Ruby - checking ping status featback with ssh, backtick via ssh?

问题

In my project I want to write a script to check if every device in my network is online/reachable. I have a method called pingtest and it works for now..

def pingtest(destination)
    system("ping -n 2 #{destination}")
    if $? == 0                                #checking status of the backtick
        puts "\n Ping was successful!"
    else
        close("Device is unreachable. Check the config.txt for the correct IPs.")
        #close() is just print & exit..
    end
end

Now I wanted to ping via a ssh session with an other device in my network:

#--------------------------------
require 'net/ssh' 
Net::SSH.start(@ip, @user, :password => @password)
#--------------------------------

@ssh = Ssh.new(@config)
@ssh.cmd("ping -c 3 #{@IP}")

The ping works fine but how can I use my backtrack idea now to determine if it was succesful or not?
I thought about using a sftp connection..

"ping -c 3 #{@IP} => tmpfile.txt" => download => check/compare => delete

(or something like that) to check if it was correct, but im not statusfied with that. Is there a possibility to check the success status like I did before?
I also tried something like this..

result = @ssh.cmd("ping -c 3 #{@IP}")
if result.success? == 0 # and so on..

I startet learning ruby some days ago, so im a newbie looking forward for your ideas to help me with this problem.

回答1:

You can use Net::SSH to run the command remotely, similarly to what you've already got there.

The result returned from running the command will be whatever is written to both stdout and stderr.

You can use the contents of that returned value to check if it was successful or not.

Net::SSH.start(@ip, @user. password: @password) do |ssh|
  response = ssh.exec! "ping -c 3 #{@other_ip}"
  if response.include? 'Destination Host Unreachable'
    close("Host unreachable. Result was: #{result}")
  else
    puts "\n Ping was successful"
  end
end

来源：https://stackoverflow.com/questions/29842698/ruby-checking-ping-status-featback-with-ssh-backtick-via-ssh

标签

ruby

ssh

backticks