Gets the list of certificates (cert-manager) that are scheduled to renew in the next X days

kubectl-help.ps1

function k8s-certificates-renew{
    param([Parameter()][int]$days = 15)
    ((kubectl get certificates -A -o json | ConvertFrom-Json).items) | 
    ?{[Datetime]($_.status.renewalTime) -lt (Get-Date).AddDays($days) }|
    %{ [pscustomobject]@{Name=$_.metadata.name; RenewAt=[DateTime]$_.status.renewalTime; Namespace=$_.metadata. Namespace } }
    }
    
    
    function k8s-Select-Resources {
    ###Essa função é responsável por extrair as informações 
    ###dos recursos dedicados aos deployments

    param([Parameter(ValueFromPipeline = $true)]$deployListJson)  
    process {
        function ExtractCpuNumber{
            param($cpu)
            if (($cpu -match '[0-9]+m') -eq $False)
                {return ([int]$cpu * 1000);}
            else 
                {return [int]($cpu -replace '[a-z]');}
        }
       
        return ($deployListJson.items | Foreach-object{             
            $containers = $_.spec.template.spec.containers ?? $_.spec.containers; 
            $deployName = $_.metadata.name;
            $deployNamespace =  $_.metadata.Namespace; 
            return ($containers|Foreach-object{
                $resources = $_.resources;
                $container = $_;
                [pscustomobject]@{
                    Name          = $deployName ;
                    ContainerName = ($_.name);
                    Namespace     =  $deployNamespace; 
                    MemoryMin     = ($resources.requests.memory); 
                    CPUMin        = ExtractCpuNumber $resources.requests.cpu; 
                    MemoryMax     = ($resources.limits.memory); 
                    CPUMax        = (ExtractCpuNumber  $resources.limits.cpu); 
                    Image         = ($container.image);                     
                }
            });            

            } ) | Sort-Object -Property CPUMin -Desc
        }
    }
    
    function k8s-deploy-resources {
        param([Parameter()][string]$namespace = 'production')
    (kubectl get deployments -n $namespace --output json | ConvertFrom-Json) | k8s-Select-Resources
    }