How to apply multiple parallel consecutive ssh sessions

thanos1983 has asked for the wisdom of the Perl Monks concerning the following question:

Hello Monks,

I have created a script that can run in parallel multiple ssh connections, I am using the Net::OpenSSH::Parallel module for my task. Well my problem now is that I do not know if there is a way to apply multiple ssh connections to different primary servers, and as a second step I need to apply ssh connections to secondary servers and execute a set of commands.

Update: Primary and secondary servers are first and second line of servers. Further analysis, I have a set of different servers that I need to ssh simultaneously, those are the primary servers. Once I login to the primary servers then as a second step I want to ssh to the secondary servers.

localhost -->  Primary 1st --> Secondary 1st
localhost -->  Primary 2nd --> Secondary 2nd
localhost -->  Primary 3rd --> Secondary 3rd
...
...
...
localhost -->  Primary nth --> Secondary nth
[download]

So my question, is that possible to be done with Perl?

Update 2: I have found a possible solution, ssh tunnel via multiple hops but I was wondering if it can be done by a module or possibly to be combined with Net::OpenSSH::Parallel module.

It is mandatory and important to me to execute the commands simultaneously at all servers. this is the reason that I am using the Net::OpenSSH::Parallel module.

Once more thank you for your time and effort to assist me.

Seeking for Perl wisdom...on the process of learning...not there...yet!

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Re: How to apply multiple parallel consecutive ssh sessions by salva (Canon) on Jan 06, 2015 at 23:43 UTC
What are "primary" and "secondary" servers? Elaborate your problem description, please!	[reply]
Re^2: How to apply multiple parallel consecutive ssh sessions by thanos1983 (Parson) on Jan 07, 2015 at 00:02 UTC
Hello salva, Thank you for your time and effort reading my question, I have updated the question and I have added a small graph to explain the steps of my process. Seeking for Perl wisdom...on the process of learning...not there...yet!	[reply] [d/l] [select]
Re^3: How to apply multiple parallel consecutive ssh sessions by salva (Canon) on Jan 07, 2015 at 09:40 UTC
You can use Net::OpenSSH::Gateway. It never went into CPAN because I was unhappy with its internal architecture and was planning a complete revamp, but unfortunately never got the time/guts to actually do it. In any case, it works reliably. Just install it and tell Net::OpenSSH(::Parallel) to use it with the `gateway` option: `$pssh->add_host($secondary_server, gateway => { proxies => "ssh://$primary_server" }, ... );` [download] Or in case you want to pass additional options when constructing the underlaying Net::OpenSSH object used to connect to the primary server: `$pssh->add_host($secondary_server, gateway => { proxies => { url => "ssh://$primary_serve +r", user => $primary_user, password => $primary_passwor +d, ... } }, ... );` [download]	[reply] [d/l] [select]
Re^4: How to apply multiple parallel consecutive ssh sessions by thanos1983 (Parson) on Jan 07, 2015 at 14:34 UTC
Re: How to apply multiple parallel consecutive ssh sessions by jellisii2 (Hermit) on Jan 07, 2015 at 12:45 UTC
This sounds like something that would be better accomplished by a tool like Salt, Puppet, or something of its ilk?	[reply]
Re^2: How to apply multiple parallel consecutive ssh sessions by thanos1983 (Parson) on Jan 07, 2015 at 14:38 UTC
Hello jellisii2, Thank you for your time and effort. Both tools seems to be interesting but because I have all ready developed my solution in Perl and I do not want to recreate something from scratch. It always good to know that there are alternatives to get things done. Seeking for Perl wisdom...on the process of learning...not there...yet!	[reply] [d/l] [select]