This topic describes how to configure the IIS mode in the Log Service console to collect Internet Information Services (IIS) logs.

Background information

To meet log analysis requirements, we recommend that you use the W3C log format. Before you use Logtail to collect IIS logs, click Select Fields in the IIS Manager window. In the dialog box that appears, select Bytes Sent (sc-bytes) and Bytes Received (cs-bytes). For more information, see Analyze IIS access logs.W3C Extended Log File Format
If you select the W3C log format when you create a Logtail configuration, enter the content that corresponds to logFile logExtFileFlags field as the IIS configuration fields. For more information, see the following figure.
  • Default path of the IIS5 configuration file: C:\WINNT\system32\inetsrv\MetaBase.bin
  • Default path of the IIS6 configuration file: C:\WINDOWS\system32\inetsrv\MetaBase.xml
  • Default path of the IIS7 configuration file: C:\Windows\System32\inetsrv\config\applicationHost.config
IIS configuration file


  1. Log on to the Log Service console.
  2. In the Import Data section, select IIS - Text Log.
  3. In the Specify Logstore step, select the target project and Logstore, and click Next.
    You can also click Create Now to create a project and a Logstore. For more information, see Step 1: Create a project and a Logstore.
  4. In the Create Machine Group step, create a machine group.
    • If a machine group is available, click Using Existing Machine Groups.
    • This section uses ECS instances as an example to describe how to create a machine group. To create a machine group, perform the following steps:
      1. Install Logtail on ECS instances. For more information, see Install Logtail on ECS instances.

        If Logtail is installed on the ECS instances, click Complete Installation.

        Note If you need to collect logs from user-created clusters or servers of third-party cloud service providers, you must install Logtail on these servers. For more information, see Install Logtail in Linux or Install Logtail in Windows.
      2. After the installation is complete, click Complete Installation.
      3. On the page that appears, specify the parameters for the machine group. For more information, see Create an IP address-based machine group or Create a custom ID-based machine group.
  5. In the Machine Group Settings step, apply the configurations to the machine group.
    Select the created machine group and move the group from Source Server Groups to Applied Server Groups.
  6. In the Logtail Config step, create a Logtail configuration.
    Parameter Description
    Config Name The name of the Logtail configuration. The name cannot be modified after the Logtail configuration is created.

    You can also click Import Other Configuration to import Logtail configurations from other projects.

    Log Path The directory and name of the log file.
    The file names can be complete names or names that contain wildcards. For more information, visit Wildcard matching. The log files in all levels of subdirectories under a specified directory are monitored if the log files match the specified pattern. Examples:
    • /apsara/nuwa/ … /*.log indicates that the files whose extension is .log in the /apsara/nuwa directory and its subdirectories are monitored.
    • /var/logs/app_* … /*.log* indicates that each file that meets the following conditions is monitored: The file name contains .log. The file is stored in a subdirectory (at all levels) of the /var/logs directory. The name of the subdirectory matches the app_* pattern.
    • Each log file can be collected by using only one Logtail configuration file.
    • You can include only asterisks (*) and question marks (?) as wildcard characters in the log path.
    Blacklist If this switch is turned on, you can configure a blacklist in the Add Blacklist section. You can configure a blacklist to skip the specified directories or files during log data collection. The names of the specified directories and files support exact match and wildcard match. Examples:
    • If you select Filter by Directory from the Filter Type drop-down list and enter /tmp/mydir in the Content column, all files in the directory are skipped.
    • If you select Filter by File from the Filter Type drop-down list and enter /tmp/mydir/file in the Content column, only the specified file is skipped.
    Docker File If the file in the Docker container is a log file, you can directly specify the log path and container tags. Logtail automatically monitors the creation and destruction of containers, and collects log entries of the specified containers based on the specified tags. For more information about container text logs, see Use the console to collect Kubernetes text logs in the DaemonSet mode.
    Mode The default value is IIS Configuration Mode. You can select other modes. For more information about how to configure other modes, see Overview.
    Log Format Select the log format for the IIS server logs.
    • IIS: Microsoft IIS log file format
    • NCSA: NCSA Common log file format
    • W3C: W3C Extended Log File Format
    IIS Configuration Enter the log configuration section that is specified in an IIS configuration file.
    • If you set the log format to IIS or NCSA, the configuration fields are automatically generated.
    • If you set the log format to W3C, enter the content that corresponds to the logFile logExtFileFlags field in the IIS configuration file. For more information, see Background information.
    IIS Key Name Log Service extracts IIS key names based on the IIS configuration fields.
    Drop Failed to Parse Logs
    • Specifies whether to drop failed-to-parse logs. If you enable the Drop Failed to Parse Logs feature, logs that fail to be parsed are not uploaded to Log Service.
    • If you disable the Drop Failed to Parse Logs feature, raw logs are uploaded to Log Service when the raw logs fail to be parsed.
    Maximum Directory Monitoring Depth The maximum number of directory layers that can be recursively monitored during log collection. Valid values: 0 to 1000. The value 0 indicates that only the directory specified in the log path is monitored.
    You can configure advanced options based on your business requirements. We recommend that you do not modify the settings. The following table describes the parameters in the advanced options.
    Parameter Description
    Enable Plug-in Processing Specifies whether to enable the plug-in processing feature. If you enable this feature, plug-ins are used to process logs. For more information, see Process data.
    Upload Raw Log Specifies whether to upload raw logs. If you enable this feature, raw logs are written to the __raw__ field and uploaded together with the parsed logs.
    Topic Generation Mode
    • Null - Do not generate topic: This mode is selected by default. In this mode, the topic field is set to an empty string. You can query logs without the need to enter a topic.
    • Machine Group Topic Attributes: This mode is used to differentiate logs that are generated by different servers.
    • File Path Regex: In this mode, you must configure a regular expression in the Custom RegEx field. The part of a log path that matches the regular expression is used as the topic name. This mode is used to differentiate logs that are generated by different users or instances.
    Log File Encoding
    • utf8: indicates that UTF-8 encoding is used.
    • gbk: indicates that GBK encoding is used.
    Timezone The time zone where logs are collected. Valid values:
    • System Timezone: This option is selected by default. It indicates that the time zone where logs are collected is the same as the time zone to which the server belongs.
    • Custom: Select a time zone.
    Timeout The timeout period of log files. If a log file is not updated within the specified period, Logtail considers the file to be timed out. Valid values:
    • Never: All log files are continuously monitored and never time out.
    • 30 Minute Timeout: If a log file is not updated within 30 minutes, Logtail considers the file to be timed out and no longer monitors the file.

      If you select 30 Minute Timeout, you must specify the Maximum Timeout Directory Depth parameter. Valid values: 1 to 3.

    Filter Configuration The filter conditions that are used to collect logs. Only logs that match the specified filter conditions are collected. Examples:
    • Collect logs that meet a condition: Specify the filter condition to Key:level Regex:WARNING|ERROR if you need to collect only logs of only the WARNING or ERROR severity level.
    • Filter out logs that do not meet a condition:
      • Specify the filter condition to Key:level Regex:^(?!. *(INFO|DEBUG)). * if you need to filter out logs of the INFO or DEBUG severity level.
      • Specify the filter condition to Key:url Regex:. *^(?!.*(healthcheck)). * if you need to filter out logs whose URL contains the keyword healthcheck. For example, logs in which the value of the url key is /inner/healthcheck/jiankong.html are not collected.

    For more examples, visit regex-exclude-word and regex-exclude-pattern.

  7. In the Configure Query and Analysis step, configure the indexes.
    Indexes are configured by default. You can re-configure the indexes based on your business requirements. For more information, see Enable and configure the index feature for a Logstore.
    • You must configure Full Text Index or Field Search. If you configure both of them, the settings of Field Search are applied.
    • If the data type of index is long or double, the Case Sensitive and Delimiter settings are unavailable.

After you complete the settings, Log Service starts to collect logs.