[sonic-buildimage] Move BGP warm reboot scripts into BGP service /usr/local/bin

2020-01-08 10:14:37 -08:00 · 2020-01-08 10:14:37 -08:00 · d16d163fc4
commit d16d163fc4
parent 9d2d617264
1 changed files with 118 additions and 0 deletions
--- a/files/scripts/bgp.sh
+++ b/files/scripts/bgp.sh
@ -0,0 +1,118 @@
+#!/bin/bash
+
+SERVICE="bgp"
+DEBUGLOG="/tmp/bgp_debug.log"
+LOCKFILE="/tmp/bgp-lock"
+
+function debug()
+{
+		/usr/bin/logger $1
+		/bin/echo `date` "- $1" >> ${DEBUGLOG}
+}
+
+function lock_service_state_change()
+{
+    debug "Locking ${LOCKFILE} from ${SERVICE} service"
+
+    exec {LOCKFD}>${LOCKFILE}
+    /usr/bin/flock -x ${LOCKFD}
+    trap "/usr/bin/flock -u ${LOCKFD}" 0 2 3 15
+
+    debug "Locked ${LOCKFILE} (${LOCKFD}) from ${SERVICE} service"
+}
+
+function unlock_service_state_change()
+{
+    debug "Unlocking ${LOCKFILE} (${LOCKFD}) from ${SERVICE} service"
+    /usr/bin/flock -u ${LOCKFD}
+}
+
+function check_warm_boot()
+{
+    STATE_DBID_PORT=`python -c 'from swsssdk import _get_redis_dbid_port; print _get_redis_dbid_port("STATE_DB")'`
+    SYSTEM_WARM_START=`/usr/bin/redis-cli $STATE_DBID_PORT hget "WARM_RESTART_ENABLE_TABLE|system" enable`
+    SERVICE_WARM_START=`/usr/bin/redis-cli $STATE_DBID_PORT hget "WARM_RESTART_ENABLE_TABLE|${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
+        STATE_DBID_PORT=`python -c 'from swsssdk import _get_redis_dbid_port; print _get_redis_dbid_port("STATE_DB")'`
+        RESTORE_COUNT=`/usr/bin/redis-cli $STATE_DBID_PORT hget "WARM_RESTART_TABLE|orchagent" restore_count`
+        # We have to make sure db data has not been flushed.
+        if [[ -z "$RESTORE_COUNT" ]]; then
+            WARM_BOOT="false"
+        fi
+    fi
+}
+
+function wait_for_database_service()
+{
+    # Wait for redis server start before database clean
+    ping_pong_db_insts
+
+    # Wait for configDB initialization
+    until [[ $(/usr/bin/docker exec database redis-cli `python -c 'from swsssdk import _get_redis_dbid_port; print _get_redis_dbid_port("CONFIG_DB")'` GET "CONFIG_DB_INITIALIZED") ]];
+        do sleep 1;
+    done
+}
+
+start() {
+    debug "Starting ${SERVICE} service..."
+
+    lock_service_state_change
+
+    wait_for_database_service
+    check_warm_boot
+    validate_restore_count
+
+    debug "Warm boot flag: ${SERVICE} ${WARM_BOOT}."
+
+    # start service docker
+    /usr/bin/${SERVICE}.sh start
+    debug "Started ${SERVICE} service..."
+
+    # Unlock has to happen before reaching out to peer service
+    unlock_service_state_change
+}
+
+attach() {
+    startPeerService
+    /usr/bin/${SERVICE}.sh attach
+}
+
+stop() {
+    debug "Stopping ${SERVICE} service..."
+
+    [[ -f ${LOCKFILE} ]] || /usr/bin/touch ${LOCKFILE}
+
+    lock_service_state_change
+    check_warm_boot
+    debug "Warm boot flag: ${SERVICE} ${WARM_BOOT}."
+
+		# Kill bgpd to start the bgp graceful restart procedure, otherwise it sends Notification to peer
+		debug "Stopping ${SERVICE} service..."
+		/usr/bin/docker exec -i bgp pkill -9 zebra
+		/usr/bin/docker exec -i bgp pkill -9 bgpd || [ $? == 1 ]
+		
+    /usr/bin/${SERVICE}.sh stop
+    debug "Stopped ${SERVICE} service..."
+
+    # Unlock has to happen before reaching out to peer service
+    unlock_service_state_change
+}
+
+case "$1" in
+    start|attach|stop)
+        $1
+        ;;
+    *)
+        echo "Usage: $0 {start|attach|stop}"
+        exit 1
+        ;;
+esac