Due to a bit of weirdness with about 75 of our Read only Domain controller servers which had been configured with DHCP\u00a0we needed to routinely perform a flush of the local DNS cache for them to keep replicating and allowing local authentication from clients.<\/p>\n
So instead of performing this manually as we had been doing for about 2 weeks on an as needed basis, I created the following script to create a scheduled task to perform this every day at 9am.<\/p>\n
This could be used to schedule any type of scheduled task.<\/p>\n
[cc lang=”powershell”]<\/p>\n
##############################################################################
\n#
\n# Powershell script to create a Scheduled Task that will register DNS on
\n# local site servers.
\n#
\n##############################################################################<\/p>\n
$ScriptPath = Split-Path $MyInvocation.InvocationName
\n$servers = GC $ScriptPath\\servers.txt
\n$onlinelist = @()
\n$offlinelist = @()
\n$MaxThreads = 10
\n$SleepTimer = 500<\/p>\n
ForEach($server in $servers){
\nStart-Job -ScriptBlock {
\nif(Test-Connection -ComputerName $server -Quiet -Count 2)
\n{
\nWrite-Verbose -Message “`t$server is up”
\n$onlinelist += $server
\n}
\nelse
\n{
\nWrite-Warning -Message “`t$server is not contactable”
\n$offlinelist += $server
\n}
\n}
\n}<\/p>\n
#Wait for all jobs
\nGet-Job | Wait-Job
\n#Get all job results
\nGet-Job | Receive-Job | Out-GridView<\/p>\n
ForEach ($computer in $onlinelist){
\n$action = New-ScheduledTaskAction -Execute ‘powershell.exe’ `
\n-Argument ‘-NoProfile -WindowStyle Hidden -command “& {ipconfig \/registerdns}”‘
\n$trigger =\u00a0 New-ScheduledTaskTrigger -Daily -At 9am<\/p>\n
Register-ScheduledTask -Action $action -Trigger $trigger -TaskName “AppLog” -Description “Daily dump of Applog”<\/p>\n
}<\/p>\n
[\/cc]<\/p>\n","protected":false},"excerpt":{"rendered":"
Due to a bit of weirdness with about 75 of our Read only Domain controller…<\/p>\n","protected":false},"author":1,"featured_media":988,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[19,11],"tags":[27,30,31,73],"class_list":["post-881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-powershell","category-scripts","tag-dhcp","tag-dns","tag-domain-controller","tag-scheduled-task"],"jetpack_featured_media_url":"https:\/\/ihni.uk\/wp-content\/uploads\/2020\/02\/Powershell.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/posts\/881","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ihni.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=881"}],"version-history":[{"count":0,"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/posts\/881\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ihni.uk\/index.php?rest_route=\/wp\/v2\/media\/988"}],"wp:attachment":[{"href":"https:\/\/ihni.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=881"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ihni.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=881"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ihni.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=881"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}