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syslog-ng Open Source Edition 3.38 - Administration Guide

Preface Introduction to syslog-ng The concepts of syslog-ng Installing syslog-ng The syslog-ng OSE quick-start guide The syslog-ng OSE configuration file source: Read, receive, and collect log messages
How sources work default-network-drivers: Receive and parse common syslog messages internal: Collecting internal messages file: Collecting messages from text files wildcard-file: Collecting messages from multiple text files kubernetes: Collecting and parsing the Kubernetes CRI (Container Runtime Interface) format linux-audit: Collecting messages from Linux audit logs mqtt: receiving messages from an MQTT broker network: Collecting messages using the RFC3164 protocol (network() driver) nodejs: Receiving JSON messages from nodejs applications mbox: Converting local email messages to log messages osquery: Collect and parse osquery result logs pipe: Collecting messages from named pipes pacct: Collecting process accounting logs on Linux program: Receiving messages from external applications python: writing server-style Python sources python-fetcher: writing fetcher-style Python sources snmptrap: Read Net-SNMP traps sun-streams: Collecting messages on Sun Solaris syslog: Collecting messages using the IETF syslog protocol (syslog() driver) system: Collecting the system-specific log messages of a platform systemd-journal: Collecting messages from the systemd-journal system log storage systemd-syslog: Collecting systemd messages using a socket tcp, tcp6, udp, udp6: Collecting messages from remote hosts using the BSD syslog protocol— OBSOLETE unix-stream, unix-dgram: Collecting messages from UNIX domain sockets stdin: Collecting messages from the standard input stream
destination: Forward, send, and store log messages
amqp: Publishing messages using AMQP collectd: sending metrics to collectd discord: Sending alerts and notifications to Discord elasticsearch2: Sending messages directly to Elasticsearch version 2.0 or higher (DEPRECATED) elasticsearch-http: Sending messages to Elasticsearch HTTP Bulk API file: Storing messages in plain-text files graphite: Sending metrics to Graphite Sending logs to Graylog hdfs: Storing messages on the Hadoop Distributed File System (HDFS) Posting messages over HTTP http: Posting messages over HTTP without Java kafka: Publishing messages to Apache Kafka (Java implementation) kafka-c(): Publishing messages to Apache Kafka using the librdkafka client (C implementation) loggly: Using Loggly logmatic: Using Logmatic.io mongodb(): Storing messages in a MongoDB database mqtt() destination: sending messages from a local network to an MQTT broker network: Sending messages to a remote log server using the RFC3164 protocol (network() driver) osquery: Sending log messages to osquery's syslog table pipe: Sending messages to named pipes program: Sending messages to external applications pseudofile() python: writing custom Python destinations redis: Storing name-value pairs in Redis riemann: Monitoring your data with Riemann slack: Sending alerts and notifications to a Slack channel smtp: Generating SMTP messages (email) from logs snmp: Sending SNMP traps Splunk: Sending log messages to Splunk sql: Storing messages in an SQL database stomp: Publishing messages using STOMP Sumo Logic destinations: sumologic-http() and sumologic-syslog() syslog: Sending messages to a remote logserver using the IETF-syslog protocol syslog-ng(): Forward logs to another syslog-ng node tcp, tcp6, udp, udp6: Sending messages to a remote log server using the legacy BSD-syslog protocol (tcp(), udp() drivers) Telegram: Sending messages to Telegram unix-stream, unix-dgram: Sending messages to UNIX domain sockets usertty: Sending messages to a user terminal: usertty() destination Write your own custom destination in Java or Python Client-side failover
log: Filter and route log messages using log paths, flags, and filters Global options of syslog-ng OSE TLS-encrypted message transfer template and rewrite: Format, modify, and manipulate log messages parser: Parse and segment structured messages
Parsing syslog messages Parsing messages with comma-separated and similar values Parsing key=value pairs JSON parser XML parser Parsing dates and timestamps Python parser Parsing tags Apache access log parser Linux audit parser Cisco parser Parsing enterprise-wide message model (EWMM) messages iptables parser Netskope parser panos-parser(): parsing PAN-OS log messages Sudo parser MariaDB parser Websense parser Fortigate parser Check Point Log Exporter parser Regular expression (regexp) parser db-parser: Process message content with a pattern database (patterndb)
Correlating log messages Enriching log messages with external data Statistics of syslog-ng Multithreading and scaling in syslog-ng OSE Troubleshooting syslog-ng Best practices and examples The syslog-ng manual pages Creative Commons Attribution Non-commercial No Derivatives (by-nc-nd) License The syslog-ng Open Source Edition Documentation License Glossary

Sumo Logic destinations: sumologic-http() and sumologic-syslog()

From version 3.27.1, the syslog-ng Open Source Edition (syslog-ng OSE) application can send log messages to Sumo Logic, a cloud-based log management and security analytics service, by using the sumologic-http() and sumologic-syslog() destinations.

Prerequisites

Currently, using the sumologic-http() and sumologic-syslog() destinations with syslog-ng OSE has the following prerequisites:

  • A Sumo Logic account.

    If you do not yet have a Sumo Logic account, visit the official Sumo Logic website, and click Start free trial to create an account.

    NOTE: A free trial version of the Sumo Logic account has limited functionalities and is only available for 90 days.

  • A Cloud Syslog Source configured with your Sumo Logic account.

    For details, follow the configuration instructions under the Configure a Cloud Syslog Source section on the official Sumo Logic website.

    NOTE: Transport-level security (TLS) 1.2 over TCP is required.

  • A Cloud Syslog Source Token (from the Cloud Syslog Source side).

  • TLS set up on your Sumo Logic account.

    For detailed information about setting up TLS in your Sumo Logic account, see the description for setting up TLS on the Sumo Logic official website.

    NOTE: After you download the DigiCert certificate, make sure you follow the certificate setup steps under the syslog-ng section.

  • Your Sumo Logic syslog client, configured to send data to the Sumo Logic cloud syslog service, by using syslog-ng OSE.

    For detailed information, follow the instructions under the Send data to cloud syslog source with syslog-ng section on the official Sumo Logic website.

  • A verified connection and client configuration with the Sumo Logic service.

    		 Caution:

    To avoid potential data loss, One Identity strongly recommends that you verify your connection and client configuration with the Sumo Logic service before you start using the sumologic-http() or sumologic-syslog() destination with syslog-ng OSE in a production environment.

  • (Optional) For using the sumologic-http() destination, you need a HTTP Hosted Collector configured in the Sumo Logic service.

    To configure a Hosted Collector, follow the configuration instructions under the Configure a Hosted Collector section on the official Sumo Logic website.

  • (Optional) For using the sumologic-http() destination, you need the unique HTTP collector code you receive while configuring your Host Collector for HTTP requests.

Limitations

Currently, using the sumologic-syslog() and sumologic-http() destinations with syslog-ng OSE has the following limitations:

  • The minimum required version of syslog-ng OSE is version 3.27.1.

  • Message format must be in RFC 5424-compliant form. Messages over 64KB in length are truncated.

    For more information about the message format limitations, see the Message format section on the official Sumo Logic website.

  • 64 characters long Sumo Logic tokens must be passed in the message body.

    NOTE: Although RFC 5424 limits the structured data field (SD-ID) to 32 characters, Sumo Logic tokens are 64 characters long. If your logging client enforces the 32 characters length limit, you must pass the token in the message body.

Declaration for the sumologic-http() destination
destination d_sumo_http {
  sumologic-http(
    collector("ZaVnC4dhaV3_[...]UF2D8DRSnHiGKoq9Onvz-XT7RJG2FA6RuyE5z4A==")
    deployment("eu")
    tls(peer-verify(yes) ca-dir('/etc/syslog-ng/ca.d'))
  );
};
Declaration for the sumologic-syslog() destination
destination d_sumo_syslog {
  sumologic-syslog(
    token("rqf/bdxYVaBLFMoU39[...]CCC5jwETm@41123")
    deployment("eu")
    tls(peer-verify(yes) ca-dir('/etc/syslog-ng/ca.d'))
  );
};
Using the sumologic() driver

To use the sumologic() driver, the scl.conf file must be included in your syslog-ng OSE configuration:

@include "scl.conf"

NOTE: The sumologic() driver is actually a reusable configuration snippet configured to send log messages using the network() and http() destination by using a template. For details on using or writing such configuration snippets, see Reusing configuration blocks. You can find the source of this configuration snippet on GitHub.

sumologic-http()

The sumologic-http() and sumologic-syslog() destinations send log messages to Sumo Logic, a cloud-based log management and security analytics service.

Using the sumologic-http() destination, you can send data to the Sumo Logic service by utilizing a Hosted Collector hosted by Sumo Logic.

For more information about the sumologic-http() destination, see sumologic-syslog() .

Sending data using the sumologic-http() destination
Example: Using the sumologic-http() destination

The following example sends every log from the system() source to your Sumo Logic account.

log {
  source { system(); };

  destination {
    sumologic-http(
      collector("UNIQUE-HTTP-COLLECTOR-CODE-AS-PROVIDED-BY-sumologic")
      deployment("ENDPOINT")
      tls(peer-verify(yes) ca-dir('/etc/syslog-ng/ca.d'))
    );
  };
};

sumologic-syslog()

The sumologic-http() and sumologic-syslog() destinations send log messages to Sumo Logic, a cloud-based log management and security analytics service.

Using the sumologic-syslog() destination, you can send data (both in JSON and in non-JSON format) to the Sumo Logic service.

For more information about the sumologic-http() destination, see sumologic-http() .

Sending data using the sumologic-syslog() destination
Example: Sending data using the sumologic-syslog() destination

The following example illustrates how you can use the sumologic-syslog() destination to send data to your Sumo Logic account.

log {
  source { system(); };

  destination{
    sumologic-syslog(token("USER-TOKEN-AS-PROVIDED-BY-sumologic")
      deployment("ENDPOINT")
      tls(peer-verify(required-trusted) ca-dir('/etc/syslog-ng/ca.d'))
    );
};
};
Sending JSON data using the sumologic-syslog destination
Example: Sending data using the sumologic-syslog() destination

The following example illustrates how you can use the sumologic-syslog() destination to send JSON data to your Sumo Logic account.

log {
  source{ system(); };

  destination{
    sumologic-syslog(token("USER-TOKEN-AS-PROVIDED-BY-sumologic")
      deployment("ENDPOINT")
      tls(peer-verify(required-trusted) ca-dir('/etc/syslog-ng/ca.d'))
      template("$(format-json --scope all-nv-pairs)")
    );
  };
};

sumologic-http() and sumologic-syslog() destination options

The sumologic-http() and sumologic-syslog() destinations have the following options.

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