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Below is the result of half an hour of shell-scripting and modifications by Dirk Ruediger. The code was written for my specific environment, but was found usefull by at least two other vserver users.
The resulting code is supposed to convert the legacy configuration files (.conf and .sh files in /etc/vservers) to the new directory layout as described in detail on [The Great Flower Page].
The changes by Dirk consist of being able to handle multiple network devices and setting the flag /apps/init/mark to "default" so that the vserver is started via /etc/init.d/vserver-default (under debain at least ;-))
The full script:
#!/bin/bash
###########
do_usage() {
echo "Usage: $0 [NAME]"
echo
echo "Where NAME is the name of the Linux-VServer"
echo " More info on the directory layout can be found at the 'flower page'"
echo " http://www.nongnu.org/util-vserver/doc/conf/configuration.html"
}
do_parsecfg() {
echo -n "Parsing old configfile"
# Obtain all settings from the Linux-VServer using old configfile
source /etc/vservers/${VSNAME}.conf
echo " [DONE]"
echo
}
do_parsesh() {
echo -n "Parsing old shellscript: "
TYPE=0
SKIP=0
if [ -f ${VSBDIR}/scripts/generic.sh ]; then
rm ${VSBDIR}/scripts/generic.sh
fi
echo "#!/bin/bash" > ${VSBDIR}/scripts/pre-start
# echo "source ${VSBDIR}/scripts/generic.sh" >> ${VSBDIR}/scripts/pre-start
echo >> ${VSBDIR}/scripts/pre-start
echo "#!/bin/bash" > ${VSBDIR}/scripts/post-start
# echo "source ${VSBDIR}/scripts/generic.sh" >> ${VSBDIR}/scripts/post-start
echo >> ${VSBDIR}/scripts/post-start
echo "#!/bin/bash" > ${VSBDIR}/scripts/pre-stop
# echo "source ${VSBDIR}/scripts/generic.sh" >> ${VSBDIR}/scripts/pre-stop
echo >> ${VSBDIR}/scripts/pre-stop
echo "#!/bin/bash" > ${VSBDIR}/scripts/post-stop
# echo "source ${VSBDIR}/scripts/generic.sh" >> ${VSBDIR}/scripts/post-stop
echo >> ${VSBDIR}/scripts/post-stop
if [ -f /etc/vservers/$VSNAME.sh ]
then
while read SHELLSCRIPT ; do
case $SHELLSCRIPT in
pre-sta*)
echo -n " pre-start"
TYPE=1
SKIP=1
;;
post-sta*)
echo -n " post-start"
TYPE=2
SKIP=1
;;
pre-sto*)
echo -n " pre-stop"
TYPE=3
SKIP=1
;;
post-sto*)
echo -n " post-stop"
TYPE=4
SKIP=1
;;
"case $1 in")
SKIP=1
;;
"esac")
SKIP=1
;;
";;")
SKIP=1
;;
esac
if [ "${SKIP}" != "1" ]; then
case $TYPE in
0)
echo $SHELLSCRIPT >> ${VSBDIR}/scripts/generic.sh
;;
1)
echo $SHELLSCRIPT >> ${VSBDIR}/scripts/pre-start
;;
2)
echo $SHELLSCRIPT >> ${VSBDIR}/scripts/post-start
;;
3)
echo $SHELLSCRIPT >> ${VSBDIR}/scripts/pre-stop
;;
4)
echo $SHELLSCRIPT >> ${VSBDIR}/scripts/post-stop
;;
esac
else
SKIP=0
fi
done < /etc/vservers/$VSNAME.sh
fi
echo " [DONE]"
echo
}
do_gencfgdir() {
echo "Creating new configdirectory"
# Create new vserver configuration directories
# and create some sane defaults
# - like `vserver [NAME] build -m skeleton` would do
mkdir -p ${VSBDIR}/apps/init
mkdir -p ${VSBDIR}/interfaces/0/
mkdir -p ${VSBDIR}/uts
mkdir -p ${VSBDIR}/scripts
ln -s /var/run/vservers/${VSNAME} ${VSBDIR}/run
ln -s /etc/vservers/.defaults/run.rev ${VSBDIR}/run.rev
ln -s /etc/vservers/.defaults/vdirbase/${VSNAME} ${VSBDIR}/vdir
#
# Create the new configuration based on the [NAME].conf file
#
# Fill the System capabilities file (2.6 kernel)
echo -n " * Setting Bcapabilities:"
if [ -f ${VSBDIR}/bcapabilities ]; then
rm -f ${VSBDIR}/bcapabilities
fi
for CAPA in ${S_CAPS}; do
echo -n " ${CAPA}"
echo "${CAPA}" >> ${VSBDIR}/bcapabilities
done
echo " [OK]"
# Fill the System capabilities file (2.4 kernel)
# echo -n " * Setting capabilities:"
# if [ -f ${VSBDIR}/capabilities ]; then
# rm -f ${VSBDIR}/capabilities
# fi
# for CAPA in ${S_CAPS}; do
# echo -n " ${CAPA}"
# echo "${CAPA}" >> ${VSBDIR}/capabilities
# done
# echo " [OK]"
# Fill the Context capabilities file
# echo -n " * Setting Ccapabilities:"
# if [ -f ${VSBDIR}/ccapabilities ]; then
# rm -f ${VSBDIR}/ccapabilities
# fi
# for CAPA in ${S_CAPS}; do
# echo -n " ${CAPA}"
# echo "${CAPA}" >> ${VSBDIR}/ccapabilities
# done
# echo " [OK]"
# Set the flags for this Linux-VServer
echo -n " * Setting flags:"
if [ -f ${VSBDIR}/flags ]; then
rm -f ${VSBDIR}/flags
fi
if [ "${S_FLAGS}" == "" ]; then
S_FLAGS="lock nproc"
fi
for FLAG in ${S_FLAGS}; do
echo -n " ${FLAG}"
echo "${FLAG}" >> ${VSBDIR}/flags
done
echo " [OK]"
# Setup the fstab file (Using sane defaults)
# - There was no way to specify this in the
# old style config file
echo -n " * Setting the fstab(s):"
echo "none /proc proc defaults 0 0" > ${VSBDIR}/fstab
echo "none /dev/pts devpts gid=5,mode=620 0 0" >> ${VSBDIR}/fstab
echo "#none /tmp tmpfs size=16m,mode=1777 0 0" >> ${VSBDIR}/fstab
# Define, but don't use, a local fstab entry
# echo "# The fstab file for the vserver." > ${VSBDIR}/fstab.local
# echo "#" >> ${VSBDIR}/fstab.local
# echo "# In opposite to the normal 'fstab' file, the mounting happens in the local network context." >> ${VSBDIR}/fstab.local
# echo "# Currently there is no way to mix entries of both files; 'fstab' will be always processed" >> ${VSBDIR}/fstab.local
# echo "# before 'fstab.local'." >> ${VSBDIR}/fstab.local
# echo " [OK]"
# Init based configuration
# echo -n " * Setting the INIT configuration:"
# if [ "${S_START}" != "" ]; then
# echo "${S_START}" > ${VSBDIR}/apps/init/cmd.start
# fi
# if [ "${S_STOP}" != "" ]; then
# echo "${S_STOP}" > ${VSBDIR}/apps/init/cmd.stop
# fi
echo "plain" > ${VSBDIR}/apps/init/style
echo "default" > ${VSBDIR}/apps/init/mark
echo " [OK]"
# Set the vserver name / context
echo -n " * Setting Linux VServer specifics (contextid, etc):"
echo "${VSNAME}" > ${VSBDIR}/name
echo "${S_CONTEXT}" > ${VSBDIR}/context
# Change the `uname` output for the Linux-VServer
echo "${S_HOSTNAME}" > ${VSBDIR}/uts/nodename
echo "`uname -r | cut -d - -f 1`" > ${VSBDIR}/uts/release
echo " [OK]"
# IP Configuration
echo " * Setting up network configuration..."
NETID=0
for VSNET in ${IPROOT}; do
echo " - Interface ${NETID} -"
VSNETDEV="`echo ${VSNET} | cut -d : -f 1`"
VSNETADDR="`echo ${VSNET} | cut -d : -f 2 | cut -d / -f 1`"
VSNETMASK="`echo ${VSNET} | cut -d : -f 2 | cut -d / -f 2`"
mkdir -p ${VSBDIR}/interfaces/${NETID}/
if [ "${VSNETBCAST}" != "" ]; then
echo " Broadcast: ${VSNETBCAST}"
echo "${VSNETBCAST}" > ${VSBDIR}/interfaces/${NETID}/bcast
fi
if [ "${VSNETDEV}" != "" ]; then
echo " Device: ${VSNETDEV}"
echo "${VSNETDEV}" > ${VSBDIR}/interfaces/${NETID}/dev
fi
# touch ${VSBDIR}/interfaces/${NETID}/disabled
if [ "${VSNETADDR}" != "" ]; then
echo " Address: ${VSNETADDR}"
echo "${VSNETADDR}" > ${VSBDIR}/interfaces/${NETID}/ip
fi
if [ "${VSNETMASK}" != "" ]; then
echo " Netmask: ${VSNETMASK}"
echo "${VSNETMASK}" > ${VSBDIR}/interfaces/${NETID}/mask
fi
echo " Alias name: ${NETID}${VSNAME}"
echo "${NETID}${VSNAME}" > ${VSBDIR}/interfaces/${NETID}/name
# touch ${VSBDIR}/interfaces/${NETID}/nodev
# echo "${IPROOTBCAST}" > ${VSBDIR}/interfaces/${NETID}/prefix
# echo "${IPROOTBCAST}" > ${VSBDIR}/interfaces/${NETID}/scope
let NETID++
done
echo
}
do_updatevserver() {
rm -rf ${VSROOT}/${VSNAME}/dev \
${VSROOT}/${VSNAME}/proc
mkdir -p ${VSROOT}/${VSNAME}/proc
mkdir -p ${VSROOT}/${VSNAME}/dev/pts
mknod -m 666 ${VSROOT}/${VSNAME}/dev/full c 1 7
mknod -m 666 ${VSROOT}/${VSNAME}/dev/null c 1 3
mknod -m 666 ${VSROOT}/${VSNAME}/dev/ptmx c 5 2
mknod -m 644 ${VSROOT}/${VSNAME}/dev/random c 1 8
mknod -m 666 ${VSROOT}/${VSNAME}/dev/tty c 5 0
mknod -m 644 ${VSROOT}/${VSNAME}/dev/urandom c 1 9
mknod -m 666 ${VSROOT}/${VSNAME}/dev/zero c 1 5
}
### Main
if [ "$1" == "" ]; then
do_usage
exit 1
fi
### Settings
VSNAME=$1
VSROOT=/var/lib/vservers
VSBDIR=/etc/vservers/${VSNAME}
### Clean up if wanted
if [ "$2" == "-f" -a -d ${VSBDIR} ]; then
echo -n "Forcing removal of previous configuration directory: ${VSBDIR}"
rm -rf ${VSBDIR}
echo " [DONE]"
echo
fi
if [ -f /etc/vservers/${VSNAME}.conf -a -d /var/lib/vservers/${VSNAME} ]; then
do_parsecfg ;# Read the [NAME].conf file
do_gencfgdir ;# Convert the [NAME].conf file
do_parsesh ;# Convert the [NAME].sh file
do_updatevserver;# Convert proc/dev tree
else
echo "VServer configuration not found!"
exit 1
fi