functions/Switch-JS7JOCInstance.ps1

function Switch-JS7JOCInstance
{
<#
.SYNOPSIS
Switches the role of the active JS7 JOC Cockpit instance in a cluster
 
.DESCRIPTION
During switch-over the active JOC Cockpit instance switches to the standby and vice versa.
 
The following REST Web Service API resources are used:
 
* /joc/cluster/switch_member
 
.PARAMETER MemberId
Specifies the identification of the standby JOC Cockpit cluster member that should become active.
This information is provided with the Get-JS7JOCInstance cmdlet that returns an array of standby cluster members.
 
.PARAMETER AuditComment
Specifies a free text that indicates the reason for the current intervention, e.g. "business requirement", "maintenance window" etc.
 
The Audit Comment is visible from the Audit Log view of the JOC Cockpit.
This parameter is not mandatory. However, the JOC Cockpit can be configured to require Audit Log comments for all interventions.
 
.PARAMETER AuditTimeSpent
Specifies the duration in minutes that the current intervention required.
 
This information is shown in the Audit Log view. It can be useful when integrated
with a ticket system that logs the time spent on interventions with JS7.
 
.PARAMETER AuditTicketLink
Specifies a URL to a ticket system that keeps track of any interventions performed for JS7.
 
This information is shown in the Audit Log view of JOC Cockpit.
It can be useful when integrated with a ticket system that logs interventions with JS7.
 
.EXAMPLE
Switch-JS7JOCInstance
 
Switches the roles of the active and standby JS7 JOC Cockpit instances:
The active instance switches to standby mode and one of the standby instances becomes active.
 
.EXAMPLE
Switch-JS7JOCInstance -MemberId ( (Get-JS7JOCInstance).Passive | Where-Object -Property 'host' -eq -Value 'joc-2-0-secondary' ).memberId
 
Switches the role of the active JOC Cockpit instance to the indicated cluster member that is currently in standby mode.
As any number of JOC Cockpit standby cluster members can be used, one of them is selected by its hostname.
 
.LINK
about_JS7
 
#>

param
(
    [Parameter(Mandatory=$False,ValueFromPipeline=$False,ValueFromPipelinebyPropertyName=$True)]
    [string] $MemberId,
    [Parameter(Mandatory=$False,ValueFromPipeline=$False,ValueFromPipelinebyPropertyName=$True)]
    [string] $AuditComment,
    [Parameter(Mandatory=$False,ValueFromPipeline=$False,ValueFromPipelinebyPropertyName=$True)]
    [int] $AuditTimeSpent,
    [Parameter(Mandatory=$False,ValueFromPipeline=$False,ValueFromPipelinebyPropertyName=$True)]
    [Uri] $AuditTicketLink
)
    Begin
    {
        Approve-JS7Command $MyInvocation.MyCommand
        $stopWatch = Start-JS7StopWatch

        if ( !$AuditComment -and ( $AuditTimeSpent -or $AuditTicketLink ) )
        {
            throw "$($MyInvocation.MyCommand.Name): Audit Log comment required, use parameter -AuditComment if one of the parameters -AuditTimeSpent or -AuditTicketLink is used"
        }
    }

    Process
    {
        if ( !$MemberId )
        {
            $jocCluster = Get-JS7JOCInstance
            if ( $jocCluster.passive.count -gt 0 )
            {
                $MemberId = $jocCluster.passive[0].memberId
            }
        }

        $body = New-Object PSObject
        Add-Member -Membertype NoteProperty -Name 'memberId' -value $MemberId -InputObject $body

        if ( $AuditComment -or $AuditTimeSpent -or $AuditTicketLink )
        {
            $objAuditLog = New-Object PSObject
            Add-Member -Membertype NoteProperty -Name 'comment' -value $AuditComment -InputObject $objAuditLog

            if ( $AuditTimeSpent )
            {
                Add-Member -Membertype NoteProperty -Name 'timeSpent' -value $AuditTimeSpent -InputObject $objAuditLog
            }

            if ( $AuditTicketLink )
            {
                Add-Member -Membertype NoteProperty -Name 'ticketLink' -value $AuditTicketLink -InputObject $objAuditLog
            }

            Add-Member -Membertype NoteProperty -Name 'auditLog' -value $objAuditLog -InputObject $body
        }

        [string] $requestBody = $body | ConvertTo-Json -Depth 100
        $response = Invoke-JS7WebRequest -Path '/joc/cluster/switch_member' -Body $requestBody

        if ( $response.StatusCode -eq 200 )
        {
            $requestResult = ( $response.Content | ConvertFrom-JSON )

            if ( !$requestResult.ok )
            {
                throw ( $response | Format-List -Force | Out-String )
            }
        } else {
            throw ( $response | Format-List -Force | Out-String )
        }
    }

    End
    {
        Trace-JS7StopWatch -CommandName $MyInvocation.MyCommand.Name -StopWatch $stopWatch
        Update-JS7Session
    }
}