Deriving insights from logs
Get to the root cause of an issue by using out-of-the-box options such as queries, time range, fields, and so on. For example, you observed multiple log entries with 401 status in your Apache logs. A few of such entries might mean that users forgot their passwords. However, multiple entries from same IP address in a short time span might mean a security threat. Use the search options and narrow down the results to find the root cause. For quick references, add the filtered logs to dashboards.
The following video (2:53) illustrates how to analyze and visualize logs:
Search and analyze logs on the Explorer > Discover tab. The following figure highlights the important features of the page that help you in getting to the root cause of an issue.
Let's explore these features in detail.
Index patterns overview
By default, an index pattern is created for your tennant. All the logs are collected under this index pattern. You can neither delete this index pattern nor create a new one.
Using the Search field
Filters will help you further refine the search results. Add filters on the basis of field values. For example, filter all log records for which @timestamp field is "xxxxxxxxx".
Using the time range and dates
You get the following choices to set the date to narrow down your search results:
Specify days or hours since when you want to search results. For example, search results for last 15 minutes or last 7 days.
Set specific date and time (absolute or specific). For example, search results for Jul 18, 2022 18:00 hours till Jul 19, 2022 18:00 hours.
Using selected and available fields to filter logs
Deriving meaning from the search results
Saving the search
Adding the saved search to a visualization
As an administrator or operator, analyze logs and keep your systems (or environments) healthy:
Narrow down the search results by using a combination of queries, time range, and fields. For example, by searching logs you found that the 401 status code was returned only a few times in a particular time period, say an hour.
The following image shows the options that will help you search logs and narrow down results to the actual issue:
Save the search that you might need in the future. Share the saved searches with other users in your organization.
To save the filter criteria for later use as a saved search, click Save.
|Add visualizations and dashboards
View log data in the form of charts and other graphical representations (tables, region map, heat map, and so on) by creating visualizations and adding them to dashboards. You can monitor log entries through these dashboards. Filter data by using the filtering options, such as query and time range. For example, add a visualization for all 401 status codes where count is more than 5 in one hour to a dashboard.