From c745c310b552ac2b0eaaf4dcfdf907924e79c561 Mon Sep 17 00:00:00 2001 From: kvaps Date: Tue, 14 Apr 2020 17:53:12 +0200 Subject: [PATCH] Import dnsmasq-controller --- .gitignore | 24 + Dockerfile | 24 + Makefile | 80 +++ PROJECT | 7 + README.md | 64 +++ api/v1alpha1/dnsmasqoptionset_types.go | 65 +++ api/v1alpha1/groupversion_info.go | 36 ++ api/v1alpha1/zz_generated.deepcopy.go | 134 +++++ config/certmanager/certificate.yaml | 26 + config/certmanager/kustomization.yaml | 5 + config/certmanager/kustomizeconfig.yaml | 16 + .../dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml | 108 +++++ config/crd/kustomization.yaml | 21 + config/crd/kustomizeconfig.yaml | 17 + .../cainjection_in_dnsmasqoptionsets.yaml | 8 + .../patches/webhook_in_dnsmasqoptionsets.yaml | 17 + config/default/kustomization.yaml | 70 +++ config/default/manager_auth_proxy_patch.yaml | 25 + config/default/manager_webhook_patch.yaml | 23 + config/default/webhookcainjection_patch.yaml | 15 + config/manager/kustomization.yaml | 2 + config/manager/manager.yaml | 39 ++ config/prometheus/kustomization.yaml | 2 + config/prometheus/monitor.yaml | 16 + .../rbac/auth_proxy_client_clusterrole.yaml | 7 + config/rbac/auth_proxy_role.yaml | 13 + config/rbac/auth_proxy_role_binding.yaml | 12 + config/rbac/auth_proxy_service.yaml | 14 + config/rbac/dnsmasqoptionset_editor_role.yaml | 24 + config/rbac/dnsmasqoptionset_viewer_role.yaml | 20 + config/rbac/kustomization.yaml | 12 + config/rbac/leader_election_role.yaml | 32 ++ config/rbac/leader_election_role_binding.yaml | 12 + config/rbac/role.yaml | 28 ++ config/rbac/role_binding.yaml | 12 + .../dnsmasq_v1alpha1_dnsmasqoptionset.yaml | 11 + config/webhook/kustomization.yaml | 6 + config/webhook/kustomizeconfig.yaml | 25 + config/webhook/manifests.yaml | 0 config/webhook/service.yaml | 12 + controllers/dnsmasqoptionset_controller.go | 160 ++++++ controllers/suite_test.go | 81 ++++ go.mod | 13 + go.sum | 456 ++++++++++++++++++ hack/boilerplate.go.txt | 15 + main.go | 127 +++++ pkg/conf/conf.go | 26 + pkg/server/server.go | 92 ++++ 48 files changed, 2054 insertions(+) create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 Makefile create mode 100644 PROJECT create mode 100644 README.md create mode 100644 api/v1alpha1/dnsmasqoptionset_types.go create mode 100644 api/v1alpha1/groupversion_info.go create mode 100644 api/v1alpha1/zz_generated.deepcopy.go create mode 100644 config/certmanager/certificate.yaml create mode 100644 config/certmanager/kustomization.yaml create mode 100644 config/certmanager/kustomizeconfig.yaml create mode 100644 config/crd/bases/dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml create mode 100644 config/crd/kustomization.yaml create mode 100644 config/crd/kustomizeconfig.yaml create mode 100644 config/crd/patches/cainjection_in_dnsmasqoptionsets.yaml create mode 100644 config/crd/patches/webhook_in_dnsmasqoptionsets.yaml create mode 100644 config/default/kustomization.yaml create mode 100644 config/default/manager_auth_proxy_patch.yaml create mode 100644 config/default/manager_webhook_patch.yaml create mode 100644 config/default/webhookcainjection_patch.yaml create mode 100644 config/manager/kustomization.yaml create mode 100644 config/manager/manager.yaml create mode 100644 config/prometheus/kustomization.yaml create mode 100644 config/prometheus/monitor.yaml create mode 100644 config/rbac/auth_proxy_client_clusterrole.yaml create mode 100644 config/rbac/auth_proxy_role.yaml create mode 100644 config/rbac/auth_proxy_role_binding.yaml create mode 100644 config/rbac/auth_proxy_service.yaml create mode 100644 config/rbac/dnsmasqoptionset_editor_role.yaml create mode 100644 config/rbac/dnsmasqoptionset_viewer_role.yaml create mode 100644 config/rbac/kustomization.yaml create mode 100644 config/rbac/leader_election_role.yaml create mode 100644 config/rbac/leader_election_role_binding.yaml create mode 100644 config/rbac/role.yaml create mode 100644 config/rbac/role_binding.yaml create mode 100644 config/samples/dnsmasq_v1alpha1_dnsmasqoptionset.yaml create mode 100644 config/webhook/kustomization.yaml create mode 100644 config/webhook/kustomizeconfig.yaml create mode 100644 config/webhook/manifests.yaml create mode 100644 config/webhook/service.yaml create mode 100644 controllers/dnsmasqoptionset_controller.go create mode 100644 controllers/suite_test.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 hack/boilerplate.go.txt create mode 100644 main.go create mode 100644 pkg/conf/conf.go create mode 100644 pkg/server/server.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d97ffc5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,24 @@ + +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib +bin + +# Test binary, build with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Kubernetes Generated files - skip generated files, except for vendored files + +!vendor/**/zz_generated.* + +# editor and IDE paraphernalia +.idea +*.swp +*.swo +*~ diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..afb981f --- /dev/null +++ b/Dockerfile @@ -0,0 +1,24 @@ +# Build the manager binary +FROM golang:1.13 as builder + +WORKDIR /workspace +# Copy the Go Modules manifests +COPY go.mod go.mod +COPY go.sum go.sum +# cache deps before building and copying source so that we don't need to re-download as much +# and so that source changes don't invalidate our downloaded layer +RUN go mod download + +# Copy the go source +COPY main.go main.go +COPY api/ api/ +COPY controllers/ controllers/ + +# Build +RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go + +FROM alpine:3.11 +RUN apk add --no-cache dnsmasq +COPY --from=builder /workspace/manager /dnsmasq-controller + +ENTRYPOINT ["/dnsmasq-controller"] diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..5da22b5 --- /dev/null +++ b/Makefile @@ -0,0 +1,80 @@ + +# Image URL to use all building/pushing image targets +IMG ?= controller:latest +# Produce CRDs that work back to Kubernetes 1.11 (no version conversion) +CRD_OPTIONS ?= "crd:trivialVersions=true" + +# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set) +ifeq (,$(shell go env GOBIN)) +GOBIN=$(shell go env GOPATH)/bin +else +GOBIN=$(shell go env GOBIN) +endif + +all: manager + +# Run tests +test: generate fmt vet manifests + go test ./... -coverprofile cover.out + +# Build manager binary +manager: generate fmt vet + go build -o bin/manager main.go + +# Run against the configured Kubernetes cluster in ~/.kube/config +run: generate fmt vet manifests + go run ./main.go + +# Install CRDs into a cluster +install: manifests + kustomize build config/crd | kubectl apply -f - + +# Uninstall CRDs from a cluster +uninstall: manifests + kustomize build config/crd | kubectl delete -f - + +# Deploy controller in the configured Kubernetes cluster in ~/.kube/config +deploy: manifests + cd config/manager && kustomize edit set image controller=${IMG} + kustomize build config/default | kubectl apply -f - + +# Generate manifests e.g. CRD, RBAC etc. +manifests: controller-gen + $(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases + +# Run go fmt against code +fmt: + go fmt ./... + +# Run go vet against code +vet: + go vet ./... + +# Generate code +generate: controller-gen + $(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..." + +# Build the docker image +docker-build: test + docker build . -t ${IMG} + +# Push the docker image +docker-push: + docker push ${IMG} + +# find or download controller-gen +# download controller-gen if necessary +controller-gen: +ifeq (, $(shell which controller-gen)) + @{ \ + set -e ;\ + CONTROLLER_GEN_TMP_DIR=$$(mktemp -d) ;\ + cd $$CONTROLLER_GEN_TMP_DIR ;\ + go mod init tmp ;\ + go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.2.5 ;\ + rm -rf $$CONTROLLER_GEN_TMP_DIR ;\ + } +CONTROLLER_GEN=$(GOBIN)/controller-gen +else +CONTROLLER_GEN=$(shell which controller-gen) +endif diff --git a/PROJECT b/PROJECT new file mode 100644 index 0000000..d056872 --- /dev/null +++ b/PROJECT @@ -0,0 +1,7 @@ +domain: kvaps.cf +repo: github.com/kvaps/dnsmasq-controller +resources: +- group: dnsmasq + kind: DnsmasqOptionSet + version: v1alpha1 +version: "2" diff --git a/README.md b/README.md new file mode 100644 index 0000000..135cc10 --- /dev/null +++ b/README.md @@ -0,0 +1,64 @@ +# Dnsmasq-controller + +A Dnsmasq-controller for Kubernetes, implemented in go using [kubebuilder](https://kubebuilder.io/). + +## Status + +![GitHub](https://img.shields.io/badge/status-alpha-blue?style=for-the-badge) +![GitHub](https://img.shields.io/github/license/kristofferahl/healthchecksio-operator?style=for-the-badge) +![GitHub go.mod Go version](https://img.shields.io/github/go-mod/go-version/kristofferahl/healthchecksio-operator?style=for-the-badge) + +## Supported resources +- DnsmasqOptionSet + +## Example +```yaml +--- +apiVersion: dnsmasq.kvaps.cf/v1alpha1 +kind: DnsmasqOptionSet +metadata: + name: node1 +spec: + controller: "" + options: + - key: host-record + value: node1,10.9.8.7 + - key: dhcp-host + value: set:ltsp1,a0:1d:48:b5:ae:a8,a0:1d:48:b5:ae:a9,id:*,10.9.8.7,node1,infinite +``` + +### Configuration + +| Flag | Type | Required | Description | +|---------------------------|--------|----------|-----------------------------------------------------------------------------------------------------------------------------------------| +| `-cleanup` | bool | false | Cleanup Dnsmasq config directory before start. | +| `-conf-dir` | string | false | Dnsmasq config directory for write configuration to. (default "/etc/dnsmasq.d") | +| `-controller` | string | false | Name of the controller this controller satisfies. (default "") | +| `-development` | bool | false | Run the controller in development mode. | +| `-enable-leader-election` | bool | false | Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager. | +| `-kubeconfig` | string | false | Paths to a kubeconfig. Only required if out-of-cluster. | +| `-log-level` | string | false | The log level used by the operator. (default "info") | +| `-metrics-addr` | string | false | The address the metric endpoint binds to. (default ":8080") | +| `-sync-delay` | int | false | Time in seconds to syncronise Dnsmasq configuration. (default 1) | +| `-watch-namespace` | string | false | Namespace the controller watches for updates to Kubernetes objects. All namespaces are watched if this parameter is left empty. | +| `--` | array | false | Additional command line arguments for Dnsmasq may be specified after `--` (read [dnsmasq-man] for more details) | + +[dnsmasq-man]: http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html + +## Development + +### Pre-requisites +- [Go](https://golang.org/) 1.13 or later +- [Kubebuilder](https://kubebuilder.io/) 2.3.1 +- [Kubernetes](https://kubernetes.io/) cluster + +### Getting started +```bash +make install +make run +``` + +### Running tests +```bash +make test +``` diff --git a/api/v1alpha1/dnsmasqoptionset_types.go b/api/v1alpha1/dnsmasqoptionset_types.go new file mode 100644 index 0000000..820f7ee --- /dev/null +++ b/api/v1alpha1/dnsmasqoptionset_types.go @@ -0,0 +1,65 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package v1alpha1 + +import ( + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" +) + +// DnsmasqOptionSetSpecOption defines the desired state of DnsmasqOptionSetSpec +type DnsmasqOptionSetSpecOption struct { + // +kubebuilder:validation:Enum=dhcp-range;dhcp-host;dhcp-userclass;dhcp-circuitid;dhcp-remoteid;dhcp-subscrid;dhcp-ignore;dhcp-broadcast;mx-host;dhcp-boot;dhcp-option;dhcp-option-force;server;rev-server;local;domain;dhcp-vendorclass;alias;dhcp-vendorclass;srv-host;txt-record;ptr-record;bootp-dynamic;dhcp-mac;dhcp-ignore-names;rebind-domain-ok;dhcp-match;dhcp-name-match;naptr-record;dhcp-generate-names;cname;pxe-service;add-mac;dhcp-duid;host-record;caa-record;dns-rr;auth-zone;synth-domain + Key string `json:"key,omitempty"` + Value string `json:"value,omitempty"` +} + +// DnsmasqOptionSetSpec defines the desired state of DnsmasqOptionSet +type DnsmasqOptionSetSpec struct { + Controller string `json:"controller,omitempty"` + Options []DnsmasqOptionSetSpecOption `json:"options,omitempty"` +} + +// DnsmasqOptionSetStatus defines the observed state of DnsmasqOptionSet +type DnsmasqOptionSetStatus struct { + // INSERT ADDITIONAL STATUS FIELD - define observed state of cluster + // Important: Run "make" to regenerate code after modifying this file +} + +// +kubebuilder:resource:shortName=dnsmasqopt;dnsmasqopts +// +kubebuilder:object:root=true + +// DnsmasqOptionSet is the Schema for the dnsmasqoptionsets API +type DnsmasqOptionSet struct { + metav1.TypeMeta `json:",inline"` + metav1.ObjectMeta `json:"metadata,omitempty"` + + Spec DnsmasqOptionSetSpec `json:"spec,omitempty"` + Status DnsmasqOptionSetStatus `json:"status,omitempty"` +} + +// +kubebuilder:object:root=true + +// DnsmasqOptionSetList contains a list of DnsmasqOptionSet +type DnsmasqOptionSetList struct { + metav1.TypeMeta `json:",inline"` + metav1.ListMeta `json:"metadata,omitempty"` + Items []DnsmasqOptionSet `json:"items"` +} + +func init() { + SchemeBuilder.Register(&DnsmasqOptionSet{}, &DnsmasqOptionSetList{}) +} diff --git a/api/v1alpha1/groupversion_info.go b/api/v1alpha1/groupversion_info.go new file mode 100644 index 0000000..a988b75 --- /dev/null +++ b/api/v1alpha1/groupversion_info.go @@ -0,0 +1,36 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// Package v1alpha1 contains API Schema definitions for the dnsmasq v1alpha1 API group +// +kubebuilder:object:generate=true +// +groupName=dnsmasq.kvaps.cf +package v1alpha1 + +import ( + "k8s.io/apimachinery/pkg/runtime/schema" + "sigs.k8s.io/controller-runtime/pkg/scheme" +) + +var ( + // GroupVersion is group version used to register these objects + GroupVersion = schema.GroupVersion{Group: "dnsmasq.kvaps.cf", Version: "v1alpha1"} + + // SchemeBuilder is used to add go types to the GroupVersionKind scheme + SchemeBuilder = &scheme.Builder{GroupVersion: GroupVersion} + + // AddToScheme adds the types in this group-version to the given scheme. + AddToScheme = SchemeBuilder.AddToScheme +) diff --git a/api/v1alpha1/zz_generated.deepcopy.go b/api/v1alpha1/zz_generated.deepcopy.go new file mode 100644 index 0000000..0058b76 --- /dev/null +++ b/api/v1alpha1/zz_generated.deepcopy.go @@ -0,0 +1,134 @@ +// +build !ignore_autogenerated + +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// Code generated by controller-gen. DO NOT EDIT. + +package v1alpha1 + +import ( + runtime "k8s.io/apimachinery/pkg/runtime" +) + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *DnsmasqOptionSet) DeepCopyInto(out *DnsmasqOptionSet) { + *out = *in + out.TypeMeta = in.TypeMeta + in.ObjectMeta.DeepCopyInto(&out.ObjectMeta) + in.Spec.DeepCopyInto(&out.Spec) + out.Status = in.Status +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new DnsmasqOptionSet. +func (in *DnsmasqOptionSet) DeepCopy() *DnsmasqOptionSet { + if in == nil { + return nil + } + out := new(DnsmasqOptionSet) + in.DeepCopyInto(out) + return out +} + +// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object. +func (in *DnsmasqOptionSet) DeepCopyObject() runtime.Object { + if c := in.DeepCopy(); c != nil { + return c + } + return nil +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *DnsmasqOptionSetList) DeepCopyInto(out *DnsmasqOptionSetList) { + *out = *in + out.TypeMeta = in.TypeMeta + in.ListMeta.DeepCopyInto(&out.ListMeta) + if in.Items != nil { + in, out := &in.Items, &out.Items + *out = make([]DnsmasqOptionSet, len(*in)) + for i := range *in { + (*in)[i].DeepCopyInto(&(*out)[i]) + } + } +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new DnsmasqOptionSetList. +func (in *DnsmasqOptionSetList) DeepCopy() *DnsmasqOptionSetList { + if in == nil { + return nil + } + out := new(DnsmasqOptionSetList) + in.DeepCopyInto(out) + return out +} + +// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object. +func (in *DnsmasqOptionSetList) DeepCopyObject() runtime.Object { + if c := in.DeepCopy(); c != nil { + return c + } + return nil +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *DnsmasqOptionSetSpec) DeepCopyInto(out *DnsmasqOptionSetSpec) { + *out = *in + if in.Options != nil { + in, out := &in.Options, &out.Options + *out = make([]DnsmasqOptionSetSpecOption, len(*in)) + copy(*out, *in) + } +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new DnsmasqOptionSetSpec. +func (in *DnsmasqOptionSetSpec) DeepCopy() *DnsmasqOptionSetSpec { + if in == nil { + return nil + } + out := new(DnsmasqOptionSetSpec) + in.DeepCopyInto(out) + return out +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *DnsmasqOptionSetSpecOption) DeepCopyInto(out *DnsmasqOptionSetSpecOption) { + *out = *in +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new DnsmasqOptionSetSpecOption. +func (in *DnsmasqOptionSetSpecOption) DeepCopy() *DnsmasqOptionSetSpecOption { + if in == nil { + return nil + } + out := new(DnsmasqOptionSetSpecOption) + in.DeepCopyInto(out) + return out +} + +// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil. +func (in *DnsmasqOptionSetStatus) DeepCopyInto(out *DnsmasqOptionSetStatus) { + *out = *in +} + +// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new DnsmasqOptionSetStatus. +func (in *DnsmasqOptionSetStatus) DeepCopy() *DnsmasqOptionSetStatus { + if in == nil { + return nil + } + out := new(DnsmasqOptionSetStatus) + in.DeepCopyInto(out) + return out +} diff --git a/config/certmanager/certificate.yaml b/config/certmanager/certificate.yaml new file mode 100644 index 0000000..58db114 --- /dev/null +++ b/config/certmanager/certificate.yaml @@ -0,0 +1,26 @@ +# The following manifests contain a self-signed issuer CR and a certificate CR. +# More document can be found at https://docs.cert-manager.io +# WARNING: Targets CertManager 0.11 check https://docs.cert-manager.io/en/latest/tasks/upgrading/index.html for +# breaking changes +apiVersion: cert-manager.io/v1alpha2 +kind: Issuer +metadata: + name: selfsigned-issuer + namespace: system +spec: + selfSigned: {} +--- +apiVersion: cert-manager.io/v1alpha2 +kind: Certificate +metadata: + name: serving-cert # this name should match the one appeared in kustomizeconfig.yaml + namespace: system +spec: + # $(SERVICE_NAME) and $(SERVICE_NAMESPACE) will be substituted by kustomize + dnsNames: + - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc + - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc.cluster.local + issuerRef: + kind: Issuer + name: selfsigned-issuer + secretName: webhook-server-cert # this secret will not be prefixed, since it's not managed by kustomize diff --git a/config/certmanager/kustomization.yaml b/config/certmanager/kustomization.yaml new file mode 100644 index 0000000..bebea5a --- /dev/null +++ b/config/certmanager/kustomization.yaml @@ -0,0 +1,5 @@ +resources: +- certificate.yaml + +configurations: +- kustomizeconfig.yaml diff --git a/config/certmanager/kustomizeconfig.yaml b/config/certmanager/kustomizeconfig.yaml new file mode 100644 index 0000000..90d7c31 --- /dev/null +++ b/config/certmanager/kustomizeconfig.yaml @@ -0,0 +1,16 @@ +# This configuration is for teaching kustomize how to update name ref and var substitution +nameReference: +- kind: Issuer + group: cert-manager.io + fieldSpecs: + - kind: Certificate + group: cert-manager.io + path: spec/issuerRef/name + +varReference: +- kind: Certificate + group: cert-manager.io + path: spec/commonName +- kind: Certificate + group: cert-manager.io + path: spec/dnsNames diff --git a/config/crd/bases/dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml b/config/crd/bases/dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml new file mode 100644 index 0000000..47309a0 --- /dev/null +++ b/config/crd/bases/dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml @@ -0,0 +1,108 @@ + +--- +apiVersion: apiextensions.k8s.io/v1beta1 +kind: CustomResourceDefinition +metadata: + annotations: + controller-gen.kubebuilder.io/version: v0.2.4 + creationTimestamp: null + name: dnsmasqoptionsets.dnsmasq.kvaps.cf +spec: + group: dnsmasq.kvaps.cf + names: + kind: DnsmasqOptionSet + listKind: DnsmasqOptionSetList + plural: dnsmasqoptionsets + shortNames: + - dnsmasqopt + - dnsmasqopts + singular: dnsmasqoptionset + scope: Namespaced + validation: + openAPIV3Schema: + description: DnsmasqOptionSet is the Schema for the dnsmasqoptionsets API + properties: + apiVersion: + description: 'APIVersion defines the versioned schema of this representation + of an object. Servers should convert recognized schemas to the latest + internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources' + type: string + kind: + description: 'Kind is a string value representing the REST resource this + object represents. Servers may infer this from the endpoint the client + submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds' + type: string + metadata: + type: object + spec: + description: DnsmasqOptionSetSpec defines the desired state of DnsmasqOptionSet + properties: + controller: + type: string + options: + items: + description: DnsmasqOptionSetSpecOption defines the desired state + of DnsmasqOptionSetSpec + properties: + key: + enum: + - dhcp-range + - dhcp-host + - dhcp-userclass + - dhcp-circuitid + - dhcp-remoteid + - dhcp-subscrid + - dhcp-ignore + - dhcp-broadcast + - mx-host + - dhcp-boot + - dhcp-option + - dhcp-option-force + - server + - rev-server + - local + - domain + - dhcp-vendorclass + - alias + - dhcp-vendorclass + - srv-host + - txt-record + - ptr-record + - bootp-dynamic + - dhcp-mac + - dhcp-ignore-names + - rebind-domain-ok + - dhcp-match + - dhcp-name-match + - naptr-record + - dhcp-generate-names + - cname + - pxe-service + - add-mac + - dhcp-duid + - host-record + - caa-record + - dns-rr + - auth-zone + - synth-domain + type: string + value: + type: string + type: object + type: array + type: object + status: + description: DnsmasqOptionSetStatus defines the observed state of DnsmasqOptionSet + type: object + type: object + version: v1alpha1 + versions: + - name: v1alpha1 + served: true + storage: true +status: + acceptedNames: + kind: "" + plural: "" + conditions: [] + storedVersions: [] diff --git a/config/crd/kustomization.yaml b/config/crd/kustomization.yaml new file mode 100644 index 0000000..f7ef96e --- /dev/null +++ b/config/crd/kustomization.yaml @@ -0,0 +1,21 @@ +# This kustomization.yaml is not intended to be run by itself, +# since it depends on service name and namespace that are out of this kustomize package. +# It should be run by config/default +resources: +- bases/dnsmasq.kvaps.cf_dnsmasqoptionsets.yaml +# +kubebuilder:scaffold:crdkustomizeresource + +patchesStrategicMerge: +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix. +# patches here are for enabling the conversion webhook for each CRD +#- patches/webhook_in_dnsmasqoptionsets.yaml +# +kubebuilder:scaffold:crdkustomizewebhookpatch + +# [CERTMANAGER] To enable webhook, uncomment all the sections with [CERTMANAGER] prefix. +# patches here are for enabling the CA injection for each CRD +#- patches/cainjection_in_dnsmasqoptionsets.yaml +# +kubebuilder:scaffold:crdkustomizecainjectionpatch + +# the following config is for teaching kustomize how to do kustomization for CRDs. +configurations: +- kustomizeconfig.yaml diff --git a/config/crd/kustomizeconfig.yaml b/config/crd/kustomizeconfig.yaml new file mode 100644 index 0000000..6f83d9a --- /dev/null +++ b/config/crd/kustomizeconfig.yaml @@ -0,0 +1,17 @@ +# This file is for teaching kustomize how to substitute name and namespace reference in CRD +nameReference: +- kind: Service + version: v1 + fieldSpecs: + - kind: CustomResourceDefinition + group: apiextensions.k8s.io + path: spec/conversion/webhookClientConfig/service/name + +namespace: +- kind: CustomResourceDefinition + group: apiextensions.k8s.io + path: spec/conversion/webhookClientConfig/service/namespace + create: false + +varReference: +- path: metadata/annotations diff --git a/config/crd/patches/cainjection_in_dnsmasqoptionsets.yaml b/config/crd/patches/cainjection_in_dnsmasqoptionsets.yaml new file mode 100644 index 0000000..8bc036e --- /dev/null +++ b/config/crd/patches/cainjection_in_dnsmasqoptionsets.yaml @@ -0,0 +1,8 @@ +# The following patch adds a directive for certmanager to inject CA into the CRD +# CRD conversion requires k8s 1.13 or later. +apiVersion: apiextensions.k8s.io/v1beta1 +kind: CustomResourceDefinition +metadata: + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) + name: dnsmasqoptionsets.dnsmasq.kvaps.cf diff --git a/config/crd/patches/webhook_in_dnsmasqoptionsets.yaml b/config/crd/patches/webhook_in_dnsmasqoptionsets.yaml new file mode 100644 index 0000000..1699ab2 --- /dev/null +++ b/config/crd/patches/webhook_in_dnsmasqoptionsets.yaml @@ -0,0 +1,17 @@ +# The following patch enables conversion webhook for CRD +# CRD conversion requires k8s 1.13 or later. +apiVersion: apiextensions.k8s.io/v1beta1 +kind: CustomResourceDefinition +metadata: + name: dnsmasqoptionsets.dnsmasq.kvaps.cf +spec: + conversion: + strategy: Webhook + webhookClientConfig: + # this is "\n" used as a placeholder, otherwise it will be rejected by the apiserver for being blank, + # but we're going to set it later using the cert-manager (or potentially a patch if not using cert-manager) + caBundle: Cg== + service: + namespace: system + name: webhook-service + path: /convert diff --git a/config/default/kustomization.yaml b/config/default/kustomization.yaml new file mode 100644 index 0000000..0c780b1 --- /dev/null +++ b/config/default/kustomization.yaml @@ -0,0 +1,70 @@ +# Adds namespace to all resources. +namespace: dnsmasq-controller-system + +# Value of this field is prepended to the +# names of all resources, e.g. a deployment named +# "wordpress" becomes "alices-wordpress". +# Note that it should also match with the prefix (text before '-') of the namespace +# field above. +namePrefix: dnsmasq-controller- + +# Labels to add to all resources and selectors. +#commonLabels: +# someName: someValue + +bases: +- ../crd +- ../rbac +- ../manager +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- ../webhook +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required. +#- ../certmanager +# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'. +#- ../prometheus + +patchesStrategicMerge: + # Protect the /metrics endpoint by putting it behind auth. + # If you want your controller-manager to expose the /metrics + # endpoint w/o any authn/z, please comment the following line. +- manager_auth_proxy_patch.yaml + +# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in +# crd/kustomization.yaml +#- manager_webhook_patch.yaml + +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. +# Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks. +# 'CERTMANAGER' needs to be enabled to use ca injection +#- webhookcainjection_patch.yaml + +# the following config is for teaching kustomize how to do var substitution +vars: +# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix. +#- name: CERTIFICATE_NAMESPACE # namespace of the certificate CR +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1alpha2 +# name: serving-cert # this name should match the one in certificate.yaml +# fieldref: +# fieldpath: metadata.namespace +#- name: CERTIFICATE_NAME +# objref: +# kind: Certificate +# group: cert-manager.io +# version: v1alpha2 +# name: serving-cert # this name should match the one in certificate.yaml +#- name: SERVICE_NAMESPACE # namespace of the service +# objref: +# kind: Service +# version: v1 +# name: webhook-service +# fieldref: +# fieldpath: metadata.namespace +#- name: SERVICE_NAME +# objref: +# kind: Service +# version: v1 +# name: webhook-service diff --git a/config/default/manager_auth_proxy_patch.yaml b/config/default/manager_auth_proxy_patch.yaml new file mode 100644 index 0000000..77e743d --- /dev/null +++ b/config/default/manager_auth_proxy_patch.yaml @@ -0,0 +1,25 @@ +# This patch inject a sidecar container which is a HTTP proxy for the +# controller manager, it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews. +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: kube-rbac-proxy + image: gcr.io/kubebuilder/kube-rbac-proxy:v0.5.0 + args: + - "--secure-listen-address=0.0.0.0:8443" + - "--upstream=http://127.0.0.1:8080/" + - "--logtostderr=true" + - "--v=10" + ports: + - containerPort: 8443 + name: https + - name: manager + args: + - "--metrics-addr=127.0.0.1:8080" + - "--enable-leader-election" diff --git a/config/default/manager_webhook_patch.yaml b/config/default/manager_webhook_patch.yaml new file mode 100644 index 0000000..738de35 --- /dev/null +++ b/config/default/manager_webhook_patch.yaml @@ -0,0 +1,23 @@ +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system +spec: + template: + spec: + containers: + - name: manager + ports: + - containerPort: 9443 + name: webhook-server + protocol: TCP + volumeMounts: + - mountPath: /tmp/k8s-webhook-server/serving-certs + name: cert + readOnly: true + volumes: + - name: cert + secret: + defaultMode: 420 + secretName: webhook-server-cert diff --git a/config/default/webhookcainjection_patch.yaml b/config/default/webhookcainjection_patch.yaml new file mode 100644 index 0000000..7e79bf9 --- /dev/null +++ b/config/default/webhookcainjection_patch.yaml @@ -0,0 +1,15 @@ +# This patch add annotation to admission webhook config and +# the variables $(CERTIFICATE_NAMESPACE) and $(CERTIFICATE_NAME) will be substituted by kustomize. +apiVersion: admissionregistration.k8s.io/v1beta1 +kind: MutatingWebhookConfiguration +metadata: + name: mutating-webhook-configuration + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) +--- +apiVersion: admissionregistration.k8s.io/v1beta1 +kind: ValidatingWebhookConfiguration +metadata: + name: validating-webhook-configuration + annotations: + cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME) diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml new file mode 100644 index 0000000..5c5f0b8 --- /dev/null +++ b/config/manager/kustomization.yaml @@ -0,0 +1,2 @@ +resources: +- manager.yaml diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml new file mode 100644 index 0000000..b6c85a5 --- /dev/null +++ b/config/manager/manager.yaml @@ -0,0 +1,39 @@ +apiVersion: v1 +kind: Namespace +metadata: + labels: + control-plane: controller-manager + name: system +--- +apiVersion: apps/v1 +kind: Deployment +metadata: + name: controller-manager + namespace: system + labels: + control-plane: controller-manager +spec: + selector: + matchLabels: + control-plane: controller-manager + replicas: 1 + template: + metadata: + labels: + control-plane: controller-manager + spec: + containers: + - command: + - /manager + args: + - --enable-leader-election + image: controller:latest + name: manager + resources: + limits: + cpu: 100m + memory: 30Mi + requests: + cpu: 100m + memory: 20Mi + terminationGracePeriodSeconds: 10 diff --git a/config/prometheus/kustomization.yaml b/config/prometheus/kustomization.yaml new file mode 100644 index 0000000..ed13716 --- /dev/null +++ b/config/prometheus/kustomization.yaml @@ -0,0 +1,2 @@ +resources: +- monitor.yaml diff --git a/config/prometheus/monitor.yaml b/config/prometheus/monitor.yaml new file mode 100644 index 0000000..9b8047b --- /dev/null +++ b/config/prometheus/monitor.yaml @@ -0,0 +1,16 @@ + +# Prometheus Monitor Service (Metrics) +apiVersion: monitoring.coreos.com/v1 +kind: ServiceMonitor +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-monitor + namespace: system +spec: + endpoints: + - path: /metrics + port: https + selector: + matchLabels: + control-plane: controller-manager diff --git a/config/rbac/auth_proxy_client_clusterrole.yaml b/config/rbac/auth_proxy_client_clusterrole.yaml new file mode 100644 index 0000000..7d62534 --- /dev/null +++ b/config/rbac/auth_proxy_client_clusterrole.yaml @@ -0,0 +1,7 @@ +apiVersion: rbac.authorization.k8s.io/v1beta1 +kind: ClusterRole +metadata: + name: metrics-reader +rules: +- nonResourceURLs: ["/metrics"] + verbs: ["get"] diff --git a/config/rbac/auth_proxy_role.yaml b/config/rbac/auth_proxy_role.yaml new file mode 100644 index 0000000..618f5e4 --- /dev/null +++ b/config/rbac/auth_proxy_role.yaml @@ -0,0 +1,13 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: proxy-role +rules: +- apiGroups: ["authentication.k8s.io"] + resources: + - tokenreviews + verbs: ["create"] +- apiGroups: ["authorization.k8s.io"] + resources: + - subjectaccessreviews + verbs: ["create"] diff --git a/config/rbac/auth_proxy_role_binding.yaml b/config/rbac/auth_proxy_role_binding.yaml new file mode 100644 index 0000000..48ed1e4 --- /dev/null +++ b/config/rbac/auth_proxy_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: proxy-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: proxy-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/rbac/auth_proxy_service.yaml b/config/rbac/auth_proxy_service.yaml new file mode 100644 index 0000000..6cf656b --- /dev/null +++ b/config/rbac/auth_proxy_service.yaml @@ -0,0 +1,14 @@ +apiVersion: v1 +kind: Service +metadata: + labels: + control-plane: controller-manager + name: controller-manager-metrics-service + namespace: system +spec: + ports: + - name: https + port: 8443 + targetPort: https + selector: + control-plane: controller-manager diff --git a/config/rbac/dnsmasqoptionset_editor_role.yaml b/config/rbac/dnsmasqoptionset_editor_role.yaml new file mode 100644 index 0000000..5d7104d --- /dev/null +++ b/config/rbac/dnsmasqoptionset_editor_role.yaml @@ -0,0 +1,24 @@ +# permissions for end users to edit dnsmasqoptionsets. +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: dnsmasqoptionset-editor-role +rules: +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets/status + verbs: + - get diff --git a/config/rbac/dnsmasqoptionset_viewer_role.yaml b/config/rbac/dnsmasqoptionset_viewer_role.yaml new file mode 100644 index 0000000..34992c9 --- /dev/null +++ b/config/rbac/dnsmasqoptionset_viewer_role.yaml @@ -0,0 +1,20 @@ +# permissions for end users to view dnsmasqoptionsets. +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + name: dnsmasqoptionset-viewer-role +rules: +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets + verbs: + - get + - list + - watch +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets/status + verbs: + - get diff --git a/config/rbac/kustomization.yaml b/config/rbac/kustomization.yaml new file mode 100644 index 0000000..66c2833 --- /dev/null +++ b/config/rbac/kustomization.yaml @@ -0,0 +1,12 @@ +resources: +- role.yaml +- role_binding.yaml +- leader_election_role.yaml +- leader_election_role_binding.yaml +# Comment the following 4 lines if you want to disable +# the auth proxy (https://github.com/brancz/kube-rbac-proxy) +# which protects your /metrics endpoint. +- auth_proxy_service.yaml +- auth_proxy_role.yaml +- auth_proxy_role_binding.yaml +- auth_proxy_client_clusterrole.yaml diff --git a/config/rbac/leader_election_role.yaml b/config/rbac/leader_election_role.yaml new file mode 100644 index 0000000..eaa7915 --- /dev/null +++ b/config/rbac/leader_election_role.yaml @@ -0,0 +1,32 @@ +# permissions to do leader election. +apiVersion: rbac.authorization.k8s.io/v1 +kind: Role +metadata: + name: leader-election-role +rules: +- apiGroups: + - "" + resources: + - configmaps + verbs: + - get + - list + - watch + - create + - update + - patch + - delete +- apiGroups: + - "" + resources: + - configmaps/status + verbs: + - get + - update + - patch +- apiGroups: + - "" + resources: + - events + verbs: + - create diff --git a/config/rbac/leader_election_role_binding.yaml b/config/rbac/leader_election_role_binding.yaml new file mode 100644 index 0000000..eed1690 --- /dev/null +++ b/config/rbac/leader_election_role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: RoleBinding +metadata: + name: leader-election-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: Role + name: leader-election-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/rbac/role.yaml b/config/rbac/role.yaml new file mode 100644 index 0000000..86de358 --- /dev/null +++ b/config/rbac/role.yaml @@ -0,0 +1,28 @@ + +--- +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRole +metadata: + creationTimestamp: null + name: manager-role +rules: +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets + verbs: + - create + - delete + - get + - list + - patch + - update + - watch +- apiGroups: + - dnsmasq.kvaps.cf + resources: + - dnsmasqoptionsets/status + verbs: + - get + - patch + - update diff --git a/config/rbac/role_binding.yaml b/config/rbac/role_binding.yaml new file mode 100644 index 0000000..8f26587 --- /dev/null +++ b/config/rbac/role_binding.yaml @@ -0,0 +1,12 @@ +apiVersion: rbac.authorization.k8s.io/v1 +kind: ClusterRoleBinding +metadata: + name: manager-rolebinding +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: manager-role +subjects: +- kind: ServiceAccount + name: default + namespace: system diff --git a/config/samples/dnsmasq_v1alpha1_dnsmasqoptionset.yaml b/config/samples/dnsmasq_v1alpha1_dnsmasqoptionset.yaml new file mode 100644 index 0000000..245f362 --- /dev/null +++ b/config/samples/dnsmasq_v1alpha1_dnsmasqoptionset.yaml @@ -0,0 +1,11 @@ +apiVersion: dnsmasq.kvaps.cf/v1alpha1 +kind: DnsmasqOptionSet +metadata: + name: node1 +spec: + controller: "" + options: + - key: host-record + value: node1,10.9.8.7 + - key: dhcp-host + value: set:ltsp1,a0:1d:48:b5:ae:a8,a0:1d:48:b5:ae:a9,id:*,10.9.8.7,node1,infinite diff --git a/config/webhook/kustomization.yaml b/config/webhook/kustomization.yaml new file mode 100644 index 0000000..9cf2613 --- /dev/null +++ b/config/webhook/kustomization.yaml @@ -0,0 +1,6 @@ +resources: +- manifests.yaml +- service.yaml + +configurations: +- kustomizeconfig.yaml diff --git a/config/webhook/kustomizeconfig.yaml b/config/webhook/kustomizeconfig.yaml new file mode 100644 index 0000000..25e21e3 --- /dev/null +++ b/config/webhook/kustomizeconfig.yaml @@ -0,0 +1,25 @@ +# the following config is for teaching kustomize where to look at when substituting vars. +# It requires kustomize v2.1.0 or newer to work properly. +nameReference: +- kind: Service + version: v1 + fieldSpecs: + - kind: MutatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/name + - kind: ValidatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/name + +namespace: +- kind: MutatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/namespace + create: true +- kind: ValidatingWebhookConfiguration + group: admissionregistration.k8s.io + path: webhooks/clientConfig/service/namespace + create: true + +varReference: +- path: metadata/annotations diff --git a/config/webhook/manifests.yaml b/config/webhook/manifests.yaml new file mode 100644 index 0000000..e69de29 diff --git a/config/webhook/service.yaml b/config/webhook/service.yaml new file mode 100644 index 0000000..31e0f82 --- /dev/null +++ b/config/webhook/service.yaml @@ -0,0 +1,12 @@ + +apiVersion: v1 +kind: Service +metadata: + name: webhook-service + namespace: system +spec: + ports: + - port: 443 + targetPort: 9443 + selector: + control-plane: controller-manager diff --git a/controllers/dnsmasqoptionset_controller.go b/controllers/dnsmasqoptionset_controller.go new file mode 100644 index 0000000..dc6a65b --- /dev/null +++ b/controllers/dnsmasqoptionset_controller.go @@ -0,0 +1,160 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package controllers + +import ( + "bytes" + "context" + "crypto/md5" + "fmt" + "io" + "io/ioutil" + "os" + "os/exec" + + "github.com/go-logr/logr" + "k8s.io/apimachinery/pkg/api/errors" + "k8s.io/apimachinery/pkg/runtime" + ctrl "sigs.k8s.io/controller-runtime" + "sigs.k8s.io/controller-runtime/pkg/client" + + dnsmasqv1alpha1 "github.com/kvaps/dnsmasq-controller/api/v1alpha1" + "github.com/kvaps/dnsmasq-controller/pkg/conf" +) + +// DnsmasqOptionSetReconciler reconciles a DnsmasqOptionSet object +type DnsmasqOptionSetReconciler struct { + client.Client + Log logr.Logger + Scheme *runtime.Scheme +} + +// +kubebuilder:rbac:groups=dnsmasq.kvaps.cf,resources=dnsmasqoptionsets,verbs=get;list;watch;create;update;patch;delete +// +kubebuilder:rbac:groups=dnsmasq.kvaps.cf,resources=dnsmasqoptionsets/status,verbs=get;update;patch + +func (r *DnsmasqOptionSetReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) { + _ = context.Background() + _ = r.Log.WithValues("dnsmasqoptionset", req.NamespacedName) + config := conf.GetConfig() + + configFile := config.DnsmasqConfDir + "/" + req.Namespace + "-" + req.Name + ".conf" + tmpConfigFile := config.DnsmasqConfDir + "/." + req.Namespace + "-" + req.Name + ".conf.tmp" + + res := &dnsmasqv1alpha1.DnsmasqOptionSet{} + err := r.Client.Get(context.TODO(), req.NamespacedName, res) + if err != nil { + if errors.IsNotFound(err) { + // Request object not found + if _, err := os.Stat(configFile); !os.IsNotExist(err) { + r.Log.Info("Deleting config " + configFile) + os.Remove(configFile) + config.Generation++ + } + return ctrl.Result{}, nil + } + // Error reading the object - requeue the request. + return ctrl.Result{}, err + } + + if res.Spec.Controller != config.ControllerName { + if _, err := os.Stat(configFile); !os.IsNotExist(err) { + // Controller name has been changed + r.Log.Info("Deleting config " + configFile) + os.Remove(configFile) + config.Generation++ + } + return ctrl.Result{}, nil + } + + var configData string + for _, opt := range res.Spec.Options { + configData += opt.Key + "=" + opt.Value + "\n" + } + configBytes := []byte(configData) + + // If file exists check hash + if _, err := os.Stat(configFile); !os.IsNotExist(err) { + hasher := md5.New() + f, err := os.Open(configFile) + if err != nil { + r.Log.Error(err, "Failed to read config "+configFile) + return ctrl.Result{}, nil + } + defer f.Close() + if _, err := io.Copy(hasher, f); err != nil { + r.Log.Error(err, "Can not calculate hash of "+configFile) + return ctrl.Result{}, nil + } + oldHash := hasher.Sum(nil)[:16] + + hasher = md5.New() + hasher.Write(configBytes) + newHash := hasher.Sum(nil) + + if bytes.Equal(oldHash, newHash) { + return ctrl.Result{}, nil + } + f.Close() + } + + r.Log.Info("Writing config " + configFile) + err = ioutil.WriteFile(tmpConfigFile, configBytes, 0644) + if err != nil { + r.Log.Error(err, "Failed to write "+tmpConfigFile) + return ctrl.Result{}, nil + } + + if err = testConfig(tmpConfigFile); err != nil { + //os.Remove(tmpConfigFile) + r.Log.Error(err, "Config "+tmpConfigFile+" is invalid!") + return ctrl.Result{}, nil + } + + if err = os.Rename(tmpConfigFile, configFile); err != nil { + os.Remove(tmpConfigFile) + r.Log.Error(err, "Failed to move "+tmpConfigFile+" to "+configFile) + return ctrl.Result{}, nil + } + + config.Generation++ + + return ctrl.Result{}, nil +} + +func (r *DnsmasqOptionSetReconciler) SetupWithManager(mgr ctrl.Manager) error { + return ctrl.NewControllerManagedBy(mgr). + For(&dnsmasqv1alpha1.DnsmasqOptionSet{}). + Complete(r) +} + +func testConfig(f string) error { + var stderr bytes.Buffer + dnsmasqBinary, err := exec.LookPath("dnsmasq") + if err != nil { + return err + } + cmd := &exec.Cmd{ + Path: dnsmasqBinary, + Args: []string{"dnsmasq", "--test", "--conf-file=" + f}, + Stderr: &stderr, + } + err = cmd.Run() + if err != nil { + err = fmt.Errorf(string(stderr.Bytes())) + } + return err +} diff --git a/controllers/suite_test.go b/controllers/suite_test.go new file mode 100644 index 0000000..9ee86e7 --- /dev/null +++ b/controllers/suite_test.go @@ -0,0 +1,81 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package controllers + +import ( + "path/filepath" + "testing" + + . "github.com/onsi/ginkgo" + . "github.com/onsi/gomega" + "k8s.io/client-go/kubernetes/scheme" + "k8s.io/client-go/rest" + "sigs.k8s.io/controller-runtime/pkg/client" + "sigs.k8s.io/controller-runtime/pkg/envtest" + "sigs.k8s.io/controller-runtime/pkg/envtest/printer" + logf "sigs.k8s.io/controller-runtime/pkg/log" + "sigs.k8s.io/controller-runtime/pkg/log/zap" + + dnsmasqv1alpha1 "github.com/kvaps/dnsmasq-controller/api/v1alpha1" + // +kubebuilder:scaffold:imports +) + +// These tests use Ginkgo (BDD-style Go testing framework). Refer to +// http://onsi.github.io/ginkgo/ to learn more about Ginkgo. + +var cfg *rest.Config +var k8sClient client.Client +var testEnv *envtest.Environment + +func TestAPIs(t *testing.T) { + RegisterFailHandler(Fail) + + RunSpecsWithDefaultAndCustomReporters(t, + "Controller Suite", + []Reporter{printer.NewlineReporter{}}) +} + +var _ = BeforeSuite(func(done Done) { + logf.SetLogger(zap.LoggerTo(GinkgoWriter, true)) + + By("bootstrapping test environment") + testEnv = &envtest.Environment{ + CRDDirectoryPaths: []string{filepath.Join("..", "config", "crd", "bases")}, + } + + var err error + cfg, err = testEnv.Start() + Expect(err).ToNot(HaveOccurred()) + Expect(cfg).ToNot(BeNil()) + + err = dnsmasqv1alpha1.AddToScheme(scheme.Scheme) + Expect(err).NotTo(HaveOccurred()) + + // +kubebuilder:scaffold:scheme + + k8sClient, err = client.New(cfg, client.Options{Scheme: scheme.Scheme}) + Expect(err).ToNot(HaveOccurred()) + Expect(k8sClient).ToNot(BeNil()) + + close(done) +}, 60) + +var _ = AfterSuite(func() { + By("tearing down the test environment") + err := testEnv.Stop() + Expect(err).ToNot(HaveOccurred()) +}) diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..1ddba0d --- /dev/null +++ b/go.mod @@ -0,0 +1,13 @@ +module github.com/kvaps/dnsmasq-controller + +go 1.13 + +require ( + github.com/go-logr/logr v0.1.0 + github.com/onsi/ginkgo v1.11.0 + github.com/onsi/gomega v1.8.1 + go.uber.org/zap v1.10.0 + k8s.io/apimachinery v0.17.2 + k8s.io/client-go v0.17.2 + sigs.k8s.io/controller-runtime v0.5.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a8bdb9c --- /dev/null +++ b/go.sum @@ -0,0 +1,456 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0 h1:ROfEUZz+Gh5pa62DJWXSaonyu3StP6EA6lPEXPI6mCo= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= 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License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ \ No newline at end of file diff --git a/main.go b/main.go new file mode 100644 index 0000000..2de48dc --- /dev/null +++ b/main.go @@ -0,0 +1,127 @@ +/* + + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +package main + +import ( + "flag" + "os" + + "go.uber.org/zap" + "k8s.io/apimachinery/pkg/runtime" + clientgoscheme "k8s.io/client-go/kubernetes/scheme" + _ "k8s.io/client-go/plugin/pkg/client/auth" + "k8s.io/client-go/tools/clientcmd" + ctrl "sigs.k8s.io/controller-runtime" + logrzap "sigs.k8s.io/controller-runtime/pkg/log/zap" + + dnsmasqv1alpha1 "github.com/kvaps/dnsmasq-controller/api/v1alpha1" + "github.com/kvaps/dnsmasq-controller/controllers" + "github.com/kvaps/dnsmasq-controller/pkg/conf" + "github.com/kvaps/dnsmasq-controller/pkg/server" + // +kubebuilder:scaffold:imports +) + +var ( + scheme = runtime.NewScheme() + setupLog = ctrl.Log.WithName("setup") +) + +func init() { + _ = clientgoscheme.AddToScheme(scheme) + + _ = dnsmasqv1alpha1.AddToScheme(scheme) + // +kubebuilder:scaffold:scheme +} + +func main() { + config := conf.GetConfig() + flag.StringVar(&config.WatchNamespace, "watch-namespace", "", "Namespace the controller watches for updates to Kubernetes objects."+ + " All namespaces are watched if this parameter is left empty.") + flag.StringVar(&config.ControllerName, "controller", "", "Name of the controller this controller satisfies.") + flag.StringVar(&config.MetricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.") + flag.BoolVar(&config.EnableLeaderElection, "enable-leader-election", false, + "Enable leader election for controller manager. "+ + "Enabling this will ensure there is only one active controller manager.") + flag.IntVar(&config.SyncDelay, "sync-delay", 1, "Time in seconds to syncronise dnsmasq configuration.") + flag.StringVar(&config.DnsmasqConfDir, "conf-dir", "/etc/dnsmasq.d", "Dnsmasq config directory for write configuration to.") + flag.StringVar(&config.LogLevel, "log-level", "info", "The log level used by the operator.") + flag.BoolVar(&config.Development, "development", false, "Run the controller in development mode.") + flag.BoolVar(&config.CleanupDir, "cleanup", false, "Cleanup dnsmasq config directory before start.") + + flag.Parse() + config.DnsmasqOptions = flag.Args() + + ctrl.SetLogger(logrzap.New(func(o *logrzap.Options) { + o.Development = config.Development + + if o.Development == false { + lev := zap.NewAtomicLevel() + (&lev).UnmarshalText([]byte(config.LogLevel)) + o.Level = &lev + } + })) + + kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig( + clientcmd.NewDefaultClientConfigLoadingRules(), + &clientcmd.ConfigOverrides{}, + ) + + var err error + config.MyNamespace, _, err = kubeconfig.Namespace() + if err != nil { + setupLog.Error(err, "Failed to get watch namespace") + os.Exit(1) + } + + if config.ControllerName == "" { + config.LeaderElectionID = "dnsmasq-controller-leader" + } else { + config.LeaderElectionID = config.ControllerName + "-dnsmasq-controller-leader" + } + + server.Start() + + mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ + Scheme: scheme, + Namespace: config.WatchNamespace, + MetricsBindAddress: config.MetricsAddr, + Port: 9443, + LeaderElection: config.EnableLeaderElection, + LeaderElectionID: config.LeaderElectionID, + LeaderElectionNamespace: config.MyNamespace, + }) + if err != nil { + setupLog.Error(err, "unable to start manager") + os.Exit(1) + } + + if err = (&controllers.DnsmasqOptionSetReconciler{ + Client: mgr.GetClient(), + Log: ctrl.Log.WithName("controllers").WithName("DnsmasqOptionSet"), + Scheme: mgr.GetScheme(), + }).SetupWithManager(mgr); err != nil { + setupLog.Error(err, "unable to create controller", "controller", "DnsmasqOptionSet") + os.Exit(1) + } + // +kubebuilder:scaffold:builder + + setupLog.Info("starting manager") + if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { + setupLog.Error(err, "problem running manager") + os.Exit(1) + } +} diff --git a/pkg/conf/conf.go b/pkg/conf/conf.go new file mode 100644 index 0000000..359dd59 --- /dev/null +++ b/pkg/conf/conf.go @@ -0,0 +1,26 @@ +package conf + +type Config struct { + Generation int + WatchNamespace string + MyNamespace string + MetricsAddr string + EnableLeaderElection bool + ControllerName string + LeaderElectionID string + SyncDelay int + DnsmasqConfDir string + DnsmasqOptions []string + LogLevel string + Development bool + CleanupDir bool +} + +var instance *Config + +func GetConfig() *Config { + if instance == nil { + instance = &Config{} + } + return instance +} diff --git a/pkg/server/server.go b/pkg/server/server.go new file mode 100644 index 0000000..7ef555e --- /dev/null +++ b/pkg/server/server.go @@ -0,0 +1,92 @@ +package server + +import ( + "io/ioutil" + "os" + "os/exec" + "path" + "strings" + "time" + + "github.com/kvaps/dnsmasq-controller/pkg/conf" + ctrl "sigs.k8s.io/controller-runtime" +) + +var ( + serverLog = ctrl.Log.WithName("server") +) + +func Start() error { + config := conf.GetConfig() + oldGen := 0 + + dnsmasqBinary, err := exec.LookPath("dnsmasq") + if err != nil { + panic("dnsmasq binary is not found!") + } + + err = setupDir(config.DnsmasqConfDir, config.CleanupDir) + if err != nil { + panic(err) + } + + args := []string{"dnsmasq", "--no-daemon", "--conf-dir=" + config.DnsmasqConfDir} + args = append(args, config.DnsmasqOptions...) + + serverLog.Info("Starting dnsmasq: " + strings.Join(args, " ")) + cmd := serverStart(dnsmasqBinary, args) + go func() { + for { + newGen := config.Generation + time.Sleep(time.Duration(config.SyncDelay) * time.Second) + if newGen != oldGen { + serverLog.Info("Configuration changed, restarting dnsmasq.") + serverStop(cmd) + cmd = serverStart(dnsmasqBinary, args) + serverLog.Info("Configuration reloaded.") + oldGen = newGen + } + } + }() + + return nil +} + +func serverStart(dnsmasqBinary string, args []string) *exec.Cmd { + cmd := &exec.Cmd{ + Path: dnsmasqBinary, + Args: args, + } + if err := cmd.Start(); err != nil { + panic(err) + } + return cmd +} + +func serverStop(cmd *exec.Cmd) { + timer := time.AfterFunc(1*time.Second, func() { + err := cmd.Process.Kill() + if err != nil { + panic(err) + } + }) + cmd.Wait() + timer.Stop() +} + +func setupDir(p string, cleanup bool) error { + dir, err := ioutil.ReadDir(p) + if err != nil { + err = os.MkdirAll(p, os.ModePerm) + dir, err = ioutil.ReadDir(p) + if err != nil { + return err + } + } + if cleanup { + for _, d := range dir { + err = os.RemoveAll(path.Join([]string{p, d.Name()}...)) + } + } + return err +}