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[Metricbeat][Kubernetes Volume] Add pvc reference to distinguish ephemeral from persistent volumes #38839

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merged 19 commits into from
May 16, 2024
Merged

[Metricbeat][Kubernetes Volume] Add pvc reference to distinguish ephemeral from persistent volumes #38839

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5b4a487
Kubernetes add pvc reference in the kubernetes.volume dataset if present
herrBez Apr 9, 2024
ede64ae
Reuse field kubernetes.persistentvolumeclaim instead of creating a ne…
herrBez Apr 10, 2024
5026f50
Add only persistentvolumeclaim name and no namespace (that is redunda…
herrBez Apr 10, 2024
375e742
Merge branch 'elastic:main' into kubernetes-pvc-volume
herrBez Apr 10, 2024
b0dd8a4
Add test to see if persistentvolumeclaim name is extracted
herrBez Apr 10, 2024
d5cfb1f
Add a separate test for pvc
herrBez May 2, 2024
e1ba07b
Merge branch 'main' into kubernetes-pvc-volume
herrBez May 2, 2024
0f78c41
Add changelog entry for the PR
herrBez May 2, 2024
9a0cf91
Add the persistentvolume claim field
herrBez May 2, 2024
698eb17
Run mage update to update the fields
herrBez May 2, 2024
39d255e
Remove the duplicate definition of the field kubernetes.persistentvol…
herrBez May 8, 2024
8a6eeff
Remove newline
herrBez May 8, 2024
a8b3092
Fix key from kubernetes.volume.persistentvolumeclaim.name to kubernet…
herrBez May 10, 2024
d206ac5
Merge branch 'main' into kubernetes-pvc-volume
herrBez May 10, 2024
9e9a600
Merge branch 'main' into kubernetes-pvc-volume
herrBez May 13, 2024
cec10b2
Fix unit test after changing the populated field name
herrBez May 14, 2024
14cff40
Merge branch 'kubernetes-pvc-volume' of github.com:herrBez/beats into…
herrBez May 14, 2024
ef19ff0
Removed printf function
herrBez May 14, 2024
835d991
Remove empty lines added by mistake
herrBez May 14, 2024
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6 changes: 5 additions & 1 deletion metricbeat/module/kubernetes/_meta/test/stats_summary.json
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Original file line number Diff line number Diff line change
Expand Up @@ -121,7 +121,11 @@
"inodesFree": 473551,
"inodes": 473560,
"inodesUsed": 9,
"name": "default-token-sg8x5"
"name": "default-token-sg8x5",
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can you please add a separate sample with the pvcRef to keep in the test file both examples - one for persistentvolumeclaim and one for the ephemeral volume?

"pvcRef": {
"name": "pvc-demo",
"namespace": "default"
}
}
]
}
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4 changes: 4 additions & 0 deletions metricbeat/module/kubernetes/types.go
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Expand Up @@ -131,6 +131,10 @@ type Summary struct {
InodesUsed uint64 `json:"inodesUsed"`
Name string `json:"name"`
UsedBytes uint64 `json:"usedBytes"`
PvcRef struct {
Name string `json:"name"`
Namespace string `json:"namespace"`
} `json:"pvcRef"`
} `json:"volume"`
} `json:"pods"`
}
3 changes: 3 additions & 0 deletions metricbeat/module/kubernetes/volume/data.go
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Expand Up @@ -75,6 +75,9 @@ func eventMapping(content []byte, logger *logp.Logger) ([]mapstr.M, error) {
if volume.Inodes > 0 {
kubernetes2.ShouldPut(volumeEvent, "fs.inodes.pct", float64(volume.InodesUsed)/float64(volume.Inodes), logger)
}
if volume.PvcRef.Name != "" {
kubernetes2.ShouldPut(volumeEvent, "persistentvolumeclaim.name", volume.PvcRef.Name, logger)
}
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I have the feeling that this way the field that will be generated will be kubernetes.volume.persistentvolumeclaim.name . Is that what you want?

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Wow, great static analysis :D.. Indeed, its creating the field you mention. I actually want to reuse the field kubernetes.persistentvolumeclaim.name to allow correlation, but I am honestly a little bit lost.

After some thinking I tried with:

kubernetes2.ShouldPut(volumeEvent, mb.ModuleDataKey+".persistentvolumeclaim.name", volume.PvcRef.Name, logger)

But it does not seem to work 🤔

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@herrBez herrBez May 10, 2024 •
edited
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Ok, the line I wrote in the comment is correct. For some reasons I were still using the old binary 🤦

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I had the feeling 😂

events = append(events, volumeEvent)
}

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17 changes: 9 additions & 8 deletions metricbeat/module/kubernetes/volume/volume_test.go
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Expand Up @@ -49,14 +49,15 @@ func TestEventMapping(t *testing.T) {
testCases := map[string]interface{}{
"name": "default-token-sg8x5",

"fs.available.bytes": 1939689472,
"fs.capacity.bytes": 1939701760,
"fs.used.bytes": 12288,
"fs.used.pct": float64(12288) / float64(1939701760),
"fs.inodes.used": 9,
"fs.inodes.free": 473551,
"fs.inodes.count": 473560,
"fs.inodes.pct": float64(9) / float64(473560),
"fs.available.bytes": 1939689472,
"fs.capacity.bytes": 1939701760,
"fs.used.bytes": 12288,
"fs.used.pct": float64(12288) / float64(1939701760),
"fs.inodes.used": 9,
"fs.inodes.free": 473551,
"fs.inodes.count": 473560,
"fs.inodes.pct": float64(9) / float64(473560),
"persistentvolumeclaim.name": "pvc-demo",
}

for k, v := range testCases {
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