109 lines
4.2 KiB
Markdown
109 lines
4.2 KiB
Markdown
# Syslog Output Plugin
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The syslog output plugin sends syslog messages transmitted over
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[UDP](https://tools.ietf.org/html/rfc5426) or
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[TCP](https://tools.ietf.org/html/rfc6587) or
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[TLS](https://tools.ietf.org/html/rfc5425), with or without the octet counting framing.
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Syslog messages are formatted according to
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[RFC 5424](https://tools.ietf.org/html/rfc5424).
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### Configuration
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```toml
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[[outputs.syslog]]
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## URL to connect to
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## ex: address = "tcp://127.0.0.1:8094"
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## ex: address = "tcp4://127.0.0.1:8094"
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## ex: address = "tcp6://127.0.0.1:8094"
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## ex: address = "tcp6://[2001:db8::1]:8094"
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## ex: address = "udp://127.0.0.1:8094"
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## ex: address = "udp4://127.0.0.1:8094"
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## ex: address = "udp6://127.0.0.1:8094"
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address = "tcp://127.0.0.1:8094"
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## Optional TLS Config
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# tls_ca = "/etc/telegraf/ca.pem"
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# tls_cert = "/etc/telegraf/cert.pem"
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# tls_key = "/etc/telegraf/key.pem"
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## Use TLS but skip chain & host verification
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# insecure_skip_verify = false
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## Period between keep alive probes.
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## Only applies to TCP sockets.
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## 0 disables keep alive probes.
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## Defaults to the OS configuration.
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# keep_alive_period = "5m"
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## The framing technique with which it is expected that messages are
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## transported (default = "octet-counting"). Whether the messages come
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## using the octect-counting (RFC5425#section-4.3.1, RFC6587#section-3.4.1),
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## or the non-transparent framing technique (RFC6587#section-3.4.2). Must
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## be one of "octet-counting", "non-transparent".
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# framing = "octet-counting"
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## The trailer to be expected in case of non-trasparent framing (default = "LF").
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## Must be one of "LF", or "NUL".
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# trailer = "LF"
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## SD-PARAMs settings
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## Syslog messages can contain key/value pairs within zero or more
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## structured data sections. For each unrecognised metric tag/field a
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## SD-PARAMS is created.
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##
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## Example:
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## [[outputs.syslog]]
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## sdparam_separator = "_"
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## default_sdid = "default@32473"
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## sdids = ["foo@123", "bar@456"]
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##
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## input => xyzzy,x=y foo@123_value=42,bar@456_value2=84,something_else=1
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## output (structured data only) => [foo@123 value=42][bar@456 value2=84][default@32473 something_else=1 x=y]
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## SD-PARAMs separator between the sdid and tag/field key (default = "_")
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# sdparam_separator = "_"
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## Default sdid used for tags/fields that don't contain a prefix defined in
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## the explict sdids setting below If no default is specified, no SD-PARAMs
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## will be used for unrecognised field.
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# default_sdid = "default@32473"
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## List of explicit prefixes to extract from tag/field keys and use as the
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## SDID, if they match (see above example for more details):
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# sdids = ["foo@123", "bar@456"]
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## Default severity value. Severity and Facility are used to calculate the
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## message PRI value (RFC5424#section-6.2.1). Used when no metric field
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## with key "severity_code" is defined. If unset, 5 (notice) is the default
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# default_severity_code = 5
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## Default facility value. Facility and Severity are used to calculate the
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## message PRI value (RFC5424#section-6.2.1). Used when no metric field with
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## key "facility_code" is defined. If unset, 1 (user-level) is the default
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# default_facility_code = 1
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## Default APP-NAME value (RFC5424#section-6.2.5)
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## Used when no metric tag with key "appname" is defined.
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## If unset, "Telegraf" is the default
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# default_appname = "Telegraf"
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```
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### Metric mapping
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The output plugin expects syslog metrics tags and fields to match up with the
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ones created in the [syslog input][].
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The following table shows the metric tags, field and defaults used to format syslog messages.
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| Syslog field | Metric Tag | Metric Field | Default value |
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| --- | --- | --- | --- |
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| APP-NAME | appname | - | default_appname = "Telegraf" |
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| TIMESTAMP | - | timestamp | Metric's own timestamp |
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| VERSION | - | version | 1 |
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| PRI | - | serverity_code + (8 * facility_code)| default_severity_code=5 (notice), default_facility_code=1 (user-level)|
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| HOSTNAME | hostname OR source OR host | - | os.Hostname() |
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| MSGID | - | msgid | Metric name |
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| PROCID | - | procid | - |
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| MSG | - | msg | - |
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[syslog input]: /plugins/inputs/syslog#metrics
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