[ClusterLabs] Antw: [EXT] Re: Parsing the output of crm_mon

[Ulrich Windl]

>>> Ken Gaillot <kgaillot at redhat.com> schrieb am 18.03.2022 um 13:39 in
Nachricht
<fd60ce035160e9b13ff84ead2ca88f63d9597529.camel at redhat.com>:
> On Fri, 2022‑03‑18 at 08:46 +0100, Ulrich Windl wrote:
>> Hi!
>> 
>> Parsing the output of crm_mon I wonder:
>> Is there a collection of sample outputs for pacemaker 1 and 2 formats
>> showing all types of resources?
> 
> Ideally, any parsing should be done of the XML output generated by ‑‑
> output‑as=xml since 2.0.3 and ‑‑as‑xml before then (the output is
> identical other than the outermost tag).

Agreed, but it's much trickier to parse XML with awk ;-)
Maybe it' even less efficient (unless crm_mon itself is much more efficient
when out putting XML)
With XPath support, I might be able to create the output I need using xrm_mon
only, but that's not implemented.

Regards,
Ulrich


> 
> The XML output is stable and only gets backward‑compatible additions
> once in a long while, but the text output changes more frequently and
> significantly.
> 
> There's an RNG schema for it, api‑result.rng (where it's installed
> depends on your build; in the source repository, make generates it
> under xml/api).
> 
>> 
>> Also I realized that the coutput for clone sets in unfortunate:
>> Consider a normal primitive like this:
>>   * primitive_name    (ocf::heartbeat:agent_name):  Started host‑name
>> And a clone set:
>>   * Clone Set: clone_name [primitive_name]:
>> 
>> If you want to filter clone sets by resource agent you're lost there.
>> It would have been nicht if the format of clone sets were:
>>   * Clone Set: clone_name [primitive_name]
>> (ocf::heartbeat:agent_name):
>> 
>> I see that there's the "‑R" option that "expands" the clones similar
>> as resource groups like this:
>>     * primitive_name     (ocf::heartbeat:agent):    Started host‑name
>> 
>> Regards,
>> Ulrich
>> 
>> 
>> 
>> 
>> 
>> 
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> ‑‑ 
> Ken Gaillot <kgaillot at redhat.com>
> 
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