Delete all log group leaving specific AWS cloudwatch log groups

delete_all_leaving_specific_log_group.ps1

# Replace the AWS cloudwatch log group name
$log_group_name_to_search = "/aws/lambda/"

# Replace the name of log group or groups which should NOT be DELETED 
$log_group_name_not_to_delete = "/aws/lambda/DEV*"

# The below command gets all the log group name matching $log_group_name_to_search. Then display the output is passed script where 
# if the log groupname matches $log_group_name_not_to_delete then it is not deleted otherwise deleted.

aws logs describe-log-groups --log-group-name-prefix $log_group_name_to_search --query logGroups --output json | ConvertFrom-json |
  ForEach-Object {$_.logGroupName} | ForEach-Object {
   if ($_ -like $log_group_name_not_to_delete) {write-host $_ " :NOT Deleted"}` else {Write-Host $_ " : Deleted"
   aws logs delete-log-group --log-group-name $_ }}