立即与支持人员聊天
与支持团队交流

syslog-ng Open Source Edition 3.36 - 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 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 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 Glossary

Tagging messages

You can label the messages with custom tags. Tags are simple labels, identified by their names, which must be unique. Currently syslog-ng OSE can tag a message at two different places:

When syslog-ng receives a message, it automatically adds the .source.<id_of_the_source_statement> tag to the message. Use the tags() option of the source to add custom tags, and the tags() option of the filters to select only specific messages.

  • Tagging messages and also filtering on the tags is very fast, much faster than other types of filters.

  • Tags are available locally, that is, if you add tags to a message on the client, these tags will not be available on the server.

  • To include the tags in the message, use the ${TAGS} macro in a template. Alternatively, if you are using the IETF-syslog message format, you can include the ${TAGS} macro in the .SDATA.meta part of the message. Note that the ${TAGS} macro is available only in syslog-ng OSE 3.1.1 and later.

For an example on tagging, see Example: Adding tags and filtering messages with tags.

Filter functions

The following functions may be used in the filter statement, as described in Filters.

Table 13: Filter functions available in syslog-ng OSE
Name Description
Filter functions Filter messages based on the sending facility.
Filter functions Call another filter function.
Filter functions Filter messages based on the sending host.
Filter functions File-based whitelisting and blacklisting.
Filter functions Filter messages based on their priority.
Filter functions Use a regular expression to filter messages based on a specified header or content field.
Filter functions Use a regular expression to filter messages based on their content.
Filter functions or Filter functions Filter messages based on the IP address of the sending host.
Filter functions Filter messages based on the sending application.
Filter functions Limits messages rate based on arbitrary keys in each message.
Filter functions Select messages of the specified syslog-ng OSE source statement.
Filter functions Select messages having the specified tag.

facility()

Synopsis: facility(<facility-name>) or facility(<facility-code>) or facility(<facility-name>..<facility-name>)

Description: Match messages having one of the listed facility codes.

The facility() filter accepts both the name and the numerical code of the facility or the importance level. Facility codes 0-23 are predefined and can be referenced by their usual name. Facility codes above 24 are not defined.

You can use the facility filter the following ways:

  • Use a single facility name, for example, facility(user)

  • Use a single facility code, for example, facility(1)

  • Use a facility range (works only with facility names), for example, facility(local0..local5)

The syslog-ng application recognizes the following facilities: (Note that some of these facilities are available only on specific platforms.)

Table 14: syslog Message Facilities recognized by the facility() filter
Numerical Code Facility name Facility
0 kern kernel messages
1 user user-level messages
2 mail mail system
3 daemon system daemons
4 auth security/authorization messages
5 syslog messages generated internally by syslogd
6 lpr line printer subsystem
7 news network news subsystem
8 uucp UUCP subsystem
9 cron clock daemon
10 authpriv security/authorization messages
11 ftp FTP daemon
12 ntp NTP subsystem
13 security log audit
14 console log alert
15 solaris-cron clock daemon
16-23 local0..local7 locally used facilities (local0-local7)

filter()

Synopsis: filter(filtername)

Description: Call another filter rule and evaluate its value. For example:

filter demo_filter { host("example") and match("deny" value("MESSAGE")) };
filter inverted_demo_filter { not filter(demo_filter) }
相关文档

The document was helpful.

选择评级

I easily found the information I needed.

选择评级