Scaffold kea-operator: CRDs, controllers, config rendering, REST API, CI
Replace the ISC dhcpd PXE-boot VM with a Kea DHCP Kubernetes operator, modelled on bind-operator. The operator renders kea-dhcp4 config from CRs and runs an HA pair of kea-dhcp4 + kea-ctrl-agent servers behind an anycast Service. - add KeaCluster/KeaSubnet/KeaClientClass/KeaAPI CRDs (group kea.unkin.net) - render deterministic kea-dhcp4.conf + kea-ctrl-agent.conf into a ConfigMap and roll the StatefulSet via a config-hash annotation; best-effort hot-reload via the kea-ctrl-agent REST channel - run HA hot-standby (memfile leases) with stable per-peer DNS identity from a StatefulSet; expose an anycast LoadBalancer Service for PureLB - represent the full legacy dhcpd config: 198.18.13-17.0/24 pools, pool-less 198.18.25.0/24, and the Legacy/UEFI-64 PXE arch classes (option 93) - add the KeaAPI-spawned REST service: Terraform-friendly CRUD over subnet and client-class CRs (stable IDs, PUT upsert, 404 drift, bearer-token auth) - add Makefile (patch/minor/major tag targets), distroless operator/api images, an AlmaLinux+EPEL kea workload image, and woodpecker CI with k8s resources + serviceAccountName on every step - unit tests for config rendering, controller reconcile/config-hash, and the API Claude-Session: https://claude.ai/code/session_01JUoARVdmhxKQHyyyp1pxeT
This commit is contained in:
unkinben
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---
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apiVersion: apiextensions.k8s.io/v1
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kind: CustomResourceDefinition
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metadata:
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annotations:
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controller-gen.kubebuilder.io/version: v0.17.3
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name: keaclientclasses.kea.unkin.net
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spec:
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group: kea.unkin.net
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names:
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kind: KeaClientClass
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listKind: KeaClientClassList
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plural: keaclientclasses
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shortNames:
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- kcc
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singular: keaclientclass
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scope: Namespaced
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versions:
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- additionalPrinterColumns:
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- jsonPath: .spec.clusterRef
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name: Cluster
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type: string
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- jsonPath: .spec.bootFileName
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name: BootFile
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type: string
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- jsonPath: .status.phase
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name: Phase
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type: string
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name: v1alpha1
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schema:
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openAPIV3Schema:
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description: KeaClientClass is a PXE boot class matched on the client architecture.
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properties:
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apiVersion:
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description: |-
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APIVersion defines the versioned schema of this representation of an object.
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Servers should convert recognized schemas to the latest internal value, and
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may reject unrecognized values.
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More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
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type: string
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kind:
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description: |-
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Kind is a string value representing the REST resource this object represents.
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Servers may infer this from the endpoint the client submits requests to.
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Cannot be updated.
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In CamelCase.
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More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
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type: string
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metadata:
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type: object
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spec:
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description: |-
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KeaClientClassSpec defines a PXE boot client-class, typically matching the
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DHCP client architecture option (code 93).
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properties:
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archHex:
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description: |-
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ArchHex is a convenience list of client-architecture values (option 93),
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e.g. ["0x0000"] or ["0x0007","0x0009"]. Rendered into a Test expression
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of the form: option[93].hex == 0x0007 or option[93].hex == 0x0009.
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items:
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type: string
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type: array
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bootFileName:
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description: BootFileName handed to matching clients (option 67 /
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boot-file-name).
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type: string
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clusterRef:
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description: |-
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ClusterRef selects the owning KeaCluster by name. Empty means every
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KeaCluster in the namespace.
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type: string
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nextServer:
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description: NextServer overrides siaddr for matching clients.
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type: string
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optionData:
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description: OptionData carries additional options set for matching
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clients.
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items:
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description: OptionData is a rendered DHCPv4 option value (subnet-
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or class-scoped).
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properties:
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code:
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description: Code of the option (alternative to Name).
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type: integer
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csvFormat:
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description: CSVFormat controls whether Data is parsed as CSV
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(default true in Kea).
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type: boolean
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data:
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description: Data is the option value(s), comma-separated per
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Kea convention.
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type: string
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name:
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description: Name of the option, e.g. "routers", "domain-name-servers".
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type: string
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space:
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description: Space defaults to "dhcp4".
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type: string
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required:
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- data
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type: object
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type: array
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serverHostname:
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description: ServerHostname (sname) for matching clients.
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type: string
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test:
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description: |-
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Test is a raw Kea class-match expression. When empty it is generated
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from ArchHex.
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type: string
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type: object
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status:
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description: KeaClientClassStatus captures observed state.
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properties:
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conditions:
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items:
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description: Condition contains details for one aspect of the current
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state of this API Resource.
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properties:
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lastTransitionTime:
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description: |-
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lastTransitionTime is the last time the condition transitioned from one status to another.
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This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
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format: date-time
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type: string
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message:
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description: |-
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message is a human readable message indicating details about the transition.
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This may be an empty string.
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maxLength: 32768
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type: string
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observedGeneration:
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description: |-
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observedGeneration represents the .metadata.generation that the condition was set based upon.
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For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
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with respect to the current state of the instance.
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format: int64
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minimum: 0
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type: integer
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reason:
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description: |-
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reason contains a programmatic identifier indicating the reason for the condition's last transition.
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Producers of specific condition types may define expected values and meanings for this field,
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and whether the values are considered a guaranteed API.
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The value should be a CamelCase string.
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This field may not be empty.
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maxLength: 1024
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minLength: 1
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pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
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type: string
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status:
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description: status of the condition, one of True, False, Unknown.
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enum:
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- "True"
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- "False"
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- Unknown
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type: string
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type:
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description: type of condition in CamelCase or in foo.example.com/CamelCase.
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maxLength: 316
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pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
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type: string
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required:
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- lastTransitionTime
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- message
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- reason
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- status
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- type
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type: object
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type: array
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x-kubernetes-list-map-keys:
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- type
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x-kubernetes-list-type: map
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observedGeneration:
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format: int64
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type: integer
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phase:
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type: string
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type: object
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type: object
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served: true
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storage: true
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subresources:
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status: {}
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---
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apiVersion: apiextensions.k8s.io/v1
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kind: CustomResourceDefinition
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metadata:
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annotations:
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controller-gen.kubebuilder.io/version: v0.17.3
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name: keasubnets.kea.unkin.net
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spec:
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group: kea.unkin.net
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names:
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kind: KeaSubnet
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listKind: KeaSubnetList
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plural: keasubnets
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shortNames:
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- ksn
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singular: keasubnet
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scope: Namespaced
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versions:
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- additionalPrinterColumns:
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- jsonPath: .spec.clusterRef
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name: Cluster
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type: string
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- jsonPath: .spec.subnet
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name: Subnet
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type: string
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- jsonPath: .status.phase
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name: Phase
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type: string
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name: v1alpha1
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schema:
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openAPIV3Schema:
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description: KeaSubnet is one DHCPv4 subnet declaration referenced to a KeaCluster.
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properties:
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apiVersion:
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description: |-
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APIVersion defines the versioned schema of this representation of an object.
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Servers should convert recognized schemas to the latest internal value, and
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may reject unrecognized values.
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More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
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type: string
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kind:
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description: |-
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Kind is a string value representing the REST resource this object represents.
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Servers may infer this from the endpoint the client submits requests to.
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Cannot be updated.
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In CamelCase.
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More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
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type: string
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metadata:
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type: object
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spec:
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description: KeaSubnetSpec defines a single DHCPv4 subnet served by a
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KeaCluster.
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properties:
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bootFileName:
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description: BootFileName sets the PXE boot file for this subnet (overridden
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by class).
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type: string
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clientClasses:
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description: ClientClasses restricts the subnet to the listed client
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classes.
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items:
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type: string
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type: array
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clusterRef:
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description: |-
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ClusterRef selects the owning KeaCluster by name. Empty means every
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KeaCluster in the namespace.
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type: string
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dnsServers:
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description: DNSServers is the domain-name-servers option.
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items:
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type: string
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type: array
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domainName:
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description: DomainName is the per-subnet domain-name option.
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type: string
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id:
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description: |-
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ID is the stable Kea subnet id. When zero the operator assigns one
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deterministically from the sorted set of subnets.
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type: integer
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nextServer:
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description: NextServer is the TFTP server address for PXE (siaddr
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/ next-server).
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type: string
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optionData:
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description: OptionData carries any additional option values for the
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subnet.
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items:
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description: OptionData is a rendered DHCPv4 option value (subnet-
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or class-scoped).
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properties:
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code:
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description: Code of the option (alternative to Name).
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type: integer
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csvFormat:
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description: CSVFormat controls whether Data is parsed as CSV
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(default true in Kea).
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type: boolean
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data:
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description: Data is the option value(s), comma-separated per
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Kea convention.
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type: string
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name:
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description: Name of the option, e.g. "routers", "domain-name-servers".
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type: string
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space:
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description: Space defaults to "dhcp4".
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type: string
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required:
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- data
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type: object
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type: array
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pools:
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description: |-
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Pools are dynamic ranges, e.g. "198.18.13.200 - 198.18.13.220". A subnet
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with no pool is still declared so relayed requests on that network are
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serviced (matching, option delivery) without dynamic allocation.
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items:
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type: string
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type: array
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routers:
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description: Routers is the default-gateway list (routers option).
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items:
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type: string
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type: array
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subnet:
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description: Subnet is the CIDR, e.g. "198.18.13.0/24".
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type: string
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validLifetime:
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description: ValidLifetime overrides the cluster default lease time
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for this subnet.
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type: integer
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required:
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- subnet
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type: object
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status:
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description: KeaSubnetStatus captures observed state.
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properties:
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assignedID:
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description: AssignedID is the subnet id that was rendered into kea
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config.
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type: integer
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conditions:
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items:
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description: Condition contains details for one aspect of the current
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state of this API Resource.
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properties:
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lastTransitionTime:
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description: |-
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lastTransitionTime is the last time the condition transitioned from one status to another.
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This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
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format: date-time
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type: string
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message:
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description: |-
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message is a human readable message indicating details about the transition.
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This may be an empty string.
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maxLength: 32768
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type: string
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observedGeneration:
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description: |-
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observedGeneration represents the .metadata.generation that the condition was set based upon.
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For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
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with respect to the current state of the instance.
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format: int64
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minimum: 0
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type: integer
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reason:
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description: |-
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reason contains a programmatic identifier indicating the reason for the condition's last transition.
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Producers of specific condition types may define expected values and meanings for this field,
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and whether the values are considered a guaranteed API.
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The value should be a CamelCase string.
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This field may not be empty.
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maxLength: 1024
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minLength: 1
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pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
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type: string
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status:
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description: status of the condition, one of True, False, Unknown.
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enum:
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- "True"
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- "False"
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- Unknown
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type: string
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type:
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description: type of condition in CamelCase or in foo.example.com/CamelCase.
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maxLength: 316
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pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
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type: string
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required:
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- lastTransitionTime
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- message
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- reason
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- status
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- type
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type: object
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type: array
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x-kubernetes-list-map-keys:
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||||
- type
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x-kubernetes-list-type: map
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observedGeneration:
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format: int64
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type: integer
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phase:
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type: string
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type: object
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type: object
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served: true
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storage: true
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subresources:
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status: {}
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File diff suppressed because it is too large
Load Diff
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