Re: [capistrano] How to limit the number of SSH channels that can be open

[Lee Hambley]

Ronie,

I'm not sure this is possible (but I could take a look) - do you have a specific problem with the existing implementation?

- Lee

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[Rafael G.]

El 18/05/10 16:58, Ronie Gilberto Henrich escribió:
> Hi,
>
> Is it possible to configure capistrano to limit the number of SSH
> channels that can be open to 1, so it does not use ssh connection
> multiplexing?
>
> Thanks,
> Ronie

Hi Ronie,

I guess you can use max_hosts option.

For example:

task :foo, :max_hosts => 1 do
#do some stuff
end

Good night


--
Rafa

[Ronie Gilberto Henrich]

Hi,

Is it possible to configure capistrano to limit the number of SSH channels that can be open to 1, so it does not use ssh connection multiplexing?

Thanks,
Ronie

[Ronie Gilberto Henrich]

Hi Lee,

Our servers have OpenSSH with maxsessions=1 for security purposes. But capistrano does not work when maxsessions=1.

Thanks,
Ronie

[Ronie Gilberto Henrich]

Hi Rafael,

max_hosts just limit the number of hosts, not the number of ssh channels per connection.


Thanks,
Ronie

[Rafael G.]

El 18/05/10 22:38, Ronie Gilberto Henrich escribió:

> Hi Rafael,
>
> max_hosts just limit the number of hosts, not the number of ssh channels per connection.
>
>
> Thanks,
> Ronie
>
>

Ok, I don't understood. I will see for it later.

--
Rafa

[Rafael G.]

El 18/05/10 22:38, Ronie Gilberto Henrich escribió:

> Hi Rafael,
>
> max_hosts just limit the number of hosts, not the number of ssh channels per connection.
>
>
> Thanks,
> Ronie
>
>

I'm seeing the code in capistrano/lib/capistrano/ssh.rb and said at line 35:

# If an :ssh_options key exists in +options+, it is passed to the
Net::SSH
# constructor.

It means that you can do things like this:

set :ssh_options, { :forward_agent => true }

Well, If you read Net::SSH::start[1] method you can see all the options
that accept. I guess the ":properties" parameters is that you need(the
help send you to Net:SSH::Session#properties to see what support), but I
don't find any reference about it.

Maybe, you should ask to net-ssh maintainer.

Regards




[1] http://net-ssh.rubyforge.org/ssh/v2/api/classes/Net/SSH.html#M000013

--
Rafa