OctopusDSCHelpers.ps1
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# Module contains shared code for OctopusDSC $octopusServerExePath = "$($env:ProgramFiles)\Octopus Deploy\Octopus\Octopus.Server.exe" $tentacleExePath = "$($env:ProgramFiles)\Octopus Deploy\Tentacle\Tentacle.exe" function Get-ODSCParameter($parameters) { # unfortunately $PSBoundParameters doesn't contain parameters that weren't supplied (because the default value was okay) # credit to https://www.briantist.com/how-to/splatting-psboundparameters-default-values-optional-parameters/ $params = @{} foreach ($h in $parameters.GetEnumerator()) { $key = $h.Key $var = Get-Variable -Name $key -ErrorAction SilentlyContinue if ($null -ne $var) { $val = Get-Variable -Name $key -ErrorAction Stop | Select-Object -ExpandProperty Value -ErrorAction Stop $params[$key] = $val } } return $params } function Test-GetODSCParameter { param( $Name, $Ensure, $DefaultValue = 'default' ) return (Get-ODSCParameter $MyInvocation.MyCommand.Parameters) } function Invoke-WebClient($url, $OutFile) { $downloader = new-object System.Net.WebClient $downloader.DownloadFile($url, $OutFile) } function Request-File { [CmdletBinding()] param ( [string]$url, [string]$saveAs ) $retry = $true $retryCount = 0 $maxRetries = 5 $downloadFile = $true [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12, [System.Net.SecurityProtocolType]::Tls11, [System.Net.SecurityProtocolType]::Tls Write-Verbose "Checking to see if we have an installer at $saveas" if(Test-Path $saveAs) { # check if we already have a matching file on disk Write-Verbose "Local file exists" $localHash = Get-FileHash $saveAs -Algorithm SHA256 | Select -Expand hash Write-Verbose "Local SHA256 hash: $localHash" $remoteHash = (Invoke-WebRequest -uri $url -Method Head -UseBasicParsing | select -expand headers).GetEnumerator() | ? { $_.Key -eq "x-amz-meta-sha256" } | select -expand value Write-Verbose "Remote SHA256 hash: $remoteHash" $downloadFile = ($localHash -ne $remoteHash) } else { Write-Verbose "No local installer found" } if($downloadFile) { while ($retry) { Write-Verbose "Downloading $url to $saveAs" try { Invoke-WebClient -Url $url -OutFile $saveAs $retry = $false } catch { Write-Verbose "Failed to download $url" $ex = $_.Exception while($null -ne $ex) { Write-Verbose "Got Exception '$($ex.Message)'." $ex = $ex.InnerException } Write-Verbose "Retrying up to $maxRetries times." if ($retryCount -gt $maxRetries) { # rethrow the inner exception if we've retried enough times throw $_.Exception.InnerException } $retryCount = $retryCount + 1 Start-Sleep -Seconds 1 } } } else { Write-Verbose "Local file and remote file hashes match. We already have the file, skipping download." } } function Invoke-AndAssert { param ($block) & $block | Write-Verbose if ($LASTEXITCODE -ne 0 -and $null -ne $LASTEXITCODE) { throw "Command returned exit code $LASTEXITCODE" } } function Write-Log { param ( [string] $message ) $timestamp = ([System.DateTime]::UTCNow).ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ss") Write-Verbose "[$timestamp] $message" } Function Invoke-WithRetries { [CmdletBinding()] param( [scriptblock]$ScriptBlock, [int]$MaxRetries = 10, [int]$IntervalInMilliseconds = 200 ) $backoff = 1 $retrycount = 0 $returnvalue = $null while ($null -eq $returnvalue -and $retrycount -lt $MaxRetries) { try { $returnvalue = Invoke-Command $ScriptBlock if ($null -ne $LastExitCode -and $LastExitCode -ne 0) { throw "Command exited with exit code $LastExitCode" } } catch { if($error) { Write-Verbose ($error | Select-Object -first 1) } else { Write-Verbose ("Invoke-WithRetries threw an exception: " + ($_| Out-String)) } Write-Verbose "We have tried $retrycount times, sleeping for $($backoff * $IntervalInMilliseconds) milliseconds and trying again." Start-Sleep -MilliSeconds ($backoff * $IntervalInMilliseconds) $backoff = $backoff + $backoff $retrycount++ } } return $returnvalue } function Get-MaskedOutput { [CmdletBinding()] param($arguments) $singleAsterixArgs = "--masterkey|--license|--licence|--trust|--password|--remove-trust|--apikey|--pw|--pfx-password|--proxyPassword"; $connectionStringArgs = "--connectionstring"; # Scrub sensitive values for($x=0; $x -lt $arguments.count; $x++) { if($arguments[$x] -match $singleAsterixArgs) { $arguments[$x+1] = "**********" } elseif($arguments[$x] -match $connectionStringArgs) { $arguments[$x+1] = $arguments[$x+1] -replace "(password|pwd)=[^;|`"]*", "`$1=********" } } return $arguments } function Write-VerboseWithMaskedCommand ($exePath, $cmdArgs) { $copiedarguments = @() # hack to pass a copy of the array, not a reference $copiedarguments += $cmdArgs $maskedarguments = Get-MaskedOutput $copiedarguments Write-Verbose "Executing command '$exePath $($maskedarguments -join ' ')'" } function Invoke-OctopusServerCommand ($cmdArgs) { Write-VerboseWithMaskedCommand $octopusServerExePath $cmdArgs $LASTEXITCODE = 0 $output = & $octopusServerExePath $cmdArgs 2>&1 Write-CommandOutput $output if (($null -ne $LASTEXITCODE) -and ($LASTEXITCODE -ne 0)) { Write-Error "Command returned exit code $LASTEXITCODE. Aborting." throw "Command returned exit code $LASTEXITCODE. Aborting." } Write-Verbose "done." } function Test-TentacleExecutableExists { $tentacleDir = "${env:ProgramFiles}\Octopus Deploy\Tentacle" return ((test-path $tentacleDir) -and (test-path "$tentacleDir\tentacle.exe")) } function Invoke-TentacleCommand ($cmdArgs) { Write-VerboseWithMaskedCommand $tentacleExePath $cmdArgs $LASTEXITCODE = 0 $output = & $tentacleExePath $cmdArgs 2>&1 Write-CommandOutput $output if (($null -ne $LASTEXITCODE) -and ($LASTEXITCODE -ne 0)) { Write-Error "Command returned exit code $LASTEXITCODE. Aborting." throw "Command returned exit code $LASTEXITCODE. Aborting." } Write-Verbose "done." return $output } function Write-CommandOutput { param ( [string] $output ) if ($output -eq "") { return } Write-Verbose "" #this isn't quite working foreach ($line in $output.Trim().Split("`n")) { Write-Verbose $line } Write-Verbose "" } function Get-ServerConfiguration($instanceName) { $rawConfig = & $octopusServerExePath show-configuration --format=json-hierarchical --noconsolelogging --console --instance $instanceName # handle a specific error where an exception in registry migration finds its way into the json-hierarchical output # Refer to Issue #179 (https://github.com/OctopusDeploy/OctopusDSC/issues/179) # wrapped in retries to catch transient issues in json output $config = Invoke-WithRetries { if(Test-ValidJson $rawConfig) { return $rawConfig | ConvertFrom-Json } else { Write-Warning "Invalid json encountered in show-configuration; attempting to clean up." $cleanedUpConfig = Get-CleanedJson $rawConfig if(Test-ValidJson $cleanedUpConfig ) { return $cleanedUpConfig | ConvertFrom-Json } else { throw "Attempted to cleanup bad JSON and failed." } } } -MaxRetries 3 -IntervalInMilliseconds 100 $plainTextMasterKey = & $octopusServerExePath show-master-key --noconsolelogging --console --instance $instanceName $encryptedMasterKey = New-Object SecureString $plainTextMasterKey.ToCharArray() | Foreach-Object { $encryptedMasterKey.AppendChar($_) } $config | Add-Member -NotePropertyName "OctopusMasterKey" -NotePropertyValue (New-Object System.Management.Automation.PSCredential ("ignored", $encryptedMasterKey)) return $config } function Get-TentacleConfiguration($instanceName) { $rawConfig = & $tentacleExePath show-configuration --instance $instanceName $config = $rawConfig | ConvertFrom-Json return $config } function Test-ValidJson { param($string) try { $string | ConvertFrom-Json | Out-Null return $true } catch { return $false } } # Operates on a very specific json output failure. See issue #179 (https://github.com/OctopusDeploy/OctopusDSC/issues/179) function Get-CleanedJson { [CmdletBinding()] param($jsonstring) $jsonstart = $jsonstring.IndexOf("{") Write-Verbose "Found start of JSON at character $jsonstart" $extractedjson = $jsonstring.Substring($jsonstart, $jsonstring.length - $jsonstart) $dumpedstring = $jsonstring.substring(0, $jsonstart) Write-Warning ("stripped extra content from JSON configuration string`r`n`r`n" + (Get-MaskedOutput $dumpedstring)) return $extractedjson } |