[lttng-dev] lttng-relayd---->lttng-relayd communication

[Jonathan Rajotte-Julien]

On Mon, Feb 05, 2018 at 04:02:13PM +0000, Jesper Derehag wrote:
> Or netcat if you want to skip the encryption overhead.

Good point!

Also for a more permanent installation I think one could use IPtables.
Unfortunately, I do not use IPtables enough to give advices on that end.

Cheers

> 
> /Jesper
> 
> ________________________________________
> Från: lttng-dev <lttng-dev-bounces at lists.lttng.org> för Jonathan Rajotte-Julien <jonathan.rajotte-julien at efficios.com>
> Skickat: den 3 februari 2018 19:11
> Till: Ramith Shetty
> Kopia: lttng-dev at lists.lttng.org
> Ämne: Re: [lttng-dev] lttng-relayd---->lttng-relayd communication
> 
> Hi,
> 
> On Sat, Feb 03, 2018 at 05:08:25AM +0000, Ramith Shetty wrote:
> >
> > If we have a setup as below. Can we stream the logs to host SystemA  from TargetB below?
> >
> > Here TargetA and TargetB are part of a private network. Only TargetA has connectivity to SystemA. We need to stream data from TargetB to SystemA.
> >
> > [    TargetB----->TargetA    ]------->[SystemA]
> 
> This seems like a perfect match for ssh tunneling via TargetA.
> 
> On System A:
>     Start lttng-relayd.
>       The default ports are as follow:
>         Control port: tcp://0.0.0.0:5342
>         Data port: tcp://0.0.0.0:5343
>         Live port: tcp://localhost:5344
> 
> On Target B:
>     Create a ssh tunnel via Target A:
>       ssh -nNT -L 9990:SystemA:5342 -L 9991:SystemA:5343 targetA
> 
>     Setup live session correctly:
>       lttng create --set-url net://localhost:9990:9991 --live
>       lttng ...
> 
> At that point you should be able to attach locally a babeltrace to SystemA.
> Note that the ssh tunnel needs to be up for everything to work. It might require
> some adjustment depending on your network configuration etc.
> 
> I tested it locally with 3 VMs and everything seems to work fine.
> 
> Cheers
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-- 
Jonathan Rajotte-Julien
EfficiOS