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bug#43239: closed ([PATCH] gnu: Add guile-prometheus.)

From: GNU bug Tracking System
Subject: bug#43239: closed ([PATCH] gnu: Add guile-prometheus.)
Date: Sun, 06 Sep 2020 18:26:02 +0000

Your message dated Sun, 06 Sep 2020 19:25:15 +0100
with message-id <874koan4ok.fsf@cbaines.net>
and subject line Re: [bug#43239] [PATCH] gnu: Add guile-prometheus.
has caused the debbugs.gnu.org bug report #43239,
regarding [PATCH] gnu: Add guile-prometheus.
to be marked as done.

(If you believe you have received this mail in error, please contact

43239: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=43239
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems
--- Begin Message --- Subject: [PATCH] gnu: Add guile-prometheus. Date: Sun, 6 Sep 2020 13:07:44 +0100
* gnu/packages/guile-xyz.scm (guile-prometheus): New variable.
 gnu/packages/guile-xyz.scm | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/gnu/packages/guile-xyz.scm b/gnu/packages/guile-xyz.scm
index fa6855f43d..532a8008e5 100644
--- a/gnu/packages/guile-xyz.scm
+++ b/gnu/packages/guile-xyz.scm
@@ -853,6 +853,36 @@ Vicare Scheme and IronScheme.  Right now it contains:
 @end itemize\n")
     (license license:bsd-3)))
+(define-public guile-prometheus
+  (let ((commit "cbc6e1b03512443a03d66414c426adb8470b5f2b")
+        (revision "0"))
+    (package
+    (name "guile-prometheus")
+    (version (string-append "0-" revision "." (string-take commit 7)))
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://git.cbaines.net/git/guile/prometheus";)
+                    (commit commit)))
+              (sha256
+               (base32
+                "1k1qg4ia87w2ipnf8cpikdc67lxi5bmahkhgk2x0i9ibdyvqb7np"))
+              (file-name (string-append name "-" version "-checkout"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("autoconf" ,autoconf)
+       ("automake" ,automake)))
+    (inputs
+     `(("guile" ,guile-3.0)))
+    (home-page "https://git.cbaines.net/guile/prometheus";)
+    (synopsis "Prometheus client library for Guile")
+    (description
+     "This Guile library provides instrumentation code intended to be used
+with the Prometheus time series service.  Counter, gauge and histogram metric
+types are supported.")
+    (license license:gpl3+))))
 (define-public guile2.2-pfds
     (inherit guile-pfds)

--- End Message ---
--- Begin Message --- Subject: Re: [bug#43239] [PATCH] gnu: Add guile-prometheus. Date: Sun, 06 Sep 2020 19:25:15 +0100 User-agent: mu4e 1.4.13; emacs 26.3
Mathieu Othacehe <othacehe@gnu.org> writes:

> Hello Christopher,
>> +    (name "guile-prometheus")
>> +    (version (string-append "0-" revision "." (string-take commit 7)))
> I think that the usual pattern is something like:
> --8<---------------cut here---------------start------------->8---
>       (version (git-version "0.0.1" revision commit))
> --8<---------------cut here---------------end--------------->8---

Ah, yeah, I copied from a package definition not using that.

>> +    (inputs
>> +     `(("guile" ,guile-3.0)))
>> +    (home-page "https://git.cbaines.net/guile/prometheus";)
> The linter reports that this URL is not reachable.

I think it's actually the source URL (with the /git bit in it ) that it
complains about:

gnu/packages/guile-xyz.scm:862:12: guile-prometheus@0-0.cbc6e1b: URI 
https://git.cbaines.net/git/guile/prometheus not reachable: 404 ("Not Found")

While the home page URL definitely works, that URL does 404, however it
seems to work just fine for cloning the repository, so I'm not quite
sure what if anything to do with this lint warning.

>> +    (synopsis "Prometheus client library for Guile")
>> +    (description
>> +     "This Guile library provides instrumentation code intended to be used
>> +with the Prometheus time series service.  Counter, gauge and histogram 
>> metric
>> +types are supported.")
>> +    (license license:gpl3+))))
> Otherwise, looks fine! Turns out I'm currently working on adding some
> metrics to Cuirass[1]. With commit 154232b, we should be able to add the
> two metrics proposed in the bug report. The next step is to actually
> compute, save and display those metrics.
> I'm just discovering this prometheus but may it could be a good
> candidate? Do you happen to have a server running prometheus?

I've with the version change, I've gone ahead and pushed. Thanks for
taking a look!

As for Cuirass metrics, that sounds exciting. I do happen to have a
Prometheus instance [1] which I've been using to monitor machines and
the Guix Build Coordinator that I run for the guix.cbaines.net build

1: http://mago.cbaines.net:9090/

While Prometheus can generate graphs, I've been using Grafana [2] to
build dashboards to visualise the Prometheus data.

2: http://mago.cbaines.net:3000/

This [4] is the dashboard I have for the guix.cbaines.net stuff, which
pulls together data from the node exporter service on the various
machines as well as the Guix Build Coordinator coordinator service
itself [5].

4: http://mago.cbaines.net:3000/d/gMq2pj3Wk/guix-cbaines-net
5: https://coordinator.guix.cbaines.net/metrics

Today, I've just started getting the Guix Data Service to export some
metrics [6] as I want to try and understand how the size of different
tables and indexes in the database change over time. There's a Grafana
dashboard for that too [7].

6: https://data.guix-patches.cbaines.net/metrics
7: http://mago.cbaines.net:3000/d/w7YijfvGz/guix-data-service

Additionally, I'm also running Alertmanager [8] which can send out
emails, for example when a machine is low on disk space.

8: http://mago.cbaines.net:9093/

Anyway, if you decide to have Cuirass export metrics in the Prometheus
style, just let me know and I can get the Prometheus instance I'm
running to scrape them. I can also give you access to Grafana so you can
create dashboards.

Thanks again,


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