org.eclipse.che.infrastructure.docker.client.DockerRegistryChecker Maven / Gradle / Ivy
/*
* Copyright (c) 2012-2018 Red Hat, Inc.
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Red Hat, Inc. - initial API and implementation
*/
package org.eclipse.che.infrastructure.docker.client;
import static com.google.common.base.Strings.isNullOrEmpty;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import org.eclipse.che.commons.annotation.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Checks that docker registry is available.
*
* @author Yevhenii Voevodin
* @author Alexander Andrienko
*/
@Singleton
public class DockerRegistryChecker {
private static final Logger LOG = LoggerFactory.getLogger(DockerRegistryChecker.class);
@Inject
@Nullable
@Named("che.docker.registry")
private String machineDockerRegistry;
/** Checks that registry is available and if it is not - logs warning message. */
@PostConstruct
private void checkRegistryIsAvailable() throws IOException {
if (!isNullOrEmpty(machineDockerRegistry)) {
String registryUrl = "http://" + machineDockerRegistry;
LOG.info("Probing registry '{}'", registryUrl);
final HttpURLConnection conn = (HttpURLConnection) new URL(registryUrl).openConnection();
conn.setConnectTimeout(30 * 1000);
try {
final int responseCode = conn.getResponseCode();
LOG.info(
"Probe of registry '{}' succeed with HTTP response code '{}'",
registryUrl,
responseCode);
} catch (IOException ioEx) {
LOG.warn(
"Docker registry {} is not available, "
+ "which means that you won't be able to save snapshots of your workspaces."
+ "\nHow to configure registry?"
+ "\n\tLocal registry -> https://docs.docker.com/registry/"
+ "\n\tRemote registry -> set up 'che.docker.registry.auth.*' properties",
registryUrl);
} finally {
conn.disconnect();
}
}
}
}