Elasticsearch Output Plugin¶
- log routing by log source to multiple Elasticsearch servers
- log routing by log source to multiple Elasticearch indices (or Logsene Apps)
- SSL/TLS by default, when using Logsene
- Two-way SSL Authentication, also known as Mutual Authentication as part of PKI, secure client authentication with SSL client certificates
- bulk indexing with timeout (1000 docs or 10 second timeout by default)
- disk buffer an re-transmit when connection to Elasticsearch fails
- renaming of invalid field names
- limit field size (240k by default)
The following example configuration ships all log files in /var/log (including sub-directories) to one Elasticsearch index.
input: files: - '/var/log/**/*.log' output: my-logsene-app: module: elasticsearch url: https://logsene-receiver.sematext.com index: bb308f80-0453-485e-894c-f80c054a0f10
Log routing to multiple targets¶
In some situations, it is required to ship data from different sources to different Elasticsearch servers or clusters. The output section in the Logagent configuration file accepts multiple definitions for the Elasticsearch output module.
Each Elasticsearch output might have a list of indices followed by a list of regular expressions matching the log source (e.g. file name of the log file).
The following example ships logs from wireless devices and authentication log to a local Elasticsearch server and other server logs to multiple Logsene applications.
input: files: - '/var/log/**/*.log' output: # index logs in Elasticsearch or Logsene local-elasticsearch: module: elasticsearch url: http://localhost:9200 # default index to use, for all logs that don't match any other configuration index: other_logs # specific indices to use per logSource field of parsed logs indices: wireless_logs: # use regex to match log source e.g. /var/log/wifi.log - wifi|bluetooth security_logs: - auth\.log logsene-saas: module: elasticsearch url: https://logsene-receiver.sematext.com indices: bb308f80-0453-485e-894c-f80c054a0f10: - [nginx|httpd]\.log a0ca5032-62da-467d-b6d5-e465a7ce45bb - mysql|postgres|oracle 969020b4-f11c-41dd-86e4-24e67759cdb3 - mongo.*\.log - myapp1\/app.log - myapp2\/app.log
HTTP and HTTPS options¶
The Elasticsearch output module accepts http(s) options. Client side certificates and keys are specified with a file name. If you use self-signed certificates, set rejectUnauthorized to false.
output: secure-elasticsearch: module: elasticsearch url: https://localhost index: logs httpOptions: key: /ssl-keys/client.key cert: /ssl-keys/client.crt rejectUnauthorized: true