I'm writing a powershell to exact the ip from a server name, which need me to embed the nslookup code into my powershell
how can I do the intergrating work?
Can any body help me?
Add-PSSnapin Microsoft.SharePoint.PowerShell
$web = Get-SPWeb -Identity “http://nycs00058260/sites/usitp“
$server_status = "PROD"
$list=$web.Lists[”DNS_Status”]
$items = $list.items
Foreach($item in $items){
$item_name = $item["Server_name"] #need to get the ip by this name
/*nslook up*/
$item_name.update()
}
If you install the PSCX module, it comes with a cmdlet Resolve-Host which handles name lookups.
Absent that, this one-liner will do the job
[System.Net.Dns]::GetHostAddresses("www.msn.com")
You can also pass in an IP address - but the results will be different.
See also http://blogs.msdn.com/b/powershell/archive/2006/06/26/647318.aspx & http://powershell.com/cs/media/p/210.aspx
PowerShell 3.0 on Windows 8 and higher comes with a Resolve-DnsName cmdlet that will get this information:
(Resolve-DnsName $server_name)[0].IpAddress
Simply use :
Resolve-DnsName monServer | ? { # make selection here } | % { $_.IPAdress } | select-object -first 1
#Here is a far better method for nslookup
# HOWTO ensure an nslookup results no errors but still gives the original names and column separations
$day = Get-Date -Format yyyyMMdd #<-- HOWTO set the day variable for today
$ErrorActionPreference = ‘SilentlyContinue’ #<-- HOWTO turn off error messages
$WarningActionPreference = 'SilentlyContinue' #<-- HOWTO turn off warning messages
$servers = Get-Content .\input\servers.txt
Foreach ($server in $servers){
$result = Resolve-DnsName $server -Server $env:LOGONSERVER.Remove(0,2) -Type ALL #<-- NSLOOKUP using your logon server
write-host ($server+","+$result.Name+","+$result.IPAddress) #<-- HOWTO Write two variables separated by a comma
}
$ErrorActionPreference = ‘SilentlyContinue’ #HOWTO turn on error messages
$WarningActionPreference = 'SilentlyContinue' #HOWTO turn on warning messages
Related
I'm writing a powershell script to ping all the servers and check which are offline. but i have a bug. By name it works perfectly. But when i do test-connection with an IP it seems to work BUT i cant output the name of the IP in the hashlist. Could someone help me figure this out? Thanks!!
System.Collections.Hashtable.keys Is online/available, This is what it outputs. But i want it to say "Servername is online/available"
#Creating IP Array list
$ip_array = #{
Server = [ipaddress] "192.168.1.1"
sws = [ipaddress] "192.168.1.1"
}
Foreach ($ip in $ip_array)
{
if((Test-Connection -IPAddress $ip.values.ipaddresstostring -quiet -count 1 ) -eq $false)
{
write-output("$ip.keys Is offline/unavailable, please troubleshoot connection, script is terminating") | Red
}
else
{
$ping = $true
write-output("$ip.keys Is online/available") | Green
}
}
PowerShell's default pipeline semantics (any collection that can be enumerated and unraveled will be) makes dictionaries a pain to work with - piping them anywhere would result in a list of disjoint key-value-pairs, dictionary itself lost.
For this reason, PowerShell refuses to automatically enumerate dictionaries, and you must manually obtain an enumerator in order to loop over the entries in it:
foreach($entry in $ip_hash.GetEnumerator()){
# reference `$entry.Key` or `$entry.Name` for the key (eg. Server)
# reference `$entry.Value` for the value (eg. 192.168.1.1)
}
If you really intend to use a Hashtable for this, combining IP addresses with computernames, change to something like this:
# creating IP Hashtable
$ip_hash = #{
'192.168.1.1' = 'Server1'
'192.168.1.2' = 'Server2'
# etcetera
}
# loop through the hash, key-by-key
foreach ($ip in $ip_hash.Keys) {
$ping = Test-Connection -ComputerName $ip -Quiet -Count 1 -ErrorAction SilentlyContinue
if(!$ping) {
Write-Host "Server $($ip_hash[$ip]) is offline/unavailable, please troubleshoot connection, script is terminating" -ForegroundColor Red
}
else {
Write-Host "Server $($ip_hash[$ip]) is online/available" -ForegroundColor Green
}
}
Output would look like:
The Keys in the hash must all have unique values
I'd like to use a kinda analyzer which will install/import all the needed modules by the script before I run it on distant machine (which could not have it) ......
any idea ?
EDIT
Here's the case :
I'm on my dev machine, I'ved already installed lots of modules of all kind (dhcp, ntfs, remoting, register, etc.)
When I finally got my script (which is a function) to work, I can't be sure of what modules are used....
What I want is to write down, in the 'begin' section, the correct imports before I send my script on remote PCs; to be sure it's gonna run perfectly, you follow ?...
Is there a kinda a third party appplication which can scan my script and give me all needed modules ?
You could do something like this to get help in finding commands used and their source/module names. It's very unpolished, just trying to give the idea.
$scriptblock = {
Write-Host "Nothing here"
$files = Get-ChildItem c:\temp
Get-ADUser someuser
Test-NetConnection www.google.com
}
# Uncomment following lines and enter the path to your script file
# $scriptFile = "Path\to\some\scriptfile"
# $scriptblock = [scriptblock]::Create((Get-Content -raw -Path $scriptFile))
$ast = $scriptblock.Ast
$commands = $ast.FindAll( { $args[0] -is [System.Management.Automation.Language.CommandAst] }, $true)
$commandText = foreach ($command in $commands) {
$command.CommandElements[0].Extent.Text
}
$commandText |
Select-Object -Unique |
Sort-Object |
Select-Object #{
Label = "CommandName"
Expression = { $_ }
},
#{
Label = "Source"
Expression = {
(Get-Command $_).Source
}
}
Output
CommandName Source
----------- ------
Get-ADUser ActiveDirectory
Get-ChildItem Microsoft.PowerShell.Management
Test-NetConnection NetTCPIP
Write-Host Microsoft.PowerShell.Utility
Yeah, you could for example test if the module exists on that particular machine by trying to import it as follows
Try {
Import-Module dbaclone -ErrorAction stop
#ErrorAction required as failing to import is not a terminating action
} Catch {
Write-Verbose -Verbose "Failed to find dbaclone module - installing"
Install-Module dbaclone -AllowClobber -Force
Write-Verbose -Verbose "Installed!"
Import-Module dbaclone
}
I've built this small block of code to query and store the values of a group of servers, which seems to work fine, however I'd like to know if there is a "pure PowerShell" way to do this.
$eServers = Get-ExchangeServer
$Servers = $eServers | ?{$_.Name -like "Delimit_server_group"}
foreach ($server in $Servers)
{
[string]$Key1 = "\\$server\HKLM\SYSTEM\CurrentControlSet\Control\"
[string]$rKeys += (REG QUERY "$key1" /s)
}
You can use the RegistryKey class to open a remote registry:
$RemoteHKLM = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine',$server)
$RemoteKey = $RemoteHKLM.OpenSubKey('SYSTEM\CurrentControlSet\Control')
# Following will return all subkey names
$RemoteKey.GetSubKeyNames()
You'll have to implement recursive traversal yourself if you need functionality equivalent to reg query /s
Matthias' answer is probably your best option, but there are other approaches you could take as well. If you have PSRemoting enabled on your systems, you could for instance invoke remote commands like this:
$key = 'HKLM:\SYSTEM\CurrentControlSet\Control'
Invoke-Command -Computer $Servers -ScriptBlock {
Get-ChildItem $args[0] | Select-Object -Expand Name
} -ArgumentList $key
I am trying to search several servers to see if a specific Registry key exists.
It looks like the code below is working, but as I start to add the final part of the key, it stops "finding" stuff. I can start to add a*, then ab* as the last key, but as soon as I get to the third character or even the full string that I know is there, it comes back False saying it did not find it.
$servers = Get-Content c:\input.txt | `
Select-Object #{l='ComputerName';e={$_}},#{l='KeyExist';e={Test-Path "HKLM:\System\CurrentControlSet\services\*abcdefg*" }}
$servers | Format-Table -AutoSize
Your problem is that you run Test-Path against the local computer for each remote server name. Unfortunately Test-Path doesn't support querying remote registries.
You could use WMI:
$RegProv = [wmiclass]"\\$servername\root\default:StdRegProv"
if($RegProv.EnumKey(2147483650,"System\CurrentControlSet\services").sNames -like 'abc*'){
# key starting with abc exists
}
Wrap it in your calculated property like this:
#{Name='KeyExists';Expression={[bool](([wmiclass]"\\$_\root\default:StdRegProv").EnumKey(2147483650,"System\CurrentControlSet\services").sNames -like 'abc*')}}
You can check the remote registry like this :
So for each server it will get the registry value and it will store the value in the arraylist and will display the final result.
Presently in your code, you are basically checking locally only.
#####Get Registry Value ####
$main = "LocalMachine"
$path= "registry key path"
$servers = Get-Content c:\input.txt #-- Get all the servers
$arr=New-Object System.Collections.ArrayList
foreach ($Server in $servers)
{
$reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey($main, $Server)
$regKey= $reg.OpenSubKey($path)
$Value = $regkey.GetValue($key)
$arr.Add($Value)
}
$arr
Note: Change the placeholders accordingly
I am writing a PowerCLI script to automate the creation of VMs based on the data within a CSV file and I would like to know how to format an IF statement to check if the VLANs specified already exist to avoid cluttering up the screen with errors.
The section of the script dealing with the VLAN creation in its current format:
New-VM -Name $_.Name -VMHost ($esx | Get-Random) -NumCPU $_.NumCPU -Location $Folder
$list = Get-Cluster $_.Cluster | Get-VMHost
foreach ($esxhost in $list)
{ Get-VirtualSwitch -Name $switch -VMHost $esxhost |
New-VirtualPortgroup -Name "VLAN $($_.VLAN)" -VLANID $($_.VLAN)
}
Write-Host "Wait - propagating VLAN $($_.VLAN) to all hosts" -foreground yellow
Start-Sleep 10
I would like to determine a way to have the script do something like:
IF $_.VLAN exists
Write-host "$_.VLAN already present, proceeding to next step"
ELSE DO{ Get-VirtualSwitch -Name $switch -VMHost $esxhost |
New-VirtualPortgroup -Name "VLAN $($_.VLAN)" -VLANID $($_.VLAN)
}
I don't have much experience in writing these so I was hoping for some assistance on how to
Check whether the VLAN already exists in vSphere on the switch
How to format the IF/ELSE statement properly to avoid cluttering up the PowerCLI window with errors when the script is run
Thank you for any assistance you may provide
EDIT to work for vlan rather than vswitch
You could use get-virtualportgroup for this and check if the names returned contain your vlanid. This won't work for distributed switches as that's a different set of cmdlets.
$host = 'YourHost'
$vlanid = 'YourVlanId'
if ((Get-VirtualPortGroup -host $host).VLanId -contains $vlanid )
{
Write-Output 'vlan present'
}
else
{
Write-Output 'vlan missing'
#your code to create vlan here
}