • and create startup script
• Setup dynamic DNS (optional but convenient)
  • install and configure bind
  • create OpenNebula hooks with ddns-update script
• Setup image repository
• Install mkisofs for contextualisation

OpenNebula documentation Building Clouds presentation Virtual Machines working group

Slaves

• Enable Xen (see also Xen on CentOS 5)
  • yum install xen kernel-xen
  • make grub boot Xen kernel by default (change default in /boot/grub/menu.lst), add nosmp to kernel cmdline and reboot
• Allow oneadmin user to execute cloud-related commands using sudo
  • Setup /etc/sudoers (e.g. using visudo)

    Cmnd_Alias CLOUD = /usr/sbin/xm, /usr/sbin/xentop, /usr/sbin/lvs, /usr/sbin/lvcreate, /usr/sbin/lvremove, /bin/dd

    oneadmin ALL = NOPASSWD: CLOUD

  • Disable sudo's requiretty option
  • Add PATH=$PATH:/sbin:/usr/sbin to ~oneadmin/.bashrc so that these commands can be found
• Install ruby from the RubyWorks repository (you really need 1.8.6 or higher)
• Enable passwordless ssh login from master for oneadmin user
• Add to master using onehost there
• Setup networking
  • if multiple interfaces: bridge setup notes (with options netloop nloopbacks=0 in modprobe.conf)