LINUX64 - Linux Server based on CentOS 5 (64bit) - Implementation Design

Base Class

LINUX64 is a base class created from a CentOS? 5 installation on hardware

Class Volumes

LINUX64 consists of the following class volumes:

• boot volume, 2.5 GB size, mounted as "/", writable, instantiable.

Packages

Contents of the release directory:

Exported appliance images:

• LINUX64-1.0.0.tar.bz2

Source RPMs:

• LINUX64-1.0.0-1.x86_64.rpm - Installs appliance-specific files to the boot image

Tests (see the test plan CatGenericLinux64Tp):

• linux64-tst-app.tar.bz2 - test application

Re-creating the Appliance

To recreate the LINUX64 appliance:

1. install CentOS? 5 (64 bit) on native hardware - requires all 7 CDs - The following is a list of instructions for selecting the packages that were installed:
   • Desktop - unselect everything
   • Applications
     • select Editors
     • select Text-based Internet and only select lynx within the optional packages
   • Development
     • Select Development libraries and select ALL optional packages
     • Select Development Tools and unselect the following: frysk, gcc-fortran, dogtail
   • Servers
     • Select Mail Server and include ONLY the following optional packages: cyrus-sasl, exim, sendmail
     • Select Legacy Network and include ONLY the following optional packages: xinetd
     • Select FTP and include NO optional packages
     • Select DNS and include NO optional packages
     • Select Server Configuration Tools and include ONLY the following package: system-config-security-level
   • Base
     • The default packages are fine
   • System Tools - include ONLY the following optional packages: gnutls-utils, mt-st, samba-client, screen
2. After the installation is complete, login the the server and do

      cp -a /{bin,boot,dev,etc,home,lib,lib64,media,opt,root,sbin,srv,usr,var} /mnt/
      mkdir /mnt/{mnt,proc,sys,tmp}
      chmod 755 /mnt/mnt /mnt/sys/
      chmod 555 /mnt/proc/
      chmod 1777 /mnt/tmp/
      

3. install xen DomU kernel and modules. The actual package versions will depend on the applogic version. The example below is for applogic 2.2, use the rpms that come in the applogic install directory for the current release

      rpm --root /mnt -Uv  xen-ukrnl-3.2-1.x86_64.rpm  xen-umods-3.2-1.x86_64.rpm
      depmod -a -b /mnt 2.6.18-xenU
      

4. Update all installed packages with the latest versions

      yum update --all  --installroot /mnt
      

5. Cleanup

      chroot /mnt rpm -v --rebuilddb
      rm -f /mnt/root/anaconda-ks.cfg /mnt/root/install.log /mnt/root/install.log.syslog /mnt/root/.lesshst
      rm -rf /mnt/boot/grub
      find /mnt/var/log/ -type f -exec rm -f {} \;
      rm -f /mnt/etc/sysconfig/network-scripts/ifcfg-eth*
      rm -f /mnt/etc/sysconfig/network-scripts/route-eth*
      echo -n "" > /mnt/etc/resolv.conf
      echo "127.0.0.1 localhost.localdomain localhost" > /mnt/etc/hosts
      touch /mnt/etc/applogic_network.conf
      

6. Copy & modify files
   • install the attached rpm file to install appliance-customization files

      rpm -root /mnt -i linux64-1.0.0-1.x86_64.rpm 

   • install /boot/initrd-2.6.18-xenU.img (copy from a dom0 server in a grid from the current version)
   • modify the root password chroot /mnt passwd --stdin root < /proc/sys/kernel/random/uuid
   • ensure that selinux is disabled - edit /etc/sysconfig/selinux
7. Setup init scripts

      chroot /mnt chkconfig --add applogic_appliance
      chroot /mnt chkconfig --add applogic_cca
      chroot /mnt chkconfig --add applogic_network
      chroot /mnt chkconfig --add applogic_vma
      

8. Disable unnecessary services

      chkconfig kudzu off
      chkconfig bluetooth off
      chkconfig cpuspeed off
      chkconfig restorecond off
      chkconfig mcstrans off
      chkconfig mdmonitor off
      chkconfig hidd off
      chkconfig pcscd off
      chkconfig smartd off
      chkconfig firstboot off
      

9. Configure log rotation
   • edit /mnt/etc/logrotate.conf and set 'size 512k' and ensure rotate is set to 4
10. Create images

       dd if=/dev/zero of=/tmp/LINUX64.boot.img bs=1k count=2560k
       mkfs -t ext3 -F /tmp/LINUX64.boot.img
       mount -o loop /tmp/LINUX64.boot.img /media/
       mv /mnt/* /media/
       umount /media/
       gzip /tmp/LINUX64.boot.img
       

11. Create an application in EDT named myapp
    • add a new singleton
    • Edit:
      • name: LUX64
      • Category: Generic
      • Description: Linux Server based on CentOS? 5 (64bit) (version 0.0.1)
      • kernel + initrd: /boot/vmlinuz-2.6.18-xenU, /boot/initrd-2.6.18-xenU.img
      • terminals: add mon out terminal (proto cce, not mendatory)
      • volumes
        • boot, instantiable, mount on /dev/hda1, 2.5G, fs: ext3, boot
      • resources: see data sheet
12. export application

       app export myapp myapp
       

13. upload new images to the vol directory of your exported application

       # Example:
       sftp -o 'StrictHostKeyChecking no' -o "IdentitiesOnly yes"  -o "IdentityFile ~/.ssh/applogic" root@ev1.3tera.net:/_impex/myapp/vol
       # on the command prompt
       put LINUX64.boot.img.gz
       

14. import the application with the new volumes

       app import myapp2 myapp
       

15. Move to catalog

       class move  myapp2:LINUX64 /user:LINUX64
       

Theory of Operation

None.

Configuration

None.

Log Files

None.