capture egress traffic on non-loopback interface only (#527)

Author: burmecia

ansible/files/admin_api_scripts/pg_egress_collect.pl

@@ -2,13 +2,13 @@
 
 # This script receive tcpdump output through STDIN and does:
 #
-# 1. extract outgoing TCP packet length on all devices port 5432 and 6543
+# 1. extract outgoing TCP packet length on the 1st non-loopback device port 5432 and 6543
 # 2. sum the length up to one minute
 # 3. save the total length to file (default is /tmp/pg_egress_collect.txt) per minute
 #
 # Usage:
 #
-# tcpdump -s 128 -Q out -i any -nn -tt -vv -p -l 'tcp and (port 5432 or port 6543)' | perl pg_egress_collect.pl -o /tmp/output.txt
+# tcpdump -s 128 -Q out -nn -tt -vv -p -l 'tcp and (port 5432 or port 6543)' | perl pg_egress_collect.pl -o /tmp/output.txt
 #
 
 use POSIX;

ansible/files/pg_egress_collect.service.j2

@@ -3,7 +3,7 @@ Description=Postgres Egress Collector
 
 [Service]
 Type=simple
-ExecStart=/bin/bash -c "tcpdump -s 128 -Q out -i any -nn -tt -vv -p -l 'tcp and (port 5432 or port 6543)' | perl /root/pg_egress_collect.pl"
+ExecStart=/bin/bash -c "tcpdump -s 128 -Q out -nn -tt -vv -p -l 'tcp and (port 5432 or port 6543)' | perl /root/pg_egress_collect.pl"
 User=root
 Slice=services.slice
 Restart=always