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env_var_loader.go
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/
env_var_loader.go
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// Copyright (c) 2016-2017 Tigera, Inc. All rights reserved.
//
// 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 (
"strings"
log "github.com/sirupsen/logrus"
)
// LoadConfigFromEnvironment extracts raw config parameters (identified by
// case-insensitive prefix "felix_") from the given OS environment variables.
// An environment entry of "FELIX_FOO=bar" is translated to "foo": "bar".
func LoadConfigFromEnvironment(environ []string) map[string]string {
result := make(map[string]string)
for _, kv := range environ {
splits := strings.SplitN(kv, "=", 2)
if len(splits) < 2 {
log.Warningf("Ignoring malformed environment variable: %#v",
kv)
continue
}
key := strings.ToLower(splits[0])
value := splits[1]
if strings.Index(key, "felix_") == 0 {
splits = strings.SplitN(key, "_", 2)
paramName := splits[1]
log.Infof("Found felix environment variable: %#v=%#v",
paramName, value)
result[paramName] = value
}
}
return result
}