- Filebeat Reference: other versions:
- Filebeat overview
- Quick start: installation and configuration
- Set up and run
- Upgrade
- How Filebeat works
- Configure
- Inputs
- Modules
- General settings
- Project paths
- Config file loading
- Output
- Kerberos
- SSL
- Index lifecycle management (ILM)
- Elasticsearch index template
- Kibana endpoint
- Kibana dashboards
- Processors
- Define processors
- add_cloud_metadata
- add_cloudfoundry_metadata
- add_docker_metadata
- add_fields
- add_host_metadata
- add_id
- add_kubernetes_metadata
- add_labels
- add_locale
- add_network_direction
- add_observer_metadata
- add_process_metadata
- add_tags
- community_id
- convert
- copy_fields
- decode_base64_field
- decode_cef
- decode_csv_fields
- decode_json_fields
- decompress_gzip_field
- detect_mime_type
- dissect
- dns
- drop_event
- drop_fields
- extract_array
- fingerprint
- include_fields
- rate_limit
- registered_domain
- rename
- script
- timestamp
- translate_sid
- truncate_fields
- urldecode
- Autodiscover
- Internal queue
- Load balancing
- Logging
- HTTP endpoint
- Regular expression support
- Instrumentation
- filebeat.reference.yml
- How to guides
- Override configuration settings
- Load the Elasticsearch index template
- Change the index name
- Load Kibana dashboards
- Load ingest pipelines
- Enrich events with geoIP information
- Deduplicate data
- Parse data by using ingest node
- Use environment variables in the configuration
- Avoid YAML formatting problems
- Beats central management
- Modules
- Modules overview
- ActiveMQ module
- Apache module
- Auditd module
- AWS module
- Azure module
- Barracuda module
- Bluecoat module
- CEF module
- Check Point module
- Cisco module
- CoreDNS module
- Crowdstrike module
- Cyberark module
- Cylance module
- Elasticsearch module
- Envoyproxy Module
- F5 module
- Fortinet module
- Google Cloud module
- Google Workspace module
- GSuite module
- haproxy module
- IBM MQ module
- Icinga module
- IIS module
- Imperva module
- Infoblox module
- Iptables module
- Juniper module
- Kafka module
- Kibana module
- Logstash module
- Microsoft module
- MISP module
- MongoDB module
- MSSQL module
- MySQL module
- MySQL Enterprise module
- nats module
- NetFlow module
- Netscout module
- Nginx module
- Office 365 module
- Okta module
- Oracle module
- Osquery module
- Palo Alto Networks module
- PostgreSQL module
- Proofpoint module
- RabbitMQ module
- Radware module
- Redis module
- Santa module
- Snort module
- Snyk module
- Sonicwall module
- Sophos module
- Squid module
- Suricata module
- System module
- Tomcat module
- Traefik module
- Zeek (Bro) Module
- Zoom module
- Zscaler module
- Exported fields
- ActiveMQ fields
- Apache fields
- Auditd fields
- AWS fields
- aws-cloudwatch fields
- Azure fields
- Barracuda Web Application Firewall fields
- Beat fields
- Blue Coat Director fields
- Decode CEF processor fields fields
- CEF fields
- Checkpoint fields
- Cisco fields
- Cloud provider metadata fields
- Coredns fields
- Crowdstrike fields
- Cyber-Ark fields
- CylanceProtect fields
- Docker fields
- ECS fields
- Elasticsearch fields
- Envoyproxy fields
- Big-IP Access Policy Manager fields
- Fortinet fields
- Google Cloud Platform (GCP) fields
- google_workspace fields
- gsuite fields
- HAProxy fields
- Host fields
- ibmmq fields
- Icinga fields
- IIS fields
- Imperva SecureSphere fields
- Infoblox NIOS fields
- iptables fields
- Jolokia Discovery autodiscover provider fields
- Juniper JUNOS fields
- Kafka fields
- kibana fields
- Kubernetes fields
- Log file content fields
- logstash fields
- Microsoft fields
- MISP fields
- mongodb fields
- mssql fields
- MySQL fields
- MySQL Enterprise fields
- NATS fields
- NetFlow fields
- Arbor Peakflow SP fields
- Nginx fields
- Office 365 fields
- Okta fields
- Oracle fields
- Osquery fields
- panw fields
- PostgreSQL fields
- Process fields
- Proofpoint Email Security fields
- RabbitMQ fields
- Radware DefensePro fields
- Redis fields
- s3 fields
- Google Santa fields
- Snort/Sourcefire fields
- Snyk fields
- Sonicwall-FW fields
- sophos fields
- Squid fields
- Suricata fields
- System fields
- Apache Tomcat fields
- Traefik fields
- Zeek fields
- Zoom fields
- Zscaler NSS fields
- Monitor
- Secure
- Troubleshoot
- Get help
- Debug
- Common problems
- Can’t read log files from network volumes
- Filebeat isn’t collecting lines from a file
- Too many open file handlers
- Registry file is too large
- Inode reuse causes Filebeat to skip lines
- Log rotation results in lost or duplicate events
- Open file handlers cause issues with Windows file rotation
- Filebeat is using too much CPU
- Dashboard in Kibana is breaking up data fields incorrectly
- Fields are not indexed or usable in Kibana visualizations
- Filebeat isn’t shipping the last line of a file
- Filebeat keeps open file handlers of deleted files for a long time
- Filebeat uses too much bandwidth
- Error loading config file
- Found unexpected or unknown characters
- Logstash connection doesn’t work
- Publishing to Logstash fails with "connection reset by peer" message
- @metadata is missing in Logstash
- Not sure whether to use Logstash or Beats
- SSL client fails to connect to Logstash
- Monitoring UI shows fewer Beats than expected
- Dashboard could not locate the index-pattern
- Contribute to Beats
Use environment variables in the configuration
editUse environment variables in the configuration
editYou can use environment variable references in the config file to set values that need to be configurable during deployment. To do this, use:
${VAR}
Where VAR
is the name of the environment variable.
Each variable reference is replaced at startup by the value of the environment variable. The replacement is case-sensitive and occurs before the YAML file is parsed. References to undefined variables are replaced by empty strings unless you specify a default value or custom error text.
To specify a default value, use:
${VAR:default_value}
Where default_value
is the value to use if the environment variable is
undefined.
To specify custom error text, use:
${VAR:?error_text}
Where error_text
is custom text that will be prepended to the error
message if the environment variable cannot be expanded.
If you need to use a literal ${
in your configuration file then you can write
$${
to escape the expansion.
After changing the value of an environment variable, you need to restart Filebeat to pick up the new value.
You can also specify environment variables when you override a config
setting from the command line by using the -E
option. For example:
-E name=${NAME}
Examples
editHere are some examples of configurations that use environment variables and what each configuration looks like after replacement:
Config source | Environment setting | Config after replacement |
---|---|---|
|
|
|
|
no setting |
|
|
no setting |
|
|
|
|
|
no setting |
None. Returns an error message that’s prepended with the custom text. |
|
|
|
Specify complex objects in environment variables
editYou can specify complex objects, such as lists or dictionaries, in environment variables by using a JSON-like syntax.
As with JSON, dictionaries and lists are constructed using {}
and []
. But
unlike JSON, the syntax allows for trailing commas and slightly different string
quotation rules. Strings can be unquoted, single-quoted, or double-quoted, as a
convenience for simple settings and to make it easier for you to mix quotation
usage in the shell. Arrays at the top-level do not require brackets ([]
).
For example, the following environment variable is set to a list:
ES_HOSTS="10.45.3.2:9220,10.45.3.1:9230"
You can reference this variable in the config file:
output.elasticsearch: hosts: '${ES_HOSTS}'
When Filebeat loads the config file, it resolves the environment variable and
replaces it with the specified list before reading the hosts
setting.
Do not use double-quotes ("
) to wrap regular expressions, or the backslash (\
) will be interpreted as an escape character.