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mixin: Add fallback for MemAvailable (#2130)

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Add a fallback to Buffers+Cached+MemFree+Slab for older Linux kernels
where the MemAvailable metric is not available for memory utilization.

Signed-off-by: Ben Kochie <superq@gmail.com>
This commit is contained in:
Ben Kochie 2021-09-28 10:22:06 +02:00 committed by GitHub
parent 0aec407666
commit aeef1edd62
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1 changed files with 10 additions and 0 deletions
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10
docs/node-mixin/rules/rules.libsonnet
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@ -42,6 +42,16 @@
expr: ||| expr: |||
1 - ( 1 - (
node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} node_memory_MemAvailable_bytes{%(nodeExporterSelector)s}
or
(
node_memory_Buffers_bytes{%(nodeExporterSelector)s}
+
node_memory_Cached_bytes{%(nodeExporterSelector)s}
+
node_memory_MemFree_bytes{%(nodeExporterSelector)s}
+
node_memory_Slab_bytes{%(nodeExporterSelector)s}
)
/ /
node_memory_MemTotal_bytes{%(nodeExporterSelector)s} node_memory_MemTotal_bytes{%(nodeExporterSelector)s}
) )