VMware vFabric Data Director 2.7 User guide

VMware
Brand
VMware
Model
vFabric Data Director 2.7
Category
Database software
Type
User guide
VMware vFabric Data Director
Programming Guide
vFabric Data Director 2.7
This document supports the version of each product listed and
supports all subsequent versions until the document is
replaced by a new edition. To check for more recent editions
of this document, see http://www.vmware.com/support/pubs.
EN-001180-00
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2 VMware, Inc.
You can find the most up-to-date technical documentation on the VMware Web site at:
http://www.vmware.com/support/
The VMware Web site also provides the latest product updates.
If you have comments about this documentation, submit your feedback to:
[email protected]
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©
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Contents
vFabric Data Director Programming Guide 5
1
Data Director API Overview 7
REST API Versioning 7
Data Director Concepts 8
Understanding Call Dependencies 9
Client Workflow Overview 11
Create a Data Director REST Request 12
2
Hello vFabric Data Director: A Simplified RESTful Workflow 15
Create a System Resource Bundle 15
Convert a Base DBVM to a Base DB Template 16
Create a Resource Bundle 17
Create an Organization 19
Assign a Resource Bundle to an Organization 19
Enable a Base DB Template 20
Create a Database Group 20
Create a Database 21
3
Database Operations 25
Ingest a Database 25
Clone a Database 26
Refresh a Cloned Database 27
Reconfigure a Database 27
Add a Database to the Catalog 28
Delete a Database 29
4
Safeguarding Data 31
Back Up Data 31
Restore Data 32
5
Enumeration Types, Status Codes, and Response Code Examples 33
Enumeration Types 33
Status Codes 35
Response Code Examples 35
Index 37
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vFabric Data Director Programming Guide
The VMware vFabric Data Director Programming Guide explains how to use the Data Director API.
VMware provides different APIs and SDKs for different applications and goals. This guide has information
for developers who are interested in creating RESTful clients for Data Director.
Revision History
The VMware vFabric Data Director Programming Guide is revised with each release of the product or when
necessary. A revised version can contain minor or major changes.
Table 1. Revision History
Revision Date Description
5May2013 API Version 2.7
11Nov2012 API Version 2.5
10Jul2012 API Version 2.0
20Mar2012 API Version 1.1
Intended Audience
This guide is for software developers who are building Data Director applications, including interactive
clients of Data Director. This guide includes a reference to enumerated types, discussions of the sequence of
commonly performed tasks, and examples of tasks.
Related Publications
The vFabric Data Director Administrator and User Guide contains information about many of the objects and
operations referred to in this guide. This information is helpful when you develop a client application using
the Data Director REST API. To access the current version of this publication and other VMware
publications, go to http://www.vmware.com/support/pubs.
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Data Director API Overview 1
The Data Director API allows developers to build interactive clients of vFabric Data Director using a
RESTful application development style.
Data Director API calls communicate over HTTP, exchanging representations of Data Director objects. These
representations are encoded as XML elements or JSON objects, depending on the format of your request.
You use HTTP GET requests to retrieve the current representation of an object, HTTP POST and PUT
requests to create or update an object, and HTTP DELETE requests to delete an object.
This chapter includes the following topics:
n
“REST API Versioning,” on page 7
n
“Data Director Concepts,” on page 8
n
“Understanding Call Dependencies,” on page 9
n
“Client Workflow Overview,” on page 11
n
“Create a Data Director REST Request,” on page 12
REST API Versioning
The vFabric Data Director REST API supports versioning through HTTP Accept/Content-Type headers.
For example, if you want to use the version 2.0 APIs, append the vFabric Data Director version prefix to the
standard media type in the request Accept header.
Accept: application/vnd.vmware.vfdd-v2.0+json
The response will include a versioned Content-Type response header.
Content-Type: application/vnd.vmware.vfdd-v2.0+json
If you do not include a version prefix in the Accept header, then the response returns the latest version.
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Data Director Concepts
The Data Director API supports a significant subset of the functionality that the Data Director UI supports.
The API is especially well suited for performing resource management and access control.
The Data Director API allows you to perform Create, Read, Update, and Delete operations against Data
Director organizations, users, roles, database groups, databases, and resource bundles. The vFabric Data
Director Administrator and User Guide discusses these concepts in detail. This section gives an overview of
resource assignment in the Data Director environment.
1 System administrators create resource bundles to encapsulate CPU and storage resources. In this
release of the API, a resource bundle includes one resource pool, which encapsulates the CPU and
memory resources, and the storage pools.
Figure 1‑1. Resource Bundles with CPU, Memory, Storage, and Networking Resources
vSphere
source RPs
source datastores
source port groups
CPU & memory
network
resource bundle
CPU & memory
network
Data Director
resource bundle
OS
storage
data
storage
backup
storage
log
storage
OS
storage
data
storage
backup
storage
log
storage
Figure 1‑2. Resource Bundle Contents
resource bundle
CPU/memory pool
storage pool backup storage pool
2 System administrators define an organization and assign one or more resource bundles to an
organization and can also remove resource bundles to ensure an efficient distribution of resources
across the company.
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Figure 1‑3. Resource Bundles and Organizations
resource bundle
organization
3 When organization administrators create database groups, they assign one or more resource bundles to
each database group. The database group can use the resources to create or back up databases.
Figure 1‑4. Resource Bundles and Database Groups
resource bundle
organization
database
group
The database group can only get resources from a resource bundle that is assigned to the database
group's parent organization.
Understanding Call Dependencies
Most of the Data Director calls require as input other objects that you have to retrieve before you make the
call. For example, you cannot register a user for an organization before you have created the user.
This section shows some examples of the sequences of calls for commonly performed tasks.
Create a Resource Bundle
1 Read qualified resource pools.
2 Read the datastores of the selected resource pool.
3 Read the networks for the selected resource pool.
Chapter 1 Data Director API Overview
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4 Create the resource bundle.
Create an Organization and Assign a Resource Bundle
1 Read qualified resource pools.
2 Read the datastores of the selected resource pool.
3 Read the networks of the selected resource pool.
4 Create a resource bundle.
5 Create an organization.
6 Assign the resource bundle to the organization.
Create a Database
1 Create an organization and assign a resource bundle. See “Create an Organization and Assign a
Resource Bundle,” on page 10 above.
2 Create a database group.
3 Read available resource templates in the organization.
4 Read available base DB templates in the resource bundle that is assigned to the database group.
5 Read available backup templates of the organization.
6 Create the database.
When you later want to delete items, you make corresponding calls in reverse order. For example, you
delete all databases that belong to a database group before you delete the database group itself.
Create a User and Grant a Role to the User
If you are working with Data Director users, be aware that Data Director supports two user management
modes.
Global
All users in the system are visible to all organizations. This mode is best for
use within an enterprise. In Global mode, users do not need to register for an
organization to get a role from that organization.
Organization
Users are visible only to the organizations to which they have been granted
access. This mode is best for service providers that host multiple enterprises.
In this mode, users have to register for an organization before they can get a
role from that organization.
To create a user and grant a role to the user, follow these steps.
1 Register or approve the user for an organization.
2 Create a role in the organization.
3 Grant permissions to the user associated with the organization, database group, or database.
4 Grant permissions to the role associated with the organization, database group, or database.
5 Grant the role to the user.
When you later want to delete items, you make corresponding calls in reverse order. For users, you
unregister the user from the organization and you also disable the user before you can delete the user.
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Client Workflow Overview
vFabric Data Director API clients implement a RESTful workflow, making HTTP requests to the server and
retrieving the information they need from the server’s responses.
About RESTful Workflows
REST, an acronym for Representational State Transfer, describes a programming style that relies on inherent
properties of hypermedia to create and modify the state of an object. The object's serialized representation is
accessible as a URL.
If a URL of such an object is known to a client, the client can use an HTTP GET request to retrieve the
representation of the object. In the Data Director API, this representation is an XML document or a JSON
object.
In a RESTful workflow, representations of object state are passed back and forth between a client and a
service with the explicit assumption that both parties have only the information about an object that is
presented in a single request or response. The URLs at which these documents are available often persist
beyond the lifetime of the request or response that includes them.
Data Director REST API Workflows
Application programs written to a REST API use HTTP requests that are often executed by a script or other
higher-level language to make remote procedure calls. These calls create, retrieve, update, or delete objects
that the API defines. In the Data Director API, these objects are defined by a collection of XML schemas. The
operations themselves are HTTP requests, and are generic to all HTTP clients.
To write a RESTful client, you must understand the HTTP protocol and the semantics of either XML or
JSON. You also need an HTTP client, such as Wget. To use the Data Director API effectively with your client
code, you can first learn about Data Director by reviewing the vFabric Data Director Administrator and User
Guide. You can then learn about the Data Director XML schemas, which are documented for both XML and
JSON formats in VMware vFabric Data Director Call Reference . Learn how to answer questions like the
following.
n
What objects does the API support and what do the objects represent. For example, what is a database
group and how does it relate to an organization?
n
How does the API represent these objects. For example, what does the request or response body for an
Org object look like? What do the Org object's elements and attributes represent?
n
How does the client refer to an object on which it wants to operate. For example, where are the links to
objects in a database group? How does a client obtain and use them?
Your client code can read an object by making an HTTP GET request to the object’s URL. Your client code
can create or modify an object with an HTTP POST or PUT request that includes a new or changed XML or
JSON body for the object, and delete an object with an HTTP DELETE request.
RESTful Workflow Patterns
All RESTful workflows follow a common pattern.
1 Make an HTTP request, typically GET, PUT, POST, or DELETE. The target of this request is the path to
the Data Director API, or a URL obtained from the response to a previous request. For example, a GET
request to an organization URL returns Data Director objects that the organization contains.
Chapter 1 Data Director API Overview
VMware, Inc. 11
2 Examine the response, which always includes an HTTP response code and usually includes a body. In
the Data Director API, a response body is an XML or JSON representation of an object, including
elements and attributes that represent object properties, links that implement operations on the object
or provide references to contained or containing objects and, if the object is being created or modified,
an embedded task object that tracks the progress of the creation or modification. The response also
includes an HTTP response code, which indicates whether the request succeeded or failed, and might
be accompanied by a URL that points to a location from which you can retrieve additional information.
These operations can repeat, in this order, for as long as necessary.
Create a Data Director REST Request
To retrieve object data, you can make HTTP requests to the Data Director API. In response to a POST, GET,
PUT, or DELETE request, the server returns the requested data as XML or JSON values depending on the
format you specify in the HTTP header.
Most REST APIs follow the same sequence of steps to implement a call. If you are already an experienced
REST API user, you can skip this section.
Procedure
1 Create a string that has the following format for the HTTP request.
Option Description
HTTP verb
POST, GET, PUT, or DELETE.
url
The URL consists of the host name and the path. The host name is the
network name of the computer that is running Data Director. The path is
the path to the Data Director API package on your computer or network.
headers
The Data Director API supports standard HTTP Accept headers as follows:
Content-type
The value of the Content-type header is
application/xml or application/json, depending on
which request format you use. Always use a
Content-type header with PUT or POST requests
that include a request body.
Accepts
The value of the Accepts header is application/xml
or application/json, depending on the return format
you require. Always use the Accepts header with
GET requests that expect a response body in return.
Authorization:
HTTP basic authentication (RFC 2617).
Location
Requests that create an object, including all
asynchronous requests, which create a task object,
return the created object's URL via this header.
what to do
Either an action or a request body. For simple boolean requests, use an
action. Otherwise, use a request body. See the VMware vFabric Data Director
Call Reference . For examples of object representations, see
http://.../datadirector/api/dataformat.
When you use HTTP GET with any of the Enumerate calls (collection
URLs), the call returns a list of URLs that contain the names of the objects
in a collection. Use HTTP GET again with each of the URLs to retrieve the
data for a specific object. All collection URLs support encoding as
application/xml, application/json, or text/plain media types.
2 Specify authentication information.
REST APIs accept HTTP basic authentication on each request, encoded with an existing Data Director
username and password credential.
3 Encode the XML or JSON request body, if needed.
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4 Send the request to your Data Director HTTP server.
5 Read the response and parse the XML or JSON data within the response.
When you receive a 202 Accepted status and a URL, this is an asynchronous response and you must
poll to find out the results of the call. Use GET followed by the URL to retrieve the results of an
asynchronous response.
6 Use the data in your application.
Example: Request Body
The request body of a RoleCreate call can use XML or JSON.
XML:
<RoleCreate>
<name>sample</name>
<description>sample</description>
<orgId>1</orgId>
<active>true</active>
</RoleCreate>
JSON:
{
"name" : "sample",
"description" : "sample",
"orgId" : 1,
"active" : true
}
Chapter 1 Data Director API Overview
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Hello vFabric Data Director: A
Simplified RESTful Workflow 2
Data Director API clients communicate with Data Director over HTTP, exchanging XML or JSON
representations of Data Director API objects.
The simplified RESTful workflow example illustrates the tasks that you need to perform to create a database
with the REST API. For each task, you must have the appropriate permissions.
This chapter includes the following topics:
n
“Create a System Resource Bundle,” on page 15
n
“Convert a Base DBVM to a Base DB Template,” on page 16
n
“Create a Resource Bundle,” on page 17
n
“Create an Organization,” on page 19
n
“Assign a Resource Bundle to an Organization,” on page 19
n
“Enable a Base DB Template,” on page 20
n
“Create a Database Group,” on page 20
n
“Create a Database,” on page 21
Create a System Resource Bundle
The system resource bundle provides CPU, memory, network, and storage resources for the base database
virtual machines (base DBVMs) and base database templates that you use to create and provision databases.
Each Data Director installation must have one system resource bundle.
You create the system resource bundle before setting up other Data Director entities and populate the
resource bundle with base database templates and base DBVMs.
Prerequisites
n
Create a resource pool to use for allocating CPU and memory resources. Resource pools are part of the
underlying vSphere environment. You can create them using the vSphere Client, the vSphere Web
Client, or the vSphere SDK.
n
Decide on the storage resources that you want to include in the resource bundle. Plan for storage
resources for database storage and resources for backup storage.
n
Decide on the base DB template that you want to assign to the resource bundle. Organization users can
create and provision databases only when base DB templates are assigned to, and enabled in, an
organization's resource bundle or resource bundles. You can assign additional base DB templates to
resource bundles at any time. “Convert a Base DBVM to a Base DB Template,” on page 16 explains
how to create a base DB template.
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n
Decide on the networking resources that you want to include in the resource bundle. The resource
bundle's networking resources are used for the DB access network for the databases in an organization.
Procedure
1 Retrieve data about the resource pools.
GET https://example.aurora.com/datadirector/api/resourcepools?forsysrb=true
From this first call, you learn that the refId of ExampleSysRP is null:ResourcePool:resgroup-9680. You
use the refID in the next two calls.
2 Retrieve information about the datastores associated with the system resource pool.
GET https://example.aurora.com/datadirector/api/resourcepool/
null:ResourcePool:resgroup-9680/datastores
3 Retrieve network information associated with the system resource pool.
GET https://example.aurora.com/datadirector/api/resourcepool/
null:ResourcePool:resgroup-9680/networks
You can now allocate the system resource pool on the datastore using the network information you
retrieved. The HTTP POST call includes payload data that might be included as application code in an
application such as Python or JavaScript.
4 Create the system resource bundle.
POST https://example.aurora.com/datadirector/api/sysresourcebundle
{
"networkRefId":"null:Network:network-1464",
"dataDataStoreRefId":"null:Datastore:datastore-3803",
"resourcePoolRefId":"null:ResourcePool:resgroup-9680",
"ipAllocType":"DHCP"
}
The response that the system returns might look as follows.
202 Accepted location: https://example.aurora.com/datadirector/api/task/55
What to do next
Convert a base DBVM to a base DB template.
Convert a Base DBVM to a Base DB Template
Data Director uses base database templates (base DB templates) to create databases. A base DB template is a
virtual machine that contains all the software required to create a database. Required software includes the
operating system (OS), database, and system software configurations. The base DB template can also contain
third-party tools that are required for a particular environment.
Create a base DB template from a database virtual machine (DBVM). A DBVM is a virtual machine with a
disk layout that contains the seven virtual machine disks (VMDK) required for base DBVMs to work in Data
Director. See vFabric Data Director Administrator and User Guide.
Prerequisites
Create a system resource bundle. See “Create a System Resource Bundle,” on page 15.
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Procedure
1 Retrieve the IDs of the base DBVMs.
GET https://example.aurora.com/datadirector/api/basedbvms
The call returns the data for the base DBVMs. If you decide to use the base DBVM with ID 2 to create a
base DB template, you can make an HTTP POST call to create the base DB template.
2 Create the base DB template.
POST https://example.aurora.com/datadirector/api/basedbtemplates
{
"keepBaseDbvm": true,
"baseDbvmId": 2,
"name": "vpostgress_template"
"diskConfig":{
"instance":[{
"datastoreUsageType":"DATA",
"minimalSizeGb":2,
"internalAddress":"/opt/aurora/data1",
"provisionMode":"THIN",
"description":"DataDisk"
}]
}
}
The response that the system returns might look as follows.
202 Accepted
location: https://example.aurora.com/datadirector/api/task/56
What to do next
Create a resource bundle.
Create a Resource Bundle
Resource bundles allow you to bundle CPU, memory, storage, database template, and networking
resources. You create resource bundles from resource pools.
Prerequisites
n
Create a resource pool to use for allocating CPU and memory resources. Resource pools are part of the
underlying vSphere environment, you can create them using the vSphere Client, the vSphere Web
Client, or the vSphere SDK. See vFabric Data Director Administrator and User Guide for information on
cluster and resource pool requirements for Data Director.
n
Decide on the storage resources that you want to include in the resource bundle. Plan for storage
resources including data stores and corresponding usage types such as backup storage.
n
Decide on the base DB template that you want to assign to the resource bundle. Organization users can
create and provision databases only when base DB templates are assigned to, and enabled in, an
organization's resource bundle or resource bundles. You can assign additional base DB templates to
resource bundles at any time. “Convert a Base DBVM to a Base DB Template,” on page 16 explains how
to create a base DB template.
n
Decide on the networking resources that you want to include in the resource bundle. The resource
bundle's networking resources are used for the DB access network for databases in an organization.
Chapter 2 Hello vFabric Data Director: A Simplified RESTful Workflow
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Procedure
1 Retrieve data about available resource pools; excluding the system resource pool.
GET https://example.aurora.com/resourcepools?forsysrb=false
2 Retrieve network information.
GET https://example.aurora.com/datadirector/api/resourcepool/
null:ResourcePool:resgroup-9680/networks
3 Retrieve information about the base DB templates.
GET https://example.aurora.com/datadirector/api/basedbtemplates
You learn that the template ID for the base DB template is 5.
You can now make an HTTP POST call that includes payload data. The payload data might be included
as application code in a Python or JavaScript application.
4 Create the resource bundle by making an HTTP POST call and specifying network settings, storage
settings, the base DB template, and other attributes.
POST https://example.aurora.com/datadirector/api/resourcebundles
{
"networkSetting": {
"instance": [{
"networkRefId": "null:Network:network-1464","ipAllocType": "DHCP"
}]
},
"name": "AuroraRB",
"minStorageAlpha": 0.8,
"baseDbTemplateId": {
"instance": [{
"templateId": 5
}]
},
"resourcePoolRefId": "null:ResourcePool:resgroup-9673",
"storageAllocs":{
"instance": [{
"datastoreRefId":"null:Datastore:datastore-3803",
"reservationSizeMb":30720,
"usageTypes":{
"instance":["data","os","log","backup"]}
}]
}
}
The response that the system returns might look as follows.
202 Accepted location: https://example.aurora.com/datadirector/api/task/57
What to do next
Create an organization.
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Create an Organization
The Data Director hierarchy consists of organizations, each with its own discrete database groups and
databases. You create organizations to allow organization administrators independent management of their
database groups and databases.
Prerequisites
Create one or more resource bundles to allocate to the organization. See “Create a Resource Bundle,” on
page 17.
Procedure
1 Retrieve the available administrator IDs so you can use the ID to specify the administrator for the
organization.
GET https://example.aurora.com/datadirector/api/users
2 Make an HTTP POST call to create the organization.
POST https://example.aurora.com/datadirector/api/orgs
{
"adminId": 1,
"name": "AuroraOrg"
}
The response that the system returns might look as follows.
202 Created location: https://example.aurora.com/datadirector/api/org/82
What to do next
Assign a resource bundle to the organization.
Assign a Resource Bundle to an Organization
Before the organization administrator can create a database in the organization, the system administrator
has to assign a resource bundle to the organization.
Prerequisites
n
Create a resource bundle. See “Create a Resource Bundle,” on page 17.
n
Create an organization. See “Create an Organization,” on page 19.
Procedure
1 Retrieve a list of all resource bundle IDs.
GET https://example.aurora.com/datadirector/api/resourcebundles
2 Retrieve a list of all organization IDs.
GET https://example.aurora.com/datadirector/api/orgs
3 Assign one of the resource bundles to one of the organizations.
POST https://example.aurora.com/datadirector/api/resourcebundle/81?action=assign&org=82
This call performs an assign action and does not include payload data. The response might look like the
following.
204 No Content
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What to do next
Enable a base DB template.
Enable a Base DB Template
Organization administrators enable a base DB template on the underlying resource bundles so that
organization users can provision databases based on the base DB template.
Prerequisites
Assign at least one base DB template to the resource bundles of the organization. See “Assign a Resource
Bundle to an Organization,” on page 19.
Procedure
1 Retrieve a list of resource bundles.
GET https://example.aurora.com/datadirector/api/resourcebundles
2 Enable the base DB template for the resource bundle with the ID you select, in this example, 81.
POST https://example.aurora.com/datadirector/api/basedbtemplate/5?action=enable&rbId=81
This call performs an assign action and does not include payload data. The response might look like the
following.
202 Accepted location: https://example.aurora.com/datadirector/api/task/58
What to do next
Create a database group.
Create a Database Group
Database groups contain sets of databases within an organization. Database groups enable grouping of
related databases and provide efficient use of resources that are needed to provision and operate databases.
Prerequisites
n
Assign at least one resource bundle to the organization where you want to create a database group. See
“Assign a Resource Bundle to an Organization,” on page 19.
n
Enable at least one base DB template in the organization. See “Enable a Base DB Template,” on page 20.
Procedure
1 Retrieve the list of resource bundles and look for the ID of the resource bundle that you want to use.
GET https://example.aurora.com/datadirector/api/resourcebundles
2 Retrieve the list of organizations and look for the ID of the organization that you want to use.
GET https://example.aurora.com/datadirector/api/orgs
3 Retrieve the network information for the resource pool.
Because Data Director does not have the resource pool ID, you access it indirectly.
GET https://example.aurora.com/datadirector/api/resourcepool/
null:ResourcePool:resgroup-9673/networks
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VMware vFabric Data Director 2.7 User guide

VMware
Brand
VMware
Model
vFabric Data Director 2.7
Category
Database software
Type
User guide
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