checks/HADR.Tests.ps1

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$filename = $MyInvocation.MyCommand.Name.Replace(".Tests.ps1", "")

# Get all the info in the function
function Get-ClusterObject {
    [CmdletBinding()]
    param (
        [string]$ClusterVM
    )
    
    [pscustomobject]$return = @{}
    # Don't think you can use the cluster name here it won't run remotely
    $return.Cluster = (Get-Cluster -Name $clustervm)
    $return.Nodes = (Get-ClusterNode -Cluster $clustervm)
    $return.Resources = (Get-ClusterResource -Cluster $clustervm)
    $return.Network = (Get-ClusterNetwork -Cluster $clustervm)
    $return.Groups = (Get-ClusterGroup -Cluster $clustervm)
    $return.AGs = $return.Resources.Where{ $psitem.ResourceType -eq 'SQL Server Availability Group' }
    $return.AvailabilityGroups = @{}
    #Add all the AGs
    foreach ($Ag in $return.AGs) {

        $return.AvailabilityGroups[$AG.Name] = Get-DbaAvailabilityGroup -SqlInstance $Ag.OwnerNode.Name -AvailabilityGroup $AG.Name
    }
    Return $return
}

# Import module or bomb out

# needs the failover cluster module
if (-not (Get-Module FailoverClusters)) {
    try {
        Import-Module FailoverClusters -ErrorAction Stop
    }
    catch {
        Stop-PSFFunction -Message "FailoverClusters module could not load - Please install the Failover Cluster module using Windows Features " -ErrorRecord $psitem
        return
    }
}

# Grab some values
$clusters = Get-DbcConfigValue app.cluster
$skiplistener = Get-DbcConfigValue skip.hadr.listener.pingcheck
$domainname = Get-DbcConfigValue domain.name
$tcpport = Get-DbcConfigValue policy.hadr.tcpport

#Check for Cluster config value
if ($clusters.Count -eq 0) {
    Write-Warning "No Clusters to look at. Please use Set-DbcConfig -Name app.clusters to add clusters for checking"
    break
}
    
foreach ($clustervm in $clusters) {
    # pick the name here for the output - we cant use it as we are accessing remotely
    $clustername = (Get-Cluster -Name $clustervm).Name
    Describe "Cluster $clustername Health using Node $clustervm" -Tags ClusterHealth, $filename {
        $return = Get-ClusterObject -Clustervm $clustervm
    
        Context "Cluster nodes for $clustername" {
            $return.Nodes.ForEach{
                It "Node $($psitem.Name) should be up" {
                    $psitem.State | Should -Be 'Up' -Because 'Every node in the cluster should be available'
                }
            }
        }
        Context "Cluster resources for $clustername" {
            # Get the resources that are no IP Addresses with an owner of Availability Group
            $return.Resources.Where{$_.ResourceType -notin ($_.ResourceType -eq  'IP Address' -and $_.OwnerGroup -in $Return.Ags)}.ForEach{
                It "Resource $($psitem.Name) should be online" {
                    $psitem.State | Should -Be 'Online' -Because 'All of the cluster resources should be online'
                }
            }
            # Get teh resources where IP Address is owned by AG and group by AG
            ($return.Resources.Where{$_.ResourceType -eq 'IP Address'-and $_.OwnerGroup -in $return.AGs} | Group-Object -Property OwnerGroup).ForEach{
                It "One of the IP Addresses for Availability Group $($Psitem.Name) Should be online" {
                    $psitem.Group.Where{$_.State -eq 'Online'}.Count | Should -Be 1 -Because "There should be one IP Address online for Availability Group $($PSItem.Name)"
                }
            }
        }
        Context "Cluster networks for $clustername" {
            $return.Network.ForEach{
                It "$($psitem.Name) should be up" {
                    $psitem.State | Should -Be 'Up' -Because 'All of the CLuster Networks should be up'
                }
            }
        }
        
        Context "HADR status for $clustername" {
            $return.Nodes.ForEach{
                It "HADR should be enabled on the node $($psitem.Name)" {
                    (Get-DbaAgHadr -SqlInstance $psitem.Name).IsHadrEnabled | Should -BeTrue -Because 'All of the nodes should have HADR enabled'
                }
            }
        }
        $Ags = $return.AGs.Name
        foreach ($Name in $Ags) {
            $Ag = $return.AvailabilityGroups[$Name]
            
            Context "Cluster Connectivity for Availability Group $($AG.Name) on $clustername" {
                $AG.AvailabilityGroupListeners.ForEach{
                    $results = Test-DbaConnection -sqlinstance $_.Name
                    It "Listener $($results.SqlInstance) should be pingable" -skip:$skiplistener {
                        $results.IsPingable | Should -BeTrue -Because 'The listeners should be pingable'
                    }
                    It "Listener $($results.SqlInstance) should be able to connect with SQL" {
                        $results.ConnectSuccess | Should -BeTrue -Because 'The listener should process SQL commands successfully'
                    }
                    It "Listener $($results.SqlInstance) domain name should be $domainname" {
                        $results.DomainName | Should -Be $domainname -Because "$domainname is what we expect the domain name to be"
                    }
                    It "Listener $($results.SqlInstance) TCP port should be in $tcpport" {
                        $results.TCPPort | Should -BeIn $tcpport -Because "We expect the TCP Port to be in $tcpport"
                    }
                }

                $AG.AvailabilityReplicas.ForEach{
                    $results = Test-DbaConnection -sqlinstance $PsItem.Name
                    It "Replica $($results.SqlInstance) Should Be Pingable" {
                        $results.IsPingable | Should -BeTrue -Because 'Each replica should be pingable'
                    }
                    It "Replica $($results.SqlInstance) should be able to connect with SQL" {
                        $results.ConnectSuccess | Should -BeTrue -Because 'Each replica should be able to process SQL commands'
                    }
                    It "Replica $($results.SqlInstance) domain name should be $domainname" {
                        $results.DomainName | Should -Be $domainname -Because "$domainname is what we expect the domain name to be"
                    }
                    It "Replica $($results.SqlInstance) TCP port should be in $tcpport" {
                        $results.TCPPort | Should -BeIn $tcpport -Because "We expect the TCP Port to be in $tcpport"
                    }
                }
            }

            Context "Availability group status for $($AG.Name) on $clustername" {
                $AG.AvailabilityReplicas.ForEach{
                    It "$($psitem.Name) replica should not be in unknown availability mode" {
                        $psitem.AvailabilityMode | Should -Not -Be 'Unknown' -Because 'The replica should not be in unknown state'
                    }
                }
                $AG.AvailabilityReplicas.Where{ $psitem.AvailabilityMode -eq 'SynchronousCommit' }.ForEach{
                    It "$($psitem.Name) replica should be synchronised" {
                        $psitem.RollupSynchronizationState | Should -Be 'Synchronized' -Because 'The synchronous replica should be synchronised'
                    }
                }
                $AG.AvailabilityReplicas.Where{ $psitem.AvailabilityMode -eq 'ASynchronousCommit' }.ForEach{
                    It "$($psitem.Name) replica should be synchronising" {
                        $psitem.RollupSynchronizationState | Should -Be 'Synchronizing' -Because 'The asynchronous replica should be synchronizing '
                    }
                }
                $AG.AvailabilityReplicas.Where.ForEach{
                    It"$($psitem.Name) replica should be connected" {
                        $psitem.ConnectionState | Should -Be 'Connected' -Because 'The replica should be connected'
                    }
                }
            
            }
        
            Context "Database availability group status for $($AG.Name) on $clustername" {
                $ag.AvailabilityReplicas.Where{$_.AvailabilityMode -eq 'SynchronousCommit' }.ForEach{
                    (Get-DbaAgDatabase -SqlInstance $psitem.Name -AvailabilityGroup $Ag.Name).ForEach{
                        It "Database $($psitem.DatabaseName) should be synchronised on the replica $($psitem.Replica)" {
                            $psitem.SynchronizationState | Should -Be 'Synchronized'  -Because 'The database on the synchronous replica should be synchronised'
                        }
                        It "Database $($psitem.DatabaseName) should be failover ready on the replica $($psitem.Replica)" {
                            $psitem.IsFailoverReady | Should -BeTrue -Because 'The database on the synchronous replica should be ready to failover'
                        }
                        It "Database $($psitem.DatabaseName) should be joined on the replica $($psitem.Replica)" {
                            $psitem.IsJoined | Should -BeTrue -Because 'The database on the synchronous replica should be joined to the availability group'
                        }
                        It "Database $($psitem.DatabaseName) should not be suspended on the replica $($psitem.Replica)" {
                            $psitem.IsSuspended | Should -Be  $False -Because 'The database on the synchronous replica should not be suspended'
                        }
                    }
                }
                $ag.AvailabilityReplicas.Where{$_.AvailabilityMode -eq 'AsynchronousCommit' }.ForEach{
                    (Get-DbaAgDatabase -SqlInstance $PSItem.Name -AvailabilityGroup $Ag.Name).ForEach{
                        It "Database $($psitem.DatabaseName) should be synchronising on the secondary as it is Async" {
                            $psitem.SynchronizationState | Should -Be 'Synchronizing' -Because 'The database on the asynchronous secondary replica should be synchronising'
                        }
                        It "Database $($psitem.DatabaseName) should not be failover ready on the secondary replica $($psitem.Replica)" {
                            $psitem.IsFailoverReady | Should -BeFalse -Because 'The database on the asynchronous secondary replica should be ready to failover'
                        }
                        It "Database $($psitem.DatabaseName) should be joined on the secondary replica $($psitem.Replica)" {
                            $psitem.IsJoined | Should -BeTrue -Because 'The database on the asynchronous secondary replica should be joined to the availaility group'
                        }
                        It "Database $($psitem.DatabaseName) should not be suspended on the secondary replica $($psitem.Replica)" {
                            $psitem.IsSuspended | Should -Be  $False -Because 'The database on the asynchronous secondary replica should not be suspended'
                        }
                    }
                }
            } 
        }
        $return.Nodes.ForEach{
            Context "Always On extended event status for replica $($psitem.Name) on $clustername" {
                $Xevents = Get-DbaXEsession -SqlInstance $psitem.Name
                It "Replica $($psitem.Name) should have an extended event session called AlwaysOn_health" {
                    $Xevents.Name  | Should -Contain 'AlwaysOn_health' -Because 'The extended events session should exist'
                }
                It "Replica $($psitem.Name) Always On Health extended event session should be running" {
                    $Xevents.Where{ $_.Name -eq 'AlwaysOn_health' }.Status | Should -Be 'Running' -Because 'The extended event session will enable you to troubleshoot errors'
                }
                It "Replica $($psitem.Name) Always On Health extended event session should be set to auto start" {
                    $Xevents.Where{ $_.Name -eq 'AlwaysOn_health' }.AutoStart | Should -BeTrue  -Because 'The extended event session will enable you to troubleshoot errors'
                }
            }
        }
    }
}

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