F5 Automation - TCL & Bash

Problem this snippet solves:

This is a really simple way to automate CLI command execution on multiple F5 devices using Bash & TCL scripting.

How to use this snippet:

On a linux machine that is utilized to connect to the F5 device:

Create a directory

mkdir F5_Check

Within the "F5_Check" directory, create the following 3 files:

F5_Host.txt (This file contains F5's IP address)

F5_Bash_v1 (This is the bash script used to collect username/password for F5)

F5_Out_v1.exp (This is the TCL script executes the relevant commands on F5)

Explanation of the 3 files:

File Content: F5_Out_v1.exp is provided as code share. This is the main TCL script that is utiliezd to execute CLI commands on multiple F5 devices.

File Content: F5_Bash_v1

#!/bin/bash
# Collect the username and password for F5 access
echo -n "Enter the username "
read -s -e user
echo -ne '\n'
echo -n "Enter the password "
read -s -e password
echo -ne '\n'

# Feed the expect script a device list & the collected username & passwords
for device in `cat ~/F5_Check/F5_Host.txt`; do
 ./F5_Out_v1.exp $device $password $user ;
 done

File Contents: F5_Host.txt

This contains the management IP of the F5 devices.

Example:

cat F5_Host.txt 
    10.12.12.200
    10.12.12.201
    10.12.12.202 
    10.12.12.203

Code :

#!/usr/bin/expect -f

# Set variables
set hostname [lindex $argv 0]
set password [lindex $argv 1]
set username [lindex $argv 2]

# Log results
log_file -a ~/F5_Check/F5LOG.log

# Announce which device we are working on and the time
send_user "\n"
send_user ">>>>>  Working on $hostname @ [exec date] <<<<<\n"
send_user "\n"

# SSH access to device
spawn ssh $username@$hostname

expect {
"no)? " { 
send "yes\n"
expect "*assword: "
sleep 1
send "$password\r"
}
"*assword: " { 
sleep 1
send "$password\r"
 }
}

expect "(tmos)#"
send "sys\n"
expect "(tmos.sys)#"

send "show software\n"
expect "#"
send "exit\n"
expect "#"
send "quit\n"

expect ":~\$"
exit

Tested this on version:

11.5