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feat(metrics-server): add `dnsConfig` support 

Signed-off-by: Matthew Kevin Amadeus <mkamadeus.mka@gmail.com>
This commit is contained in:
Matthew Kevin Amadeus 2025-07-25 12:36:26 +07:00
parent a3087c4624
commit 68ae70160c
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3 changed files with 15 additions and 1 deletions
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3
keda/README.md
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@ -87,6 +87,7 @@ their default values.
| `global.image.registry` | string | `nil` | Global image registry of KEDA components |
| `grpcTLSCertsSecret` | string | `""` | Set this if you are using an external scaler and want to communicate over TLS (recommended). This variable holds the name of the secret that will be mounted to the /grpccerts path on the Pod |
| `hashiCorpVaultTLS` | string | `""` | Set this if you are using HashiCorp Vault and want to communicate over TLS (recommended). This variable holds the name of the secret that will be mounted to the /vault path on the Pod |
| `hostAliases` | list | `[]` | HostAliases for pod networking ([docs](https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/)) |
| `http.keepAlive.enabled` | bool | `true` | Enable HTTP connection keep alive |
| `http.minTlsVersion` | string | `"TLS12"` | The minimum TLS version to use for all scalers that use raw HTTP clients (some scalers use SDKs to access target services. These have built-in HTTP clients, and this value does not necessarily apply to them) |
| `http.timeout` | int | `3000` | The default HTTP timeout to use for all scalers that use raw HTTP clients (some scalers use SDKs to access target services. These have built-in HTTP clients, and the timeout does not necessarily apply to them) |
@ -116,7 +117,6 @@ their default values.
| `rbac.scaledRefKinds` | list | `[{"apiGroup":"*","kind":"*"}]` | List of custom resources that support the `scale` subresource and can be referenced by `scaledobject.spec.scaleTargetRef`. The feature needs to be also enabled by `enabledCustomScaledRefKinds`. If left empty, RBAC for `apiGroups: *` and `resources: *, */scale` will be created note: Deployments and StatefulSets are supported out of the box |
| `securityContext` | object | [See below](#KEDA-is-secure-by-default) | [Security context] for all containers |
| `tolerations` | list | `[]` | Tolerations for pod scheduling ([docs](https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/)) |
| `hostAliases` | list | `[]` | HostAliases for pod networking ([docs](https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/)) |
| `watchNamespace` | string | `""` | Defines Kubernetes namespaces to watch to scale their workloads. Default watches all namespaces |
### Operator
@ -171,6 +171,7 @@ their default values.
| `logging.metricServer.stderrthreshold` | string | `"ERROR"` | Logging stderrthreshold for Metrics Server allowed values: 'DEBUG','INFO','WARN','ERROR','ALERT','EMERG' |
| `metricsServer.affinity` | object | `{}` | [Affinity] for pod scheduling for Metrics API Server. Takes precedence over the `affinity` field |
| `metricsServer.disableCompression` | bool | `true` | Disable response compression for k8s restAPI in client-go. Disabling compression simply means that turns off the process of making data smaller for K8s restAPI in client-go for faster transmission. |
| `metricsServer.dnsConfig` | object | `{}` | [DNS config] for KEDA metrics server pod |
| `metricsServer.dnsPolicy` | string | `"ClusterFirst"` | Defined the DNS policy for the metric server |
| `metricsServer.livenessProbe` | object | `{"failureThreshold":3,"initialDelaySeconds":5,"periodSeconds":10,"successThreshold":1,"timeoutSeconds":1}` | Liveness probes for Metrics API Server ([docs](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/)) |
| `metricsServer.readinessProbe` | object | `{"failureThreshold":3,"initialDelaySeconds":5,"periodSeconds":3,"successThreshold":1,"timeoutSeconds":1}` | Readiness probes for Metrics API Server ([docs](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-readiness-probes)) |

4
keda/templates/metrics-server/deployment.yaml
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@ -184,6 +184,10 @@ spec:
{{- toYaml .Values.volumes.metricsApiServer.extraVolumes | nindent 6 }}
{{- end }}
dnsPolicy: {{ .Values.metricsServer.dnsPolicy }}
{{- if .Values.metricsServer.dnsConfig }}
dnsConfig:
{{- toYaml .Values.metricsServer.dnsConfig | nindent 8 }}
{{- end }}
hostNetwork: {{ .Values.metricsServer.useHostNetwork }}
nodeSelector:
kubernetes.io/os: linux

9
keda/values.yaml
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@ -134,6 +134,15 @@ metricsServer:
# use ClusterFirstWithHostNet if `useHostNetwork: true` https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy
# -- Defined the DNS policy for the metric server
dnsPolicy: ClusterFirst
# -- [DNS config] for KEDA metrics server pod
dnsConfig: {}
# nameservers:
# - 8.8.8.8
# searches:
# - metrics.example.com
# options:
# - name: ndots
# value: "3"
# -- Enable metric server to use host network
useHostNetwork: false
# -- [Affinity] for pod scheduling for Metrics API Server. Takes precedence over the `affinity` field