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Version: 3.1

syslog

Description#

The syslog Plugin is used to push logs to a Syslog server.

Logs can be set as JSON objects.

Attributes#

NameTypeRequiredDefaultValid valuesDescription
hoststringTrueIP address or the hostname of the Syslog server.
portintegerTrueTarget port of the Syslog server.
namestringFalse"sys logger"Identifier for the server.
timeoutintegerFalse3000[1, ...]Timeout in ms for the upstream to send data.
tlsbooleanFalsefalseWhen set to true performs TLS verification.
flush_limitintegerFalse4096[1, ...]Maximum size of the buffer (KB) and the current message before it is flushed and written to the server.
drop_limitintegerFalse1048576Maximum size of the buffer (KB) and the current message before the current message is dropped because of the size limit.
sock_typestringFalse"tcp"["tcp", "udp]Transport layer protocol to use.
pool_sizeintegerFalse5[5, ...]Keep-alive pool size used by sock:keepalive.
include_req_bodybooleanFalsefalseWhen set to true includes the request body in the log.

This Plugin supports using batch processors to aggregate and process entries (logs/data) in a batch. This avoids the need for frequently submitting the data. The batch processor submits data every 5 seconds or when the data in the queue reaches 1000. See Batch Processor for more information or setting your custom configuration.

Metadata#

You can also set the format of the logs by configuring the Plugin metadata. The following configurations are available:

NameTypeRequiredDefaultDescription
log_formatobjectFalse{"host": "$host", "@timestamp": "$time_iso8601", "client_ip": "$remote_addr"}Log format declared as key value pairs in JSON format. Values only support strings. APISIX or Nginx variables can be used by prefixing the string with $.
IMPORTANT

Configuring the Plugin metadata is global in scope. This means that it will take effect on all Routes and Services which use the syslog Plugin.

The example below shows how you can configure through the Admin API:

curl http://127.0.0.1:9180/apisix/admin/plugin_metadata/syslog -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"log_format": {
"host": "$host",
"@timestamp": "$time_iso8601",
"client_ip": "$remote_addr"
}
}'

With this configuration, your logs would be formatted as shown below:

{"host":"localhost","@timestamp":"2020-09-23T19:05:05-04:00","client_ip":"127.0.0.1","route_id":"1"}
{"host":"localhost","@timestamp":"2020-09-23T19:05:05-04:00","client_ip":"127.0.0.1","route_id":"1"}

Enabling the Plugin#

The example below shows how you can enable the Plugin for a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"syslog": {
"host" : "127.0.0.1",
"port" : 5044,
"flush_limit" : 1
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:1980": 1
}
},
"uri": "/hello"
}'

Example usage#

Now, if you make a request to APISIX, it will be logged in your Syslog server:

curl -i http://127.0.0.1:9080/hello

Disable Plugin#

To disable the syslog Plugin, you can delete the corresponding JSON configuration from the Plugin configuration. APISIX will automatically reload and you do not have to restart for this to take effect.

curl http://127.0.0.1:9180/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"methods": ["GET"],
"uri": "/hello",
"plugins": {},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:1980": 1
}
}
}'