From Grid5000

Insip4all is a little framework, which intends to make an installed 4all environement as site-neutral as possible. It makes insipid the systems.

Contents 1 The cleaning problem 1.1 Deployment effect 1.2 What to clean 2 How it works 2.1 Guess distribution 2.2 Neutral files 2.3 Script execution 3 Usage 3.1 Retrieve it 3.2 Use it

The cleaning problem

Systems becomes site-specific after being deployed.

Deployment effect

When you install an environment on Grid'5000, resulting system becomes site-specific because of:

• Environment's postinstall run
• Configuration generated by DHCP client

For example, after the deployment by kadeploy of a debian4all environment, these files are site specific:

/etc/fstab
/etc/hosts
/etc/hostname
/etc/inittab
/etc/ssh/ssh_host_*
...

What to clean

Insip4all makes the system neutral by:

• Replacing specific files by their neutral version:

echo 'localhost.localdomain' > /etc/hostname

• Removing others specific files, whose corresponding neutral version does not exist:

rm -f /etc/ssh/ssh_host_*

• Executing commands to clean some databases:

updatedb

• Adding files required for next deployment:

touch /fastboot

How it works

insip4all is only a pool of distribution dedicated scripts and neutral configuration.

Guess distribution

First step, insipid guess distribution that runs on.

if [ -f /etc/debian_version ]; then
  DISTRO="debian"
elif [ -f /etc/fedora-release ]; then
  DISTRO="fedora"
else
  DISTRO="unknown"
fi

Neutral files

Then, it copies neutral version of configuration files available for all distribution or for the current one.

# neutral distribution specific files
cp ${CP_OPTS} ${INSIPID_DIR}/${DISTRO}/* /
# neutral generic files (eg. shared among all distributions)
cp ${CP_OPTS} ${INSIPID_DIR}/generic/* /

Script execution

At last, to address special hints like cleaning some databases, insip4all runs a distribution-specific script and a generic cleaning script after that.

# distribution specific cleaning process
${INSIPID_DIR}/${DISTRO}.sh
# cleaning process common to every distribution
${INSIPID_DIR}/generic.sh

Usage

Retrieve it

insip4all is installed on recent 4all images in:

/root/insip4all

You can also retrieve it from SVN repository at InriaGforge:

svn checkout svn://scm.gforge.inria.fr/svn/grid5000/admin/trunk/insip4all

Use it

It is very easy to use it:

cd insip4all/
./insipid.sh

It will automatically guess your distribution, as explained above.