Log filtering
Log filtering is the selective retention, routing, or suppression of log records according to attributes such as type, severity, or namespace.
ASP.NET Core in Action, 3e
A logging filter is a configuration rule that selects log messages for output according to criteria such as severity and namespace.
- How it is used
- Reduces noisy output from selected providers or namespaces while keeping logs useful for monitoring and troubleshooting.
- How deep it goes
- Explains severity, category, provider, specificity, and layered configuration, but stops short of provider implementation internals.
- Examples
- Uses ILogger messages, Microsoft namespace filters, console and file providers, appsettings.json, and AddConfiguration().
- What you can do after
- Configure ASP.NET Core logging with category- and provider-specific minimum levels through appsettings.json or AddConfiguration().
Read how ASP.NET Core in Action, 3e explains log filtering →
Learn Docker in a Month of Lunches, Second Edition
Log filtering is the selective retention, routing, or suppression of log records according to their attributes or severity.
- How it is used
- Balances diagnostic detail against storage costs by filtering container logs before Elasticsearch storage.
- How deep it goes
- Explains tag-based Fluentd routing, enrichment, and configuration updates, but stops short of broader filtering strategies.
- Examples
- Demonstrates filtering gallery.access-log records to stdout while retaining other gallery logs in Elasticsearch.
- What you can do after
- Operate/configure Fluentd to route verbose container logs without changing application containers.
Read how Learn Docker in a Month of Lunches, Second Edition explains log filtering →
Related concepts
- fluentdused by · Fluentd is an open-source data collector that gathers, processes, transforms, and routes logs and other machine-generated event data through pluggable integrations.
- logging leveluses · A logging level is a severity or verbosity classification or setting that determines which log messages a logging system processes, emits, or retains.
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