October 2010
Ubuntu's Upstart parallellizes the startup sequence. There's a Getting-Started, a FAQ and a Wiki. Below two upstart jobs that form my first succesful try:
This is /etc/init/lwp-rename-host
:
# lwp-rename-host - Rename the host if the DNS says it's not properly named # # Probe DNS and DHCP for the hostname of the system based on its IP number # then alter the hostname accordingly # This emits the signal lwp-rename-host on success description "Rename the host to DNS-/DHCP-provided name" start on net-device-up task env DEFAULTFILE=/etc/default/lwp-rename-host pre-start script if [ -f "$DEFAULTFILE" ] ; then . ${DEFAULTFILE} fi end script script if ! [ "x$RENAME_HOST" = "xno" ] ; then if wai -f ; then # 'wai' fixes the hostname if it can initctl emit lwp-host-renamed echo "# This line added automatically by lwp-rename-host upon success" >> ${DEFAULTFILE} echo "RENAME_HOST=no" >> ${DEFAULTFILE} fi fi end script
And this is /etc/init/lwp-fix-postfix-mailname.conf
, which is started if init send the 'signal' lwp-host-renamed
:
# lwp-fix-postfix-mailname - Fix the mailname when the system's hostname changes # # The mail config contains the system's name in several places # This program changes them when the hostname changes # description "Fix the mailname when the hostname changes" start on lwp-host-renamed task script HOSTNAME=$(hostname) FQDN=$(hostname --fqdn) DOMAIN=$(hostname --domain) echo ${FQDN} > /etc/mailname postconf -e myorigin="/etc/mailname" myhostname="${HOSTNAME}" mydomain="${DOMAIN}" mydestination="localhost, localhost.${DOMAIN}, ${HOSTNAME}, ${FQDN}" end script