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Implement Elasticsearch / OpenSearch storage auto detection to pick t…
…he right job instance Signed-off-by: Andriy Redko <[email protected]>
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144 changes: 144 additions & 0 deletions
144
main/src/main/java/zipkin2/dependencies/ZipkinElasticsearchStorage.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| /* | ||
| * Copyright The OpenZipkin Authors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
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| package zipkin2.dependencies; | ||
|
|
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| import java.io.IOException; | ||
| import java.net.Authenticator; | ||
| import java.net.PasswordAuthentication; | ||
| import java.net.URI; | ||
| import java.net.http.HttpClient; | ||
| import java.net.http.HttpRequest; | ||
| import java.net.http.HttpResponse; | ||
| import java.net.http.HttpResponse.BodyHandlers; | ||
| import java.security.KeyManagementException; | ||
| import java.security.NoSuchAlgorithmException; | ||
| import java.security.SecureRandom; | ||
| import java.security.cert.X509Certificate; | ||
| import java.time.Duration; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
|
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| import javax.net.ssl.SSLContext; | ||
| import javax.net.ssl.TrustManager; | ||
| import javax.net.ssl.X509TrustManager; | ||
|
|
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| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| final class ZipkinElasticsearchStorage { | ||
| private static final Logger LOG = LoggerFactory.getLogger(ZipkinElasticsearchStorage.class); | ||
| private static final Pattern DISTRIBUTION = Pattern.compile("\"distribution\"\s*[:]\s*\"([^\"]+)\""); | ||
|
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| static final String HOSTS = getEnv("ES_HOSTS", "127.0.0.1"); | ||
| static final String USERNAME = getEnv("ES_USERNAME", null); | ||
| static final String PASSWORD = getEnv("ES_PASSWORD", null); | ||
|
|
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| static TrustManager[] TRUST_ALL = new TrustManager [] { | ||
| new X509TrustManager() { | ||
| @Override | ||
| public X509Certificate[] getAcceptedIssuers() { | ||
| return null; | ||
| } | ||
|
|
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| @Override | ||
| public void checkClientTrusted(X509Certificate[] certs, String authType) { | ||
| } | ||
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| @Override | ||
| public void checkServerTrusted(X509Certificate[] certs, String authType) { | ||
| } | ||
| } | ||
| }; | ||
|
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| static String flavor() { | ||
| final HttpClient.Builder builder = HttpClient | ||
| .newBuilder() | ||
| .connectTimeout(Duration.ofSeconds(5)); | ||
|
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| if (USERNAME != null && PASSWORD != null) { | ||
| builder.authenticator(new Authenticator() { | ||
| @Override | ||
| protected PasswordAuthentication getPasswordAuthentication() { | ||
| return new PasswordAuthentication(USERNAME, PASSWORD.toCharArray()); | ||
| } | ||
| }); | ||
| } | ||
|
|
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| try { | ||
| final SSLContext sslContext = SSLContext.getInstance("TLS"); | ||
| sslContext.init(null, TRUST_ALL, new SecureRandom()); | ||
|
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| final HttpClient client = builder.sslContext(sslContext).build(); | ||
| try { | ||
| for (String host: parseHosts(HOSTS)) { | ||
| final HttpRequest request = HttpRequest.newBuilder().GET().uri(URI.create(host)).build(); | ||
| try { | ||
| final HttpResponse<String> response = client.send(request, BodyHandlers.ofString()); | ||
| final Matcher matcher = DISTRIBUTION.matcher(response.body()); | ||
| if (matcher.find()) { | ||
| return matcher.group(1).toLowerCase(); | ||
| } | ||
| } catch (InterruptedException | IOException ex) { | ||
| LOG.warn("Unable issue HTTP GET request to '" + host + "'", ex); | ||
| } | ||
| } | ||
| } finally { | ||
| if (client instanceof AutoCloseable) { | ||
| try { | ||
| // Since JDK-21, the HttpClient is AutoCloseable | ||
| ((AutoCloseable) client).close(); | ||
| } catch (Exception ex) { | ||
| /* Ignore */ | ||
| } | ||
| } | ||
| } | ||
| } catch (final NoSuchAlgorithmException | KeyManagementException ex) { | ||
| LOG.warn("Unable to configure HttpClient", ex); | ||
| } | ||
|
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| return "elasticsearch"; | ||
| } | ||
|
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| private static String getEnv(String key, String defaultValue) { | ||
| String result = System.getenv(key); | ||
| return result != null && !result.isEmpty() ? result : defaultValue; | ||
| } | ||
|
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| static String[] parseHosts(String hosts) { | ||
| final String[] hostParts = hosts.split(",", -1); | ||
|
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| // Detect default scheme to use if not specified | ||
| String defaultScheme = "http"; | ||
| for (int i = 0; i < hostParts.length; i++) { | ||
| String host = hostParts[i]; | ||
| if (host.startsWith("https")) { | ||
| defaultScheme = "https"; | ||
| break; | ||
| } | ||
| } | ||
|
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| Collection<String> list = new ArrayList<>(); | ||
| for (int i = 0; i < hostParts.length; i++) { | ||
| String host = hostParts[i]; | ||
| URI httpUri = host.startsWith("http") ? URI.create(host) : URI.create(defaultScheme + "://" + host); | ||
|
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| int port = httpUri.getPort(); | ||
| if (port == -1) { | ||
| port = 9200; /* default Elasticsearch / OpenSearch port */ | ||
| } | ||
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| list.add(httpUri.getScheme() + "://" + httpUri.getHost() + ":" + port); | ||
| } | ||
|
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| return list.toArray(new String[0]); | ||
| } | ||
|
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| public static void main(String[] s) { | ||
| System.out.println(flavor()); | ||
| } | ||
| } |
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