/**
* @return A Builder with its Docker Client configured automatically using the <code>DOCKER_HOST
* </code> and <code>DOCKER_CERT_PATH</code> environment variables, or sensible defaults if
* they are absent.
*/
public static Builder fromEnv() {
try {
DefaultDockerClient.fromEnv().uri();
return builder().dockerClient(DefaultDockerClient.fromEnv().build());
} catch (DockerCertificateException e) {
throw new RuntimeException("unable to create Docker client from environment", e);
}
}
public static DockerClient buildDockerClient(String dockerEndPointUrl)
throws CarbonKernelHandlerException {
/*
implements the singleton design pattern on the DockerClient instance
*/
try {
if (DOCKER_CLIENT == null) {
if (dockerEndPointUrl == null) {
DOCKER_CLIENT = DefaultDockerClient.fromEnv().build();
} else {
DOCKER_CLIENT = DefaultDockerClient.builder().uri(dockerEndPointUrl).build();
}
}
} catch (DockerCertificateException exception) {
String message = "Could not create the Docker Client instance.";
LOG.error(message, exception);
throw new CarbonKernelHandlerException(message, exception);
}
return DOCKER_CLIENT;
}