List logs

Demonstrates how to list the names of available Logs.

Code sample

Go

To learn how to install and use the client library for Logging, see Logging client libraries.

To authenticate to Logging, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/logging/logadmin"
	"google.golang.org/api/iterator"
)

// listLogs lists all available logs in the project.
func listLogs(w io.Writer, projectID string) error {
	ctx := context.Background()

	client, err := logadmin.NewClient(ctx, projectID)
	if err != nil {
		return err
	}
	defer client.Close()

	iter := client.Logs(ctx)
	for {
		log, err := iter.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return fmt.Errorf("List logs failed: %w", err)
		}
		fmt.Fprintf(w, "%s\n", log)
	}
	return nil
}

Java

To learn how to install and use the client library for Logging, see Logging client libraries.

To authenticate to Logging, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.api.gax.paging.Page;
import com.google.cloud.logging.Logging;
import com.google.cloud.logging.LoggingOptions;

public class ListLogs {

  public static void main(String... args) throws Exception {

    try (Logging logging = LoggingOptions.getDefaultInstance().getService()) {

      // List all log names
      Page<String> logNames = logging.listLogs();
      while (logNames != null) {
        for (String logName : logNames.iterateAll()) {
          System.out.println(logName);
        }
        logNames = logNames.getNextPage();
      }
    }
  }
}

Node.js

To learn how to install and use the client library for Logging, see Logging client libraries.

To authenticate to Logging, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Imports the Google Cloud client library
const {Logging} = require('@google-cloud/logging');

// Creates a client
const logging = new Logging();

async function printLogNames() {
  const [logs] = await logging.getLogs();
  console.log('Logs:');
  logs.forEach(log => {
    console.log(log.name);
  });
}
printLogNames();

Python

To learn how to install and use the client library for Logging, see Logging client libraries.

To authenticate to Logging, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from typing import List
from google.cloud import logging_v2


def list_logs(project_id: str) -> List[str]:
    """Lists all logs in a project.

    Args:
        project_id: the ID of the project

    Returns:
        A list of log names.
    """
    client = logging_v2.services.logging_service_v2.LoggingServiceV2Client()
    request = logging_v2.types.ListLogsRequest(
        parent=f"projects/{project_id}",
    )

    logs = client.list_logs(request=request)
    for log in logs:
        print(log)

    return logs

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser.