Yes, we use a recording rules to represent node memory utilization. https://gitlab.com/gitlab-com/runbooks/-/blob/1682a5632f3eaf0548dfa8277a421de2aff24245/rules/node.yml#L91-106
On Wed, Jun 17, 2020 at 6:14 PM Christian Hoffmann < [email protected]> wrote: > Hi, > > On 6/17/20 4:44 PM, Yasmine Mbarek wrote: > > I have a tiny problem with node exporter. If you can help me I will be > > very grateful . > > So my node exporter implemented in my parc of machines , for some > > machine it works fine and returns all metrics values but in other > > machine it returns everything but "RAM Used" , the difference between > > the working machines and the others is that : on the machines that RAM > > used is working fine , the OS is redhat 7 > > the rest of machines Redhat 6 everything is working but the RAM used > > returns NO DATA > > Is there any explanation ?? > > I assume you are using Grafana with some kind of node_exporter dashboard? > > You would have to look into the actual queries to see what's causing this. > > My guess: The dashboard most likely uses the MemAvailable metric (which > comes from /proc/meminfo). This is exposed by the Linux kernel, but only > after some specific version. RHEL6 does not expose it. > > There are ways to calculate something similar for RHEL6 (the "free" > command line tool has some logic for this). > > I think GitLab had a public Prometheus config with a recording rule, > maybe it was this one: > > > https://gitlab.com/gitlab-org/gitlab-foss/-/commit/e91c7469ad0be5f429548d4142ca93c17ec9e71e > > You would have to set up such a recording rule and would have to modify > your dashboard accordingly. > > As an alternative: Try talking your administrators into abandoning > RHEL6. It'll be out of support at the end of the year anyway, IIRC. :) > > Kind regards, > Christian > > -- > You received this message because you are subscribed to the Google Groups > "Prometheus Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/prometheus-users/6fbaa443-48f3-1bd0-962d-490e4cde4b80%40hoffmann-christian.info > . > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/CABbyFmpC_vTZtq5o1gzBeMG%3Dt6H4MVrg%2Bt34%2BzK2S_6OZu4EJg%40mail.gmail.com.
