go.mod

@@ -15,22 +15,13 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/emicklei/go-restful/v3 v3.11.0 // indirect
 	github.com/go-logr/logr v1.3.0 // indirect
-	github.com/go-openapi/jsonpointer v0.19.6 // indirect
-	github.com/go-openapi/jsonreference v0.20.2 // indirect
-	github.com/go-openapi/swag v0.22.3 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/google/gnostic-models v0.6.8 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/google/uuid v1.3.0 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/prometheus/client_golang v1.18.0 // indirect
 	github.com/prometheus/client_model v0.5.0 // indirect
 	github.com/prometheus/common v0.46.0 // indirect
@@ -49,7 +40,6 @@ require (
 	k8s.io/api v0.29.3 // indirect
 	k8s.io/apimachinery v0.29.3 // indirect
 	k8s.io/klog/v2 v2.110.1 // indirect
-	k8s.io/kube-openapi v0.0.0-20231010175941-2dd684a91f00 // indirect
 	k8s.io/utils v0.0.0-20230726121419-3b25d923346b // indirect
 	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect

go.sum

@@ -5,7 +5,6 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 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=
@@ -19,8 +18,6 @@ github.com/go-openapi/jsonreference v0.20.2 h1:3sVjiK66+uXK/6oQ8xgcRKcFgQ5KXa2Kv
 github.com/go-openapi/jsonreference v0.20.2/go.mod h1:Bl1zwGIM8/wsvqjsOQLJ/SH+En5Ap4rVB5KVcIDZG2k=
 github.com/go-openapi/swag v0.22.3 h1:yMBqmnQ0gyZvEb/+KzuWZOXgllrXT4SADYbvDaXHv/g=
 github.com/go-openapi/swag v0.22.3/go.mod h1:UzaqsxGiab7freDnrUUra0MwWfN/q7tE4j+VcZ0yl14=
-github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
-github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -34,8 +31,6 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
 github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1 h1:K6RDEckDVWvDI9JAJYCmNdQXq6neHJOYx3V6jnqNEec=
-github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
@@ -50,11 +45,8 @@ github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnr
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
-github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
@@ -66,10 +58,6 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/onsi/ginkgo/v2 v2.13.0 h1:0jY9lJquiL8fcf3M4LAXN5aMlS/b2BV86HFFPCPMgE4=
-github.com/onsi/ginkgo/v2 v2.13.0/go.mod h1:TE309ZR8s5FsKKpuB1YAQYBzCaAfUgatB/xlT/ETL/o=
-github.com/onsi/gomega v1.29.0 h1:KIA/t2t5UBzoirT4H9tsML45GEbo3ouUnBHsCfD2tVg=
-github.com/onsi/gomega v1.29.0/go.mod h1:9sxs+SwGrKI0+PWe4Fxa9tFQQBG5xSsSbMXOI8PPpoQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
@@ -87,13 +75,8 @@ github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVs
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -134,8 +117,6 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.16.1 h1:TLyB3WofjdOEepBHAU20JdNC1Zbg87elYofWYAY5oZA=
-golang.org/x/tools v0.16.1/go.mod h1:kYVVN6I1mBNoB1OX+noeBjbRk4IUEPa7JJ+TJMEooJ0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

internal/config.go

@@ -12,6 +12,7 @@ type Config = struct {
 	LogLevel      string `default:"Info" env:"MAIL_DNS_SERVICE_LOGLEVEL"`
 	LabelSelector string `default:"kops.k8s.io/instance-role=Node" env:"MAIL_DNS_SERVICE_LABELSELECTOR"`
 	HcloudToken   string `default:"" env:"MAIL_DNS_SERVICE_HCLOUD_TOKEN"`
+	Namespace     string `default:"mailu" env:"MAIL_DNS_SERVICE_NAMESPACE"`
 }
 
 func GenConfig() (cfg *Config, err error) {

internal/config_test.go

@@ -9,6 +9,7 @@ var defaultConfig = Config{
 	LogLevel:      "Info",
 	LabelSelector: "kops.k8s.io/instance-role=Node",
 	HcloudToken:   "",
+	Namespace:     "mailu",
 }
 
 func TestConfigDefaults(t *testing.T) {

internal/k8s.go

@@ -2,51 +2,106 @@ package internal
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"html/template"
 
-	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/kubernetes/scheme"
 	"k8s.io/client-go/rest"
 )
 
-func RecreateDnsCrd() error {
-	k8s_config, err := rest.InClusterConfig()
-	if err != nil {
-		return errors.New(fmt.Sprintf("Could not create in cluster k8s config: %v", err))
-	}
-	_, err = kubernetes.NewForConfig(k8s_config)
-	if err != nil {
-		return errors.New(fmt.Sprintf("Could not create k8s client: %v", err))
-	}
-	return nil
-}
-
 var CRD_TEMPLATE = `
-apiVersion: externaldns.k8s.io/v1alpha1
+{
-kind: DNSEndpoint
+    "apiVersion": "externaldns.k8s.io/v1alpha1",
-metadata:
+    "kind": "DNSEndpoint",
-  name: {{ .Name }}
+    "metadata": {
-  annotations: 
+        "name": "{{ .Name }}",
-    external.dns/provider: cf
+        "annotations": {
-spec:
+            "external.dns/provider": "cf"
-  endpoints:
+        }
-  - dnsName: mail
+    },
-    recordTTL: 180
+    "spec": {
-    recordType: A
+        "endpoints": [
-    targets:
+            {
-    - {{ .IP }}
+                "dnsName": "mail",
+                "recordTTL": 180,
+                "recordType": "A",
+                "targets": [
+                    {{ range .IPs -}}
+                    "{{ . }}",
+                    {{ end -}}
+                ]
+            }
+        ]
+    }
+}
 `
 
 type CrdConfig struct {
 	Name string
-	IP   string
+	IPs  []string
 }
 
-func generateCrd(name string, ip string) (string, error) {
+func RecreateDnsCrd(cfg *Config, name string, ips []string) error {
+
+	routeclient, err := createRestClient()
+
+	if err != nil {
+		return errors.New(fmt.Sprintf("Error creating REST Client: %v", err.Error()))
+	}
+
+	body, err := generateCrd(name, ips)
+
+	if err != nil {
+		return errors.New(fmt.Sprintf("Error generating CRD: %v", err.Error()))
+	}
+
+	decode := scheme.Codecs.UniversalDeserializer().Decode
+
+	obj, _, err := decode([]byte(body), nil, nil)
+	if err != nil {
+		return errors.New(fmt.Sprintf("Could not deserialize CRD: %v", err.Error()))
+	}
+
+	res := routeclient.Post().
+		Namespace(cfg.Namespace).
+		Resource("routes").
+		Body(&obj).
+		Do(context.TODO())
+
+	var status int
+	res.StatusCode(&status)
+
+	if status >= 200 && status <= 400 {
+		return errors.New(fmt.Sprintf("Failed to post CRD to kube api: %v", res.Error().Error()))
+	}
+
+	return nil
+}
+
+func createRestClient() (*rest.RESTClient, error) {
+	k8s_config, err := rest.InClusterConfig()
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Could not create in cluster k8s config: %v", err))
+	}
+
+	k8s_config.APIPath = "/apis"
+	k8s_config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
+
+	routeclient, err := rest.RESTClientFor(k8s_config)
+
+	if err != nil {
+		return nil, errors.New(fmt.Sprintf("Could not create k8s client: %v", err))
+	}
+	return routeclient, nil
+
+}
+
+func generateCrd(name string, ips []string) (string, error) {
 	config := CrdConfig{
 		Name: name,
-		IP:   ip,
+		IPs:  ips,
 	}
 	tmpl, err := template.New("crd").Parse(CRD_TEMPLATE)
 	if err != nil {

internal/k8s_test.go

@@ -0,0 +1,40 @@
+package internal
+
+import (
+	"testing"
+)
+
+func TestGenerateCRD(t *testing.T) {
+	expected := `
+{
+    "apiVersion": "externaldns.k8s.io/v1alpha1",
+    "kind": "DNSEndpoint",
+    "metadata": {
+        "name": "test",
+        "annotations": {
+            "external.dns/provider": "cf"
+        }
+    },
+    "spec": {
+        "endpoints": [
+            {
+                "dnsName": "mail",
+                "recordTTL": 180,
+                "recordType": "A",
+                "targets": [
+                    "192.168.0.1",
+                    "192.168.0.2",
+                    ]
+            }
+        ]
+    }
+}
+`
+	got, err := generateCrd("test", []string{"192.168.0.1", "192.168.0.2"})
+	if err != nil {
+		t.Errorf("%s", err.Error())
+	}
+	if expected != got {
+		t.Errorf("got %+v, want %+v", got, expected)
+	}
+}