Differences

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--- cloud:recipe:coding [2020/05/14 08:50] – chudler
+++ cloud:recipe:coding [2020/05/14 18:32] (current) – chudler
@@ Line 2: / Line 2: @@
 This document gives a quick introduction to using the Openstack Python client to discover and consume compute resources.
-Before beginning, get an account as described in the [[ cloud:intro | Introduction ]]
+Before beginning, get an account as described in the [[ cloud:intro | Introduction ]]. This is the right place to read about writing python scripts. A companion document shows how to use the [[ cloud:cli | Command Line ]].
 ======Installation======
@@ Line 48: / Line 48: @@
 </code>
+The main flaw here is that you are taking risks by storing your University credentials in a file. Instead, you can use the API or web interface to create an Application Credential. For example,
+<code>
+openstack application credential create --secret sekret --role member --expiration 2020-10-10:10:10:10 --restricted myapp
+</code>
 =====Testing and Usage=====
 Ensure you can load the python module
@@ Line 64: / Line 69: @@
 You have failed to provide a configuration file. This is different from a syntax error, but not so different from a permission problem, for example.
+======Demo Code======
+The following Python code shows how to create and destroy a server, and obtain information about Networks, Images, and Flavors. Consult the [[ https://docs.openstack.org/openstacksdk/latest/user/index.html#api-documentation | API Resource Documentation ]] to see what else is possible.
+For your learning, contrast this with the equivalent actions that are taken in the [[ cloud:cli | Command Line Usage Guide ]].
+<code Python>
+import openstack
+from openstack.config import loader
+# to enable debug logging
+# openstack.enable_logging(True)
+config = loader.OpenStackConfig()
+cloud = openstack.connect(cloud='openstack')
+flavor = cloud.get_flavor_by_ram(2048)
+# print(flavor.name)
+image = cloud.get_image('20.04')
+# pretty print
+# cloud.pprint(image)
+network = cloud.get_network('campus37')
+try:
+    server = cloud.create_server('myserver', image=image, flavor=flavor, network=network, wait=True, auto_ip=True)
+finally:
+    cloud.delete_server('myserver', wait=True, delete_ips=True)
+</code>