Built-in Node Types

Abstract Types

The following node_types are basic types from which concrete types with specific plugin implementations are derived.

• cloudify.nodes.Root - The base type for all built-in types. Declares the following interfaces:

  • cloudify.interfaces.lifecycle: An interface for standard life cycle operations (e.g. create, start, stop, etc.). Operations of this interface are called from the built-in install and uninstall workflows.
  • cloudify.interfaces.validation: An interface for pre-creation and pre-deletion validation operations. These can be called by using the execute_operation built-in workflow or by a custom workflow.
  • cloudify.interfaces.monitoring_agent: An interface for monitoring agent. Operations of this interface are called from the built-in install and uninstall workflows.
  • cloudify.interfaces.monitoring: An interface for monitoring configuration. Operations of this interface are called from the built-in install and uninstall workflows.

• cloudify.nodes.Tier - A marker for a future scale group.

• cloudify.nodes.Compute - A compute resource. Either a virtual or a physical host.

• cloudify.nodes.Container - A logical partition in a host such as Linux container or Docker.

• cloudify.nodes.Network - A virtual network.

• clouydify.nodes.Subnet - A virtual segment of an IP addresses in a network.

• cloudify.nodes.Router - A virtual layer 3 router.

• cloudify.nodes.Port - An entry in a virtual subnet. Can be used in some Clouds to secure a static private IP.

• cloudify.nodes.VirtualIP - A virtual IP implemented as NAT, or in another manner.

• cloudify.nodes.SecurityGroup - A Cloud security group. (VM network access rules)

• cloudify.nodes.LoadBalancer - A virtualized load balancer.

• cloudify.nodes.Volume - A persistent block storage volume.

• cloudify.nodes.FileSystem - A writable file system. This type must be used in conjunction with a cloudify.nodes.Volume type and a cloudify.nodes.Compute type.

  • relationships: The conjunction stated above is expressed by specifying two mandatory relationships for the file system.
    • cloudify.relationships.file_system_depends_on_volume - Used to format and partition the file system on top of the volume. It creates a single partition occupying the entire capacity of the volume.
    • cloudify.relationships.file_system_contained_in_compute - Used to mount and unmount the file system from the server.
  • properties:
    • use_external_resource - Enables the use of already formatted volumes. In this case, the formatting part is skipped, and only a mount point id created. Defaults to False. (Boolean)
    • partition_type - The partition type. Defaults to 83 which is a Linux native partition. (Integer)
    • fs_type - The type of the File System. Supported types are: ext2, ext3, ext4, fat, ntfs, swap
    • fs_mount_path - The path of the mount point.
  • Example Usage:

              volume_fs:
                type: cloudify.nodes.FileSystem
                properties:
                  fs_type: ext4
                  fs_mount_path: /mount-path
                relationships:
                  - type: cloudify.relationships.file_system_depends_on_volume
                    target: volume
                  - type: cloudify.relationships.file_system_contained_in_compute
                    target: vm
            

• cloudify.nodes.ObjectStorage - A BLOB storage segment.

• cloudify.nodes.SoftwareComponent - A base type for all middleware level types.

• cloudify.nodes.WebServer - A Web server.

  • properties:
    • port - The Webserver port.

• cloudify.nodes.ApplicationServer - An application server.

• cloudify.nodes.DBMS - A database.

• cloudify.nodes.MessageBugServer - A message BUS server.

• cloudify.nodes.ApplicationModule - A base type for any application module or artifact.