SPDistributedCacheService

SPDistributedCacheService

Parameters

Parameter	Attribute	DataType	Description	Allowed Values
Name	Key	String	A name to assign to this resource - not really used. For example - AppFabricCachingService
Ensure	Write	String	Present to ensure the current server should be running distributed cache, absent to ensure that it isn't running	Present, Absent
CacheSizeInMB	Required	UInt32	How many MB should be used for the cache. The maximum supported is 16384
ServiceAccount	Required	String	The name of the service account to run the service as. This should already be registered as a managed account in SharePoint
ServerProvisionOrder	Write	StringArray[]	A list of servers which specifies the order they should provision the cache in to ensure that two servers do not do it at the same time
CreateFirewallRules	Required	Boolean	Should the Windows Firewall rules for distributed cache be created?

Description

Type: Specific Requires CredSSP: No

This resource is responsible for provisioning the distributed cache to the service it runs on. This is required in your farm on at least one server (as the behavior of SPFarm is to not enroll every server as a cache server). The service will be provisioned or de-provisioned based on the Ensure property, and when provisioned the CacheSizeInMB property and ServiceAccount property will be used to configure it. The property createFirewallRules is used to determine if exceptions should be added to the windows firewall to allow communication between servers on the appropriate ports.

The ServerProvisionOrder optional property is used when a pull server is handing out configurations to nodes in order to tell this resource about a specific order of enabling the caches. This allows for multiple servers to receive the same configuration, but they will always check for the server before them in the list first to ensure that it is running distributed cache. By doing this you can ensure that you do not create conflicts with two or more servers provisioning a cache at the same time. Note, this approach only makes a server check the others for distributed cache, it does not provision the cache automatically on all servers. If a previous server in the sequence does not appear to be running distributed cache after 30 minutes, the local server that was waiting will begin anyway. The expected values for ServerProvisionOrder are the hostnames $env:COMPUTERNAME of the servers.

The default value for the Ensure parameter is Present. When not specifying this parameter, the distributed cache is provisioned.

Examples

Example 1

This example applies the distributed cache service to the current server, also setting the rules in Windows firewall to allow communication with other cache hosts.

Configuration Example
{
    param
    (
        [Parameter(Mandatory = $true)]
        [PSCredential]
        $SetupAccount
    )

    Import-DscResource -ModuleName SharePointDsc

    node localhost
    {
        SPDistributedCacheService EnableDistributedCache
        {
            Name                 = "AppFabricCachingService"
            CacheSizeInMB        = 8192
            ServiceAccount       = "DEMO\ServiceAccount"
            CreateFirewallRules  = $true
            PsDscRunAsCredential = $SetupAccount
        }
    }
}

Example 2

This example applies the distributed cache service to the current server, but will not apply the rules to allow it to communicate with other cache hosts to the Windows Firewall. Use this approach if you have an alternate firewall solution.

Configuration Example
{
    param
    (
        [Parameter(Mandatory = $true)]
        [PSCredential]
        $SetupAccount
    )

    Import-DscResource -ModuleName SharePointDsc

    node localhost
    {
        SPDistributedCacheService EnableDistributedCache
        {
            Name                 = "AppFabricCachingService"
            CacheSizeInMB        = 8192
            ServiceAccount       = "DEMO\ServiceAccount"
            CreateFirewallRules  = $false
            PsDscRunAsCredential = $SetupAccount
        }
    }
}

Example 3

This example applies the distributed cache service to both "server1" and "server2". The ServerProvisionOrder will ensure that it applies it to server1 first and then server2, making sure they don't both attempt to create the cache at the same time, resuling in errors. A third server "server3", which is not included within ServerProvisionOrder, is configured as Absent.

Note: Do not allow plain text passwords in production environments.

$ConfigurationData = @{
    AllNodes = @(
        @{
            NodeName                    = 'Server1'
            PSDscAllowPlainTextPassword = $true
        },
        @{
            NodeName                    = 'Server2'
            PSDscAllowPlainTextPassword = $true
        },
        @{
            NodeName                    = 'Server3'
            PSDscAllowPlainTextPassword = $true
        }
    )
}

Configuration Example
{
    param
    (
        [Parameter(Mandatory = $true)]
        [PSCredential]
        $SetupAccount
    )

    Import-DscResource -ModuleName SharePointDsc

    node "Server1"
    {
        SPDistributedCacheService EnableDistributedCache
        {
            Name                 = "AppFabricCachingService"
            CacheSizeInMB        = 8192
            ServiceAccount       = "DEMO\ServiceAccount"
            ServerProvisionOrder = @("Server1", "Server2")
            CreateFirewallRules  = $true
            PsDscRunAsCredential = $SetupAccount
        }
    }

    node "Server2"
    {
        SPDistributedCacheService EnableDistributedCache
        {
            Name                 = "AppFabricCachingService"
            CacheSizeInMB        = 8192
            ServiceAccount       = "DEMO\ServiceAccount"
            ServerProvisionOrder = @("Server1", "Server2")
            CreateFirewallRules  = $true
            PsDscRunAsCredential = $SetupAccount
        }
    }

    node "Server3"
    {
        SPDistributedCacheService EnableDistributedCache
        {
            Name                 = "AppFabricCachingService"
            CacheSizeInMB        = 8192
            ServiceAccount       = "DEMO\ServiceAccount"
            ServerProvisionOrder = @("Server1", "Server2")
            CreateFirewallRules  = $true
            Ensure               = 'Absent'
            PsDscRunAsCredential = $SetupAccount
        }
    }
}