DnsPlugins/Linode.ps1
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function Add-DnsTxtLinode { [CmdletBinding()] param( [Parameter(Mandatory,Position=0)] [string]$RecordName, [Parameter(Mandatory,Position=1)] [string]$TxtValue, [Parameter(Mandatory,Position=2)] [securestring]$LIToken, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) # API Docs # https://developers.linode.com/api/v4 $apiRoot = 'https://api.linode.com/v4' $restParams = @{ Headers = @{ Authorization="Bearer $((New-Object PSCredential "user",$LIToken).GetNetworkCredential().Password)" 'X-Filter' = '{}' } ContentType = 'application/json' } # get the zone name for our record $zoneID,$zoneName = Find-LIZone $RecordName $restParams Write-Debug "Found zone $zoneID for $zoneName" # get all the instances of the record try { $recShort = $RecordName.Replace(".$zoneName",'') $restParams.Headers.'X-Filter' = @{name=$recShort;type='TXT'} | ConvertTo-Json -Compress $recs = (Invoke-RestMethod "$apiRoot/domains/$zoneID/records" @restParams @script:UseBasic).data } catch { throw } finally { $restParams.Headers.'X-Filter' = '{}' } if (-not $recs -or $TxtValue -notin $recs.target) { # add new record try { Write-Verbose "Adding a TXT record for $RecordName with value $TxtValue" $bodyJson = @{name=$recShort;target=$TxtValue;type='TXT';ttl_sec=300} | ConvertTo-Json -Compress Invoke-RestMethod "$apiRoot/domains/$zoneID/records" -Method Post -Body $bodyJson ` @restParams @script:UseBasic | Out-Null } catch { throw } } else { Write-Debug "Record $RecordName already contains $TxtValue. Nothing to do." } <# .SYNOPSIS Add a DNS TXT record to Linode. .DESCRIPTION Add a DNS TXT record to Linode using the v4 API. .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER LIToken A Personal Access Token associated with the Linode account that has Read/Write permissions on Domains. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE $token = Read-Host "Token" -AsSecureString PS C:\>Add-DnsTxtLinode '_acme-challenge.site1.example.com' 'asdfqwer12345678' $token Adds a TXT record for the specified site with the specified value. #> } function Remove-DnsTxtLinode { [CmdletBinding()] param( [Parameter(Mandatory,Position=0)] [string]$RecordName, [Parameter(Mandatory,Position=1)] [string]$TxtValue, [Parameter(Mandatory,Position=2)] [securestring]$LIToken, [Parameter(ValueFromRemainingArguments)] $ExtraParams ) # API Docs # https://developers.linode.com/api/v4 $apiRoot = 'https://api.linode.com/v4' $restParams = @{ Headers = @{ Authorization="Bearer $((New-Object PSCredential "user",$LIToken).GetNetworkCredential().Password)" 'X-Filter' = '{}' } ContentType = 'application/json' } # get the zone name for our record $zoneID,$zoneName = Find-LIZone $RecordName $restParams Write-Debug "Found zone $zoneID for $zoneName" # get all the instances of the record try { $recShort = $RecordName.Replace(".$zoneName",'') $restParams.Headers.'X-Filter' = @{name=$recShort;type='TXT'} | ConvertTo-Json -Compress $recs = (Invoke-RestMethod "$apiRoot/domains/$zoneID/records" @restParams @script:UseBasic).data } catch { throw } finally { $restParams.Headers.'X-Filter' = '{}' } if (-not $recs -or $TxtValue -notin $recs.target) { Write-Debug "Record $RecordName with value $TxtValue doesn't exist. Nothing to do." } else { # delete record try { Write-Verbose "Removing TXT record for $RecordName with value $TxtValue" $recID = ($recs | Where-Object { $_.target -eq $TxtValue }).id Invoke-RestMethod "$apiRoot/domains/$zoneID/records/$recID" -Method Delete ` @restParams @script:UseBasic | Out-Null } catch { throw } } <# .SYNOPSIS Remove a DNS TXT record from Linode. .DESCRIPTION Add a DNS TXT record to Linode using the v4 API. .PARAMETER RecordName The fully qualified name of the TXT record. .PARAMETER TxtValue The value of the TXT record. .PARAMETER LIToken A Personal Access Token associated with the Linode account that has Read/Write permissions on Domains. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. .EXAMPLE $token = Read-Host "Token" -AsSecureString PS C:\>Remove-DnsTxtLinode '_acme-challenge.site1.example.com' 'asdfqwer12345678' $token Removes a TXT record for the specified site with the specified value. #> } function Save-DnsTxtLinode { [CmdletBinding()] param( [Parameter(ValueFromRemainingArguments)] $ExtraParams ) <# .SYNOPSIS Not required. .DESCRIPTION This provider does not require calling this function to commit changes to DNS records. .PARAMETER ExtraParams This parameter can be ignored and is only used to prevent errors when splatting with more parameters than this function supports. #> } ############################ # Helper Functions ############################ function Find-LIZone { [CmdletBinding()] param( [Parameter(Mandatory,Position=0)] [string]$RecordName, [Parameter(Mandatory,Position=1)] [hashtable]$RestParams ) # setup a module variable to cache the record to zone mapping # so it's quicker to find later if (!$script:LIRecordZones) { $script:LIRecordZones = @{} } # check for the record in the cache if ($script:LIRecordZones.ContainsKey($RecordName)) { return $script:LIRecordZones.$RecordName } $apiRoot = 'https://api.linode.com/v4' # Since the provider could be hosting both apex and sub-zones, we need to find the closest/deepest # sub-zone that would hold the record rather than just adding it to the apex. So for something # like _acme-challenge.site1.sub1.sub2.example.com, we'd look for zone matches in the following # order: # - site1.sub1.sub2.example.com # - sub1.sub2.example.com # - sub2.example.com # - example.com $pieces = $RecordName.Split('.') for ($i=1; $i -lt ($pieces.Count-1); $i++) { $zoneTest = "$( $pieces[$i..($pieces.Count-1)] -join '.' )" Write-Debug "Checking $zoneTest" try { $RestParams.Headers.'X-Filter' = "{`"domain`":`"$zoneTest`"}" $response = Invoke-RestMethod "$apiRoot/domains" @RestParams @script:UseBasic if ($response.data.Count -gt 0) { $z = $response.data[0] $script:LIRecordZones.$RecordName = $z.id,$z.domain return $z.id,$z.domain } } catch { throw } finally { $RestParams.Headers.'X-Filter' = '{}' } } return $null } |