add log for time spent for waiting for zebra

Author: shi-su

dockers/docker-fpm-frr/Dockerfile.j2

@@ -54,12 +54,7 @@ COPY ["TSA", "/usr/bin/TSA"]
 COPY ["TSB", "/usr/bin/TSB"]
 COPY ["TSC", "/usr/bin/TSC"]
 COPY ["files/supervisor-proc-exit-listener", "/usr/bin"]
-<<<<<<< HEAD
-COPY ["bgpd.sh", "/usr/bin/"]
-=======
-COPY ["critical_processes", "/etc/supervisor"]
 COPY ["zsocket.sh", "/usr/bin/"]
->>>>>>> make a separate script to wait zebra to be ready to receive connections
 RUN chmod a+x /usr/bin/TSA && \
     chmod a+x /usr/bin/TSB && \
     chmod a+x /usr/bin/TSC && \

dockers/docker-fpm-frr/zsocket.sh

@@ -24,9 +24,13 @@ while getopts ":a:o:h" opt; do
     esac
 done
 
+start=$(date +%s.%N)
 timeout 5s bash -c -- "until </dev/tcp/${addr}/${port}; do sleep 0.1;done"
 if [ "$?" != "0" ]; then
     logger -p error "Error: zebra is not ready to accept connections"
+else
+    timespan=$(awk "BEGIN {print $(date +%s.%N)-$start; exit}")
+    logger -p info "It took ${timespan} seconds to wait for zebra to be ready to accept connections"
 fi
 
 exit 0