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    Alarm Notification Variable

    마지막 업데이트 시간:2024-01-20 17:59:36
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      When setting the notification content and custom webhook configuration in an alarm policy, you can use alarm notification variables to customize the notification content and include a clearer cause description.

      Getting Started

      When configuring an alarm policy, enter the following configuration information for the notification content:
      Detailed log:
      {{.QueryLog[0][0]}}
      The configured information should be as follows:
      When the alarm notification is received, the notification content will be automatically replaced with the following value, indicating the last detailed log when the alarm is triggered:
      Detailed log:
      {"content":{"body_bytes_sent":"33352","http_referer":"-","http_user_agent":"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.17 Safari/537.36","remote_addr":"201.80.83.199","remote_user":"-","request_method":"GET","request_uri":"/content/themes/test-com/images/header_about.jpg","status":"404","time_local":"01/Nov/2018:01:16:31"},"fileName":"/root/testLog/nginx.log","pkg_id":"285A243662909DE3-70A","source":"172.17.0.2","time":1653831150008,"topicId":"a54de372-ffe0-49ae-a12e-c340bb2b03f2"}

      Notification Variables

      Variable
      Configuration
      Sample Variable Value
      Description
      {{.UIN}}
      Account ID
      100007xxx827
      -
      {{.Nickname}}
      Account nickname
      xx company
      -
      {{.Region}}
      Region
      Guangzhou
      -
      {{.Alarm}}
      Alarm policy name
      Too many NGINX error logs
      -
      {{.AlarmID}}
      Alarm policy ID
      notice-3abd7ad6-15b7-4168-xxxx-52e5b961a561
      -
      {{.ExecuteQuery}}
      Executed Statement
      ["status:>=400 | select count(*) as errorLogCount","status:>=400 | select count(*) as errorLogCount,request_uri group by request_uri order by count(*) desc"]
      It is an array. {{.ExecuteQuery[0]}} indicates the detailed log of the first query statement, {{.ExecuteQuery[1]}} the second, and so on.
      {{.Condition}}
      Trigger Condition
      $1.errorLogCount > 1
      -
      {{.HappenThreshold}}
      Number of times the trigger condition needs to be constantly met before an alarm is triggered
      1
      -
      {{.AlertThreshold}}
      Alarm interval
      15
      Unit: Minute
      {{.Topic}}
      Log topic name
      nginxLog
      -
      {{.TopicId}}
      Log topic ID
      a54de372-ffe0-49ae-xxxx-c340bb2b03f2
      -
      {{.StartTime}}
      Time when the alarm is triggered for the first time
      2022-05-28 18:56:37
      Time zone: Asia/Shanghai
      {{.StartTimeUnix}}
      Timestamp when the alarm is triggered for the first time
      1653735397099
      UNIX timestamp in milliseconds
      {{.NotifyTime}}
      Time of this alarm notification
      2022-05-28 19:41:37
      Time zone: Asia/Shanghai
      {{.NotifyTimeUnix}}
      Timestamp of this alarm notification
      1653738097099
      UNIX timestamp in milliseconds
      {{.NotifyType}}
      Alarm notification type
      1
      Valid values: `1` (alarmed), `2` (resolved)
      {{.ConsecutiveAlertNums}}
      Number of consecutive alarms
      2
      -
      {{.Duration}}
      Alarm duration
      0
      Unit: Minute
      {{.TriggerParams}}
      Alarm trigger parameter
      $1.errorLogCount=5;
      -
      {{.ConditionGroup}}
      Group information when the alarm is triggered
      {"$1.AppName":"userManageService"}
      This is valid only when triggering by group is enabled in the alarm policy.
      {{.DetailUrl}}
      URL of the alarm details page
      https://alarm.cls.tencentcs.com/MDv2xxJh
      No login is required.
      {{.QueryUrl}}
      URL of the search and analysis statement in the first query statement
      https://alarm.cls.tencentcs.com/T0pkxxMA
      -
      {{.Message}}
      Notification content
      -
      It indicates the **notification content** entered in the alarm policy.
      {{.QueryResult}}
      Execution result of the query statement
      For more information, see the {{.QueryResult}} remarks.
      -
      {{.QueryLog}}
      Detailed log matching the search condition of the query statement
      For more information, see the {{.QueryLog}} remarks.
      -
      {{.AnalysisResult}}
      Multi-dimensional analysis result
      For more information, see the {{.AnalysisResult}} remarks.
      This variable is valid only when an alarm is triggered and becomes invalid when the alarm is cleared.
      Below are relevant descriptions:
      
      {{.QueryResult}}
      
      Description: Execution result of the query statement
      Remarks: It is an array. {{.QueryResult[0]}} indicates the execution result of the first query statement, {{.QueryResult[1]}} the second, and so on.
      Sample variable value: If there are two query statements in the alarm policy:
      The first query statement: status:>=400 | select count(*) as errorLogCount
      The second query statement: status:>=400 | select count(*) as errorLogCount,request_uri group by request_uri order by count(*) desc
      Then the variable values are:
      [
        [{
            "errorLogCount": 7
        }],
        [{
            "errorLogCount": 3,
            "request_uri": "/apple-touch-icon-144x144.png"
        }, {
            "errorLogCount": 3,
            "request_uri": "/feed"
        }, {
            "errorLogCount": 1,
            "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
        }]
      ]
      {{.QueryLog}}
      Description: Detailed log matching the search condition of the query statement (excluding SQL filter condition)
      Remarks: It is an array. {{.QueryLog[0]}} indicates the detailed log of the first query statement, {{.QueryLog[1]}} the second, and so on. Up to last ten detailed logs can be contained in each query statement.
      Sample variable value:
      [
        [{
            "content": {
                "__TAG__": {
                    "pod": "nginxPod",
                    "cluster": "testCluster"
                },
                "body_bytes_sent": "32847",
                "http_referer": "-",
                "http_user_agent": "Opera/9.80 (Windows NT 6.1; U; en-US) Presto/2.7.62 Version/11.01",
                "remote_addr": "105.86.148.186",
                "remote_user": "-",
                "request_method": "GET",
                "request_uri": "/apple-touch-icon-144x144.png",
                "status": "404",
                "time_local": "01/Nov/2018:00:55:14"
            },
            "fileName": "/root/testLog/nginx.log",
            "pkg_id": "285A243662909DE3-5CD",
            "source": "172.17.0.2",
            "time": 1653739000013,
            "topicId": "a54de372-ffe0-49ae-a12e-c340bb2b03f2"
        }, {
            "content": {
                "__TAG__": {
                    "pod": "nginxPod",
                    "cluster": "testCluster"
                },
                "body_bytes_sent": "33496",
                "http_referer": "-",
                "http_user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36",
                "remote_addr": "222.18.168.242",
                "remote_user": "-",
                "request_method": "GET",
                "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html",
                "status": "404",
                "time_local": "01/Nov/2018:00:54:37"
            },
            "fileName": "/root/testLog/nginx.log",
            "pkg_id": "285A243662909DE3-5C8",
            "source": "172.17.0.2",
            "time": 1653738975008,
            "topicId": "a54de372-ffe0-49ae-a12e-c340bb2b03f2"
        }]
      ]
      {{.AnalysisResult}}
      Description: Multi-dimensional analysis result
      Remarks: It is an object. The level-1 object corresponds to each multi-dimensional analysis result, with the key being the multi-dimensional analysis name and the value being the multi-dimensional analysis result. This variable is valid only when an alarm is triggered (that is, {{.NotifyType}}=1) and becomes invalid when the alarm is cleared (that is, {{.NotifyType}}=2).
      Sample variable value: If there are three multi-dimensional analysis operations in the alarm policy:
      Name: Top URL
      Type: Top 5 field values by occurrence and their percentages
      Field: request_uri
      
      Name: Error log URL distribution
      Type: Custom search and analysis
      Analysis statement: status:>=400 | select count(*) as errorLogCount,request_uri group by request_uri order by count(*) desc
      
      Name: Detailed error log
      Type: Custom search and analysis
      Analysis statement: status:>=400
      Then the variable values are:
      {
        "Top URL": [{
            "count": 77,
            "ratio": 0.45294117647058824,
            "value": "/"
        }, {
            "count": 20,
            "ratio": 0.11764705882352941,
            "value": "/favicon.ico"
        }, {
            "count": 7,
            "ratio": 0.041176470588235294,
            "value": "/blog/feed"
        }, {
            "count": 5,
            "ratio": 0.029411764705882353,
            "value": "/test-tile-service"
        }, {
            "count": 3,
            "ratio": 0.01764705882352941,
            "value": "/android-chrome-192x192.png"
        }],
        "Detailed error log": [{
            "content": {
                "__TAG__": {
                    "pod": "nginxPod",
                    "cluster": "testCluster"
                },
                "body_bytes_sent": "32847",
                "http_referer": "-",
                "http_user_agent": "Opera/9.80 (Windows NT 6.1; U; en-US) Presto/2.7.62 Version/11.01",
                "remote_addr": "105.86.148.186",
                "remote_user": "-",
                "request_method": "GET",
                "request_uri": "/apple-touch-icon-144x144.png",
                "status": "404",
                "time_local": "01/Nov/2018:00:55:14"
            },
            "fileName": "/root/testLog/nginx.log",
            "pkg_id": "285A243662909DE3-5CD",
            "source": "172.17.0.2",
            "time": 1653739000013,
            "topicId": "a54de372-ffe0-49ae-a12e-c340bb2b03f2"
        }, {
            "content": {
                "__TAG__": {
                    "pod": "nginxPod",
                    "cluster": "testCluster"
                },
                "body_bytes_sent": "33496",
                "http_referer": "-",
                "http_user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36",
                "remote_addr": "222.18.168.242",
                "remote_user": "-",
                "request_method": "GET",
                "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html",
                "status": "404",
                "time_local": "01/Nov/2018:00:54:37"
            },
            "fileName": "/root/testLog/nginx.log",
            "pkg_id": "285A243662909DE3-5C8",
            "source": "172.17.0.2",
            "time": 1653738975008,
            "topicId": "a54de372-ffe0-49ae-a12e-c340bb2b03f2"
        }],
        "Error log URL distribution": [{
            "errorLogCount": 3,
            "request_uri": "/apple-touch-icon-144x144.png"
        }, {
            "errorLogCount": 3,
            "request_uri": "/feed"
        }, {
            "errorLogCount": 1,
            "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
        }]
      }

      Variable Syntax

      The variable syntax is similar to Go template syntax. It extracts and formats alarm notification variables so that they can be displayed more clearly in the alarm notification content. All variables and their syntaxes are within {{ }}, and text outside {{ }} won't be processed.

      Variable extraction

      Syntax format:
      {{.variable[x]}} or {{index .variable x}}
      {{.variable.childNodeName}} or {{index .variable "childNodeName"}}
      Syntax description:
      When the variable is an array, {{.variable[x]}} (equivalent to {{index .variable x}}) is used to extract array elements by subscript. Here, x is an integer greater than or equal to 0.
      When the variable is an object, {{.variable.childNodeKey}} (equivalent to {{index .variable "childNodeName"}}) is used to extract sub-object values (value) by sub-object name (key).
      Note:
      When a sub-object name contains spaces, use syntax in the format of {{index .variable "childNodeName"}}, such as {{index .AnalysisResult "Top URL"}}.
      Sample: The {{.QueryResult}} variable values are:
      [
          [{
              "errorLogCount": 7 // Extract the value
          }],
          [{
              "errorLogCount": 3,
              "request_uri": "/apple-touch-icon-144x144.png"
          }, {
              "errorLogCount": 3,
              "request_uri": "/feed"
          }, {
              "errorLogCount": 1,
              "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
          }]
      ]
      Get the errorLogCount value of the first array through the following expression:
      {{.QueryResult[0][0].errorLogCount}}
      Returned result:
      7

      Loop and traversal

      Syntax format:
      {{range .variable}}
      Custom content{{.childNode1}}custom content{{.childNode2}}...
      {{end}}
      Or
      {{range $key,$value := .variable}}
      Custom content{{$key}}custom content{{$value}}...
      {{end}}
      Syntax description:
      When the variable is an array or an object that contains multiple sub-objects, you can use this syntax to display each element/object in the specified format.
      Sample:
      The {{.QueryResult}} variable values are:
      [
          [{
              "errorLogCount": 7
          }],
          [{
              "errorLogCount": 3,
              "request_uri": "/apple-touch-icon-144x144.png"
          }, {
              "errorLogCount": 3,
              "request_uri": "/feed"
          }, {
              "errorLogCount": 1,
              "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
          }]
      ]
      Display the errorLogCount value of each request_uri in the second array through the following expression:
      {{range .QueryResult[1]}}
      * {{.request_uri}} error log quantity: {{.errorLogCount}}
      {{end}}
      Returned result:
      
      * /apple-touch-icon-144x144.png error log quantity: 3
      
      * /feed error log quantity: 3
      
      * /opt/node_apps/test-v5/app/themes/basic/public/static/404.html error log quantity: 1
      
      

      Condition judgment

      Syntax format:
      {{if boolen}}
      xxx
      {{end}}
      Or
      {{if boolen}}
      xxx
      {{else}}
      xxx
      {{end}}
      Or
      {{if boolen}}
      xxx
      {{else if boolen}}
      xxx
      {{end}}
      Syntax description:
      Execute the expressions based on the condition judgment result, where AND, OR, and NOT can be used for logical operations and values can be compared.
      eq arg1 arg2: When arg1 == arg2, the value is `true`. 
      ne arg1 arg2: When arg1 != arg2, the value is `true`. 
      lt arg1 arg2: When arg1 < arg2, the value is `true`. 
      le arg1 arg2: When arg1 <= arg2, the value is `true`. 
      gt arg1 arg2: When arg1 > arg2, the value is `true`. 
      ge arg1 arg2: When arg1 >= arg2, the value is `true`.
      Sample:
      The {{.QueryResult}} variable values are:
      [
          [{
              "errorLogCount": 7
          }],
          [{
              "errorLogCount": 3,
              "request_uri": "/apple-touch-icon-144x144.png"
          }, {
              "errorLogCount": 3,
              "request_uri": "/feed"
          }, {
              "errorLogCount": 1,
              "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
          }]
      ]
      Display the request_uri that is ≥ 2 and ≤ 100 and its errorLogCount value in the second array through the following expression:
      {{range .QueryResult[1]}}
      {{if and (ge .errorLogCount 2) (le .errorLogCount 100)}}
      * {{.request_uri}} error log quantity: {{.errorLogCount}}
      {{end}}
      {{end}}
      Returned result:
      
      
      * /apple-touch-icon-144x144.png error log quantity: 3
      
      
      
      * /feed error log quantity: 3
      
      
      
      
      You can also use if to check whether the field value exists. If the field value is an empty string or does not exist, it is equivalent to false. For example:
      {{if .QueryLog[0][0].apple}}
      apple exist, value is : {{.QueryLog[0][0].apple}}
      {{else}}
      apple is not exist
      {{end}}

      Blank area removal

      Syntax format:
      {{- xxx}} or {{xxx -}}
      Syntax description:
      When the variable syntax is executed, its spaces, indents, line breaks, and other blank areas will be retained. For example, many blank lines are contained in the returned result of the samples for loop and traversal as well as condition judgment, adversely affecting the display effect. You can add - at the beginning or end in {{ }} to remove blank areas.
      Sample:
      Change the expression in the condition judgment sample to:
      {{- range .QueryResult[1]}}
      {{- if and (ge .errorLogCount 2) (le .errorLogCount 100)}}
      * {{.request_uri}} error log quantity: {{.errorLogCount}}
      {{- end}}
      {{- end}}
      Returned result:
      * /apple-touch-icon-144x144.png error log quantity: 3
      * /feed error log quantity: 3

      Variable Function

      Special symbol escaping

      Syntax format:
      {{escape .variable}}
      Syntax description:
      Many alarm variables contain special symbols. If these variables are directly concatenated into JSON strings for custom webhooks, the JSON format may be incorrect, leading to callback failures. In this case, you can escape the original variables before they are concatenated.
      Sample:
      The {{.ExecuteQuery[0]}} variable value is status:>=400 | select count(*) as "error log quantity". If escaping is not used, the request content in the custom webhook configuration will be:
      {
        "Query":"{{.ExecuteQuery[0]}}"
      }
      The returned result will be as follows, which is not a valid JSON string:
      
      {
         "Query":"status:>=400 | select count(*) as "error log quantity""
      }
      
      In this case, you can use escaping to change the request content in the custom webhook configuration to:
      {
        "Query":"{{escape .ExecuteQuery[0]}}"
      }
      The returned result will be as follows, which is in line with the JSON syntax:
      {
        "Query":"status:>=400 | select count(*) as \\"error log quantity\\""
      }
      

      String extraction

      Extraction by length

      Syntax format:
      {{substr .variable start}} or {{substr .variable start length}}
      Syntax description:
      Extract a string based on the specified start point and length (optional).
      Sample:
      The {{.QueryLog[0][0].fileName}} variable value is:
      /root/testLog/nginx.log
      Get a string starting from the sixth character and containing seven characters through the following expression:
      {{substr .QueryLog[0][0].fileName 6 7 }}
      Returned result:
      testLog

      Extraction based on the start and end characters

      Syntax format:
      {{extract .variable "startstring" ["endstring"]}}
      Syntax description:
      Extract a string based on the specified start and end characters (optional).
      Sample:
      The {{.QueryLog[0][0].fileName}} variable value is:
      /root/testLog/nginx.log
      Get a string between /root/ and /nginx through the following expression:
      {{extract .QueryLog[0][0].fileName "/root/" "/nginx"}}
      Returned result:
      testLog

      Specified string check

      Syntax format:
      {{containstr .variable "searchstring"}}
      Syntax description:
      Check whether the specified string is included in the variable value. The check result can be used in the condition judgment syntax.
      Sample:
      The {{.QueryLog[0][0].fileName}} variable value is:
      /root/testLog/nginx.log
      Get a string between /root/ and /nginx through the following expression:
      {{if containstr .QueryLog[0][0].fileName "test"}}
      Test log
      {{else}}
      Non-test log
      {{end}}
      Returned result:
      Test log

      UNIX timestamp conversion

      Syntax format:
      {{fromUnixTime .variable}} or {{fromUnixTime .variable "timezone"}}
      Syntax description:
      It is used to convert UNIX timestamps (in milliseconds or seconds) into readable dates and times. Here, the time zone is optional and is Asia/Shanghai by default.
      Sample:
      The {{.QueryLog[0][0].time}} variable value is:
      1653893435008
      Get the dates and times in different time zones through the following expressions:
      {{fromUnixTime .QueryLog[0][0].time}}
      {{fromUnixTime .QueryLog[0][0].time "Asia/Shanghai"}}
      {{fromUnixTime .QueryLog[0][0].time "Asia/Tokyo"}}
      Returned result:
      
      2022-05-30 14:50:35.008 +0800 CST
      2022-05-30 14:50:35.008 +0800 CST
      2022-05-30 15:50:35.008 +0900 JST
      

      String concatenation

      Syntax format:
      {{concat .variable1 .variable2 ...}}
      Syntax description:
      Concatenate specified variables or strings.
      Sample:
      Concatenate the region and alarm policy name.
      {{concat .Region .Alarm}}
      Returned result:
      Guangzhou alarmTest

      Base64/Base64URL/URL encoding and decoding

      Syntax format:
      {{base64_encode .variable}}
      {{base64_decode .variable}}
      {{base64url_encode .variable}}
      {{base64url_decode .variable}}
      {{url_encode .variable}}
      {{url_decode .variable}}
      Syntax description:
      Encode or decode specified variables or strings. Here, the "=" at the end will not be removed or added during Base64URL encoding and decoding.
      Sample:
      {{base64_encode "test"}}
      {{base64_decode "dGVzdOa1i+ivlQ=="}}
      {{base64url_encode "test"}}
      {{base64url_decode "dGVzdOa1i-ivlQ=="}}
      {{url_encode "https://console.tencentcloud.com:80/cls?region=ap-chongqing"}}
      {{url_decode "https%3A%2F%2Fconsole.cloud.tencent.com%3A80%2Fcls%3Fregion%3Dap-chongqing"}}
      Returned result:
      dGVzdOa1i+ivlQ==
      test
      dGVzdOa1i-ivlQ==
      test
      https%3A%2F%2Fconsole.cloud.tencent.com%3A80%2Fcls%3Fregion%3Dap-chongqing
      https://console.tencentcloud.com:80/cls?region=ap-chongqing

      MD5/SHA1/SHA256/SHA512 encryption

      Syntax format:
      {{md5 .variable}}
      {{md5 .variable | base64_encode}}
      {{md5 .variable | base64url_encode}}
      {{sha1 .variable}}
      {{sha1 .variable | base64_encode}}
      {{sha1 .variable | base64url_encode}}
      {{sha256 .variable}}
      {{sha256 .variable | base64_encode}}
      {{sha256 .variable | base64url_encode}}
      {{sha512 .variable}}
      {{sha512 .variable | base64_encode}}
      {{sha512 .variable | base64url_encode}}
      Syntax description:
      Encrypt specified variables or strings using a certain encryption algorithm. By default, hexadecimal strings are returned, which can be converted into Base64 or Base64URL as needed.
      Sample:
      {{md5 "test"}}
      {{md5 "test" | base64_encode}}
      {{md5 "test" | base64url_encode}}
      {{sha1 "test"}}
      {{sha1 "test" | base64_encode}}
      {{sha1 "test" | base64url_encode}}
      {{sha256 "test"}}
      {{sha256 "test" | base64_encode}}
      {{sha256 "test" | base64url_encode}}
      {{sha512 "test"}}
      {{sha512 "test" | base64_encode}}
      {{sha512 "test" | base64url_encode}}
      Returned result:
      098F6BCD4621D373CADE4E832627B4F6
      CY9rzUYh03PK3k6DJie09g==
      CY9rzUYh03PK3k6DJie09g==
      A94A8FE5CCB19BA61C4C0873D391E987982FBBD3
      qUqP5cyxm6YcTAhz05Hph5gvu9M=
      qUqP5cyxm6YcTAhz05Hph5gvu9M=
      9F86D081884C7D659A2FEAA0C55AD015A3BF4F1B2B0B822CD15D6C15B0F00A08
      n4bQgYhMfWWaL+qgxVrQFaO/TxsrC4Is0V1sFbDwCgg=
      n4bQgYhMfWWaL-qgxVrQFaO_TxsrC4Is0V1sFbDwCgg=
      EE26B0DD4AF7E749AA1A8EE3C10AE9923F618980772E473F8819A5D4940E0DB27AC185F8A0E1D5F84F88BC887FD67B143732C304CC5FA9AD8E6F57F50028A8FF
      7iaw3Ur350mqGo7jwQrpkj9hiYB3Lkc/iBml1JQODbJ6wYX4oOHV+E+IvIh/1nsUNzLDBMxfqa2Ob1f1ACio/w==
      7iaw3Ur350mqGo7jwQrpkj9hiYB3Lkc_iBml1JQODbJ6wYX4oOHV-E-IvIh_1nsUNzLDBMxfqa2Ob1f1ACio_w==

      HMAC_MD5/HMAC_SHA1/HMAC_SHA256/HMAC_SHA512 encryption

      Syntax format:
      {{hmac_md5 .variable "Secretkey"}}
      {{hmac_md5 .variable "Secretkey" | base64_encode}}
      {{hmac_md5 .variable "Secretkey" | base64url_encode}}
      {{hmac_sha1 .variable "Secretkey"}}
      {{hmac_sha1 .variable "Secretkey" | base64_encode}}
      {{hmac_sha1 .variable "Secretkey" | base64url_encode}}
      {{hmac_sha256 .variable "Secretkey"}}
      {{hmac_sha256 .variable "Secretkey" | base64_encode}}
      {{hmac_sha256 .variable "Secretkey" | base64url_encode}}
      {{hmac_sha512 .variable "Secretkey"}}
      {{hmac_sha512 .variable "Secretkey" | base64_encode}}
      {{hmac_sha512 .variable "Secretkey" | base64url_encode}}
      Syntax description:
      Encrypt specified variables or strings using a certain encryption algorithm. By default, hexadecimal strings are returned, which can be converted into Base64 or Base64URL as needed. Here, Secretkey is the key in the HMAC encryption algorithm and can be modified as needed.
      Sample:
      {{hmac_md5 "test" "Secretkey"}}
      {{hmac_md5 "test" "Secretkey" | base64_encode}}
      {{hmac_md5 "test" "Secretkey" | base64url_encode}}
      {{hmac_sha1 "test" "Secretkey"}}
      {{hmac_sha1 "test" "Secretkey" | base64_encode}}
      {{hmac_sha1 "test" "Secretkey" | base64url_encode}}
      {{hmac_sha256 "test" "Secretkey"}}
      {{hmac_sha256 "test" "Secretkey" | base64_encode}}
      {{hmac_sha256 "test" "Secretkey" | base64url_encode}}
      {{hmac_sha512 "test" "Secretkey"}}
      {{hmac_sha512 "test" "Secretkey" | base64_encode}}
      {{hmac_sha512 "test" "Secretkey" | base64url_encode}}
      Returned result:
      E7B946D930658699AA668601E33E87CE
      57lG2TBlhpmqZoYB4z6Hzg==
      57lG2TBlhpmqZoYB4z6Hzg==
      2AB64F124D932F5033EAC7AF392AC5CC4D52F503
      KrZPEk2TL1Az6sevOSrFzE1S9QM=
      KrZPEk2TL1Az6sevOSrFzE1S9QM=
      FC49EBC05209B1359773D87C216BA85BCE0163FDE459EA37AB603EC9D8445D23
      /EnrwFIJsTWXc9h8IWuoW84BY/3kWeo3q2A+ydhEXSM=
      _EnrwFIJsTWXc9h8IWuoW84BY_3kWeo3q2A-ydhEXSM=
      D18DF3D943F74769A8B66E43D7EF03639BB6B8B8A2EBC9976170DC58EEE58BE98478F3183E4B5AA3481DE12026AAE3843F8213B39D639EAC6EE93734EA667BC5
      0Y3z2UP3R2motm5D1+8DY5u2uLii68mXYXDcWO7li+mEePMYPktao0gd4SAmquOEP4ITs51jnqxu6Tc06mZ7xQ==
      0Y3z2UP3R2motm5D1-8DY5u2uLii68mXYXDcWO7li-mEePMYPktao0gd4SAmquOEP4ITs51jnqxu6Tc06mZ7xQ==

      Use Cases

      Case 1: Displaying the last detailed log in the alarm notification

      Scenario: The last detailed log that meets the search condition of the query statement is added to the alarm notification in the format of key:value. There is a key in each row, and CLS preset fields and metadata fields are not included.
      Notification content configuration:
      {{range $key,$value := .QueryLog[0][0].content}}
      {{if not (containstr $key "__TAG__")}}
      {{- $key}}:{{$value}}
      {{- end}}
      {{- end}}
      Here, .QueryLog[0][0] indicates the last detailed log that meets the search condition of the first query statement in the alarm policy. Its value is:
      {
          "content": {
              "__TAG__": {
                  "a": "b12fgfe",
                  "c": "fgerhcdhgj"
              },
              "body_bytes_sent": "33704",
              "http_referer": "-",
              "http_user_agent": "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36",
              "remote_addr": "247.0.249.191",
              "remote_user": "-",
              "request_method": "GET",
              "request_uri": "/products/hadoop)",
              "status": "404",
              "time_local": "01/Nov/2018:07:54:08"
          },
          "fileName": "/root/testLog/nginx.log",
          "pkg_id": "285A243662909DE3-210B",
          "source": "172.17.0.2",
          "time": 1653908859008,
          "topicId": "a54de372-ffe0-49ae-a12e-c340bb2b03f2"
      }
      Alarm notification content:
      remote_addr:247.0.249.191
      time_local:01/Nov/2018:07:54:08
      http_user_agent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36
      remote_user:-
      http_referer:-
      body_bytes_sent:33704
      request_method:GET
      request_uri:/products/hadoop)
      status:404

      Case 2: Displaying the execution result of the query statement in the alarm notification

      Scenario: What meets the trigger condition in the execution result of the query statement is added to the alarm notification and displayed in a list. The query statement of the alarm policy is status:>=400 | select count(*) as errorLogCount,request_uri group by request_uri order by count(*) desc. The trigger condition is $1.errorLogCount > 10.
      Notification content configuration:
      {{range .QueryResult[0]}}
      {{- if gt .errorLogCount 10}}
      {{.request_uri}} error log quantity: {{.errorLogCount}}
      {{- end}}
      {{- end}}
      Here, .QueryResult[0] indicates the execution result of the first query statement in the alarm policy. Its value is:
      [{
          "errorLogCount": 161,
          "request_uri": "/apple-touch-icon-144x144.png"
      }, {
          "errorLogCount": 86,
          "request_uri": "/opt/node_apps/test-v5/app/themes/basic/public/static/404.html"
      }, {
          "errorLogCount": 33,
          "request_uri": "/feed"
      }, {
          "errorLogCount": 26,
          "request_uri": "/wp-login.php"
      }, {
          "errorLogCount": 10,
          "request_uri": "/safari-pinned-tab.svg"
      }, {
          "errorLogCount": 7,
          "request_uri": "/mstile-144x144.png"
      }, {
          "errorLogCount": 4,
          "request_uri": "/atom.xml"
      }, {
          "errorLogCount": 3,
          "request_uri": "/content/plugins/prettify-gc-syntax-highlighter/launch.js?ver=3.5.2?ver=3.5.2"
      }]
      Alarm notification content:
      /apple-touch-icon-144x144.png error log quantity: 161
      /opt/node_apps/elastic-v5/app/themes/basic/public/static/404.html error log quantity: 86
      /feed error log quantity: 33
      /wp-login.php error log quantity: 26
      
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