[autoscaler] Adding Azure Support (#7080)

* adding directory and node_provider entry for azure autoscaler

* adding initial cut at azure autoscaler functionality, needs testing and node_provider methods need updating

* adding todos and switching to auth file for service principal authentication

* adding role / scope to service principal

* resolving issues with app credentials

* adding retry for setting service principal role

* typo and adding retry to nic creation

* adding nsg to config, moving nic/public ip to node provider, cleanup node_provider, leaving in NodeProvider stub for testing

* linting

* updating cleanup and fixing bugs

* adding directory and node_provider entry for azure autoscaler

* adding initial cut at azure autoscaler functionality, needs testing and node_provider methods need updating

* adding todos and switching to auth file for service principal authentication

* adding role / scope to service principal

* resolving issues with app credentials

* adding retry for setting service principal role

* typo and adding retry to nic creation

* adding nsg to config, moving nic/public ip to node provider, cleanup node_provider, leaving in NodeProvider stub for testing

* linting

* updating cleanup and fixing bugs

* minor fixes

* first working version :)

* added tag support

* added msi identity intermediate

* enable MSI through user managed identity

* updated schema

* extend yaml schema
remove service principal code
add re-use of managed user identity

* fix rg_id

* fix logging

* replace manual cluster yaml validation with json schema
- improved error message
- support for intellisense in VSCode (or other IDEs)

* run linting

* updating yaml configs and formatting

* updating yaml configs and formatting

* typo in example config

* pulling default config from example-full

* resetting min, init worker prop

* adding docs for azure autoscaler and fixing status

* add azure to docs, fix config for spot instances, update azure provider to avoid caching issues during deployment

* fix for default subscription in azure node provider

* vm dev image build

* minor change

* keeping example-full.yaml in autoscaler/azure, updating azure example config

* linting azure config

* extending retries on azure config

* lint

* support for internal ips, fix to azure docs, and new azure gpu example config

* linting

* Update python/ray/autoscaler/azure/node_provider.py

Co-Authored-By: Richard Liaw <rliaw@berkeley.edu>

* revert_this

* remove_schema

* updating configs and removing ssh keygen, tweak azure node provider terminate

* minor tweaks

Co-authored-by: Markus Cozowicz <marcozo@microsoft.com>
Co-authored-by: Ubuntu <marcozo@mc-ray-jumpbox.chcbtljllnieveqhw3e4c1ducc.xx.internal.cloudapp.net>
Co-authored-by: Richard Liaw <rliaw@berkeley.edu>

python/setup.py

@@ -42,6 +42,7 @@ optional_ray_files = []
 
 ray_autoscaler_files = [
     "ray/autoscaler/aws/example-full.yaml",
+    "ray/autoscaler/azure/example-full.yaml",
     "ray/autoscaler/gcp/example-full.yaml",
     "ray/autoscaler/local/example-full.yaml",
     "ray/autoscaler/kubernetes/example-full.yaml",