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authorKiran Kamineni <kiran.k.kamineni@intel.com>2019-04-18 16:38:20 -0700
committerKiran Kamineni <kiran.k.kamineni@intel.com>2019-04-19 15:48:48 -0700
commit42f8f006ab01692d7de9cecc06521eaf58743c0d (patch)
tree03bc5fe0dd662cec4c36e2b67da84cfd30602950 /src/k8splugin/internal/config/config.go
parent5414c23063815207c68bfc7398561cec7409c963 (diff)
Move configuration into config files
Move k8splugin configuration into config files instead of using environment variables. Issue-ID: MULTICLOUD-579 Change-Id: I7b76d5a14d24f002a8db484097a31fb5e908b6f8 Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>
Diffstat (limited to 'src/k8splugin/internal/config/config.go')
-rw-r--r--src/k8splugin/internal/config/config.go128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/k8splugin/internal/config/config.go b/src/k8splugin/internal/config/config.go
new file mode 100644
index 00000000..c3ca9054
--- /dev/null
+++ b/src/k8splugin/internal/config/config.go
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2019 Intel Corporation, Inc
+ *
+ * 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 config
+
+import (
+ "encoding/json"
+ "log"
+ "os"
+ "reflect"
+)
+
+// Configuration loads up all the values that are used to configure
+// backend implementations
+type Configuration struct {
+ CAFile string `json:"ca-file"`
+ ServerCert string `json:"server-cert"`
+ ServerKey string `json:"server-key"`
+ Password string `json:"password"`
+ DatabaseAddress string `json:"database-address"`
+ DatabaseType string `json:"database-type"`
+ PluginDir string `json:"plugin-dir"`
+ EtcdIP string `json:"etcd-ip"`
+ EtcdCert string `json:"etcd-cert"`
+ EtcdKey string `json:"etcd-key"`
+ EtcdCAFile string `json:"etcd-ca-file"`
+ KubeConfigDir string `json:"kube-config-dir"`
+ OVNCentralAddress string `json:"ovn-central-address"`
+}
+
+// Config is the structure that stores the configuration
+var gConfig *Configuration
+
+// readConfigFile reads the specified smsConfig file to setup some env variables
+func readConfigFile(file string) (*Configuration, error) {
+ f, err := os.Open(file)
+ if err != nil {
+ return defaultConfiguration(), err
+ }
+ defer f.Close()
+
+ // Setup some defaults here
+ // If the json file has values in it, the defaults will be overwritten
+ conf := defaultConfiguration()
+
+ // Read the configuration from json file
+ decoder := json.NewDecoder(f)
+ err = decoder.Decode(conf)
+ if err != nil {
+ return conf, err
+ }
+
+ return conf, nil
+}
+
+func defaultConfiguration() *Configuration {
+ cwd, err := os.Getwd()
+ if err != nil {
+ log.Println("Error getting cwd. Using .")
+ cwd = "."
+ }
+
+ return &Configuration{
+ CAFile: "ca.cert",
+ ServerCert: "server.cert",
+ ServerKey: "server.key",
+ Password: "",
+ DatabaseAddress: "127.0.0.1",
+ DatabaseType: "mongo",
+ PluginDir: cwd,
+ EtcdIP: "127.0.0.1",
+ EtcdCert: "etcd.cert",
+ EtcdKey: "etcd.key",
+ EtcdCAFile: "etcd-ca.cert",
+ KubeConfigDir: cwd,
+ OVNCentralAddress: "127.0.0.1",
+ }
+}
+
+// GetConfiguration returns the configuration for the app.
+// It will try to load it if it is not already loaded.
+func GetConfiguration() *Configuration {
+ if gConfig == nil {
+ conf, err := readConfigFile("k8sconfig.json")
+ if err != nil {
+ log.Println("Error loading config file. Using defaults.")
+ }
+ gConfig = conf
+ }
+
+ return gConfig
+}
+
+// SetConfigValue sets a value in the configuration
+// This is mostly used to customize the application and
+// should be used carefully.
+func SetConfigValue(key string, value string) *Configuration {
+ c := GetConfiguration()
+ if value == "" || key == "" {
+ return c
+ }
+
+ v := reflect.ValueOf(c).Elem()
+ if v.Kind() == reflect.Struct {
+ f := v.FieldByName(key)
+ if f.IsValid() {
+ if f.CanSet() {
+ if f.Kind() == reflect.String {
+ f.SetString(value)
+ }
+ }
+ }
+ }
+ return c
+}