{"id":7318,"date":"2015-01-23T17:31:59","date_gmt":"2015-01-23T15:31:59","guid":{"rendered":"http:\/\/blog.zhaw.ch\/icclab\/?p=7318"},"modified":"2015-01-23T23:02:23","modified_gmt":"2015-01-23T21:02:23","slug":"smartdatacenter-apis-turning-up-the-heat","status":"publish","type":"post","link":"https:\/\/blog.zhaw.ch\/icclab\/smartdatacenter-apis-turning-up-the-heat\/","title":{"rendered":"SmartDataCenter APIs – turning up the Heat"},"content":{"rendered":"

As mentioned in the first post<\/a> about SmartDataCenter, it features various APIs. In this post we will have a look at them. Further I\u00a0would like to present sdcadmin & sdc-heat, two small Python projects I have been working on. The former is a Python client library for SDCs admin APIs. The latter is an OpenStack Heat plugin that allows provisioning of SmartMachines and KVM VMs on SDC.<\/p>\n

<\/p>\n

For the customers, there is a public facing REST API called the cloudapi. It is the only API that a customer reaches and is also used for the Joyent public cloud<\/a>. The full\u00a0documentation can be\u00a0found here<\/a>. It allows\u00a0management of various resources, ranging from VMs to sub-users of your account. A small example for SSH keys associated with a\u00a0login:
\nGET \/:login\/keys<\/code> will return\u00a0a list of all SSH keys for the specified :login<\/code>, while POST \/:login\/keys<\/code> with the correct data sent will register\u00a0a new one.<\/p>\n

For authorization, the cloudapi uses something rather special: every HTTP request must be signed with a registered\u00a0SSH private key. The Authorization<\/code> field should look like this:<\/p>\n

Authorization: Signature keyId=\"\/loginname\/keys\/my-key\",algorithm=\"rsa-sha256\" <Base64(rsa(sha256($Date)))><\/pre>\n
Where\u00a0\/loginname\/keys\/my-key<\/code> corresponds to \/:login\/keys\/:key-name<\/code> and Base64(rsa(sha256($Date)))><\/code> to the Base64-encoded RSA digital signature of the date of the header, created with the mentioned key. Details are found here<\/a>\u00a0and here<\/a>.<\/p>\n
To interact with the cloudapi, Joyent provides the\u00a0node.js package smartdc<\/a> which doubles as a CLI as well for the use in your own programs. There is also a version for Python<\/a> by Telef\u00f3nica<\/a>.<\/p>\n
\n
To accomplish the actual tasks, the cloudapi talks to the internal APIs on the admin network. In the following pictures a simplified version of SDCs services and their connectivity to the admin and external network is shown. A full overview is found here<\/a>.<\/p>\n
\"SDC<\/p>\n
Following a service oriented architecture, SDC divides the responsibilities for various resources\u00a0in compact, easy-to-understand API-components. Most of the APIs have a somewhat speaking name. In the table below you find an overview of the core APIs, what they cover and the equivalent project in OpenStack.<\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
Service Name<\/th>Description<\/th>OpenStack equivalent<\/th>\n<\/tr>\n<\/thead>\n
amon<\/a><\/td>alarming and monitoring<\/td>Monasca<\/a><\/td>\n<\/tr>\n
cloud-analytics<\/a><\/td>performance metrics<\/td>Ceilometer<\/a><\/td>\n<\/tr>\n
cnapi<\/a><\/td>compute node api<\/td>Nova<\/a><\/td>\n<\/tr>\n
fwapi<\/a><\/td>firewall api<\/td>Neutron<\/a><\/td>\n<\/tr>\n
imgapi<\/a><\/td>image api<\/td>Glance<\/a><\/td>\n<\/tr>\n
napi<\/a><\/td>network api<\/td>Neutron<\/a><\/td>\n<\/tr>\n
papi<\/a><\/td>package api<\/td>Flavors in Nova<\/a><\/td>\n<\/tr>\n
sapi<\/a><\/td>service api<\/td>Services in Keystone<\/a><\/td>\n<\/tr>\n
vmapi<\/a><\/td>virtual machine api<\/td>Servers in Nova<\/a><\/td>\n<\/tr>\n
workflow<\/a><\/td>job runner, orchestrator<\/td>Heat<\/a><\/td>\n<\/tr>\n
ufds<\/a><\/td>users, accounts, roles (ldap)<\/td>Keystone<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n
As these APIs are only available on the protected internal admin network. To interact with the various APIs, Joyent provides again a node.js package<\/a>.<\/p>\n
sdcadmin – a Python client library for admin network APIs<\/h1>\n
I have been working on a client library for the SDC admin APIs called sdcadmin. It aims to let the Python user interact with SDC in an easy way. To create a VM, all you need to do is:<\/p>\n
from sdcadmin.datacenter import DataCenter\r\ndc = DataCenter(sapi=sapi_ip)\r\nall_smart_machines = dc.list_smart_machines()\r\nmy_machine = dc.create_smart_machine(owner=user_uuid, \r\n                                     networks=[network_uuid],\r\n                                     package=package_small, \r\n                                     image=smartmachine_image,\r\n                                     alias='my_first_smart_machine')<\/pre>\n
The DataCenter object manages the discovery of the required APIs using the service API\u00a0(sapi),\u00a0handles the HTTP requests and provides list_*<\/code>, get_*<\/code> and create_*<\/code> functions. Returned machines (both SmartMachines and KVM) provide functions to control their lifecycle:<\/p>\n
my_machine = dc.create_smart_machine(...)\r\nmy_machine.poll_until(status=dc.STATE_RUNNING)\r\nmy_machine.status() # => 'running'\r\nmy_machine.stop()\r\nmy_machine.poll_until(status=dc.STATE_STOPPED)\r\nmy_machine.is_stopped() # => True\r\nmy_machine.delete()\r\n<\/pre>\n
State changes such as start()<\/code>, stop()<\/code>, destroy()<\/code> and\u00a0complementary blocking operations such as poll_until(...)<\/code> and poll_while(...)<\/code> are available. The documentation is still incomplete, but will be improved as the project grows.<\/p>\n
It’s open source, the source is available\u00a0on Github<\/a>. The package is also available on the Python Package Index<\/a>\u00a0for easy installation via pip (pip install sdcadmin<\/code>). Pull requests are more than welcome! Having issues? Post them directly on Github<\/a>.<\/p>\n
Turning up the Heat<\/h1>\n
Using sdcadmin I\u00a0created a plugin<\/a> for OpenStacks Orchestrator Heat. In its current version, it allows to provision SmartMachines and KVM VMs(SDC::Compute::SmartMachine &\u00a0SDC::Compute::KVM<\/code>).<\/p>\n
Initially I intended to use the cloudapi<\/a> for the plugin. Quickly I realised that not all required resources (networks) are available and the above mentioned authorization required put me off. The use of the admin network API on the other hand requires Heat to be on the admin network itself.<\/p>\n
\"SDC<\/a><\/p>\n
Installation instructions for a minimal KVM VM only running Heat and Keystone are found in the README\u00a0on Github<\/a>. Some templates for SmartMachines<\/a> and KVM VMs<\/a>\u00a0are also included. As with sdcadmin, pull requests<\/a> are welcome! Any issues? Post them directly on Github<\/a>.<\/p>\n
Schlagw\u00f6rter: opensource<\/a>, Python<\/a>, sdc<\/a>, smartos<\/a>
<\/div>","protected":false},"excerpt":{"rendered":"
As mentioned in the first post about SmartDataCenter, it features various APIs. In this post we will have a look at them. Further I\u00a0would like to present sdcadmin & sdc-heat, two small Python projects I have been working on. The former is a Python client library for SDCs admin APIs. The latter is an OpenStack […]<\/p>\n","protected":false},"author":163,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5,20],"tags":[239,273,549,301],"features":[],"class_list":["post-7318","post","type-post","status-publish","format-standard","hentry","category-articles","category-open-source","tag-opensource","tag-python","tag-sdc","tag-smartos-2"],"yoast_head":"\nSmartDataCenter APIs - turning up the Heat - Service Engineering (ICCLab & SPLab)<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.zhaw.ch\/icclab\/smartdatacenter-apis-turning-up-the-heat\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SmartDataCenter APIs - turning up the Heat\" \/>\n<meta property=\"og:description\" content=\"As mentioned in the first post about SmartDataCenter, it features various APIs. In this post we will have a look at them. Further I\u00a0would like to present sdcadmin & sdc-heat, two small Python projects I have been working on. The former is a Python client library for SDCs admin APIs. 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