IIS Logs on Windows

Create IIS Config for fluent-bit

You can download an example configuration for IIS below. Please make sure to edit the config so the correct host and token are provided. Also if your IIS service is generating logs to a different path, please make sure to edit the path where the logs are located as well.
Also, make sure to edit the parsers.conf path to the folder where you installed your fluent-bit agent.
Parsers_file C:\test\td-agent-bit-1.8.6-win64\conf\parsers.conf
Log_Level error
Name tail
Parser iis
Path C:\\inetpub\logs\\LogFiles\\W3SVC1\\u_ex*.log
Path_Key On
Tag logiq
Buffer_Max_Size 1024k
Read_from_Head On
Name record_modifier
Match logiq
Record cluster_id iiscluster
Record namespace iisnamespace
Record app_name iisappname
Record hostname iishostname
Name http
Match *
Host <host>
Port 443
URI /v1/json_batch
Format json
tls on
tls.verify off
net.keepalive off
compress gzip
Header Authorization Bearer <Ingest token>

IIS parsers.conf

Name iis
Format regex
Regex ^(?<timestamp>\d{4}-\d{2}-\d{2} \d{2}:\d{2}:[\d\.]+) (?<message>.*)$|^(?<raw_message>.*)$
Time_Key timestamp
Time_Keep On
Time_Format %Y-%m-%d %H:%M:%S

Multiple Source Fluent-bit Configuration

Fluent-bit service can gather data sources from multiple locations such as log files from a different directory. There can be multiple [INPUT] and [FILTER] section blocks within a td-fluent.conf file and each [INPUT] and [FILTER] block is linked via [INPUT] Tag and [FILTER] Matching pairs. Below shows an example partial configuration file.
Name tail
Parser iis
Path C:\\inetpub\logs\\LogFiles\\W3SVC1\\u_ex1311.log
Path_Key On
Tag logiq1
Buffer_Max_Size 1024k
Read_from_Head On
Name tail
Parser iis
Path C:\\inetpub\logs\\LogFiles\\W3SVC1\\u_ex1312.log
Path_Key On
Tag logiq2
Buffer_Max_Size 1024k
Read_from_Head On
Name record_modifier
Match logiq1
Record cluster_id iiscluster1
Record namespace iisnamespace1
Record app_name iisappname1
Record hostname iishostname1
Name record_modifier
Match logiq2
Record cluster_id iiscluster2
Record namespace iisnamespace2
Record app_name iisappname2
Record hostname iishostname2

Install and Enable Windows Fluent-bit Service

Follow the steps in Installing fluent-bit for windows to setup your fluent-bit agent and service. Use the modified config file above to match your environment during the setup process.
Fluent-bit service will automatically started upon the end of the script installation. However, one can use Windows service mangement tool to control its state. Below show how to start the Windows service tool GUI.
After the Windows Service tool got enabled, one can scroll the service list to Fluent-bit service and right-click the mouse to change the Fluent-bit Start/Stop/Restart state; see below.

Example Ingested IIS Logs