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feat!: truncate fullname after 22 characters
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@aboguszewski-sumo
aboguszewski-sumo committed Sep 7, 2023
1 parent 8d8a3b9 commit 76410fa
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Showing 8 changed files with 21 additions and 32 deletions.
1 change: 1 addition & 0 deletions .changelog/3248.breaking.txt
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@@ -0,0 +1 @@
feat!: truncate fullname after 22 characters
2 changes: 1 addition & 1 deletion deploy/helm/sumologic/README.md
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Expand Up @@ -23,7 +23,7 @@ The following table lists the configurable parameters of the Sumo Logic chart an
| Parameter | Description | Default |
| ------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `nameOverride` | Used to override the Chart name. | `Nil` |
| `fullnameOverride` | Used to override the chart's full name. | `Nil` |
| `fullnameOverride` | Used to override the chart's full name. Names longer than 22 characters will be truncated. | `Nil` |
| `namespaceOverride` | Used to override the chart's default target namepace. | `Nil` |
| `sumologic.setupEnabled` | If enabled, a pre-install hook will create Collector and Sources in Sumo Logic. | `true` |
| `sumologic.cleanupEnabled` | If enabled, a pre-delete hook will destroy Kubernetes secret and Sumo Logic Collector. | `false` |
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7 changes: 4 additions & 3 deletions deploy/helm/sumologic/templates/_helpers/_common.tpl
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Expand Up @@ -7,14 +7,15 @@ Expand the name of the chart.

{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
We truncate at 22 chars because some Kubernetes name fields are limited to 63 characters (by the DNS naming spec).
In particular, some statefulsets will have too long names if the name is longer than 22 characters.
*/}}
{{- define "sumologic.fullname" -}}
{{- if .Values.fullnameOverride }}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
{{- .Values.fullnameOverride | trunc 22 | trimSuffix "-" }}
{{- else }}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
{{- printf "%s-%s" .Release.Name $name | trunc 22 | trimSuffix "-" }}
{{- end -}}
{{- end -}}

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8 changes: 7 additions & 1 deletion docs/v4-migration-doc.md
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Expand Up @@ -11,7 +11,8 @@
- [Running the helm upgrade](#running-the-helm-upgrade)
- [Known issues](#known-issues)
- [Full list of changes](#full-list-of-changes)
<!-- /TOC -->
- [Truncating full name to 22 characters](#truncating-full-name-to-22-characters)
<!-- /TOC -->

Based on feedback from our users, we will be introducing several changes to the Sumo Logic Kubernetes Collection solution.

Expand Down Expand Up @@ -67,3 +68,8 @@ require additional action.
## Full list of changes

:construction:

### Truncating full name to 22 characters

Some Kubernetes objects, for example statefulsets, have a tight (63 characters) limit for their names. Because of that, we truncate the
prefix that is attached to the names. In particular, the value under key `fullnameOverride` will be truncated to 22 characters.
25 changes: 0 additions & 25 deletions tests/helm/common_test.go
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Expand Up @@ -172,31 +172,6 @@ func TestNameAndLabelLength(t *testing.T) {
}
}

func TestReleaseNameTooLong(t *testing.T) {
valuesFilePath := path.Join(testDataDirectory, "everything-enabled.yaml")
releaseName := strings.Repeat("a", maxHelmReleaseNameLength+1)
_, err := RenderTemplateE(
t,
&helm.Options{
ValuesFiles: []string{valuesFilePath},
SetStrValues: map[string]string{
"sumologic.accessId": "accessId",
"sumologic.accessKey": "accessKey",
},
Logger: logger.Discard, // the log output is noisy and doesn't help much
},
chartDirectory,
releaseName,
[]string{},
true,
"--namespace",
defaultNamespace,
)
require.NoError(t, err)
// we can't check whether NOTES are rendered correctly due to https://github.com/helm/helm/issues/6901
// TODO: Add an error check here after we start enforcing the limit: https://github.com/SumoLogic/sumologic-kubernetes-collection/issues/3057
}

// check the built-in labels added to all K8s objects created by the chart
func checkBuiltinLabels(t *testing.T, object metav1.Object, chartVersion string) {
labels := object.GetLabels()
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2 changes: 1 addition & 1 deletion tests/helm/const.go
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Expand Up @@ -12,7 +12,7 @@ const (
otelConfigFileName = "config.yaml"
otelImageFIPSSuffix = "-fips"
otelContainerName = "otelcol"
maxHelmReleaseNameLength = 19 // Helm allows up to 53, this is our own limit
maxHelmReleaseNameLength = 22 // Helm allows up to 53, but for a name longer than 22 some statefulset names will be too long
k8sMaxNameLength = 253 // see https://kubernetes.io/docs/concepts/overview/working-with-objects/names/
k8sMaxLabelLength = 63 // see https://kubernetes.io/docs/concepts/overview/working-with-objects/names/
)
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2 changes: 2 additions & 0 deletions tests/helm/testdata/everything-enabled.yaml
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Expand Up @@ -2,6 +2,8 @@ sumologic:
logs:
collector:
allowSideBySide: true
otelcloudwatch:
enabled: true

metadata:
logs:
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6 changes: 5 additions & 1 deletion tests/integration/internal/strings/strings.go
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Expand Up @@ -8,6 +8,10 @@ import (
"time"
)

const (
maxReleaseNameLength = 12
)

func NameFromT(t *testing.T) string {
return strings.ReplaceAll(strings.ToLower(t.Name()), "_", "-")
}
Expand All @@ -29,5 +33,5 @@ func ValueFileFromT(t *testing.T) string {
func ReleaseNameFromT(t *testing.T) string {
h := fnv.New32a()
h.Write([]byte(t.Name()))
return fmt.Sprintf("rel-%d", h.Sum32())
return fmt.Sprintf("rel-%d", h.Sum32())[:maxReleaseNameLength]
}

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