SATLogger.psm1
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# Global configuration variables $Global:LogConfig = $null $Global:LogicMonitorConfig = $null function Set-LogConfiguration{ <# .SYNOPSIS Defines a parameter set for the SATLogger. .DESCRIPTION SATLogger enables standardized log messages in JSON, CSV, or Text (Pipe delimited) Messages can be optionally routed to the console and Logic Monitor. .PARAMETER Format [string] The format of the log message string (JSON, CSV, or Text). .PARAMETER JobName [string] The name of the job being logged. This should be a unique descriptive name that can serve as a key for searches. .PARAMETER LogToFile [bool] Boolean to log to a file . .PARAMETER LogFile [string] The full path to the log file, including the file name and extension. .PARAMETER LogToLogicMonitor [bool] Boolean to route log messages to Logic Monitor. .PARAMETER LogicMonitorLogLevel [int] Log threshold to capture in Logic Monitor. All logs below the selected threshold will be suppressed. Accepted levels: 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL. .PARAMETER LogToConsole [bool] Boolean to display log messages in the console. This is required for azure automation jobs. .PARAMETER LogLevel [int] Log threshold to capture. All logs below the selected threshold will be suppressed. Accepted levels: 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL. .PARAMETER RetentionDays [int] Number of days to retain old log files on disk. This is only applicable for SATLogger- managed log files. Not supported with the -Append or -LogFile switches. .PARAMETER Append [bool] Boolean to append to an existing log file. .EXAMPLE Set-LogConfiguration -Format JSON -JobName AddressBookUpdate -LogFile .\AddressBookUpdate.json -LogToLogicMonitor:$true -LogToConsole:$true -LogLevel 2 .EXAMPLE Set-LogConfiguration -JobName InstallHotfix .OUTPUTS None #> param ( [Parameter(HelpMessage="Log message format. Options are 'CSV','JSON', or 'Text.'")] [ValidateSet('CSV','JSON','Text')] [string]$Format = 'Text', [Parameter(HelpMessage="Name of the Job your are logging.", Mandatory=$true)] [string]$JobName, [Parameter(HelpMessage="Set to TRUE if you would like to output to the console. This should be TRUE for all Azure Automation Jobs")] [bool]$LogToConsole = $true, [Parameter(HelpMessage="Set to TRUE to route logs to Logic Monitor.")] [bool]$LogToLogicMonitor = $false, [Parameter(HelpMessage="Log threshold to capture. All logs below the selected threshold will be suppressed, 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL.")] [ValidateSet(0,1,2,3,4)] [int]$LogicMonitorLogLevel = 2, [Parameter(HelpMessage="Indicates if you would like to output to a file. Default is true. Set to False for most Azure automation jobs.")] [bool]$LogToFile = $true, [Parameter(HelpMessage="A full or relative path to the log file, including the file name and extension.'")] [string]$LogFile, [Parameter(HelpMessage="Log threshold to capture. All logs below the selected threshold will be suppressed, 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL.")] [ValidateSet(0,1,2,3,4)] [int]$LogLevel = 1, [Parameter(HelpMessage="Number of days to retain past log files. A value of 0 will retain all logs.")] [int]$RetentionDays = 0, [Parameter(HelpMessage="Append to an existing log file. Default is false.")] [bool]$Append = $false ) # If LogToFile is true, define the log file path. if($LogToFile){ if($LogFile -and ($RetentionDays -gt 0)){ Write-Output "Ambiguous option selected with LogFile path specified: RetentionDays." Write-Output "If you would like to enable log pruning, do not specify the LogFile value." Write-Output "The logger will automatically generate and maintain log files." Write-Output "Setting retention to 0 to disable log pruning." $RetentionDays = 0 } if($Append -and ($RetentionDays -gt 0)){ Write-Output "Ambiguous option selected with log pruning enabled: Append." Write-Output "Log pruning is not supported with the Append option." Write-Output "Setting retention to 0 to disable log pruning." $RetentionDays = 0 } if(!($LogFile) -or $null -eq $LogFile){ $LogDirectory = "$(Split-Path $MyInvocation.PSCommandPath)\Logs" if($Format -eq "Text"){ $Extension = ".txt" } elseif($Format -eq "CSV"){ $Extension = ".csv" } elseif($Format -eq "JSON"){ $Extension = ".json" } # If the append option is selected, use the job name only. # Otherwise, append the date to the log file name. if($Append){ $LogFileName = "$($JobName)$($Extension)" } else{ $LogDate = (Get-Date -Format yyy-MM-dd) $LogFileName = "$($JobName)_$($LogDate)$($Extension)" } $LogFile = "$logDirectory\$LogFileName" } if(-not (Test-Path $LogFile)){ try{ # Create the file if it doesn't exist. New-Item -ItemType File -Path $LogFile -Force -ErrorAction Stop # Write the CSV Header for new log files. if($Format -eq "CSV"){ [PSCustomObject]@{ "DateTime" = $Date "JobName" = $LogConfig.JobName "Severity" = $Type "Message" = $Message "Host" = $LogConfig.Host "Script" = $LogConfig.Script } | Select-Object DateTime,JobName,Severity,Message | Export-Csv $LogFile -NoTypeInformation } } catch{ Write-Output "Unable to create log file. Exception: $($error[0].Exception.Message)" Write-Output "Streaming log to console only." $LogToFile = $false } } # Clean old log files if($RetentionDays -gt 0){ if($LogDirectory -and $Extension){ $LogsToPurge = Get-ChildItem $LogDirectory "*$extension" | Where-Object {$_.CreationTime -lt (Get-Date).AddDays(-$RetentionDays)} foreach($Item in $LogsToPurge){ try{ Remove-Item $Item.FullName -Force -ErrorAction Stop Write-Output "Purged log based on retention policy: $($Item.FullName)" } catch{ Write-Output "Failed to purge log $($Item.FullName). Error: $($error[0].Exception.message)" } } } } } $Global:LogConfig = @{ "Format" = $Format "JobName" = $JobName "LogToFile" = $LogToFile "LogFile" = $LogFile "LogicMonitor" = $LogToLogicMonitor "LogicMonitorLogLevel" = $LogicMonitorLogLevel "LogToConsole" = $LogToConsole "LogLevel" = $LogLevel "Host" = $env:COMPUTERNAME "Script" = $MyInvocation.PSCommandPath } } function New-LogMessage{ <# .SYNOPSIS Writes log messages to one or more output channels. .DESCRIPTION New-LogMessage accepts a message string and a severity indicator to route to one or more output channels in the log configuration. .PARAMETER Severity [int] The severity of the message being logged. Accepted levels: 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL. .PARAMETER Message [string] The message to output. .EXAMPLE New-LogMessage -Severity 4 -Message "AUGGHHHHH!" .OUTPUTS None #> param ( [Parameter(HelpMessage="Severity of the message (0-4), 0=DEBUG, 1=INFO, 2=WARN, 3=ERROR, 4=CRITICAL. Default is 1 (INFO).")] [ValidateSet(0,1,2,3,4)] [int]$Severity = 1, [Parameter(HelpMessage="The string you would like to append to the log.", Mandatory=$true)] [string]$Message ) if(!($Global:LogConfig)){ Write-Output "Log configuration undefined. Define your configuration with 'Set-LogConfiguration' to use this function." Write-Output "Setting a default log configuration." $JobGuid = New-Guid $LogConfig = Set-LogConfiguration -Format Text -JobName $JobGuid -LogFile ".\$($JobGuid).txt" -LogicMonitor:$false -LogToConsole:$true -LogLevel 1 } $Date = get-date -Format "yyyy-MM-dd hh:mm:ss" $Type = $null switch ($Severity) { 0 { $Type = "DEBUG"} 1 { $Type = "INFO" } 2 { $Type = "WARN" } 3 { $Type = "ERROR" } 4 { $Type = "CRITICAL"} default {$Type = "INFO" } } # Only log if the severity is greater than or equal to the severity defined in the config if($Severity -ge $LogConfig.LogLevel){ # Set the log string based on the defined output type if($LogConfig.Format -eq "JSON"){ $LogString = @{ "DateTime" = $Date "JobName" = $LogConfig.JobName "Severity" = $Type "Message" = $Message "Host" = $LogConfig.Host "Script" = $LogConfig.Script } | ConvertTo-Json -Compress -Depth 3 } elseif($LogConfig.Format -eq "CSV"){ $LogString = [PSCustomObject]@{ "DateTime" = $Date "JobName" = $LogConfig.JobName "Severity" = $Type "Message" = $Message "Host" = $LogConfig.Host "Script" = $LogConfig.Script } | Select-Object DateTime,JobName,Severity,Message | ConvertTo-Csv -NoHeader } elseif($LogConfig.Format -eq "Text"){ $LogString = $Date + " | " + $LogConfig.JobName + " | " + $Type + " | " + $Message + " | " + $LogConfig.Host + " | " + $LogConfig.Script } # Console and Stream output: if($LogConfig.LogToConsole){ Write-Output $LogString } # File output if($LogConfig.LogToFile){ $LogString | Out-File $LogConfig.LogFile -Append } # Route message to Logic Monitor if($LogConfig.LogicMonitor){ # Handle when a separate threshold defined for Logic Monitor if($LogConfig.LogicMonitorLogLevel){ if($Severity -ge $LogConfig.LogicMonitorLogLevel){ Write-LogicMonitorLog -LogString $LogString } } else{ Write-LogicMonitorLog -LogString $LogString } } } } function Set-LogicMonitorConfiguration{ <# .SYNOPSIS Defines a parameter set for connecting to Logic Monitor's log ingest API .DESCRIPTION Set-LogicMonitorConfiguration is a function that defines a global hash table which contains the connection parameters for Logic Monitor's ingest API. All parameters are required. .PARAMETER Url [string] The base URL for the Logic Monitor rest API. .PARAMETER ApiKey [string] Logic Monitor API Key. .PARAMETER ApiSecret [string] Logic Monitor API Secret value. .EXAMPLE Set-LogicMonitorConfiguration -ApiKey <API_KEY> -ApiSecret <API_Secret> -Url "https://mycompany.logicmonitor.com/rest" .OUTPUTS None #> param ( [Parameter(HelpMessage="The base URL for the Logic Monitor API.", Mandatory=$true)] [string]$Url, [Parameter(HelpMessage="Logic Monitor API Key.", Mandatory=$true)] [string]$ApiKey, [Parameter(HelpMessage="Logic Monitor API Secret value.", Mandatory=$true)] [string]$ApiSecret ) $Global:LogicMonitorConfig = @{ "BaseURL" = $Url "ApiKey" = $ApiKey "ApiSecret" = $ApiSecret } } function Write-LogicMonitorLog{ param ( [Parameter(HelpMessage="The formatted log string to send to Logic Monitor.", Mandatory=$true)] [string]$LogString ) if(!($Global:LogicMonitorConfig)){ $Global:LogConfig.LogicMonitor = $false New-LogMessage -Severity 2 -Message "Logic Monitor is not configured. Define your configuration with 'Set-LogicMonitorConfiguration' to log to Logic Monitor." New-LogMessage -Severity 1 -Message "Disabled Logic Monitor logging in the log configuration." } $method = "POST" $base_url = $LogicMonitorConfig.BaseURL $path = "/log/ingest" #$request_data = ConvertTo-Json @(@{"msg"=$LogString;"_lm.resourceId"=@{"system.deviceId"=$LogicMonitorConfig.ResourceName}}) -Depth 4 -Compress $request_data = ConvertTo-Json @(@{"msg"=$LogString;"_lm.resourceId"=@{"system.jobName"=$LogConfig.JobName}}) -Depth 4 -Compress $api_key = $LogicMonitorConfig.ApiKey $api_secret = $LogicMonitorConfig.ApiSecret $credential = New-Object pscredential($api_key, (ConvertTo-SecureString $api_secret -AsPlainText -Force)) # Get current time in milliseconds $epoch = [Math]::Round((New-TimeSpan -start (Get-Date -Date "1/1/1970") -end (Get-Date).ToUniversalTime()).TotalMilliseconds) # Concatenate Request Details $request_vars = $method + $epoch + $request_data + $path # Extract credentials $access_id = $credential.GetNetworkCredential().username $access_key = $credential.GetNetworkCredential().password # Construct Signature $hmac = New-Object System.Security.Cryptography.HMACSHA256 $hmac.Key = [Text.Encoding]::UTF8.GetBytes($access_key) $signature_bytes = $hmac.ComputeHash([Text.Encoding]::UTF8.GetBytes($request_vars)) $signature_hex = [System.BitConverter]::ToString($signature_bytes) -replace '-' $signature = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($signature_hex.ToLower())) $auth_key = "LMv1 $access_id`:$signature`:$epoch" $headers = @{ 'Content-Type'='application/json' 'Authorization'=$auth_key } $response = Invoke-RestMethod -Uri "$($base_url)$($path)" -Method $method -Headers $headers -Body $request_data if($response.errmsg){ $Global:LogConfig.LogicMonitor = $false New-LogMessage -Severity 2 -Message "Logic Monitor returned an error: $($response.errmsg)." New-LogMessage -Severity 1 -Message "Disabled Logic Monitor logging in the log configuration." } } #Export-ModuleMember -Function Set-LogicMonitorConfiguration, Set-LogConfiguration, New-LogMessage -Alias setlm, setlog, nlm |