sls-logger.md

title	keywords	description
sls-logger	Apache APISIX API Gateway Plugin SLS Logger Alibaba Cloud Log Service	This document contains information about the Apache APISIX sls-logger Plugin.

Description

The sls-logger Plugin is used to push logs to Alibaba Cloud log Service using RF5424.

It might take some time to receive the log data. It will be automatically sent after the timer function in the batch processor expires.

Attributes

Name	Required	Description
host	True	IP address or the hostname of the TCP server. See Alibaba Cloud log service documentation for details. Use IP address instead of domain.
port	True	Target upstream port. Defaults to 10009.
timeout	False	Timeout for the upstream to send data.
log_format	False	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 $.
project	True	Project name in Alibaba Cloud log service. Create SLS before using this Plugin.
logstore	True	logstore name in Ali Cloud log service. Create SLS before using this Plugin.
access_key_id	True	AccessKey ID in Alibaba Cloud. See Authorization for more details.
access_key_secret	True	AccessKey Secret in Alibaba Cloud. See Authorization for more details.
include_req_body	True	When set to true, includes the request body in the log.
include_req_body_expr	No	Filter for when the include_req_body attribute is set to true. Request body is only logged when the expression set here evaluates to true. See lua-resty-expr for more.
include_resp_body	No	When set to true includes the response body in the log.
include_resp_body_expr	No	Filter for when the include_resp_body attribute is set to true. Response body is only logged when the expression set here evaluates to true. See lua-resty-expr for more.
name	False	Unique identifier for the batch processor. If you use Prometheus to monitor APISIX metrics, the name is exported in apisix_batch_process_entries.

NOTE: encrypt_fields = {"access_key_secret"} is also defined in the schema, which means that the field will be stored encrypted in etcd. See encrypted storage fields.

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.

Example of default log format

{
    "route_conf": {
        "host": "100.100.99.135",
        "buffer_duration": 60,
        "timeout": 30000,
        "include_req_body": false,
        "logstore": "your_logstore",
        "log_format": {
            "vip": "$remote_addr"
        },
        "project": "your_project",
        "inactive_timeout": 5,
        "access_key_id": "your_access_key_id",
        "access_key_secret": "your_access_key_secret",
        "batch_max_size": 1000,
        "max_retry_count": 0,
        "retry_delay": 1,
        "port": 10009,
        "name": "sls-logger"
    },
    "data": "<46>1 2024-01-06T03:29:56.457Z localhost apisix 28063 - [logservice project=\"your_project\" logstore=\"your_logstore\" access-key-id=\"your_access_key_id\" access-key-secret=\"your_access_key_secret\"] {\"vip\":\"127.0.0.1\",\"route_id\":\"1\"}\n"
}

Metadata

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

Name	Type	Required	Default	Description
log_format	object	False		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 $.

:::info IMPORTANT

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

:::

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

:::note You can fetch the admin_key from config.yaml and save to an environment variable with the following command:

admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g')

:::

curl http://127.0.0.1:9180/apisix/admin/plugin_metadata/sls-logger -H "X-API-KEY: $admin_key" -X PUT -d '
{
    "log_format": {
        "host": "$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"}

Enable Plugin

The example below shows how you can configure the Plugin on a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/5 -H "X-API-KEY: $admin_key" -X PUT -d '
{
    "plugins": {
        "sls-logger": {
            "host": "100.100.99.135",
            "port": 10009,
            "project": "your_project",
            "logstore": "your_logstore",
            "access_key_id": "your_access_key_id",
            "access_key_secret": "your_access_key_secret",
            "timeout": 30000
        }
    },
    "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 Ali Cloud log server:

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

Now if you check your Ali Cloud log server, you will be able to see the logs:

Delete Plugin

To remove the sls-logger 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: $admin_key" -X PUT -d '
{
    "uri": "/hello",
    "plugins": {},
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "127.0.0.1:1980": 1
        }
    }
}'