expect(1) script to force puppet on EL6 hosts in a subnet

force_automation

#!/usr/bin/expect -f
#
# force puppet on previously unmanaged centos 6 hosts
#
# author: Aaron <azet@azet.org> Zauner @ 7.2.2014
# depends: expect
# license: MIT
#
set timeout 60

set network "10.60.40"
set password "changeme"

# return return value of a spawned process
proc return_val {id} {
 	set waitval [wait -i $id]
        set exval [lindex $waitval 3]
	return $exval
}

# main loop
for {set i 20} {$i < 254} {incr i} {
	set ip "$network.$i"
	
	puts " >> trying $ip."
        # check if host is pingable i.e. online
        spawn timeout 2 ping -c 2 $ip
        if {[return_val $spawn_id] != 0} {
                continue
        }

        # try to connect via SSH
        spawn ssh $ip -lroot -o ConnectTimeout=5
        # ssh authentication procedure
        expect {
                "yes/no" {
                	send "yes\r"
                }
                "?assword: " 	{ send "$password\r" }
                "*Connection"   { continue }
		"?ffending"	{ continue }
        }
	expect {
		"*# " {
			send "rpm -ivh https://yum.puppetlabs.com/el/6/products/x86_64/puppetlabs-release-6-7.noarch.rpm\r"
			expect "*# "
			send "yum install puppet -y ; chkconfig puppet on ; service puppet start\r"
		}
		"?assword: " 	{ continue }
                "*Connection"   { continue }
	}
        expect "*# "
        send "exit\r"
        expect eof
	puts " >> done with $ip."
}

exit 0

#EOF