Add/update/delete PrometheusRemoteEndpoint CR

PrometheusRemoteEndpoint CR when applied, a remote write endpoint 
is added/updated/deleted in prometheus.

Issue-ID: ONAPARC-393
Signed-off-by: Srivahni <srivahni.chivukula@intel.com>
Change-Id: I8cdc0b673b35be3457a2b12c6769cd3cf62ac6c5

1 files changed, 77 insertions, 0 deletions

diff --git a/vnfs/DAaaS/microservices/remote-config-operator/pkg/controller/utils/remoteconfigutils.go b/vnfs/DAaaS/microservices/remote-config-operator/pkg/controller/utils/remoteconfigutils.go
new file mode 100644
index 00000000..8508a8e6
--- /dev/null
+++ b/vnfs/DAaaS/microservices/remote-config-operator/pkg/controller/utils/remoteconfigutils.go
@@ -0,0 +1,77 @@
+/*
+Copyright 2019 Intel Corporation.
+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 utils
+
+import (
+	"context"
+	"fmt"
+	"os"
+	onapv1alpha1 "remote-config-operator/pkg/apis/onap/v1alpha1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+const (
+	defaultWatchLabel     = "remote=m3db1"
+	WatchLabelsEnvVar     = "WATCH_LABELS"
+	RemoteConfigFinalizer = "finalizer.remoteConfig.onap.org"
+)
+
+// GetWatchLabels returns the labels the operator should be watching for changes
+func GetWatchLabels() (string, error) {
+	labelSelector, found := os.LookupEnv(WatchLabelsEnvVar)
+	if !found {
+		return defaultWatchLabel, fmt.Errorf("%s must be set", WatchLabelsEnvVar)
+	}
+	return labelSelector, nil
+}
+
+// GetPrometheusRemoteEndpoint returns the prometheusRemoteEndpoint instance in the namespace ns
+func GetPrometheusRemoteEndpoint(rc client.Client, ns string) (*onapv1alpha1.PrometheusRemoteEndpoint, error) {
+	// Get the PrometheusRemoteEndpoint instance in current namespace to rebuild conf.
+	preList := &onapv1alpha1.PrometheusRemoteEndpointList{}
+	preOpts := []client.ListOption{
+		client.InNamespace("edge1"),
+		client.MatchingLabels{"remote": "m3db1"},
+	}
+
+	err := rc.List(context.TODO(), preList, preOpts...)
+	if err != nil {
+		return nil, err
+	}
+	if preList.Items == nil || len(preList.Items) == 0 {
+		return nil, err
+	}
+	prometheusRemoteEndpoint := &preList.Items[0]
+	return prometheusRemoteEndpoint, nil
+}
+
+// Contains checks if a string is contained in a list of strings
+func Contains(list []string, s string) bool {
+	for _, v := range list {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}
+
+// Remove checks and removes a string from a list of strings
+func Remove(list []string, s string) []string {
+	for i, v := range list {
+		if v == s {
+			list = append(list[:i], list[i+1:]...)
+		}
+	}
+	return list
+}