Powershell Write-event Log Error
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Powershell Check If Event Log Source Exists
& High Availability Windows Server Management PowerShell Hey Scripting Guy (PowerShell) Networking Identity, Access & Security Datacenter and Private Cloud Security Active Directory Enterprise Mobility Ask Directory Services Hey, Scripting Guy! Blog Learn about Windows PowerShell How to Use PowerShell to Write to Event Logs ★★★★★★★★★★★★★★★ June 20, 2013July 4, 2015 by The Scripting Guys // 26 Comments Share 0 0 Summary: Guest blogger, Jonathan Tyler, talks about how to write write-eventlog source does not exist to Windows event logs by using Windows PowerShell—and avoid errors in doing so. Microsoft Scripting Guy, Ed Wilson, is here. While I was at TechEd in New Orleans, I had the chance to talk to Jonathan Tyler. I see him from time-to-time, although he only lives a few hours away from us. Jonathan is an active member of the Windows PowerShell community, and he has written other posts for the Hey, Scripting Guy! Blog. I am happy to welcome back guest blogger, Jonathan Tyler… Let’s start with a poll. How many of you like to get feedback from your Windows PowerShell scripts, either by a verbose switch or in some sort of log file? Great, you can put your hands down. Now, how many of you like to get feedback from a script that you have running as a scheduled task? And now, how many simply write to a text file or simply forget about getting feedback unless you find that there is a problem? By the end of this post, I will show you how you can leverage the premier logging system on any Windows Server: the event log! If you work in an enterprise, you most likely have some type of central monitoring system that collects errors from your event
future errors. By Adam Bertram09/08/2016 An excellent PowerShell script is easy to troubleshoot when something goes wrong. When developing scripts, it's important to not just consider "working" a symbol of success but also that you have accounted for every possible path that
Write-eventlog The Source Was Not Found
script could take if an error is encountered. One action that you can implement powershell write-eventlog the source was not found into a script is logging. Logging can mean different things like logging to the console with Write-Verbose, Write-Warning or Writer-Error. It write-winevent could also mean logging to a text file with Add-Content or logging to the Windows event log. One of the benefits of logging to the event log is that it's semi-permanent and can easily be https://blogs.technet.microsoft.com/heyscriptingguy/2013/06/20/how-to-use-powershell-to-write-to-event-logs/ parsed later on and did you know that you can natively log directly to your event log of choice with built-in PowerShell cmdlets? Let's go over how to make that happen. The cmdlet that we'll be working with is Write-EventLog and New-EventLog. These are cmdlets that can be used to both write messages to existing event logs and create new event logs. In this case, we won't be creating new https://mcpmag.com/articles/2016/09/08/powershell-to-write-to-the-event-log.aspx event log but create new event log sources as you'll see in a minute. Let's say you have some long-running script that you'd like to monitor by giving periodic updates to the Application event log. I picked the Application event log at random here. You can choose any event log if you'd like. To demonstrate this, let's take a simple example of a logic path. In this instance, I'm testing to see if a file exists or not, and I'd like to log the status of that event somewhere. $filePath = C:\MyFile.txt if (Test-Path –Path $filePath) { ## This file exists } else { ## This file does not exist. } I'd like to write to the Application event log whether or not that file exists. I'll use the Write-EventLog cmdlet for this. To do so, I'll first need to figure out all of the parameters this cmdlet needs. At a minimum, I'll need LogName, Source, EventId, EntryType and Message. We know the log name, we can choose any event ID we'd like as long as it's an integer, the entry type is the event severity. This can be Error, Warning, Information, SuccessAudit or FailureAudit. The message can be anything you'd like. These parameters are all straightforward.
Byte[]] [CommonParameters] Key: -Category Int16 A task category for the event. Enter an integer that is associated with the strings in the category http://ss64.com/ps/write-eventlog.html message file for the event log. -ComputerName string Specify a remote http://www.jaapbrasser.com/psblogweek-powershell-logging-in-the-windows-event-log/ computer. The default is the local computer. Type the NetBIOS name, an Internet Protocol (IP) address, or a fully qualified domain name of a remote computer. This parameter does not rely on Windows PowerShell remoting. -EntryType EventLogEntryType The entry type of the event log event. Valid values are: Error, Warning, Information, SuccessAudit, FailureAudit. -EventID int The event identifier. This parameter is required. -logName string Name of the log file to which the event will be written. Enter the log name (the value of the Log property, not the LogDisplayName). Wildcard characters are not permitted. This parameter event log source is required. -Message string The event message. This parameter is required. -RawData Byte[] The binary data that is associated with the event, in bytes. -Source
#PSBlogWeek PowerShell blogging series. #PSBlogWeek is a regular event where anyone interested in writing great content about PowerShell is welcome to volunteer for. The purpose is to pool our collective PowerShell knowledge together over a 5-day period and write about a topic that anyone using PowerShell may benefit from. #PSBlogWeek is a Twitter hashtag so feel free to stay up to date on the topic on Twitter at the #PSBlogWeek hashtag. For more information on #PSBlogWeek or if you'd like to volunteer for future sessions, contact Adam Bertram (@adbertram) on Twitter. Once you're done getting schooled on everything this post has to offer head on over to the powershell.org announcement for links to the other four past and upcoming #PSBlogWeek articles this week! An important part of PowerShell scripting is error handling, one of the main differences between a script and a one-liner for me personally is error handling and dealing with exceptions that might occur. For more information on error handling please refer to the previous PSBlogWeek articles where Boe Prox dives into use Try-Catch in order to catch specific errors. When moving your scripts from into a production environment logging becomes more important, initially using plain text files for logging might be an appropriate solution. Another option however is writing logging information to the Windows Event Log. This has the benefit of being the centralized location where most logging takes place. Writing to the event log is relatively simple, the Write-EventLog cmdlet can be used for this purpose: By taking a look at the error message we see that the PowerShell event source is not registered with the application log, in order to resolve this, we can write to the Windows PowerShell event log instead: 1 Write-EventLog -LogName 'Windows PowerShell' -Source PowerShell -EventId 12345 -EntryType Information -Message 'Script started' Notice how the command now successfully executes without the error message, this is because it is important for the script Alternatively, it is also possible to specify a custom event provider, and register this to the correct event log as such: 1 2 Ne