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Access Logs

Updated on 2024-12-02 GMT+08:00

Context

You can check access logs in either of the following ways:

  • Enable and check access logs via an independent API. Configure the API parameters to record the access log time and size. The access log content is returned through a REST API.
  • Print access logs. Your access logs are printed as files in backend logs.

Enabling the access log function may affect cluster performance.

The following table describes access log parameters.

Table 1 Access log parameters

Parameter

Type

Description

duration_limit

String

Duration recorded in an access log.

Value range: 10 to 120

Unit: s

Default value: 30

capacity_limit

String

Size of an access log. After access logging is enabled, the size of recorded requests is checked. If the size exceeds the value of this parameter, the access logging stops.

Value range: 1 to 5

Unit: MB

Default value: 1

NOTE:

Access logging stops if either duration_limit or capacity_limit reaches the threshold.

Procedure

  1. Log in to the CSS management console.
  2. Choose Clusters in the navigation pane. On the Clusters page, locate the target cluster and click Access Kibana in the Operation column.
  3. In the navigation pane on the left, choose Dev Tools and run commands to enable or disable access logs.
    • Enabling access logs for all nodes in a cluster
      PUT /_access_log?duration_limit=30s&capacity_limit=1mb
    • Enabling access logs for a node in a cluster
      PUT /_access_log/{nodeId}?duration_limit=30s&capacity_limit=1mb

      {nodeId} indicates the ID of the node where you want to enable access logs.

  4. Use APIs to check access logs.
    • API for checking the access logs of all nodes in a cluster
      GET /_access_log
    • API for checking the access logs of a node in a cluster
      GET /_access_log/{nodeId}

      {nodeId} indicates the ID of the node where you want to enable access logs.

    Example response:
    {
      "_nodes" : {
        "total" : 1,
        "successful" : 1,
        "failed" : 0
      },
      "cluster_name" : "css-flowcontroller",
      "nodes" : {
        "8x-ZHu-wTemBQwpcGivFKg" : {
          "name" : "css-flowcontroller-ess-esn-1-1",
          "host" : "10.0.0.98",
          "count" : 2,
          "access" : [
            {
              "time" : "2021-02-23 02:09:50",
              "remote_address" : "/10.0.0.98:28191",
              "url" : "/_access/security/log?pretty",
              "method" : "GET",
              "content" : ""
            },
            {
              "time" : "2021-02-23 02:09:52",
              "remote_address" : "/10.0.0.98:28193",
              "url" : "/_access/security/log?pretty",
              "method" : "GET",
              "content" : ""
            }
          ]
        }
      }
    }
    Table 2 Response parameters

    Parameter

    Description

    name

    Node name

    host

    Node IP address

    count

    Number of node access requests in a statistical period

    access

    Details about node access requests in a statistical period For details, see Table 3.

    Table 3 access

    Parameter

    Description

    time

    Request time

    remote_address

    Source IP address and port number of the request

    url

    Original URL of the request

    method

    Method corresponding to the request path

    content

    Request content

  5. Enable or disable the access log function.

    All user access operation can be logged. By default, logs are recorded in the acces_log.log file in the background. The maximum size of a log file is 250 MB, and there can be a maximum of five log files. You can back up access log files to OBS.

    • Enabling access logs
      PUT /_cluster/settings
      {
        "persistent": {
          "flowcontrol.accesslog.enabled": true  
         }
      }
    • Disabling access logs
      PUT /_cluster/settings
      {
        "persistent": {
          "flowcontrol.accesslog.enabled": false
         }
      }

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