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mk-conserver-xen.sh
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mk-conserver-xen.sh
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#!/bin/sh
#
# mk-conserver-xen.sh
#
# Install this on the dom0 host in {/usr/pkg}/etc/xen/scripts/mk-conserver-xen
#
# Run this script by doing "/etc/rc.d/conserver8 reload"
#
# Follow the instructions in the rest of this comment to complete the
# configuration of both conserver and Xen.
#
# edit {/usr/pkg}/etc/conserver.cf to add (replacing XENHOST with $(hostname)):
#
# #
# # Xen break into ddb
# #
# break 4 { string "+++++"; }
#
# # if only handling Xen consoles then add a dummy console to
# # allow for starting conserver when no Xen domains are (yet)
# # running.
# #
# console dummy-xentastic {
# type exec;
# options ondemand;
# exec /usr/bin/true;
# }
#
# # this "#include" line is not a comment!
# # (iff it is preceded by a blank line)
#
# #include /usr/pkg/etc/xen/conserver.xen
#
# NOTICE: watch out for unwanted /usr/pkg above!
#
# put the next section in /etc/rc.conf.d/conserver:
#
# start_precmd=conserver_precmd
# reload_precmd=conserver_precmd
#
# conserver_precmd() {
# XEN_SYSCONFDIR=$(/usr/sbin/pkg_info -Q PKG_SYSCONFDIR xentools\* | sed -n 1p)
# XEN_PREFIX=$(/usr/sbin/pkg_info -Q PREFIX xentools\* | sed -n 1p)
# xenstored_pid=$(check_pidfile /var/run/xenstored.pid ${XEN_PREFIX}/sbin/xenstored)
# if [ -n "${xenstored_pid}" ]; then
# ${XEN_SYSCONFDIR}/xen/scripts/mk-conserver-xen
# #
# # n.b.: if domU changes are frequent between boots then the config file
# # will not reflect how it will look after a dom0 reboot, so clear it to
# # avoid connecting the wrong consoles to the wrong ptys:
# #
# # else
# # # at least one "console" entry must exist at all times
# # #
# # cat > ${XEN_SYSCONFDIR}/xen/conserver.xen <<- _EOH_
# # console empty-${hostname} {
# # ${tab}type exec;
# # ${tab}options ondemand;
# # ${tab}exec /usr/bin/true;
# # }
# # _EOH_
# fi
# }
#
# edit /etc/rc.d/xendomains to add "conserver" (and "sshd") to the "REQUIRE:"
# line, like this:
#
# REQUIRE: xencommons conserver sshd
#
# put the next section in /etc/rc.conf.d/xendomains:
#
# start_postcmd=xendomains_postcmd
#
# xendomains_postcmd() {
# XEN_SYSCONFDIR=$(/usr/sbin/pkg_info -Q PKG_SYSCONFDIR xentools\* | sed -n 1p)
# ${XEN_SYSCONFDIR}/xen/scripts/mk-conserver-xen reload
# }
#
# Now you can also run "/etc/rc.d/conserver reload" after you manually start a
# new domU (or shut one down).
#
#ident "@(#):mk-conserver-xen.sh,v 1.9 2019/04/07 21:00:53 woods Exp"
export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/pkg/bin:/usr/pkg/sbin
XEN_SYSCONFDIR=$(/usr/sbin/pkg_info -Q PKG_SYSCONFDIR xentools\* | sed -n 1p)
XEN_PREFIX=$(/usr/sbin/pkg_info -Q PREFIX xentools\* | sed -n 1p)
tab=$(printf "\t")
have_domUs=false
hostname=$(hostname)
TMPFILE=$(mktemp "${XEN_SYSCONFDIR}/xen/conserver.xen.XXXXXXXX")
CONSERVER_XEN="${XEN_SYSCONFDIR}/xen/conserver.xen"
###echo $0: dom0=${hostname}: rebuilding ${CONSERVER_XEN}
# xxx could/should there be an exit trap to clean up $TMPFILE???
echo "# DO NOT MODIFY -- cretated entirely by ${0}" > ${TMPFILE}
for domid in $(xenstore-list /local/domain) ; do
if [ ${domid} = 0 ]; then
# xenstored knows nothing about our own dom0 console
continue
fi
have_domUs=true
domnm=$(xenstore-read /local/domain/${domid}/name)
domtty=$(xenstore-read /local/domain/${domid}/console/tty 2>/dev/null)
domstty=$(xenstore-read /local/domain/${domid}/serial/0/tty 2>/dev/null)
if [ -z "${domtty}" -a -z "${domstty}" ]; then
echo ERROR: ${domnm} has no console or serial tty 1>&2
echo "#console ${domnm} {}"
continue;
fi
if [ -n "${domtty}" ]; then
# if there is a serial tty, it should have the default (simple)
# name, so append "-cons" to this one if domstty is set
cat <<- _EOH_
console ${domnm}${domstty:+-cons} {
${tab}type device;
${tab}device ${domtty};
${tab}baud 115200;
${tab}parity none;
}
_EOH_
fi
if [ -n "${domstty}" ]; then
cat <<- _EOH_
console ${domnm} {
${tab}type device;
${tab}device ${domstty};
${tab}baud 115200;
${tab}parity none;
}
_EOH_
fi
done >> ${TMPFILE}
if ! ${have_domUs}; then
# at least one entry must exist at all times
#
cat <<- _EOH_
console dummy-${hostname} {
${tab}type exec;
}
_EOH_
fi
rc=$?
if [ ${rc} -ne 0 ]; then
echo $0: failed to generate new conserver.xen 1>&2
rm ${TMPFILE}
exit ${rc}
fi
if cmp ${TMPFILE} ${CONSERVER_XEN} >/dev/null 2>&1; then
echo ${CONSERVER_XEN}: no change 1>&2
rm ${TMPFILE}
exit 0
fi
mv ${TMPFILE} ${CONSERVER_XEN}
if [ "${1}" = "reload" ]; then
/etc/rc.d/conserver reload
fi