`sys` is a plugin which push Log data requests to Syslog.
This will provide the ability to send Log data requests as JSON objects.
## Attributes
|Name |Requirement |Description|
|--------- |-------- |-----------|
|host |required | IP address or the Hostname.|
|port |required | Target upstream port.|
|timeout |optional |Timeout for the upstream to send data.|
|tls |optional |Boolean value to control whether to perform SSL verification|
|flush_limit |optional |If the buffered messages' size plus the current message size reaches (>=) this limit (in bytes), the buffered log messages will be written to log server. Default to 4096 (4KB).|
|drop_limit |optional |If the buffered messages' size plus the current message size is larger than this limit (in bytes), the current log message will be dropped because of limited buffer size. Default drop_limit is 1048576 (1MB).|
|sock_type|optional |IP protocol type to use for transport layer. Can be either "tcp" or "udp". Default is "tcp".|
|max_retry_times|optional |Max number of retry times after a connect to a log server failed or send log messages to a log server failed.|
|retry_interval|optional |The time delay (in ms) before retry to connect to a log server or retry to send log messages to a log server, default to 100 (0.1s).|
|pool_size |optional |Keepalive pool size used by sock:keepalive. Default to 10.|
## How To Enable
The following is an example on how to enable the sys-logger for a specific route.
```shell
curl http://127.0.0.1:9080/apisix/admin/consumers -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"username": "foo",
"plugins": {
"plugins": {
"syslog": {
"host" : "127.0.0.1",
"port" : 5044,
"flush_limit" : 1
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:1980": 1
}
},
"uri": "/hello"
}
}'
```
## Test Plugin
* success:
```shell
$ curl -i http://127.0.0.1:9080/hello
HTTP/1.1 200 OK
...
hello, world
```
## Disable Plugin
Remove the corresponding json configuration in the plugin configuration to disable the `sys-logger`.
APISIX plugins are hot-reloaded, therefore no need to restart APISIX.
