Format Log Lines with Custom Line Templates
You can use custom line templates to format the lines in the log viewer to make it easier for you to identify specific information that is of interest to you.
- Select an existing View or Create and Edit Views.
- Select Edit View Properties.
- In the Custom %LINE Template area, enter your template.
Display PID, Program, and Log Source
If you have log lines that look similar to the example, you can decide to display the information in a more easily parsed format.
Images of log lines from Viewer.
- Enter
PID: {{pid}} | Program: {{program}} | Log Source: {{logsource}}into Custom %LINE Template area. - You logs should now look like:
Aug 8 11:29:03 samir-Debian-10 daemon.log PID: 468 | Program: logdna-agent | Log Source: ip-12-34-5-67Use Reserved Fields
Reserved fields are marked by an underscore.
If your data resembles:
user 1234 requested endpoint /api/endpointAnd contains this field metadata:
{ meta: { first_name: Jane, last_name: Doe }}Enter {{_meta.first_name}} {{_meta.last_name}}, aka $@ into Custom %LINE Template area. Using $@ will reference the original line.
This will display log messages in that view in this format:
Jane Doe, aka user 1234 requested endpoint /api/endpointReturn as JSON
You can format your data to return as JSON.
{"index": {{query.index}}, "size": {{query.size}}, "ignore_unavailable": {{query.ignore_unavailable}}, "track_total_hits": {{query.track_total_hits}}, "body": {"query": {{query.body.query}}, "sort": {{query.body.sort}}, "aggs":{{query.body.aggs}}}}Formatted Log Line Example
Aug 8 12:49:20 xxxx-xxxx-xxxxxxxxx-xxxx apiinternal info {"index": ["*:logline.*"], "size": 0, "ignore_unavailable": true, "track_total_hits": true, "body": {"query": { "bool": { "must": [ { "range": { "_ts": { "gte": 1659976890001, "lte": 1659977360647 } } }, { "bool": { "should": [ { "term": { "_app": "localhost" } } ] } } ] }}, "sort": { "_lid": { "order": "desc" }}, "aggs":{ "metrics": { "date_histogram": { "field": "_ts", "interval": "30s" } }}}}Was this page helpful?