pcmkr cluster

Overview

This resource allows you to manage an Pacemaker cluster. Here is an example on how to use this:

pcmkr_cluster { 'cluster':
  ensure     => 'present',
  interfaces => ['eth0', 'eth0'],
  nodes      => ['db1157a', 'db1157b'],
}

All of these properties are read-only. If you need to add nodes, or change interfaces, the cluster must be recreated. At this point in time Puppet does not take care of this.

Attributes

disable_corrective_change

Disable the modification of a resource when Puppet decides it is a corrective change.

(requires easy_type V2.11.0 or higher)

When using a Puppet Server, Puppet knows about adaptive and corrective changes. A corrective change is when Puppet notices that the resource has changed, but the catalog has not changed. This can occur for example, when a user, by accident or willingly, changed something on the system that Puppet is managing. The normal Puppet process then repairs this and puts the resource back in the state as defined in the catalog. This process is precisely what you want most of the time, but not always. This can sometimes also occur when a hardware or network error occurs. Then Puppet cannot correctly determine the current state of the system and thinks the resource is changed, while in fact, it is not. Letting Puppet recreate remove or change the resource in these cases, is NOT wat you want.

Using the disable_corrective_change parameter, you can disable corrective changes on the current resource.

Here is an example of this:

crucial_resource {'be_carefull':
  ...
  disable_corrective_change => true,
  ...
}

When a corrective ensure does happen on the resource Puppet will not modify the resource and signal an error:

    Error: Corrective change present requested by catalog, but disabled by parameter disable_corrective_change
    Error: /Stage[main]/Main/Crucial_resource[be_carefull]/parameter: change from '10' to '20' failed: Corrective change present requested by catalog, but disabled by parameter disable_corrective_change. (corrective)

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disable_corrective_ensure

Disable the creation or removal of a resource when Puppet decides is a corrective change.

(requires easy_type V2.11.0 or higher)

When using a Puppet Server, Puppet knows about adaptive and corrective changes. A corrective change is when Puppet notices that the resource has changed, but the catalog has not changed. This can occur for example, when a user, by accident or willingly, changed something on the system that Puppet is managing. The normal Puppet process then repairs this and puts the resource back in the state as defined in the catalog. This process is precisely what you want most of the time, but not always. This can sometimes also occur when a hardware or network error occurs. Then Puppet cannot correctly determine the current state of the system and thinks the resource is changed, while in fact, it is not. Letting Puppet recreate remove or change the resource in these cases, is NOT wat you want.

Using the disable_corrective_ensure parameter, you can disable corrective ensure present or ensure absent actions on the current resource.

Here is an example of this:

crucial_resource {'be_carefull':
  ensure                    => 'present',
  ...
  disable_corrective_ensure => true,
  ...
}

When a corrective ensure does happen on the resource Puppet will not create or remove the resource and signal an error:

    Error: Corrective ensure present requested by catalog, but disabled by parameter disable_corrective_ensure.
    Error: /Stage[main]/Main/Crucial_resource[be_carefull]/ensure: change from 'absent' to 'present' failed: Corrective ensure present requested by catalog, but disabled by parameter disable_corrective_ensure. (corrective)

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ensure

The basic property that the resource should be in.

Valid values are present, absent.

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interfaces

The public network interfaces Pacemaker uses for this instance.

This array must be synced with the nodes in the nodes property. This means that entry 0 in this array belongs to entry 0 in the interfaces array etc.

This is a read-only property and cannot be changed.

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leader

The pacemaker leader. This is a read-only property.

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location

The location of the software the instance is running from.

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name

The name of the Pacemaker cluster.

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nodes

The node that are part of the Pacemaker instance.

This is a read-only property and cannot be changed.

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provider

The specific backend to use for this pcmkr_cluster resource. You will seldom need to specify this — Puppet will usually discover the appropriate provider for your platform.Available providers are:

db2cm

Manage an Pacemaker cluster

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version

The pacemaker version. This is a read-only property.

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