mirror of
https://github.com/openvswitch/ovs
synced 2025-10-25 15:07:05 +00:00
19cbf2b8a4
Currently, when we upgrade openvswitch packages, we do a restart of userspace daemons automatically. This does not replace the kernel module. But almost everytime, we want to use the new kernel module that comes with the new version. This means that we need to manually do a "force-reload-kmod". This step, reloads the kernel module and also restarts the userspace daemons. This gives us a total of two restarts of userspace daemons. This is quite expensive in a hypervisor with hundreds of VMs sending real traffic. This also hurts the controller as it gets two reconnections in a short amount of time. With this patch, during a package upgrade, if the kernel module on disk is different than the one that is loaded, we will automatically do a force-reload-kmod while openvswitch-switch is installed. If not, we will just do a "restart" like before. One can install the kernel package first and then install the userspace packages in 2 separate steps to enforce a single 'force-reload-kmod'. If anyone wants to just restart the userspace package instead of force-reload-kmod, they can set the value of OVS_FORCE_RELOAD_KMOD=no while installing the package. Ex: OVS_FORCE_RELOAD_KMOD=no dpkg -i openvswitch-switch* Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
237 lines
6.8 KiB
Plaintext
237 lines
6.8 KiB
Plaintext
# This is a shell function library sourced by some Open vSwitch scripts.
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# It is not intended to be invoked on its own.
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# Copyright (C) 2009, 2010, 2011, 2012 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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## ----------------- ##
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## configure options ##
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## ----------------- ##
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# All of these should be substituted by the Makefile at build time.
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logdir=${OVS_LOGDIR-'@LOGDIR@'} # /var/log/openvswitch
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rundir=${OVS_RUNDIR-'@RUNDIR@'} # /var/run/openvswitch
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sysconfdir=${OVS_SYSCONFDIR-'@sysconfdir@'} # /etc
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etcdir=$sysconfdir/openvswitch # /etc/openvswitch
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datadir=${OVS_PKGDATADIR-'@pkgdatadir@'} # /usr/share/openvswitch
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bindir=${OVS_BINDIR-'@bindir@'} # /usr/bin
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sbindir=${OVS_SBINDIR-'@sbindir@'} # /usr/sbin
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# /etc/openvswitch or /var/lib/openvswitch
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if test X"$OVS_DBDIR" != X; then
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dbdir=$OVS_DBDIR
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elif test X"$OVS_SYSCONFDIR" != X; then
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dbdir=$OVS_SYSCONFDIR/openvswitch
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else
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dbdir='@DBDIR@'
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fi
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ovs_ctl_log () {
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echo "$@" >> "${logdir}/ovs-ctl.log"
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}
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ovs_ctl () {
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case "$@" in
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*"=strace"*)
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# In case of running the daemon with strace, piping the o/p causes
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# the script to block (strace probably does not close the inherited
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# pipe). So, do not log the o/p to ovs-ctl.log.
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"${datadir}/scripts/ovs-ctl" "$@"
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;;
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*)
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echo "`date -u`:$@" >> "${logdir}/ovs-ctl.log"
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"${datadir}/scripts/ovs-ctl" "$@" 2>&1 | tee -a "${logdir}/ovs-ctl.log"
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;;
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esac
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}
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VERSION='@VERSION@'
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DAEMON_CWD=/
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LC_ALL=C; export LC_ALL
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## ------------- ##
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## LSB functions ##
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## ------------- ##
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# Use the system's own implementations if it has any.
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if test -e /etc/init.d/functions; then
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. /etc/init.d/functions
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elif test -e /etc/rc.d/init.d/functions; then
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. /etc/rc.d/init.d/functions
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elif test -e /lib/lsb/init-functions; then
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. /lib/lsb/init-functions
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fi
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# Implement missing functions (e.g. OpenSUSE lacks 'action').
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if type log_success_msg >/dev/null 2>&1; then :; else
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log_success_msg () {
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printf '%s.\n' "$*"
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}
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fi
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if type log_failure_msg >/dev/null 2>&1; then :; else
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log_failure_msg () {
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printf '%s ... failed!\n' "$*"
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}
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fi
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if type log_warning_msg >/dev/null 2>&1; then :; else
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log_warning_msg () {
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printf '%s ... (warning).\n' "$*"
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}
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fi
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if type action >/dev/null 2>&1; then :; else
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action () {
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STRING=$1
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shift
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"$@"
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rc=$?
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if test $rc = 0; then
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log_success_msg "$STRING"
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else
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log_failure_msg "$STRING"
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fi
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return $rc
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}
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fi
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## ------- ##
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## Daemons ##
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## ------- ##
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pid_exists () {
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# This is better than "kill -0" because it doesn't require permission to
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# send a signal (so daemon_status in particular works as non-root).
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test -d /proc/"$1"
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}
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start_daemon () {
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priority=$1
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wrapper=$2
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shift; shift
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daemon=$1
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strace=""
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# drop core files in a sensible place
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test -d "$DAEMON_CWD" || install -d -m 755 -o root -g root "$DAEMON_CWD"
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set "$@" --no-chdir
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cd "$DAEMON_CWD"
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# log file
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test -d "$logdir" || install -d -m 755 -o root -g root "$logdir"
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set "$@" --log-file="$logdir/$daemon.log"
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# pidfile and monitoring
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test -d "$rundir" || install -d -m 755 -o root -g root "$rundir"
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set "$@" --pidfile="$rundir/$daemon.pid"
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set "$@" --detach --monitor
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# wrapper
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case $wrapper in
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valgrind)
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if (valgrind --version) > /dev/null 2>&1; then
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set valgrind -q --leak-check=full --time-stamp=yes \
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--log-file="$logdir/$daemon.valgrind.log.%p" "$@"
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else
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log_failure_msg "valgrind not installed, running $daemon without it"
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fi
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;;
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strace)
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if (strace -V) > /dev/null 2>&1; then
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strace="strace -tt -T -s 256 -ff"
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if (strace -DV) > /dev/null 2>&1; then
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# Has the -D option.
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set $strace -D -o "$logdir/$daemon.strace.log" "$@"
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strace=""
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fi
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else
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log_failure_msg "strace not installed, running $daemon without it"
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fi
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;;
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glibc)
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set env MALLOC_CHECK_=2 MALLOC_PERTURB_=165 "$@"
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;;
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'')
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;;
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*)
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log_failure_msg "unknown wrapper $wrapper, running $daemon without it"
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;;
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esac
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# priority
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if test X"$priority" != X; then
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set nice -n "$priority" "$@"
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fi
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action "Starting $daemon" "$@"
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if test X"$strace" != X; then
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# Strace doesn't have the -D option so we attach after the fact.
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setsid $strace -o "$logdir/$daemon.strace.log" \
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-p `cat $rundir/$daemon.pid` > /dev/null 2>&1 &
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fi
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}
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stop_daemon () {
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if test -e "$rundir/$1.pid"; then
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if pid=`cat "$rundir/$1.pid"`; then
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for action in TERM .1 .25 .65 1 1 1 1 KILL 1 1 1 2 10 15 30 FAIL; do
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if pid_exists "$pid" >/dev/null 2>&1; then :; else
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return 0
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fi
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case $action in
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TERM)
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action "Killing $1 ($pid)" kill $pid
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;;
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KILL)
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action "Killing $1 ($pid) with SIGKILL" kill -9 $pid
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;;
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FAIL)
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log_failure_msg "Killing $1 ($pid) failed"
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return 1
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;;
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*)
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sleep $action
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;;
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esac
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done
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fi
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fi
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log_success_msg "$1 is not running"
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}
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daemon_status () {
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pidfile=$rundir/$1.pid
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if test -e "$pidfile"; then
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if pid=`cat "$pidfile"`; then
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if pid_exists "$pid"; then
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echo "$1 is running with pid $pid"
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return 0
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else
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echo "Pidfile for $1 ($pidfile) is stale"
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fi
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else
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echo "Pidfile for $1 ($pidfile) exists but cannot be read"
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fi
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else
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echo "$1 is not running"
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fi
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return 1
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}
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daemon_is_running () {
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pidfile=$rundir/$1.pid
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test -e "$pidfile" && pid=`cat "$pidfile"` && pid_exists "$pid"
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} >/dev/null 2>&1
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