Enabling multi-tenancy for fission objects. (#655)

This feature allows creation of fission objects in different namespaces, in addition to retaining the existing behavior of creating fission objects in default namespace if user doesnt provide one. 
It also removes cluster admin roles for fission-fetcher and fission-builder Service Accounts and grants them only those privileges that they need.

controller/client/core.go

@@ -0,0 +1,74 @@
+/*
+Copyright 2016 The Fission Authors.
+
+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 client
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	apiv1 "k8s.io/client-go/pkg/api/v1"
+)
+
+func (c *Client) SecretGet(m *metav1.ObjectMeta) (*apiv1.Secret, error) {
+	relativeUrl := fmt.Sprintf("secrets/%v", m.Name)
+	relativeUrl += fmt.Sprintf("?namespace=%v", m.Namespace)
+
+	resp, err := http.Get(c.url(relativeUrl))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := c.handleResponse(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	var secret apiv1.Secret
+	err = json.Unmarshal(body, &secret)
+	if err != nil {
+		return nil, err
+	}
+
+	return &secret, nil
+}
+
+func (c *Client) ConfigMapGet(m *metav1.ObjectMeta) (*apiv1.ConfigMap, error) {
+	relativeUrl := fmt.Sprintf("configmaps/%v", m.Name)
+	relativeUrl += fmt.Sprintf("?namespace=%v", m.Namespace)
+
+	resp, err := http.Get(c.url(relativeUrl))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := c.handleResponse(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	var configMap apiv1.ConfigMap
+	err = json.Unmarshal(body, &configMap)
+	if err != nil {
+		return nil, err
+	}
+
+	return &configMap, nil
+}

controller/client/environment.go

@@ -121,8 +121,9 @@ func (c *Client) EnvironmentDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) EnvironmentList() ([]crd.Environment, error) {
-	resp, err := http.Get(c.url("environments"))
+func (c *Client) EnvironmentList(ns string) ([]crd.Environment, error) {
+	relativeUrl := fmt.Sprintf("environments?namespace=%v", ns)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}

controller/client/function.go

@@ -134,8 +134,9 @@ func (c *Client) FunctionDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) FunctionList() ([]crd.Function, error) {
-	resp, err := http.Get(c.url("functions"))
+func (c *Client) FunctionList(functionNamespace string) ([]crd.Function, error) {
+	relativeUrl := fmt.Sprintf("functions?namespace=%v", functionNamespace)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}

controller/client/httptrigger.go

@@ -120,8 +120,9 @@ func (c *Client) HTTPTriggerDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) HTTPTriggerList() ([]crd.HTTPTrigger, error) {
-	resp, err := http.Get(c.url("triggers/http"))
+func (c *Client) HTTPTriggerList(triggerNamespace string) ([]crd.HTTPTrigger, error) {
+	relativeUrl := fmt.Sprintf("triggers/http?namespace=%v", triggerNamespace)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}

controller/client/kuberneteswatchtrigger.go

@@ -94,8 +94,9 @@ func (c *Client) WatchDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) WatchList() ([]crd.KubernetesWatchTrigger, error) {
-	resp, err := http.Get(c.url("watches"))
+func (c *Client) WatchList(ns string) ([]crd.KubernetesWatchTrigger, error) {
+	relativeUrl := fmt.Sprintf("watches?namespace=%v", ns)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}

controller/client/mqtrigger.go

@@ -120,11 +120,11 @@ func (c *Client) MessageQueueTriggerDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) MessageQueueTriggerList(mqType string) ([]crd.MessageQueueTrigger, error) {
+func (c *Client) MessageQueueTriggerList(mqType string, ns string) ([]crd.MessageQueueTrigger, error) {
 	relativeUrl := "triggers/messagequeue"
 	if len(mqType) > 0 {
 		// TODO remove this, replace with field selector
-		relativeUrl += fmt.Sprintf("?mqtype=%v", mqType)
+		relativeUrl += fmt.Sprintf("?mqtype=%v&namespace=%v", mqType, ns)
 	}
 
 	resp, err := http.Get(c.url(relativeUrl))

controller/client/package.go

@@ -120,8 +120,9 @@ func (c *Client) PackageDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) PackageList() ([]crd.Package, error) {
-	resp, err := http.Get(c.url("packages"))
+func (c *Client) PackageList(pkgNamespace string) ([]crd.Package, error) {
+	relativeUrl := fmt.Sprintf("packages?namespace=%v", pkgNamespace)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}

controller/client/timetrigger.go

@@ -120,8 +120,9 @@ func (c *Client) TimeTriggerDelete(m *metav1.ObjectMeta) error {
 	return c.delete(relativeUrl)
 }
 
-func (c *Client) TimeTriggerList() ([]crd.TimeTrigger, error) {
-	resp, err := http.Get(c.url("triggers/time"))
+func (c *Client) TimeTriggerList(ns string) ([]crd.TimeTrigger, error) {
+	relativeUrl := fmt.Sprintf("triggers/time?namespace=%v", ns)
+	resp, err := http.Get(c.url(relativeUrl))
 	if err != nil {
 		return nil, err
 	}