Add Network Snapshot Script (#8)

* Add network-snapshot.sh

A bash script to gather network stats from ip, netstat, arp, and
ethtool commands. Script will exist in root directory of image and
output is saved in /home/network-snapshot-output dir with a date based
on the day when the script was executed.

Signed-off-by: Mick Tarsel <[email protected]>

* Fix back slashes

---------

Signed-off-by: Mick Tarsel <[email protected]>

Dockerfile

@@ -16,6 +16,8 @@ RUN dnf install --best --refresh -y \
       udev \
       vim-enhanced \
     && dnf clean all \
-    && rm -rf /var/cache/yum \
+    && rm -rf /var/cache/yum 
+
+COPY --chmod=777 network-snapshot.sh /usr/local/bin/network-snapshot.sh
 
 CMD ["sleep", "infinity"]

network-snapshot.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+#Written by Mick Tarsel
+#create a network "snapshot"
+#Only shows IPv4  
+
+OUT_DIR="/home/network-snapshot-output"
+OUT_FILE=$OUT_DIR/$(date +"%m-%d-%Y")-outputski.txt
+
+title () {
+    echo "" &>> $OUT_FILE;
+    echo "" &>> $OUT_FILE;
+    echo "" &>> $OUT_FILE;
+    echo "#####################" &>> $OUT_FILE;
+    echo "  $1  " &>> $OUT_FILE;
+    echo "#####################" &>> $OUT_FILE;
+    echo "" &>> $OUT_FILE;
+}
+
+command_out () {
+    #the first parameter of this func is the command. save output to file
+    $1 &>> $OUT_FILE
+}
+
+mkdir -p $OUT_DIR
+touch $OUT_FILE
+
+primary_interface=$(ip -o -4 route show to default | awk '{print $5}')
+#list default route and assume that device is primary interface
+hostname=$(cat /etc/hostname)
+
+title "Hostname: $hostname"
+
+title "Default Route Network Interface: $primary_interface"
+
+title "IPv4 Addresses"
+command_out "ip -4 addr"
+
+title "IP Link Stats"
+command_out "ip -4 -s link show"
+
+title "Netstat Stats"
+command_out "netstat -4 -s"
+
+title "Netstat Listening Ports"
+command_out "netstat -tulpn | grep LISTEN"
+
+title "ARP"
+command_out "arp"
+
+title "Route"
+command_out "route -n" 
+
+title "IP Route"
+command_out "ip -4 route"
+
+title "IP Neighbor"
+command_out "ip -4 neigh show"
+
+title "All IP Addresses"
+command_out "ip addr"
+
+title "ethtool info for $primary_interface"
+command_out "ethtool -i $primary_interface"
+
+title "ethtool Stats for $primary_interface"
+command_out "ethtool -S $primary_interface"
+
+title "ethtool Features for $primary_interface"
+command_out "ethtool -k $primary_interface"
+
+echo "Network info saved in $OUT_FILE"
+
+#Some other helpful places to check :) 
+#cat  /proc/sys/net/ipv4/conf
+#iptables-save -c
+#journalctl -u Network-Manager.service --no-pager