Écrire des journaux structurés

Explique comment écrire une entrée de journal.

Pages de documentation incluant cet exemple de code

Pour afficher l'exemple de code utilisé en contexte, consultez la documentation suivante :

Exemple de code

C#

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

private void WriteLogEntry(string logId, string message)
{
    var client = LoggingServiceV2Client.Create();
    LogName logName = new LogName(s_projectId, logId);
    LogEntry logEntry = new LogEntry
    {
        LogNameAsLogName = logName,
        Severity = LogSeverity.Info,
        TextPayload = $"{typeof(LoggingSample).FullName} - {message}"
    };
    MonitoredResource resource = new MonitoredResource { Type = "global" };
    IDictionary<string, string> entryLabels = new Dictionary<string, string>
    {
        { "size", "large" },
        { "color", "red" }
    };
    client.WriteLogEntries(logName, resource, entryLabels,
        new[] { logEntry }, _retryAWhile);
    Console.WriteLine($"Created log entry in log-id: {logId}.");
}

Go

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

const name = "log-example"
logger := client.Logger(name)
defer logger.Flush() // Ensure the entry is written.

logger.Log(logging.Entry{
	// Log anything that can be marshaled to JSON.
	Payload: struct{ Anything string }{
		Anything: "The payload can be any type!",
	},
	Severity: logging.Debug,
})

Java

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

List<LogEntry> entries = new ArrayList<>();
entries.add(LogEntry.of(StringPayload.of("Entry payload")));
Map<String, Object> jsonMap = new HashMap<>();
jsonMap.put("key", "value");
entries.add(LogEntry.of(JsonPayload.of(jsonMap)));
logging.write(
    entries,
    WriteOption.logName(logName),
    WriteOption.resource(MonitoredResource.newBuilder("global").build()));

Node.js

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

const {Logging} = require('@google-cloud/logging');
const logging = new Logging();

/**
 * TODO(developer): Uncomment the following line and replace with your values.
 */
// const logName = 'my-log';
const log = logging.log(logName);

// A text log entry
const text_entry = log.entry('Hello world!');

// A json log entry with additional context
const metadata = {
  severity: 'WARNING',
  labels: {
    foo: 'bar',
  },
  // A default log resource is added for some GCP environments
  // This log resource can be overwritten per spec:
  // https://cloud.google.com/logging/docs/reference/v2/rest/v2/MonitoredResource
  resource: {
    type: 'global',
  },
};

const message = {
  name: 'King Arthur',
  quest: 'Find the Holy Grail',
  favorite_color: 'Blue',
};

const json_Entry = log.entry(metadata, message);

async function writeLogEntry() {
  // Asynchronously write the log entry
  await log.write(text_entry);

  // Asynchronously batch write the log entries
  await log.write([text_entry, json_Entry]);

  // Let the logging library dispatch logs
  log.write(text_entry);

  console.log(`Wrote to ${logName}`);
}
writeLogEntry();

PHP

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

use Google\Cloud\Logging\LoggingClient;

/** Write a log message via the Stackdriver Logging API.
 *
 * @param string $projectId The Google project ID.
 * @param string $loggerName The name of the logger.
 * @param string $message The log message.
 */
function write_log($projectId, $loggerName, $message)
{
    $logging = new LoggingClient(['projectId' => $projectId]);
    $logger = $logging->logger($loggerName, [
        'resource' => [
            'type' => 'gcs_bucket',
            'labels' => [
                'bucket_name' => 'my_bucket'
            ]
        ]
    ]);
    $entry = $logger->entry($message);
    $logger->write($entry);
    printf("Wrote a log to a logger '%s'." . PHP_EOL, $loggerName);
}

Python

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

def write_entry(logger_name):
    """Writes log entries to the given logger."""
    logging_client = logging.Client()

    # This log can be found in the Cloud Logging console under 'Custom Logs'.
    logger = logging_client.logger(logger_name)

    # Make a simple text log
    logger.log_text("Hello, world!")

    # Simple text log with severity.
    logger.log_text("Goodbye, world!", severity="ERROR")

    # Struct log. The struct can be any JSON-serializable dictionary.
    logger.log_struct(
        {
            "name": "King Arthur",
            "quest": "Find the Holy Grail",
            "favorite_color": "Blue",
        }
    )

    print("Wrote logs to {}.".format(logger.name))

Ruby

Pour savoir comment installer et utiliser la bibliothèque cliente pour Logging, consultez la page Bibliothèques clientes Logging.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

entry = logging.entry
# payload = "The data you want to log"
entry.payload = payload
# log_name = "The name of the log to write to"
entry.log_name = log_name
entry.severity = :NOTICE
entry.resource.type = "gae_app"
entry.resource.labels[:module_id] = "default"
entry.resource.labels[:version_id] = "20160101t163030"

logging.write_entries entry
puts "Wrote payload: #{entry.payload} to log: #{entry.log_name}"

Étape suivante

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