Besides downloading log files from the Cloud Platform interface or accessing logs using command-line tools, you can also stream logs in real time using the Cloud Platform interface on the Applications > [Environment] > Logs page. The Logs page stream shows log entries from all the logs of an environment at once. In contrast, each of the log files you can download shows a single log from an infrastructure (aside from the Drupal watchdog log and the MySQL slow query log).
There are several methods you can use to modify which log entries are streamed:
Click Stream to select which logs are the source of log entries to be streamed. By default, the PHP error and Apache error logs are enabled.
- Filter the log stream using JavaScript regular expressions. Type a regular expression and the log stream is filtered accordingly.
- If you click a log entry or scroll down the log stream, new entries are not added to the display. Click Show new messages to return to the top of the log stream and show the most recent log entries.
- Click Pause to pause the log stream, and Restart to restart the log stream. When you restart the log stream after pausing it, the Logs page displays current log entries and doesn’t display all the entries that occurred while it was paused.
- To clear all the log entries, click Clear.
To download a log file, select Logs > Download. For more information, see Downloading active log files.
Color coding for log entries
Log entries are displayed with different colored bars at the left margin:
| Log source | Bar color |
|---|---|
| Apache error | Red |
| Apache request | Yellow |
| Balancer request | Green |
| Drupal request | Yellow |
| MySQL slow query | Red |
| Node.js error | Red |
| PHP error | Red |
| Varnish® request | Green |
Streaming logs from the command line
In addition to streaming logs on the Logs page, you can use the Logstream Ruby gem, which provides a client-side API library and command-line interface. Learn more about how to install and use Logstream.