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Posted to users@trafficserver.apache.org by salil GK <gk...@gmail.com> on 2017/03/28 06:12:43 UTC
Help regarding traffic_cts
Hi
I have a doubt regarding the traffic_ctl command. In my setup I am
running two instances of traffic server. This I am doing by specifying two
different directories for configuration. Now when I run traffic_ctl how do
I control the configuration reload. I mean traffic_ctl need to read the
correct configuration file and update the variables of respective instance.
How do I do this ?
How does the trffic*ctl update the configuration variables
of traffic_server* – is it some IPC mechanism ?
Thanks
~S
Re: Help regarding traffic_cts
Posted by salil GK <gk...@gmail.com>.
Thanks Alan
I will take a look at that and see if I can do some thing
from my first investigation I guess this would do
if not (socketpath = getenv(TS_RUNTIME_DIR) )
socketpath = TS_BUILDTIME_DIR
On 28 March 2017 at 23:26, Alan M. Carroll <am...@network-geographics.com>
wrote:
> I wouldn't think so - it should be baked in to the traffic_ctl binary. Do
> you mean you are using the same binaries to run both instances? In that
> case, yes, traffic_ctl would need some indication of which .sock to open.
> Looks like the the call to TSInit is the magic place, with a first argument
> of the path to the socket. The current implementation passes nullptr which
> I presume means "use the built in string" but it should be easy to pass
> something else there.
>
> Tuesday, March 28, 2017, 11:58:40 AM, you wrote:
>
> > so basically I need to tell traffic_ctl to write to socket file in 'my
> directory' rather than default build time directory. Which routine does
> the notification to traffic_manager ?
>
>
Re: Help regarding traffic_cts
Posted by "Alan M. Carroll" <am...@network-geographics.com>.
I wouldn't think so - it should be baked in to the traffic_ctl binary. Do you mean you are using the same binaries to run both instances? In that case, yes, traffic_ctl would need some indication of which .sock to open. Looks like the the call to TSInit is the magic place, with a first argument of the path to the socket. The current implementation passes nullptr which I presume means "use the built in string" but it should be easy to pass something else there.
Tuesday, March 28, 2017, 11:58:40 AM, you wrote:
> so basically I need to tell traffic_ctl to write to socket file in 'my directory' rather than default build time directory. Which routine does the notification to traffic_manager ?
Re: Help regarding traffic_cts
Posted by salil GK <gk...@gmail.com>.
so basically I need to tell traffic_ctl to write to socket file in 'my
directory' rather than default build time directory. Which routine does
the notification to traffic_manager ?
Thanks
Salil
On 28 March 2017 at 21:13, salil GK <gk...@gmail.com> wrote:
> Thanks Alan for the reply
>
> I have done changes to traffic manager source to support two instances of
> traffic server to run in the system.
> Now I can see two different set of .../var/ files are created the moment I
> run traffic_manager. It includes three .sock files too.
> I was trying to find out where exactly the IPC call happens from
> traffic_control. Could you please help me understand the call sequence from
> traffoc_control on how this IPC works - like which library function is
> doing this work ? I assume that it is just delivering some message from
> traffic_ctl to traffic_manager ( ? )
>
> Thanks
> Salil
>
> On 28 March 2017 at 20:34, Alan Carroll <so...@yahoo-inc.com>
> wrote:
>
>> traffic_ctl does IPC over a UNIX pipe to communicate with traffic_manager
>> which will, if needed, communicate with traffic_server. The file name of
>> the pipe is a compile time constant in traffic_ctl and traffic_manager.
>> Therefore which Traffic Server instance is affected is based on which
>> traffic_ctl binary you use.
>>
>>
>> On Monday, March 27, 2017, 8:12:56 PM CDT, salil GK <gk...@gmail.com>
>> wrote:
>>
>>
>> Hi
>>
>>
>> I have a doubt regarding the traffic_ctl command. In my setup I am
>> running two instances of traffic server. This I am doing by specifying two
>> different directories for configuration. Now when I run traffic_ctl how do
>> I control the configuration reload. I mean traffic_ctl need to read the
>> correct configuration file and update the variables of respective instance.
>> How do I do this ?
>>
>>
>> How does the trffic*ctl update the configuration variables
>> of traffic_server* – is it some IPC mechanism ?
>>
>>
>> Thanks
>>
>> ~S
>>
>
>
Re: Help regarding traffic_cts
Posted by salil GK <gk...@gmail.com>.
Thanks Alan for the reply
I have done changes to traffic manager source to support two instances of
traffic server to run in the system.
Now I can see two different set of .../var/ files are created the moment I
run traffic_manager. It includes three .sock files too.
I was trying to find out where exactly the IPC call happens from
traffic_control. Could you please help me understand the call sequence from
traffoc_control on how this IPC works - like which library function is
doing this work ? I assume that it is just delivering some message from
traffic_ctl to traffic_manager ( ? )
Thanks
Salil
On 28 March 2017 at 20:34, Alan Carroll <so...@yahoo-inc.com>
wrote:
> traffic_ctl does IPC over a UNIX pipe to communicate with traffic_manager
> which will, if needed, communicate with traffic_server. The file name of
> the pipe is a compile time constant in traffic_ctl and traffic_manager.
> Therefore which Traffic Server instance is affected is based on which
> traffic_ctl binary you use.
>
>
> On Monday, March 27, 2017, 8:12:56 PM CDT, salil GK <gk...@gmail.com>
> wrote:
>
>
> Hi
>
>
> I have a doubt regarding the traffic_ctl command. In my setup I am
> running two instances of traffic server. This I am doing by specifying two
> different directories for configuration. Now when I run traffic_ctl how do
> I control the configuration reload. I mean traffic_ctl need to read the
> correct configuration file and update the variables of respective instance.
> How do I do this ?
>
>
> How does the trffic*ctl update the configuration variables
> of traffic_server* – is it some IPC mechanism ?
>
>
> Thanks
>
> ~S
>
Re: Help regarding traffic_cts
Posted by Alan Carroll <so...@yahoo-inc.com>.
traffic_ctl does IPC over a UNIX pipe to communicate with traffic_manager which will, if needed, communicate with traffic_server. The file name of the pipe is a compile time constant in traffic_ctl and traffic_manager. Therefore which Traffic Server instance is affected is based on which traffic_ctl binary you use.
On Monday, March 27, 2017, 8:12:56 PM CDT, salil GK <gk...@gmail.com> wrote:
Hi
I have a doubt regarding the traffic_ctl command. In my setup I am running two instances of traffic server. This I am doing by specifying two different directories for configuration. Now when I run traffic_ctl how do I control the configuration reload. I mean traffic_ctl need to read the correct configuration file and update the variables of respective instance. How do I do this ?
How does the trfficctl update the configuration variables of traffic_server – is it some IPC mechanism ?
Thanks
~S