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tencent-cloud-cls
Apache APISIX
API Gateway
Plugin
CLS
Tencent Cloud
This document contains information about the Apache APISIX tencent-cloud-cls Plugin.

Description

The tencent-cloud-cls Plugin uses TencentCloud CLS API to forward APISIX logs to your topic.

Attributes

Name Type Required Default Valid values Description
cls_host string Yes CLS API host，please refer Uploading Structured Logs.
cls_topic string Yes topic id of CLS.
secret_id string Yes SecretId of your API key.
secret_key string Yes SecretKey of your API key.
sample_ratio number No 1 [0.00001, 1] How often to sample the requests. Setting to 1 will sample all requests.
include_req_body boolean No false [false, true] When set to true includes the request body in the log. If the request body is too big to be kept in the memory, it can't be logged due to NGINX's limitations.
include_req_body_expr array 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 boolean No false [false, true] When set to true includes the response body in the log.
include_resp_body_expr array 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.
global_tag object No kv pairs in JSON，send with each log.
log_format object No 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 $.

NOTE: encrypt_fields = {"secret_key"} 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

{
    "response": {
        "headers": {
            "content-type": "text/plain",
            "connection": "close",
            "server": "APISIX/3.7.0",
            "transfer-encoding": "chunked"
        },
        "size": 136,
        "status": 200
    },
    "route_id": "1",
    "upstream": "127.0.0.1:1982",
    "client_ip": "127.0.0.1",
    "apisix_latency": 100.99985313416,
    "service_id": "",
    "latency": 103.99985313416,
    "start_time": 1704525145772,
    "server": {
        "version": "3.7.0",
        "hostname": "localhost"
    },
    "upstream_latency": 3,
    "request": {
        "headers": {
            "connection": "close",
            "host": "localhost"
        },
        "url": "http://localhost:1984/opentracing",
        "querystring": {},
        "method": "GET",
        "size": 65,
        "uri": "/opentracing"
    }
}

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 tencent-cloud-cls 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/tencent-cloud-cls \
-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 enable the Plugin on a specific Route:

curl http://127.0.0.1:9180/apisix/admin/routes/1 \
-H "X-API-KEY: $admin_key" -X PUT -d '
{
    "plugins": {
        "tencent-cloud-cls": {
            "cls_host": "ap-guangzhou.cls.tencentyun.com",
            "cls_topic": "${your CLS topic name}",
            "global_tag": {
                "module": "cls-logger",
                "server_name": "YourApiGateWay"
            },
            "include_req_body": true,
            "include_resp_body": true,
            "secret_id": "${your secret id}",
            "secret_key": "${your secret key}"
        }
    },
      "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 cls topic:

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

Delete Plugin

To disable this 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
        }
    }
}'