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Querying Logs

Updated on 2023-11-29 GMT+08:00

Function

This API is used to query logs in a specified log stream.

URI

POST /v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query

Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

ID. For details about how to obtain the ID, see Obtaining the AccountID, Project ID, Log Group ID, and Log Stream ID.

Default value: None

Value length: 32 characters

log_group_id

Yes

String

Log group ID

Default value: None

Value length: 36 characters

log_stream_id

Yes

String

Log stream ID

Default value: None

Value length: 36 characters

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token obtained from IAM.

Default value: None

Minimum length: 1000 characters

Maximum length: 2000 characters

Content-Type

Yes

String

Set this parameter to application/json;charset=UTF-8.

Default value: None

Minimum length: 30 characters

Maximum length: 30 characters

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

start_time

Yes

String

UTC start time of the search window (in milliseconds).
NOTE:

Maximum query time range: 30 days

end_time

Yes

String

UTC end time of the search window (in milliseconds).

NOTE:

Maximum query time range: 30 days

labels

No

Map<String,String>

Filter criteria, which vary between log sources.

keywords

No

String

Keyword used for search. A keyword is a word between two adjacent delimiters.

Enumerated value:

  • error

line_num

No

String

Sequence number of a log event. This parameter is not required for the first query, but is required for subsequent pagination queries. The value can be obtained from the response of the last query. The value of line_num should be between the values of start_time and end_time.

Value length: 19 characters

is_desc

No

Boolean

Whether the search order is descending or ascending. The default value is false, indicating that search results are displayed in ascending order.

Enumerated value:

  • false

search_type

No

String

The value is init (default value) for the first query, or forwards or backwards for a pagination query. This parameter is used together with is_desc for pagination queries.

Enumerated value:

  • forwards

limit

No

Integer

Number of logs to be queried each time. The value is 50 when this parameter is not set. You are advised to set this parameter to 100.

Minimum value: 1

Maximum value: 5000

Response Parameters

Status code: 200

Table 4 Response body parameter

Parameter

Type

Description

logs

Array of LogContents objects

Information of logs.

count

Integer

Number of logs.

Table 5 LogContents

Parameter

Type

Description

content

String

Raw log data.

Minimum length: 1 character

Maximum length: 10,000 characters

line_num

String

Sequence number of a log event.

Value length: 19 characters

labels

Map<String,String>

Labels contained in a log event. The labels vary depending on log events.

Status code: 400

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

Enumerated value:

  • LTS.0403

error_msg

String

Error message.

Enumerated value:

  • Invalid projectId

Status code: 401

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

Enumerated value:

  • LTS.0403

error_msg

String

Error message.

Enumerated value:

  • Invalid projectId

Status code: 403

Table 8 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

Enumerated value:

  • LTS.0403

error_msg

String

Error message.

Enumerated value:

  • Invalid projectId

Status code: 500

Table 9 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

Enumerated value:

  • LTS.0403

error_msg

String

Error message.

Enumerated value:

  • Invalid projectId

Example Request

Log details:

2020-07-25/14:44:42 this log is Error NO 1
2020-07-25/14:44:43 this log is Error NO 2
2020-07-25/14:44:44 this log is Error NO 3
2020-07-25/14:44:45 this log is Error NO 4
2020-07-25/14:44:46 this log is Error NO 5
2020-07-25/14:44:47 this log is Error NO 6
2020-07-25/14:44:48 this log is Error NO 7
2020-07-25/14:44:49 this log is Error NO 8
2020-07-25/14:44:50 this log is Error NO 9
2020-07-25/14:44:51 this log is Error NO 10
POST https://{endpoint}/v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query 
  • For the first query:
    v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query 
    { 
      "start_time": 1595659200000, 
      "end_time": 1595659500000,
      "labels":  
          { 
            "hostName": "ecs-kwxtest" 
          }, 
      "keywords": "log",
      "limit": 10,
      "is_count":true
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 6, NO 7, and NO 8 are the target log events):
    v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query
    { 
      "start_time": 1595659200000, 
      "end_time": 1595659500000,
      "labels":  
          { 
            "hostName": "ecs-kwxtest" 
          }, 
      "keywords": "log",
      "line_num": "1595659490239433658",
      "is_desc": "false",
      "search_type": "forwards",
      "limit": "3",
      "is_count":true
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 8, NO 7, and NO 6 are the target log events):
    { 
      "start_time": 1595659200000, 
      "end_time": 1595659500000,
      "labels":  
          { 
            "hostName": "ecs-kwxtest" 
          }, 
      "keywords": "log",
      "line_num": "1595659490239433658",
      "is_desc": "true",
      "search_type": "backwards",
      "limit": "3",
      "is_count":true
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 2, NO 3, and NO 4 are the target log events):
    v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query
    { 
      "start_time": 1595659200000, 
      "end_time": 1595659500000,
      "labels":  
          { 
            "hostName": "ecs-kwxtest" 
          }, 
      "keywords": "log",
      "line_num": "1595659490239433658",
      "is_desc": "false",
      "search_type": "backwards",
      "limit": "3",
      "is_count":true
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 4, NO 3, and NO 2 are the target log events):
    v2/{project_id}/groups/{log_group_id}/streams/{log_stream_id}/content/query
    { 
      "start_time": 1595659200000, 
      "end_time": 1595659500000,
      "labels":  
          { 
            "hostName": "ecs-kwxtest" 
          }, 
      "keywords": "log",
      "line_num": "1595659490239433658",
      "is_desc": "true",
      "search_type": "forwards",
      "limit": "3",
      "is_count":true
    }

Example Response

  • For the first query:
    { 
      "count": 32,
      "logs": [
            {
                "content": "2020-07-25/14:44:42 this <HighLightTag>log</HighLightTag> is Error NO 1\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433654"
            },
            {
                "content": "2020-07-25/14:44:43 this <HighLightTag>log</HighLightTag> is Error NO 2\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433655"
            },
            {
                "content": "2020-07-25/14:44:44 this <HighLightTag>log</HighLightTag> is Error NO 3\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433656"
            },
            {
                "content": "2020-07-25/14:44:45 this <HighLightTag>log</HighLightTag> is Error NO 4\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433657"
            },
            {
                "content": "2020-07-25/14:44:46 this <HighLightTag>log</HighLightTag> is Error NO 5\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433658"
            },
            {
                "content": "2020-07-25/14:44:47 this <HighLightTag>log</HighLightTag> is Error NO 6\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433659"
            },
            {
                "content": "2020-07-25/14:44:48 this <HighLightTag>log</HighLightTag> is Error NO 7\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433660"
            },
            {
                "content": "2020-07-25/14:44:49 this <HighLightTag>log</HighLightTag> is Error NO 8\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433661"
            },
            {
                "content": "2020-07-25/14:44:50 this <HighLightTag>log</HighLightTag> is Error NO 9\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490839420574"
            },
            {
                "content": "2020-07-25/14:44:51 this <HighLightTag>log</HighLightTag> is Error NO 10\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659491839412667"
            }
    ]
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 6, NO 7, and NO 8 are the target log events):
    {
        "count": 32,
      
        "logs": [
            {
                "content": "2020-07-25/14:44:47 this <HighLightTag>log</HighLightTag> is Error NO 6\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433659"
            },
            {
                "content": "2020-07-25/14:44:48 this <HighLightTag>log</HighLightTag> is Error NO 7\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433660"
            },
            {
                "content": "2020-07-25/14:44:49 this <HighLightTag>log</HighLightTag> is Error NO 8\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433661"
            }
        ]
    }     
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 8, NO 7, and NO 6 are the target log events):
    {
        "count": 32,
       
        "logs": [
            {
                "content": "2020-07-25/14:44:49 this <HighLightTag>log</HighLightTag> is Error NO 8\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433661"
            },
            {
                "content": "2020-07-25/14:44:48 this <HighLightTag>log</HighLightTag> is Error NO 7\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433660"
            },
            {
                "content": "2020-07-25/14:44:47 this <HighLightTag>log</HighLightTag> is Error NO 6\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433659"
            }
        ]
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 2, NO 3, and NO 4 are the target log events):
    {
        "count": 32,
       
        "logs": [
            {
                "content": "2020-07-25/14:44:43 this <HighLightTag>log</HighLightTag> is Error NO 2\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433655"
            },
            {
                "content": "2020-07-25/14:44:44 this <HighLightTag>log</HighLightTag> is Error NO 3\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433656"
            },
            {
                "content": "2020-07-25/14:44:45 this <HighLightTag>log</HighLightTag> is Error NO 4\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433657"
            }
        ]
    }
  • For a pagination query (Assume that the search starts from the log event containing NO 5 and the log events containing NO 4, NO 3, and NO 2 are the target log events):
    {
        "count": 32,
        "logs": [
            {
                "content": "2020-07-25/14:44:45 this <HighLightTag>log</HighLightTag> is Error NO 4\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433657"
            },
            {
                "content": "2020-07-25/14:44:44 this <HighLightTag>log</HighLightTag> is Error NO 3\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433656"
            },
            {
                "content": "2020-07-25/14:44:43 this <HighLightTag>log</HighLightTag> is Error NO 2\n",
                "labels": {
                    "hostName": "ecs-kwxtest",
                    "hostIP": "192.168.0.156",
                    "appName": "default_appname",
                    "containerName": "CONFIG_FILE",
                    "clusterName": "CONFIG_FILE",
                    "hostId": "9787ef31-fd7b-4eff-ba71-72d580f11f55",
                    "podName": "default_procname",
                    "clusterId": "CONFIG_FILE",
                    "nameSpace": "CONFIG_FILE",
                    "category": "LTS"
                },
                "line_num": "1595659490239433655"
            }
        ]
    }

Status code: 400

The request is invalid. Modify the request based on the description in error_msg before a retry.

{ 
  "error_code" : "LTS.0009", 
  "error_msg" : "Failed to validate the request body" 
}

Status code: 401

Authentication failed. Check the token and try again.

{ 
  "error_code" : "LTS.0003", 
  "error_msg" : "Invalid token" 
}

Status code: 403

The server understood the request but refused to authorize it. The client should not repeat the request without modifications.

{ 
  "error_code" : "LTS.0001", 
  "error_msg" : "Invalid projectId" 
}

Status code: 500

The server has received the request but encountered an internal error.

{ 
  "error_code" : "LTS.0202", 
  "error_msg" : "Failed to query lts log" 
}

Status Codes

Status Code

Description

200

The request is successful.

400

The request is invalid. Modify the request based on the description in error_msg before a retry.

401

Authentication failed. Check the token and try again.

403

The server understood the request but refused to authorize it. The client should not repeat the request without modifications.

500

The server has received the request but encountered an internal error.

503

The requested service is unavailable.

Error Codes

For details, see Error Codes.

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