Thanks for this. I just ended up writing a log parser for the ptp4l output
which did the job as well. The current output contains exactly the outputs that
I wanted/needed.
The reason for asking here was to see if there was more value that I could add
by making this sort of thing available to the community at large rather than
just in my own personal project.
Cheers,
Matt
> On 28 Oct 2020, at 07:04, Richard Cochran <richardcoch...@gmail.com> wrote:
>
> On Wed, Jul 22, 2020 at 06:16:01AM -0700, Richard Cochran wrote:
>> On Wed, Jul 22, 2020 at 02:14:48PM +1000, Luke Howard wrote:
>>> [resending from correct email]
>>>
>>>> The output of the pmc tool is still unstructured text. So to feed it into
>>>> a script I would still need to write an output parser of some sort and I
>>>> would have to guess that my parser covers all of the cases that the tool
>>>> might generate and I would have to assume that the output format doesn’t
>>>> change. This is what got me thinking about structuring the output format
>>>> somehow in a way that any tool could consume it.
>>>
>>> Perhaps in that case a structured text option to pmc(8) would be useful and
>>> not too hard to add?
>>
>> In contrast to the logging, I think the pmc output is already
>> structured and easy to parse.
>
> Case in point:
>
> - I wanted to add simple client monitoring to a deployment.
>
> - Running pmc every second (or so) is really easy in systemd, and the
> output is logged automatically, BUT
>
> - the client's records are spread across multiple lines, and that is
> not very convenient in the syslog.
>
> - So, what do I do? Invent a new logging interface? Nah.
>
> Something like this in python could emit json pretty easily, I would
> expect...
>
> ---8<--- pmc-monitor.service ------
> [Unit]
> Description=PTP Logging Service
> After=network.target
>
> [Service]
> Type=exec
> ExecStart=/usr/local/bin/pmc-monitor.sh
> Restart=always
>
> [Install]
> WantedBy=multi-user.target
>
> ---8<--- pmc-monitor.sh ------
> #!/bin/sh
>
> while [ 1 ]; do
> pmc -u 'get current' | awk -e '
> function print_last_record() {
> if (!last) {
> return;
> }
> gsub("\t", " ", last);
> print last;
> }
> {
> if ($1 == "sending:") {
> next;
> }
> if ($4 == "RESPONSE" && $5 == "MANAGEMENT") {
> print_last_record();
> last = $1 " " $6;
> next;
> }
> last = last $0;
> }
> END {
> print_last_record();
> }
> '
> sleep 1
> done
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