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Adds Cmdlet for analysing EventLog content

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Lord Hepipud 2021-04-28 15:18:18 +02:00
parent d7a1745e39
commit 89764e5ba5
2 changed files with 94 additions and 0 deletions
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doc/31-Changelog.md
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@ -14,6 +14,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
### Enhancements
* [#234](https://github.com/Icinga/icinga-powershell-framework/pull/234) Adds support to allow custom exception lists for Icinga Exceptions, making it easier for different modules to ship their own exception messages
* [#235](https://github.com/Icinga/icinga-powershell-framework/pull/235) Adds new Cmdlet `Show-IcingaEventLogAnalysis` to get a better overview on how many log entries are present within the EventLog based on hour, minute and day average/maximum for allowing a more dynamic configuration for `Invoke-IcingaCheckEventLog`
### Bugfixes

93
lib/core/tools/Show-IcingaEventLogAnalysis.psm1 Normal file
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@ -0,0 +1,93 @@
function Show-IcingaEventLogAnalysis()
{
param (
[string]$LogName = 'Application'
);
Write-IcingaConsoleNotice 'Analysing EventLog "{0}"...' -Objects $LogName;
Start-IcingaTimer 'EventLog Analyser';
try {
$BasicLogData = Get-WinEvent -ListLog $LogName -ErrorAction Stop;
} catch {
Write-IcingaConsoleError 'Failed to fetch data for EventLog "{0}". Probably this log does not exist.' -Objects $LogName;
return;
}
Write-IcingaConsoleNotice 'Logging Mode: {0}' -Objects $BasicLogData.LogMode;
Write-IcingaConsoleNotice 'Maximum Size: {0} GB' -Objects ([math]::Round((Convert-Bytes -Value $BasicLogData.MaximumSizeInBytes -Unit 'GB').value, 2));
Write-IcingaConsoleNotice 'Current Entries: {0}' -Objects $BasicLogData.RecordCount;
[hashtable]$LogAnalysis = @{
'Day' = @{
'Entries' = @{ };
'Count' = 0;
'Average' = 0;
'Maximum' = 0;
};
'Hour' = @{
'Entries' = @{ };
'Count' = 0;
'Average' = 0;
'Maximum' = 0;
};
'Minute' = @{
'Entries' = @{ };
'Count' = 0;
'Average' = 0;
'Maximum' = 0;
};
};
$LogData = Get-WinEvent -LogName $LogName;
foreach ($entry in $LogData) {
[string]$DayOfLogging = $entry.TimeCreated.ToString('yyyy\/MM\/dd');
[string]$HourOfLogging = $entry.TimeCreated.ToString('yyyy\/MM\/dd-HH');
[string]$MinuteOfLogging = $entry.TimeCreated.ToString('yyyy\/MM\/dd-HH-mm');
if ($LogAnalysis.Day.Entries.ContainsKey($DayOfLogging) -eq $FALSE) {
$LogAnalysis.Day.Entries.Add($DayOfLogging, 0);
}
if ($LogAnalysis.Hour.Entries.ContainsKey($HourOfLogging) -eq $FALSE) {
$LogAnalysis.Hour.Entries.Add($HourOfLogging, 0);
}
if ($LogAnalysis.Minute.Entries.ContainsKey($MinuteOfLogging) -eq $FALSE) {
$LogAnalysis.Minute.Entries.Add($MinuteOfLogging, 0);
}
$LogAnalysis.Day.Entries[$DayOfLogging] += 1;
$LogAnalysis.Hour.Entries[$HourOfLogging] += 1;
$LogAnalysis.Minute.Entries[$MinuteOfLogging] += 1;
$LogAnalysis.Day.Count += 1;
$LogAnalysis.Hour.Count += 1;
$LogAnalysis.Minute.Count += 1;
$LogAnalysis.Day.Average = [math]::Ceiling($LogAnalysis.Day.Count / $LogAnalysis.Day.Entries.Count);
$LogAnalysis.Hour.Average = [math]::Ceiling($LogAnalysis.Hour.Count / $LogAnalysis.Hour.Entries.Count);
$LogAnalysis.Minute.Average = [math]::Ceiling($LogAnalysis.Minute.Count / $LogAnalysis.Minute.Entries.Count);
}
foreach ($value in $LogAnalysis.Day.Entries.Values) {
$LogAnalysis.Day.Maximum = Get-IcingaValue -Value $value -Compare $LogAnalysis.Day.Maximum -Maximum;
}
foreach ($value in $LogAnalysis.Hour.Entries.Values) {
$LogAnalysis.Hour.Maximum = Get-IcingaValue -Value $value -Compare $LogAnalysis.Hour.Maximum -Maximum;
}
foreach ($value in $LogAnalysis.Minute.Entries.Values) {
$LogAnalysis.Minute.Maximum = Get-IcingaValue -Value $value -Compare $LogAnalysis.Minute.Maximum -Maximum;
}
Stop-IcingaTimer 'EventLog Analyser';
Write-IcingaConsoleNotice 'Average Logs per Day: {0}' -Objects $LogAnalysis.Day.Average;
Write-IcingaConsoleNotice 'Average Logs per Hour: {0}' -Objects $LogAnalysis.Hour.Average;
Write-IcingaConsoleNotice 'Average Logs per Minute: {0}' -Objects $LogAnalysis.Minute.Average;
Write-IcingaConsoleNotice 'Maximum Logs per Day: {0}' -Objects $LogAnalysis.Day.Maximum;
Write-IcingaConsoleNotice 'Maximum Logs per Hour: {0}' -Objects $LogAnalysis.Hour.Maximum;
Write-IcingaConsoleNotice 'Maximum Logs per Minute: {0}' -Objects $LogAnalysis.Minute.Maximum;
Write-IcingaConsoleNotice 'Analysing Time: {0}s' -Objects ([math]::Round((Get-IcingaTimer 'EventLog Analyser').Elapsed.TotalSeconds, 2));
}