Merge "Add CRD resolution"

2019-11-13 19:48:54 +00:00 · 2019-11-13 19:48:54 +00:00 · 880c42bfe0
parent f3ccc07e86 7c3ec25005
commit 880c42bfe0
13 changed files with 552 additions and 255 deletions
--- a/.golangci.yaml
+++ b/.golangci.yaml
@ -146,6 +146,5 @@ linters:
    - misspell             # Finds commonly misspelled English words in comments
    - nakedret             # Finds naked returns in functions greater than a specified function length
    - prealloc             # Finds slice declarations that could potentially be preallocated
-    - scopelint            # Scopelint checks for unpinned variables in go programs
    - unconvert            # Remove unnecessary type conversions
    - unparam              # Reports unused function parameters
--- a/2
+++ b/2
@ -49,4 +49,4 @@ clean:

 .PHONY: unit-test
 unit-tests:
-	@go test ./...
+	@go test -v ./...
--- a/README.md
+++ b/README.md
@ -99,6 +99,28 @@ Example:

 `DEPENDENCY_POD_JSON='[{"namespace": "foo", "labels": {"k1": "v1", "k2": "v2"}}, {"labels": {"k1": "v1", "k2": "v2"}, "requireSameNode": true}]'`

+### Custom Resource
+This dependency checks whether an arbitrary key on a given CustomResource
+matches a desired value. The environment variable `DEPENDENCY_CUSTOM_RESOURCE`
+dictates the specific object to watch, as well as the key and its desired
+value.
+
+For example, suppose you have the following `DEPENDENCY_CUSTOM_RESOURCE` and CustomResource:
+`DEPENDENCY_CUSTOM_RESOURCE='[{"apiVersion":"stable.example.com/v1","kind":"Foo","namespace":"default","name":"my-foo","fields":[{"key":"spec.arbitrary-key","value":"ready"}]}]'`
+```
+apiVersion: stable.example.com/v1
+kind: Foo
+metadata:
+  name: my-foo
+  namespace: default
+spec:
+  arbitrary-key: not-ready
+```
+Given the above, kubernetes-entrypoint will wait until the value of
+`spec.arbitrary-key` has flipped from `not-ready` to `ready`.
+
+Note also that `fields` is a list, meaning that multiple fields can be monitered.
+
 ## Image

 Build process for image is triggered after each commit.
--- a/client/client.go
+++ b/client/client.go
@ -1,6 +1,13 @@
 package client

 import (
+	"fmt"
+	"strings"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/dynamic"
 	"k8s.io/client-go/kubernetes"
 	appsv1 "k8s.io/client-go/kubernetes/typed/apps/v1"
 	v1batch "k8s.io/client-go/kubernetes/typed/batch/v1"
@ -14,28 +21,61 @@ type ClientInterface interface {
 	Endpoints(string) v1core.EndpointsInterface
 	DaemonSets(string) appsv1.DaemonSetInterface
 	Services(string) v1core.ServiceInterface
+	CustomResource(apiVersion, namespace, resource, name string) (*unstructured.Unstructured, error)
 }
 type Client struct {
-	*kubernetes.Clientset
+	client        kubernetes.Interface
+	dynamicClient dynamic.Interface
 }

 func (c Client) Pods(namespace string) v1core.PodInterface {
-	return c.Clientset.CoreV1().Pods(namespace)
+	return c.client.CoreV1().Pods(namespace)
 }

 func (c Client) Jobs(namespace string) v1batch.JobInterface {
-	return c.Clientset.BatchV1().Jobs(namespace)
+	return c.client.BatchV1().Jobs(namespace)
 }

 func (c Client) Endpoints(namespace string) v1core.EndpointsInterface {
-	return c.Clientset.CoreV1().Endpoints(namespace)
+	return c.client.CoreV1().Endpoints(namespace)
 }
 func (c Client) DaemonSets(namespace string) appsv1.DaemonSetInterface {
-	return c.Clientset.AppsV1().DaemonSets(namespace)
+	return c.client.AppsV1().DaemonSets(namespace)
 }

 func (c Client) Services(namespace string) v1core.ServiceInterface {
-	return c.Clientset.CoreV1().Services(namespace)
+	return c.client.CoreV1().Services(namespace)
+}
+
+func (c Client) CustomResource(apiVersion, kind, namespace, name string) (*unstructured.Unstructured, error) {
+	apiResourceList, err := c.client.Discovery().ServerResourcesForGroupVersion(apiVersion)
+	if err != nil {
+		return nil, err
+	}
+
+	parts := strings.Split(apiVersion, "/")
+	if len(parts) != 2 {
+		return nil, fmt.Errorf(`apiVersion [%s] must be "group/version"`,
+			apiVersion)
+	}
+	group, version := parts[0], parts[1]
+
+	for _, apiResource := range apiResourceList.APIResources {
+		if apiResource.Kind == kind {
+			gvr := schema.GroupVersionResource{
+				Group:    group,
+				Version:  version,
+				Resource: apiResource.Name,
+			}
+
+			return c.dynamicClient.Resource(gvr).
+				Namespace(namespace).
+				Get(name, metav1.GetOptions{})
+		}
+	}
+	return nil, fmt.Errorf("Could not find resource with with version %v, "+
+		"kind %v, and name %v in namespace %v",
+		apiVersion, kind, name, namespace)
 }

 func New(config *rest.Config) (ClientInterface, error) {
@ -45,11 +85,6 @@ func New(config *rest.Config) (ClientInterface, error) {
 		if err != nil {
 			return nil, err
 		}
-		clientset, err := kubernetes.NewForConfig(config)
-		if err != nil {
-			return nil, err
-		}
-		return Client{Clientset: clientset}, nil
 	}

 	clientset, err := kubernetes.NewForConfig(config)
@ -57,6 +92,10 @@ func New(config *rest.Config) (ClientInterface, error) {
 		return nil, err
 	}

-	return Client{Clientset: clientset}, nil
+	dynamicClient, err := dynamic.NewForConfig(config)
+	if err != nil {
+		return nil, err
+	}

+	return Client{clientset, dynamicClient}, nil
 }
--- a/dependencies/customresource/customresource.go
+++ b/dependencies/customresource/customresource.go
@ -0,0 +1,94 @@
+package customresource
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+
+	"opendev.org/airship/kubernetes-entrypoint/entrypoint"
+	"opendev.org/airship/kubernetes-entrypoint/logger"
+	"opendev.org/airship/kubernetes-entrypoint/util/env"
+)
+
+// A Resolver represents the state of a CustomResource
+type Resolver struct {
+	APIVersion string  `json:"apiVersion"`
+	Kind       string  `json:"kind"`
+	Name       string  `json:"name"`
+	Namespace  string  `json:"namespace"`
+	Fields     []Field `json:"fields"`
+}
+
+var _ entrypoint.Resolver = Resolver{}
+
+// A Field represents a key-value pair
+type Field struct {
+	Key   string `json:"key"`
+	Value string `json:"value"`
+}
+
+func init() {
+	crEnv := fmt.Sprintf("%sCUSTOM_RESOURCE", entrypoint.DependencyPrefix)
+	resolvers, err := fromEnv(crEnv)
+	if err != nil {
+		logger.Error.Printf(err.Error())
+	}
+	for _, resolver := range resolvers {
+		entrypoint.Register(resolver)
+	}
+}
+
+// IsResolved will return true when the values for each key in r.Fields is the same as the resource in the cluster
+func (r Resolver) IsResolved(ep entrypoint.EntrypointInterface) (bool, error) {
+	customResource, err := ep.Client().CustomResource(r.APIVersion, r.Kind, r.Namespace, r.Name)
+	if err != nil {
+		return false, err
+	}
+
+	for _, field := range r.Fields {
+		key := field.Key
+		expected := field.Value
+
+		// Extract the specified value from the resource
+		actual, found, err := unstructured.NestedFieldNoCopy(customResource.Object, strings.Split(key, ".")...)
+		if err != nil {
+			return false, err
+		}
+		if !found {
+			return false, fmt.Errorf("Could not find key [%s]", key)
+		}
+		if actual != expected {
+			return false, fmt.Errorf("Expected value of [%s] to be [%s], but got [%s]", key, expected, actual)
+		}
+	}
+
+	return true, nil
+}
+
+// fromEnv reads the value of the jsonEnv variable and returns the array of
+// Resolvers it contains, if any
+func fromEnv(jsonEnv string) ([]Resolver, error) {
+	resolvers := []Resolver{}
+	jsonEnvVal, isSet := os.LookupEnv(jsonEnv)
+	if !isSet {
+		return resolvers, nil
+	}
+
+	err := json.Unmarshal([]byte(jsonEnvVal), &resolvers)
+	if err != nil {
+		return resolvers, fmt.Errorf("Unable to unmarshal variable %s with value %s: %s",
+			jsonEnv, jsonEnvVal, err.Error())
+	}
+
+	namespace := env.GetBaseNamespace()
+	for i := range resolvers {
+		if resolvers[i].Namespace == "" {
+			resolvers[i].Namespace = namespace
+		}
+	}
+
+	return resolvers, nil
+}
--- a/dependencies/customresource/customresource_test.go
+++ b/dependencies/customresource/customresource_test.go
@ -0,0 +1,305 @@
+package customresource
+
+import (
+	"errors"
+	"os"
+	"reflect"
+	"testing"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"opendev.org/airship/kubernetes-entrypoint/mocks"
+)
+
+const listOfTwoCRResolvers = `
+[
+  {
+    "apiVersion": "api1",
+    "kind": "kind1",
+    "namespace": "foospace1",
+    "name": "foo1",
+    "fields": [
+      {
+        "key": "field1key1",
+        "value": "field1val1"
+      },
+      {
+        "key": "field1key2",
+        "value": "field1val2"
+      }
+    ]
+  },
+  {
+    "apiVersion": "api2",
+    "kind": "kind2",
+    "namespace": "foospace2",
+    "name": "foo2",
+    "fields": [
+      {
+        "key": "field2key1",
+        "value": "field2val1"
+      },
+      {
+        "key": "field2key2",
+        "value": "field2val2"
+      }
+    ]
+  }
+]`
+
+func TestFromEnv(t *testing.T) {
+	tests := []struct {
+		name      string
+		useEnvVar bool
+		envVar    string
+		expected  []Resolver
+		expectErr bool
+	}{
+		{
+			name:      "EmptyVar",
+			useEnvVar: false,
+			envVar:    "",
+			expected:  []Resolver{},
+			expectErr: false,
+		},
+		{
+			name:      "InvalidVar",
+			useEnvVar: true,
+			envVar:    `[}"invalid": "json"}]`,
+			expected:  []Resolver{},
+			expectErr: true,
+		},
+		{
+			name:      "Successful",
+			useEnvVar: true,
+			envVar:    listOfTwoCRResolvers,
+			expected: []Resolver{
+				{
+					APIVersion: "api1",
+					Kind:       "kind1",
+					Namespace:  "foospace1",
+					Name:       "foo1",
+					Fields: []Field{
+						{
+							Key:   "field1key1",
+							Value: "field1val1",
+						},
+						{
+							Key:   "field1key2",
+							Value: "field1val2",
+						},
+					},
+				},
+				{
+					APIVersion: "api2",
+					Kind:       "kind2",
+					Namespace:  "foospace2",
+					Name:       "foo2",
+					Fields: []Field{
+						{
+							Key:   "field2key1",
+							Value: "field2val1",
+						},
+						{
+							Key:   "field2key2",
+							Value: "field2val2",
+						},
+					},
+				},
+			},
+			expectErr: false,
+		},
+		{
+			name:      "UnNamespaced",
+			useEnvVar: true,
+			envVar:    `[{"apiVersion":"api","kind":"kind","name":"foo","fields":[]}]`,
+			expected: []Resolver{
+				{
+					APIVersion: "api",
+					Kind:       "kind",
+					Namespace:  "default",
+					Name:       "foo",
+					Fields:     []Field{},
+				},
+			},
+			expectErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.useEnvVar {
+				os.Setenv("TEST_LIST_JSON", tt.envVar)
+				defer os.Unsetenv("TEST_LIST_JSON")
+			} else {
+				os.Unsetenv("TEST_LIST_JSON")
+			}
+
+			actual, err := fromEnv("TEST_LIST_JSON")
+			if err != nil {
+				if !tt.expectErr {
+					t.Fatalf("Unexpected error: %s", err.Error())
+				}
+			} else if tt.expectErr {
+				t.Fatalf("Expected error, but received none")
+			}
+
+			if !reflect.DeepEqual(tt.expected, actual) {
+				t.Errorf("Expected %+v, got %+v", tt.expected, actual)
+			}
+		})
+	}
+}
+
+func TestIsResolved(t *testing.T) {
+	tests := []struct {
+		name           string
+		customResource *unstructured.Unstructured
+		resolver       Resolver
+		expected       bool
+		expectErr      bool
+		clientErr      error
+	}{
+		{
+			name: "Successful",
+			customResource: &unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": "stable.example.com/v1",
+					"kind":       "Foo",
+					"name":       "my-foo",
+					"namespace":  "default",
+					"simpleKey":  "ready",
+					"complex": map[string]interface{}{
+						"key": map[string]interface{}{
+							"with": map[string]interface{}{
+								"layers": "ready",
+							},
+						},
+					},
+				},
+			},
+			resolver: Resolver{
+				APIVersion: "stable.exmaple.com/v1",
+				Kind:       "Foo",
+				Name:       "my-foo",
+				Fields: []Field{
+					{
+						Key:   "simpleKey",
+						Value: "ready",
+					},
+					{
+						Key:   "complex.key.with.layers",
+						Value: "ready",
+					},
+				},
+			},
+			expected:  true,
+			expectErr: false,
+			clientErr: nil,
+		},
+		{
+			name: "Unresolved",
+			customResource: &unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": "stable.example.com/v1",
+					"kind":       "Foo",
+					"name":       "my-foo",
+					"namespace":  "default",
+					"simpleKey":  "NOT-ready",
+				},
+			},
+			resolver: Resolver{
+				APIVersion: "stable.exmaple.com/v1",
+				Kind:       "Foo",
+				Name:       "my-foo",
+				Fields: []Field{
+					{
+						Key:   "simpleKey",
+						Value: "ready",
+					},
+				},
+			},
+			expected:  false,
+			expectErr: true,
+			clientErr: nil,
+		},
+		{
+			name:           "ClientError",
+			customResource: &unstructured.Unstructured{},
+			resolver:       Resolver{},
+			expected:       false,
+			expectErr:      true,
+			clientErr:      errors.New("Generic error"),
+		},
+		{
+			name: "BadCustomResource",
+			customResource: &unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": "stable.example.com/v1",
+					"kind":       "Foo",
+					"name":       "my-foo",
+					"namespace":  "default",
+					"notAMap":    5,
+				},
+			},
+			resolver: Resolver{
+				APIVersion: "stable.exmaple.com/v1",
+				Kind:       "Foo",
+				Name:       "my-foo",
+				Fields: []Field{
+					{
+						Key:   "notAMap.nothingHere",
+						Value: "ready",
+					},
+				},
+			},
+			expected:  false,
+			expectErr: true,
+			clientErr: nil,
+		},
+		{
+			name: "MissingKey",
+			customResource: &unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": "stable.example.com/v1",
+					"kind":       "Foo",
+					"name":       "my-foo",
+					"namespace":  "default",
+				},
+			},
+			resolver: Resolver{
+				APIVersion: "stable.exmaple.com/v1",
+				Kind:       "Foo",
+				Name:       "my-foo",
+				Fields: []Field{
+					{
+						Key:   "missingKey",
+						Value: "ready",
+					},
+				},
+			},
+			expected:  false,
+			expectErr: true,
+			clientErr: nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ep := mocks.NewEntrypoint()
+			ep.MockClient.FakeCustomResource = tt.customResource
+			ep.MockClient.Err = tt.clientErr
+			result, err := tt.resolver.IsResolved(ep)
+			if err != nil {
+				if !tt.expectErr {
+					t.Fatalf("Unexpected error: %s", err.Error())
+				}
+			} else if tt.expectErr {
+				t.Fatalf("Expected error, but received none")
+			}
+
+			if result != tt.expected {
+				t.Errorf("Expected success to be %v, but got %v", tt.expected, result)
+			}
+		})
+	}
+}
--- a/entrypoint/entrypoint.go
+++ b/entrypoint/entrypoint.go
@ -6,7 +6,7 @@ import (

 	"k8s.io/client-go/rest"

-	cli "opendev.org/airship/kubernetes-entrypoint/client"
+	"opendev.org/airship/kubernetes-entrypoint/client"
 	"opendev.org/airship/kubernetes-entrypoint/logger"
 )

@ -25,12 +25,12 @@ type Resolver interface {

 type EntrypointInterface interface {
 	Resolve()
-	Client() cli.ClientInterface
+	Client() client.ClientInterface
 }

 // Entrypoint is a main struct which checks dependencies
 type Entrypoint struct {
-	client    cli.ClientInterface
+	client    client.ClientInterface
 	namespace string
 }

@ -45,7 +45,7 @@ func Register(res Resolver) {
 //New is a constructor for entrypoint
 func New(config *rest.Config) (entry *Entrypoint, err error) {
 	entry = new(Entrypoint)
-	client, err := cli.New(config)
+	client, err := client.New(config)
 	if err != nil {
 		return nil, err
 	}
@ -53,7 +53,7 @@ func New(config *rest.Config) (entry *Entrypoint, err error) {
 	return entry, err
 }

-func (e Entrypoint) Client() (client cli.ClientInterface) {
+func (e Entrypoint) Client() (client client.ClientInterface) {
 	return e.client
 }

@ -69,7 +69,7 @@ func (e Entrypoint) Resolve() {
 			status := false
 			for !status {
 				if status, err = dep.IsResolved(e); err != nil {
-					logger.Warning.Printf("Resolving dependency %s failed: %v .", dep, err)
+					logger.Warning.Printf("Resolving dependency %+v failed: %v .", dep, err)
 				}
 				time.Sleep(resolverSleepInterval * time.Second)
 			}
--- a/go.mod
+++ b/go.mod
@ -3,9 +3,7 @@ module opendev.org/airship/kubernetes-entrypoint
 go 1.12

 require (
-	github.com/ghodss/yaml v1.0.0 // indirect
-	github.com/golangci/golangci-lint v1.17.1
-	github.com/google/btree v1.0.0 // indirect
+	github.com/golangci/golangci-lint v1.18.0
 	github.com/onsi/ginkgo v1.10.1
 	github.com/onsi/gomega v1.7.0
 	golang.org/x/time v0.0.0-20190921001708-c4c64cad1fd0 // indirect
--- a/go.sum
+++ b/go.sum
@ -11,64 +11,36 @@ github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbt
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2 h1:HTOmFEEYrWi4MW5ZKUx6xfeyM10Sx3kQF65xiQJMPYA=
-github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
-github.com/OpenPeeDeeP/depguard v1.0.1 h1:VlW4R6jmBIv3/u1JNlawEvJMM4J+dPORPaZasQee8Us=
-github.com/OpenPeeDeeP/depguard v1.0.1/go.mod h1:xsIw86fROiiwelg+jB2uM9PiKihMMmUx/1V+TNhjQvM=
+github.com/OpenPeeDeeP/depguard v1.0.0 h1:k9QF73nrHT3nPLz3lu6G5s+3Hi8Je36ODr1F5gjAXXM=
+github.com/OpenPeeDeeP/depguard v1.0.0/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
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@ -170,39 +126,29 @@ github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw=
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@ -211,44 +157,25 @@ github.com/klauspost/compress v1.4.0/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0
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@ -258,16 +185,11 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
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@ -281,36 +203,17 @@ github.com/onsi/gomega v1.7.0 h1:XPnZz8VVBHjVsy1vzJmRwIcSwiUO+JFfrv/xGiigmME=
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 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190812203447-cdfb69ac37fc h1:gkKoSkUmnU6bpS/VhkuO27bzQeSA51uaEfbOW5dNb68=
 golang.org/x/net v0.0.0-20190812203447-cdfb69ac37fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190909003024-a7b16738d86b h1:XfVGCX+0T4WOStkaOsJRllbsiImhB2jgVBGc9L0lPGc=
-golang.org/x/net v0.0.0-20190909003024-a7b16738d86b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be h1:vEDujvNQGv4jgYKudGeI/+DAX4Jffq6hpD55MmoEvKs=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@ -441,24 +296,16 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20171026204733-164713f0dfce/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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-golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20190209173611-3b5209105503/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c h1:+EXw7AwNOKzPFXMZ1yNjO40aWCh3PIquJB2fYlv9wcs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f h1:25KHgbfyiSm6vwQLbM3zZIe1v9p/3ea4Rz+nnM5K/i4=
 golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190911201528-7ad0cfa0b7b5 h1:SW/0nsKCUaozCUtZTakri5laocGx/5bkDSSLrFUsa5s=
-golang.org/x/sys v0.0.0-20190911201528-7ad0cfa0b7b5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.0.0-20170915090833-1cbadb444a80/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
@ -467,13 +314,10 @@ golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
-golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190921001708-c4c64cad1fd0 h1:xQwXv67TxFo9nC1GJFyab5eq/5B590r6RlnL/G8Sz7w=
 golang.org/x/time v0.0.0-20190921001708-c4c64cad1fd0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20170915040203-e531a2a1c15f/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181011042414-1f849cf54d09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@ -489,12 +333,8 @@ golang.org/x/tools v0.0.0-20190322203728-c1a832b0ad89/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190521203540-521d6ed310dd/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b h1:mSUCVIwDx4hfXJfWsOPfdzEHxzb2Xjl6BQ8YgPnazQA=
 golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190719005602-e377ae9d6386/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
-golang.org/x/tools v0.0.0-20190910044552-dd2b5c81c578/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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+golang.org/x/tools v0.0.0-20190909030654-5b82db07426d h1:PhtdWYteEBebOX7KXm4qkIAVSUTHQ883/2hRB92r9lk=
+golang.org/x/tools v0.0.0-20190909030654-5b82db07426d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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@ -506,22 +346,19 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+gopkg.in/airbrake/gobrake.v2 v2.0.9 h1:7z2uVWwn7oVeeugY1DtlPAy5H+KYgB1KeKTnqjNatLo=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
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 gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
 gopkg.in/inf.v0 v0.9.0 h1:3zYtXIO92bvsdS3ggAdA8Gb4Azj0YU+TVY1uGYNFA8o=
 gopkg.in/inf.v0 v0.9.0/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
-gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
@ -531,22 +368,12 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-k8s.io/api v0.0.0-20181004124137-fd83cbc87e76 h1:cGc6jt7tNK7a2WfgNKjxjoU/UXXr9Q7JTqvCupZ+6+Y=
-k8s.io/api v0.0.0-20181004124137-fd83cbc87e76/go.mod h1:iuAfoD4hCxJ8Onx9kaTIt30j7jUFS00AXQi6QMi99vA=
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-k8s.io/client-go v9.0.0+incompatible h1:2kqW3X2xQ9SbFvWZjGEHBLlWc1LG9JIJNXWkuqwdZ3A=
-k8s.io/client-go v9.0.0+incompatible/go.mod h1:7vJpHMYJwNQCWgzmNV+VYUl1zCObLyodBc8nIyt8L5s=
-k8s.io/client-go v11.0.0+incompatible h1:LBbX2+lOwY9flffWlJM7f1Ct8V2SRNiMRDFeiwnJo9o=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
@ -559,10 +386,8 @@ mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed h1:WX1yoOaKQfddO/mLzdV4wp
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
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 mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34 h1:B1LAOfRqg2QUyCdzfjf46quTSYUTAK5OCwbh6pljHbM=
-mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
-mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f h1:Cq7MalBHYACRd6EesksG1Q8EoIAKOsiZviGKbOLIej4=
-mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f/go.mod h1:4G1h5nDURzA3bwVMZIVpwbkw+04kSxk3rAtzlimaUJw=
+mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34 h1:duVSyluuJA+u0BnkcLR01smoLrGgDTfWt5c8ODYG8fU=
+mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
 sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
 sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
--- a/kubernetes-entrypoint.go
+++ b/kubernetes-entrypoint.go
@ -5,6 +5,7 @@ import (

 	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/config"
 	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/container"
+	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/customresource"
 	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/daemonset"
 	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/job"
 	_ "opendev.org/airship/kubernetes-entrypoint/dependencies/pod"
--- a/mocks/client.go
+++ b/mocks/client.go
@ -1,19 +1,21 @@
 package mocks

 import (
-	appsv1 "k8s.io/client-go/kubernetes/typed/apps/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	v1apps "k8s.io/client-go/kubernetes/typed/apps/v1"
 	v1batch "k8s.io/client-go/kubernetes/typed/batch/v1"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
-
-	cli "opendev.org/airship/kubernetes-entrypoint/client"
 )

 type Client struct {
 	v1core.PodInterface
 	v1core.ServiceInterface
-	appsv1.DaemonSetInterface
+	v1apps.DaemonSetInterface
 	v1core.EndpointsInterface
 	v1batch.JobInterface
+
+	FakeCustomResource *unstructured.Unstructured
+	Err                error
 }

 func (c Client) Pods(namespace string) v1core.PodInterface {
@ -24,23 +26,28 @@ func (c Client) Services(namespace string) v1core.ServiceInterface {
 	return c.ServiceInterface
 }

-func (c Client) DaemonSets(namespace string) appsv1.DaemonSetInterface {
+func (c Client) DaemonSets(namespace string) v1apps.DaemonSetInterface {
 	return c.DaemonSetInterface
 }

 func (c Client) Endpoints(namespace string) v1core.EndpointsInterface {
 	return c.EndpointsInterface
 }
+
 func (c Client) Jobs(namespace string) v1batch.JobInterface {
 	return c.JobInterface
 }

-func NewClient() cli.ClientInterface {
-	return Client{
-		NewPClient(),
-		NewSClient(),
-		NewDSClient(),
-		NewEClient(),
-		NewJClient(),
+func (c Client) CustomResource(apiVersion, namespace, resource, name string) (*unstructured.Unstructured, error) {
+	return c.FakeCustomResource, c.Err
+}
+
+func NewClient() *Client {
+	return &Client{
+		PodInterface:       NewPClient(),
+		ServiceInterface:   NewSClient(),
+		DaemonSetInterface: NewDSClient(),
+		EndpointsInterface: NewEClient(),
+		JobInterface:       NewJClient(),
 	}
 }
--- a/mocks/entrypoint.go
+++ b/mocks/entrypoint.go
@ -1,32 +1,31 @@
 package mocks

 import (
-	cli "opendev.org/airship/kubernetes-entrypoint/client"
+	"opendev.org/airship/kubernetes-entrypoint/client"
 )

 type MockEntrypoint struct {
-	client    cli.ClientInterface
-	namespace string
+	MockClient *Client
+	namespace  string
 }

-func (m MockEntrypoint) Resolve() {
+func (m MockEntrypoint) Resolve() {}
+
+func (m MockEntrypoint) Client() client.ClientInterface {
+	return m.MockClient
 }

-func (m MockEntrypoint) Client() (client cli.ClientInterface) {
-	return m.client
-}
-
-func (m MockEntrypoint) GetNamespace() (namespace string) {
+func (m MockEntrypoint) GetNamespace() string {
 	return m.namespace
 }

-func NewEntrypointInNamespace(namespace string) MockEntrypoint {
-	return MockEntrypoint{
-		client:    NewClient(),
-		namespace: namespace,
+func NewEntrypointInNamespace(namespace string) *MockEntrypoint {
+	return &MockEntrypoint{
+		MockClient: NewClient(),
+		namespace:  namespace,
 	}
 }

-func NewEntrypoint() MockEntrypoint {
+func NewEntrypoint() *MockEntrypoint {
 	return NewEntrypointInNamespace("test")
 }
--- a/util/env/env.go
+++ b/util/env/env.go
@ -13,20 +13,28 @@ const (
 )

 type Dependency struct {
-	Name      string
-	Namespace string
+	Name      string `json:"name"`
+	Namespace string `json:"namespace"`
 }

 type PodDependency struct {
-	Labels          map[string]string
-	Namespace       string
-	RequireSameNode bool
+	Labels          map[string]string `json:"labels"`
+	Namespace       string            `json:"namespace"`
+	RequireSameNode bool              `json:"requireSameNode"`
 }

 type JobDependency struct {
-	Name      string
-	Labels    map[string]string
-	Namespace string
+	Name      string            `json:"name"`
+	Labels    map[string]string `json:"labels"`
+	Namespace string            `json:"namespace"`
+}
+
+type CustomResourceDependency struct {
+	APIVersion string              `json:"apiVersion"`
+	Name       string              `json:"name"`
+	Namespace  string              `json:"namespace"`
+	Kind       string              `json:"kind"`
+	Fields     []map[string]string `json:"fields"`
 }

 func SplitCommand() []string {
@ -144,8 +152,8 @@ func SplitJobEnvToDeps(env string, jsonEnv string) []JobDependency {

 //GetBaseNamespace returns default namespace when user set empty one
 func GetBaseNamespace() string {
-	namespace := os.Getenv("NAMESPACE")
-	if namespace == "" {
+	namespace, isSet := os.LookupEnv("NAMESPACE")
+	if !isSet || namespace == "" {
 		namespace = "default"
 	}
 	return namespace