Puppet Types and Providers: Extending Puppet with Ruby


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What is Puppet Retrospec?
Puppet Server Using Tidy, Host and Augeas Resources

To expand upon this last point a little here you can define a set of puppet resources that are a prerequisite for your type. Puppet will if these resources actually exist, add in dependency edges to the graph and ensure that the prerequisites are executed before your type. The second layer is the provider which actually performs the actions to inspect and manage the resource. These are runtime selectable with the provider class parameter, or are implicitly chosen by way of being the only provider, or based on facts.


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As an example the package builtin type will check which distro you are running and based on that use apt or yum etc. Delving a little deeper into providers the general functionality is as follows. Likewise if it exists and is requested absent then the provider will be asked to delete the resource. The final case is where the resource exists and is requested to be present. Puppet will inspect each property of the real resource defined by the type and compare with the requested values from the catalogue.

If they differ then puppet will ask the provider to perform the necessary updates. Hopefully those concepts were straight forward and made clear sense. So lets look at how this all fits together. The first few lines are just boilerplate code, here you define the name of your type as it will appear in puppet code, and documentation, because everyone loves documentation right? The name parameter must be defined.

Following that is our first encounter with parameter validation, which is basically checking for a hostname followed by a slash and one of our supported resource record types. Probably not the most RFC compliant regular expression but it works for now! It would have been easy to omit the override and just let things raise exceptions, but I like giving my peers useful debug.

Onto the main body of the provider. The final four calls are accessors for the properties we defined earlier. And hopefully yours too!

Puppet - Type and Provider

Until next time. Programming , Technology. March 15, Posted by Jenny Centred. This is mostly used for logging purposes. Lifecycle method for a resource. This is called during graph creation. It should perform any consistency checking of the catalog and raise a Puppet::Error if the transaction should be aborted. It differs from the validate method, since it is called later during initialization and can rely on self.

May need to be overridden by types that offer up more than just :absent and :present.

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The order the properties where added in the ruby file adding a new type with new properties? To return the value, use ' resource '. Is this internal API in transactions? This method is used by transactions to forbid deletion when there are dependencies. Returns whether this resource is being purged or not. As opposed to all non contained properties? Retrieves the current value of all contained properties. Parameters and meta-parameters are not included in the result.

Retrieve the current state of the system as a Puppet::Resource. For the base Puppet::Type this does the same thing as retrieve, but specific types are free to implement retrieve as returning a hash, and this will call retrieve and convert the hash to a resource. This is used when determining when syncing a resource. This method can be handed a list of attributes, and if so it will only set defaults for those attributes.

Needs a better explanation, and investigation about the claim an array can be passed it is passed to self. Otherwise, false is returned. Does it contain meta-parameters? Returns a hash of WHAT?. The hash is a shallow copy, any changes to the objects returned in this hash will be reflected in the original resource having these attributes.

This key is an array of all key attributes' values. Each distinct tuple must be unique for each resource type. Only non structural basic data types supported? The default provider, or the most suitable provider if no default provider was set.

The returned lists contains instances if Puppet::Property or its subclasses. The provider that has been selected for the instance of the resource type. Initializes all of the variables that must be initialized for each subclass. Returns any parameters that should be included by default in puppet resource's output. Returns a list of one suitable provider per source, with the default provider first. Returns whether or not the given name is the name of a property, parameter or meta-parameter. Returns a list of valid property names, or an empty hash if there are none. Sets the 'should' wanted state value of a property, or the value of a parameter.

Creates a new property value holder for the resource if it is valid and does not already exist. Returns the ancestors - WHAT? This implementation always returns an empty list. Returns the name of the namevar if there is only one or false otherwise. Returns a string representation of the resource's containment path in the catalog. Returns all of the property objects, in the order specified in the class. Returns whether the attribute given by name has been added to this resource or not.

Class Attribute Details.

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Note: a warning will be issued if no default provider has been configured and a search for the most suitable provider returns more than one equally suitable provider. Returns: Puppet::Provider , nil — the default or most suitable provider, or nil if no provider was found. Returns: String — the name of the resource type; e. Returns: Boolean — true if the type should send itself a refresh event on change.

TODO — The catalog that this resource is stored in. Returns: Boolean — Flag indicating if this type is exported.

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ruby - How do I add a provider for the package type in Puppet? - Server Fault

Returns: String — The file from which this type originates from. Returns: Integer — The line in file from which this type originates from. Returns: Boolean — true if running in noop mode. Returns hash of parameters originally defined. Returns: Hash — hash of parameters originally defined. Returns: Puppet::Provider , nil — the selected provider or nil, if none has been selected.

Subversion Provider Use Case

Returns: String — Returns the title of this object, or its name if title was not explicitly set. Returns: Boolean — Flag indicating if the type is virtual it should not be. Class Method Details. Returns: Boolean. Returns the class associated with the given attribute name.

Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby
Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby
Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby
Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby
Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby
Puppet Types and Providers: Extending Puppet with Ruby Puppet Types and Providers: Extending Puppet with Ruby

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