KubernetesClientAuthenticationProvider.java

/*
 * Copyright 2018-2019 the original author or 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
 *
 *      https://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 org.springframework.cloud.config.server.environment.vault.authentication;

import org.springframework.cloud.config.server.environment.VaultEnvironmentProperties;
import org.springframework.cloud.config.server.environment.VaultEnvironmentProperties.AuthenticationMethod;
import org.springframework.cloud.config.server.environment.vault.SpringVaultClientAuthenticationProvider;
import org.springframework.util.Assert;
import org.springframework.vault.authentication.ClientAuthentication;
import org.springframework.vault.authentication.KubernetesAuthentication;
import org.springframework.vault.authentication.KubernetesAuthenticationOptions;
import org.springframework.vault.authentication.KubernetesServiceAccountTokenFile;
import org.springframework.web.client.RestOperations;

public class KubernetesClientAuthenticationProvider extends SpringVaultClientAuthenticationProvider {

	public KubernetesClientAuthenticationProvider() {
		super(AuthenticationMethod.KUBERNETES);
	}

	@Override
	public ClientAuthentication getClientAuthentication(VaultEnvironmentProperties vaultProperties,
			RestOperations vaultRestOperations, RestOperations externalRestOperations) {

		VaultEnvironmentProperties.KubernetesProperties kubernetes = vaultProperties.getKubernetes();

		Assert.hasText(kubernetes.getRole(),
				missingPropertyForAuthMethod("kubernetes.role", AuthenticationMethod.KUBERNETES));
		Assert.hasText(kubernetes.getServiceAccountTokenFile(),
				missingPropertyForAuthMethod("kubernetes.service-account-token-file", AuthenticationMethod.KUBERNETES));

		KubernetesAuthenticationOptions options = KubernetesAuthenticationOptions.builder()
				.path(kubernetes.getKubernetesPath()).role(kubernetes.getRole())
				.jwtSupplier(new KubernetesServiceAccountTokenFile(kubernetes.getServiceAccountTokenFile())).build();

		return new KubernetesAuthentication(options, vaultRestOperations);
	}

}