Implement runner controller

config/rbac/role.yaml

@@ -0,0 +1,28 @@
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  creationTimestamp: null
+  name: manager-role
+rules:
+- apiGroups:
+  - actions.summerwind.dev
+  resources:
+  - runners
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - actions.summerwind.dev
+  resources:
+  - runners/status
+  verbs:
+  - get
+  - patch
+  - update

config/samples/actions_v1alpha1_runner.yaml

@@ -1,7 +1,6 @@
 apiVersion: actions.summerwind.dev/v1alpha1
 kind: Runner
 metadata:
-  name: runner-sample
+  name: summerwind-actions-runner-controller
 spec:
-  # Add fields here
+  repository: summerwind/actions-runner-controller
-  foo: bar

controllers/runner_controller.go

@@ -18,36 +18,200 @@ package controllers
 
 import (
 	"context"
+	"fmt"
+	"reflect"
+	"time"
 
 	"github.com/go-logr/logr"
+	"github.com/google/go-github/v29/github"
+	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/runtime"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
-	actionsv1alpha1 "github.com/summerwind/actions-runner-controller/api/v1alpha1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"github.com/summerwind/actions-runner-controller/api/v1alpha1"
 )
 
+const (
+	defaultImage = "summerwind/actions-runner:latest"
+)
+
+type RegistrationToken struct {
+	Token     string `json:"token"`
+	ExpiresAt string `json:"expires_at"`
+}
+
 // RunnerReconciler reconciles a Runner object
 type RunnerReconciler struct {
 	client.Client
 	Log          logr.Logger
 	Scheme       *runtime.Scheme
+	GitHubClient *github.Client
 }
 
 // +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runners,verbs=get;list;watch;create;update;patch;delete
 // +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runners/status,verbs=get;update;patch
 
 func (r *RunnerReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
-	_ = context.Background()
+	ctx := context.Background()
-	_ = r.Log.WithValues("runner", req.NamespacedName)
+	log := r.Log.WithValues("runner", req.NamespacedName)
 
-	// your logic here
+	var runner v1alpha1.Runner
+	if err := r.Get(ctx, req.NamespacedName, &runner); err != nil {
+		log.Error(err, "unable to fetch Runner")
+		return ctrl.Result{}, client.IgnoreNotFound(err)
+	}
+
+	var pod corev1.Pod
+	if err := r.Get(ctx, req.NamespacedName, &pod); err != nil {
+		if !errors.IsNotFound(err) {
+			return ctrl.Result{}, err
+		}
+
+		if !runner.IsRegisterable() {
+			reg, err := r.newRegistration(ctx, runner.Spec.Repository)
+			if err != nil {
+				log.Error(err, "failed to get new registration")
+				return ctrl.Result{}, err
+			}
+
+			updated := runner.DeepCopy()
+			updated.Status.Registration = reg
+
+			if err := r.Status().Update(ctx, updated); err != nil {
+				log.Error(err, "unable to update Runner status")
+				return ctrl.Result{}, err
+			}
+
+			return ctrl.Result{}, nil
+		}
+
+		pod := r.newPod(runner)
+		err = r.Create(ctx, &pod)
+		if err != nil {
+			log.Error(err, "failed to create a new pod")
+			return ctrl.Result{}, err
+		}
+	} else {
+		newPod := r.newPod(runner)
+		if reflect.DeepEqual(pod.Spec, newPod.Spec) {
+			return ctrl.Result{}, nil
+		}
+
+		if !runner.IsRegisterable() {
+			reg, err := r.newRegistration(ctx, runner.Spec.Repository)
+			if err != nil {
+				log.Error(err, "failed to get new registration")
+				return ctrl.Result{}, err
+			}
+
+			updated := runner.DeepCopy()
+			updated.Status.Registration = reg
+
+			if err := r.Status().Update(ctx, updated); err != nil {
+				log.Error(err, "unable to update Runner status")
+				return ctrl.Result{}, err
+			}
+
+			return ctrl.Result{}, nil
+		}
+
+		// TODO: Do not update.
+		updatedPod := pod.DeepCopy()
+		updatedPod.Spec = newPod.Spec
+
+		if err := r.Update(ctx, updatedPod); err != nil {
+			log.Error(err, "unable to update pod")
+			return ctrl.Result{}, err
+		}
+	}
 
 	return ctrl.Result{}, nil
 }
 
+func (r *RunnerReconciler) newRegistration(ctx context.Context, repo string) (v1alpha1.RunnerStatusRegistration, error) {
+	var reg v1alpha1.RunnerStatusRegistration
+
+	rt, err := r.getRegistrationToken(ctx, repo)
+	if err != nil {
+		return reg, err
+	}
+
+	expiresAt, err := time.Parse(time.RFC3339, rt.ExpiresAt)
+	if err != nil {
+		return reg, err
+	}
+
+	reg.Repository = repo
+	reg.Token = rt.Token
+	reg.ExpiresAt = metav1.NewTime(expiresAt)
+
+	return reg, err
+}
+
+func (r *RunnerReconciler) getRegistrationToken(ctx context.Context, repo string) (RegistrationToken, error) {
+	var regToken RegistrationToken
+
+	req, err := r.GitHubClient.NewRequest("POST", fmt.Sprintf("/repos/%s/actions/runners/registration-token", repo), nil)
+	if err != nil {
+		return regToken, err
+	}
+
+	res, err := r.GitHubClient.Do(ctx, req, &regToken)
+	if err != nil {
+		return regToken, err
+	}
+
+	if res.StatusCode != 201 {
+		return regToken, fmt.Errorf("unexpected status: %d", res.StatusCode)
+	}
+
+	return regToken, nil
+}
+
+func (r *RunnerReconciler) newPod(runner v1alpha1.Runner) corev1.Pod {
+	image := runner.Spec.Image
+	if image == "" {
+		image = defaultImage
+	}
+
+	return corev1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      runner.Name,
+			Namespace: runner.Namespace,
+		},
+		Spec: corev1.PodSpec{
+			RestartPolicy: "Never",
+			Containers: []corev1.Container{
+				{
+					Name:            "runner",
+					Image:           image,
+					ImagePullPolicy: "Always",
+					Env: []corev1.EnvVar{
+						corev1.EnvVar{
+							Name:  "RUNNER_NAME",
+							Value: runner.Name,
+						},
+						corev1.EnvVar{
+							Name:  "RUNNER_REPO",
+							Value: runner.Spec.Repository,
+						},
+						corev1.EnvVar{
+							Name:  "RUNNER_TOKEN",
+							Value: runner.Status.Registration.Token,
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
 func (r *RunnerReconciler) SetupWithManager(mgr ctrl.Manager) error {
 	return ctrl.NewControllerManagedBy(mgr).
-		For(&actionsv1alpha1.Runner{}).
+		For(&v1alpha1.Runner{}).
 		Complete(r)
 }

go.mod

@@ -3,9 +3,18 @@ module github.com/summerwind/actions-runner-controller
 go 1.13
 
 require (
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
+	github.com/bradleyfalzon/ghinstallation v1.1.1
 	github.com/go-logr/logr v0.1.0
+	github.com/google/go-github v17.0.0+incompatible
+	github.com/google/go-github/v29 v29.0.2
 	github.com/onsi/ginkgo v1.8.0
 	github.com/onsi/gomega v1.5.0
+	github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
+	gopkg.in/alecthomas/kingpin.v2 v2.2.6 // indirect
+	k8s.io/api v0.0.0-20190918155943-95b840bb6a1f
 	k8s.io/apimachinery v0.0.0-20190913080033-27d36303b655
 	k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90
 	sigs.k8s.io/controller-runtime v0.4.0

go.sum

@@ -18,12 +18,18 @@ github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbt
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/blang/semver v3.5.0+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
+github.com/bradleyfalzon/ghinstallation v1.1.1 h1:pmBXkxgM1WeF8QYvDLT5kuQiHMcmf+X015GI0KM/E3I=
+github.com/bradleyfalzon/ghinstallation v1.1.1/go.mod h1:vyCmHTciHx/uuyN82Zc3rXN3X2KTK8nUTCrTMwAhcug=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.1-coreos.6/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
@@ -39,6 +45,7 @@ github.com/davecgh/go-spew v0.0.0-20151105211317-5215b55f46b2/go.mod h1:J7Y8YcW2
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/docker/docker v0.7.3-0.20190327010347-be7ac8be2ae0/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
@@ -111,6 +118,14 @@ github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Z
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-github v17.0.0+incompatible h1:N0LgJ1j65A7kfXrZnUDaYCs/Sf4rEjNlfyDHW9dolSY=
+github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
+github.com/google/go-github/v29 v29.0.2 h1:opYN6Wc7DOz7Ku3Oh4l7prmkOMwEcQxpFtxdU8N8Pts=
+github.com/google/go-github/v29 v29.0.2/go.mod h1:CHKiKKPHJ0REzfwc14QMklvtHwCveD0PxlMjLlzAM5E=
+github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
+github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/google/gofuzz v0.0.0-20161122191042-44d81051d367/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -201,6 +216,7 @@ github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a h1:9a8MnZMP0X2nL
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/remyoudompheng/bigfft v0.0.0-20170806203942-52369c62f446/go.mod h1:uYEyJGbgTkfkS4+E/PavXkNJcbFIpEtjt2B0KDQ5+9M=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/soheilhy/cmux v0.1.3/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
@@ -219,6 +235,7 @@ github.com/stretchr/testify v0.0.0-20151208002404-e3a8ff8ce365/go.mod h1:a8OnRci
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/xiang90/probing v0.0.0-20160813154853-07dd2e8dfe18/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
@@ -324,6 +341,8 @@ google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=

main.go

@@ -17,11 +17,15 @@ limitations under the License.
 package main
 
 import (
+	"context"
+	"errors"
 	"flag"
 	"os"
 
+	"github.com/google/go-github/v29/github"
 	actionsv1alpha1 "github.com/summerwind/actions-runner-controller/api/v1alpha1"
 	"github.com/summerwind/actions-runner-controller/controllers"
+	"golang.org/x/oauth2"
 	"k8s.io/apimachinery/pkg/runtime"
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
@@ -50,6 +54,18 @@ func main() {
 		"Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
 	flag.Parse()
 
+	ghToken := os.Getenv("GITHUB_TOKEN")
+	if ghToken == "" {
+		err := errors.New("github token is not specified")
+		setupLog.Error(err, "environment variable 'GITHUB_TOKEN' must be set")
+		os.Exit(1)
+	}
+
+	tc := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: ghToken},
+	))
+	ghClient := github.NewClient(tc)
+
 	ctrl.SetLogger(zap.New(func(o *zap.Options) {
 		o.Development = true
 	}))
@@ -65,11 +81,14 @@ func main() {
 		os.Exit(1)
 	}
 
-	if err = (&controllers.RunnerReconciler{
+	runnerReconciler := &controllers.RunnerReconciler{
 		Client:       mgr.GetClient(),
 		Log:          ctrl.Log.WithName("controllers").WithName("Runner"),
 		Scheme:       mgr.GetScheme(),
-	}).SetupWithManager(mgr); err != nil {
+		GitHubClient: ghClient,
+	}
+
+	if err = runnerReconciler.SetupWithManager(mgr); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "Runner")
 		os.Exit(1)
 	}