cloudflow.runner.RunnerConfigResolver.scala Maven / Gradle / Ivy
/*
* Copyright (C) 2016-2020 Lightbend 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 cloudflow.runner
import java.nio.file._
import com.typesafe.config._
import scala.util.Try
trait RunnerConfigResolver {
final val ConfigMountPath = "/etc/cloudflow-runner"
final val ConfigFile = "application.conf"
final val ConfigSecretMountPath = "/etc/cloudflow-runner-secret"
final val SecretConfigFile = "secret.conf"
def makeConfig: Try[Config] = Try {
val configFilePathString = Option(System.getProperty("config.file")).getOrElse(s"$ConfigMountPath/$ConfigFile")
val configPath = Paths.get(configFilePathString)
val secretPath = Paths.get(s"$ConfigSecretMountPath/$SecretConfigFile")
val config = if (Files.exists(secretPath)) {
println(s"Loading application.conf from: $configPath, secret config from: $secretPath")
// secret takes precedence, since it contains config.
loadConfig(secretPath)
.withFallback(loadConfig(configPath))
.withFallback(ConfigFactory.load)
} else {
println(s"Loading application.conf from: $configPath")
loadConfig(configPath)
.withFallback(ConfigFactory.load)
}
config
}
private def loadConfig(configPath: Path): Config =
ConfigFactory.parseFile(configPath.toFile)
}