sonic-buildimage/files/scripts/teamd.sh
Nazarii Hnydyn 5b74f5dccf [teamd]: Send USR1/USR2 only to subscribers. (#8856)
To fix teamd signal handling, without which Process 'tlm_teamd' exited unexpectedly
2021-11-05 18:52:25 -07:00

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#!/bin/bash
. /usr/local/bin/asic_status.sh
function debug()
{
/usr/bin/logger $1
/bin/echo `date` "- $1" >> ${DEBUG_LOG}
}
function check_warm_boot()
{
SYSTEM_WARM_START=`$SONIC_DB_CLI STATE_DB hget "WARM_RESTART_ENABLE_TABLE|system" enable`
SERVICE_WARM_START=`$SONIC_DB_CLI STATE_DB hget "WARM_RESTART_ENABLE_TABLE|${SERVICE}" enable`
if [[ x"$SYSTEM_WARM_START" == x"true" ]] || [[ x"$SERVICE_WARM_START" == x"true" ]]; then
WARM_BOOT="true"
else
WARM_BOOT="false"
fi
}
function validate_restore_count()
{
if [[ x"$WARM_BOOT" == x"true" ]]; then
RESTORE_COUNT=`$SONIC_DB_CLI STATE_DB hget "WARM_RESTART_TABLE|${SERVICE}" restore_count`
# We have to make sure db data has not been flushed.
if [[ -z "$RESTORE_COUNT" ]]; then
WARM_BOOT="false"
fi
fi
}
function check_fast_boot ()
{
if [[ $($SONIC_DB_CLI STATE_DB GET "FAST_REBOOT|system") == "1" ]]; then
FAST_BOOT="true"
else
FAST_BOOT="false"
fi
}
start() {
debug "Starting ${SERVICE}$DEV service..."
check_warm_boot
validate_restore_count
check_fast_boot
debug "Warm boot flag: ${SERVICE}$DEV ${WARM_BOOT}."
debug "Fast boot flag: ${SERVICE}$DEV ${Fast_BOOT}."
# On supervisor card, skip starting asic related services here. In wait(),
# wait until the asic is detected by pmon and published via database.
if ! is_chassis_supervisor; then
# start service docker
/usr/bin/${SERVICE}.sh start $DEV
debug "Started ${SERVICE}$DEV service..."
fi
}
wait() {
# On supervisor card, wait for asic to be online before starting the docker.
if is_chassis_supervisor; then
check_asic_status
ASIC_STATUS=$?
# start service docker
if [[ $ASIC_STATUS == 0 ]]; then
/usr/bin/${SERVICE}.sh start $DEV
debug "Started ${SERVICE}$DEV service..."
fi
fi
/usr/bin/${SERVICE}.sh wait $DEV
}
stop() {
debug "Stopping ${SERVICE}$DEV service..."
check_warm_boot
check_fast_boot
debug "Warm boot flag: ${SERVICE}$DEV ${WARM_BOOT}."
debug "Fast boot flag: ${SERVICE}$DEV ${FAST_BOOT}."
if [[ x"$WARM_BOOT" == x"true" ]]; then
# Send USR1 signal to all teamd instances to stop them
# It will prepare teamd for warm-reboot
# Note: We must send USR1 signal before syncd, because it will send the last packet through CPU port
docker exec -i ${SERVICE}$DEV pkill -USR1 -f ${TEAMD_CMD} > /dev/null || [ $? == 1 ]
elif [[ x"$FAST_BOOT" == x"true" ]]; then
# Kill teamd processes inside of teamd container with SIGUSR2 to allow them to send last LACP frames
# We call `docker kill teamd` to ensure the container stops as quickly as possible,
# Note: teamd must be killed before syncd, because it will send the last packet through CPU port
docker exec -i ${SERVICE}$DEV pkill -USR2 -f ${TEAMD_CMD} || [ $? == 1 ]
while docker exec -i ${SERVICE}$DEV pgrep -f ${TEAMD_CMD} > /dev/null; do
sleep 0.05
done
docker kill ${SERVICE}$DEV &> /dev/null || debug "Docker ${SERVICE}$DEV is not running ($?) ..."
fi
/usr/bin/${SERVICE}.sh stop $DEV
debug "Stopped ${SERVICE}$DEV service..."
}
DEV=$2
SERVICE="teamd"
TEAMD_CMD="/usr/bin/teamd"
DEBUG_LOG="/tmp/teamd-debug$DEV.log"
NAMESPACE_PREFIX="asic"
if [ "$DEV" ]; then
NET_NS="$NAMESPACE_PREFIX$DEV" #name of the network namespace
SONIC_DB_CLI="sonic-db-cli -n $NET_NS"
else
SONIC_DB_CLI="sonic-db-cli"
fi
case "$1" in
start|wait|stop)
$1
;;
*)
echo "Usage: $0 {start|wait|stop}"
exit 1
;;
esac