Creating custom EventLog source in windows azure

If you have tried to execute the following code on windows azure then no doubt you have run into a security violation. In fact if you try and run the same example on your local machine you will also get the same error as creating an custom event source on windows requires that it be performed by an Administrator.
	EventLog.CreateEventSource("MyCustomSource", "Application");
In order to create a custom event source in windows azure do the following:
1) Create a cmd script using notepad with the following content
EventCreate /L Application /T Information /ID 900 /SO "MyCustomSource" /D "Custom source for logging my custom events" 

Here are the options for EventCreate.exe /?
 EVENTCREATE [/S system [/U username [/P [password]]]] /ID eventid
            [/L logname] [/SO srcname] /T type /D description

    This command line tool enables an administrator to create
    a custom event ID and message in a specified event log.

Parameter List:
    /S    system           Specifies the remote system to connect to.

    /U    [domain\]user    Specifies the user context under which
                           the command should execute.

    /P    [password]       Specifies the password for the given
                           user context. Prompts for input if omitted.

    /L    logname          Specifies the event log to create
                           an event in.

    /T    type             Specifies the type of event to create.
                           Valid types: SUCCESS, ERROR, WARNING, INFORMATION.

    /SO   source           Specifies the source to use for the
                           event (if not specified, source will default
                           to 'eventcreate'). A valid source can be any
                           string and should represent the application
                           or component that is generating the event.

    /ID   id               Specifies the event ID for the event. A
                           valid custom message ID is in the range
                           of 1 - 1000.

    /D    description      Specifies the description text for the new event.

    /?                     Displays this help message.

2) In your windows azure web role  create a folder called Startup and place the CMD file created above in it
3) Right click on the cmd file in solution explorer and select properties and set the "Copy to output directory" to "Copy if newer"
4) Open the ServiceDefinition.csdef file and add the startup section as shown below. 
Finished. Now wasnt that simple ;-)
Ok, so now you no longer need code that checks if it exists as that will throw a security exception. Now you just write to the EventLog as usual but now using your new custom source.
EventLog.WriteEntry("MyCustomSource", "This is my event log message")
I also want to give credit to Walter Mayers for pointing out the cmd script approach to creating the custom event source

Comments (2) -

  • Hi,
    Your article are really awesome,Actually I was in search for some good articles on Create Log Event in Windows Azure and finally I got one.
    The most important thing of this article is the simplicity which will be very helpful for the beginners. There are some good articles too I was found which also helped me. These articles links are....

    Thanks Everyone for your nice post.

  • Is not missing all DiagnosticMonitorConfiguration stuff?

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