Python wrapper for cloud service provider APIs/SDKs
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README.md

Cloud Harness

Python wrapper for cloud service provider APIs/SDKs.

Supported Cloud Providers

Installation and Configuration

  • from a working Python environment, run pip install -r requirements.txt && git clone https://github.com/ab77/cloud-harness.git /opt/cloud-harness && pushd /opt/cloud-harness
  • copy cloud-harness.sample.conf to cloud-harness.conf
  • download and save your Azure PublishSettings file with .publishsettings extension to the same directory
  • run ./cloud-harness.py azure for the first time to extract your management certificate and update the config file automatically (or manually if you wish)
  • set default location_name in cloud-harness.conf config file (e.g. East US), run python ./cloud-harness.py azure for the default action list_locations
  • set other configuration properties as required in cloud-harness.conf config file (e.g. storage_account and service_certificate)
  • to use the new Azure Resource Management (ARM) APIs, you'll need to follow these steps.

General Usage

  • run python ./cloud-harness.py azure --help to see all available command line options
  • to get get a list of required parameters for a particular action (e.g. add_role), run python ./cloud-harness.py azure --action add_role
  • specify --verbose flag to see various run-time properties
  • specify --readonly flag to limit operations, which would otherwise perform changes (usually together with --verbose)
  • specify --async flag to return from calls immediately, without waiting for operation completion

Supported Resource Extensions

The following resource extensions are supported (use --extension <extension> <extension> ... <ext>):

  • ChefClient (Windows|Linux)
  • CustomScript (Windows|Linux)
  • VMAccessAgent (Windows|Linux)
  • OSPatching (Linux)
  • DockerExtension (Linux)
  • DSC (Windows)
  • PuppetEnterpriseAgent (Windows|Linux)
  • BGInfo (Windows|Linux)
  • OctopusDeploy (Windows)

Examples

Some useful examples to deploy virtual machines and various resource extensions.

Create storage account (name must be unique as it forms part of the storage URL, check with --action check_storage_account_name_availability):
./cloud-harness.py azure --action create_storage_account \
--account myuniquestorageaccountname01 \
--verbose

Remember to update storage_account in cloud-harness.py with the name of the storage account you've just created.

Create a new hosted service (name must be unique within cloudapp.net domain, check with --action check_storage_account_name_availability):
./cloud-harness.py azure --action create_hosted_service \
--service my-hosted-service \
--label 'my hosted service' \
--verbose
Add x.509 certificate containing RSA public key for SSH authentication to the hosted service:
./cloud-harness.py azure --action add_service_certificate \
--service my-hosted-service \
--certificate service_certificate.cer \
--verbose
Create a reserved IP address for the hosted service:
./cloud-harness.py azure --action create_reserved_ip_address \
--ipaddr my-reserved-ip-address \
--verbose
Create Virtual Network:
./cloud-harness.py azure --action create_virtual_network_site \
--network VNet1 \
--subnet Subnet-1 \
--subnetaddr 10.0.0.0/11 \
--vnetaddr 10.0.0.0/8 \
--verbose
List OS Images:
./cloud-harness.py azure --action list_os_images
Create a new Linux virtual machine deployment and role with reserved IP, SSH authentication and CustomScript resource extension[n3]:
./cloud-harness.py azure --action create_virtual_machine_deployment \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-ubuntu-virtual-machine \
--label 'my deployment' \
--account my-storage-account \
--blob b39f27a8b8c64d52b05eac6a62ebad85__Ubuntu_DAILY_BUILD-wily-15_10-amd64-server-20150722-en-us-30GB \
--os Linux \
--network my-virtual-network-name \
--subnet my-subnet-name \
--ipaddr my-reserved-ip-address \
--size Medium \
--extension CustomScript \
--ssh_auth \
--disable_pwd_auth \
--verbose
Add Docker extension to the Linux virtual machine[n6]:
./cloud-harness.py azure --action add_resource_extension \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-ubuntu-virtual-machine \
--extension DockerExtension \
--docker_compose compose.yaml \
--verbose	

Note, the Docker extension relies on certain pre-requisites, incl. certificates. See this article on how to generate these and don't forget to update the [DockerExtension] section in cloud-harness.conf afterwards.

Create a Linux virtual machine (role) with a random alpha-numeric password[n2], add CustomScript and ChefClient extensions:
./cloud-harness.py azure --action add_role \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-second-ubuntu-virtual-machine \
--label 'my Linux (Ubuntu) virtual machine' \
--account my-storage-account \
--blob b39f27a8b8c64d52b05eac6a62ebad85__Ubuntu_DAILY_BUILD-wily-15_10-amd64-server-20150722-en-us-30GB \
--os Linux \
--network my-virtual-network-name \
--subnet my-subnet-name \
--size Medium \
--extension CustomScript ChefClient \
--verbose
Add data disk to virtual machine:
./cloud-harness.py azure --action add_data_disk \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-second-ubuntu-virtual-machine \
--account my-storage-account \
--verbose
Create a Windows virtual machine (role) with random alpha-numeric password, and CustomScript extension[n4]:
./cloud-harness.py azure --action add_role \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-windows-virtual-machine \
--label 'my Windows 2K8R2 virtual machine' \
--account my-storage-account \
--os Windows \
--blob a699494373c04fc0bc8f2bb1389d6106__Win2K8R2SP1-Datacenter-201505.01-en.us-127GB.vhd \
--network my-virtual-network-name \
--subnet my-subnet-name \
--size Medium \
--extension CustomScript \
--verbose
Add ChefClient and DSC (Desired State Configuration) extensions to the Windows virtual machine[n7]:
./cloud-harness.py azure --action add_resource_extension \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-windows-virtual-machine \
--extension ChefClient DSC \
--dsc_module IISInstall.ps1.zip \
--verbose	
Reset the Administrator password on the Windows VM using VMAccess extension:
./cloud-harness.py azure --action add_resource_extension \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-second-ubuntu-virtual-machine \
--extension VMAccessAgent \
--password new-s3cure-passw0rd \
--verbose
Update Linux virtual machine (role) using OSPatching extension:
./cloud-harness.py azure --action add_resource_extension \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-second-ubuntu-virtual-machine \
--extension OSPatching \
--patching_oneoff \
--verbose
Secure the virtual machine, by adding ACLs to the public facing port(s)[n5]:
./cloud-harness.py azure --action set_epacls \
--service my-hosted-service \
--deployment my-virtual-machine-deployment \
--name my-ubuntu-virtual-machine \
--subnet my-subnet-name \
--verbose
DESTROY service, deployment, virtual machines (roles), disks and associated VHDs:
./cloud-harness.py azure --action delete_hosted_service \
--service my-hosted-service \
--delete_disks \
--delete_vhds \
--verbose
DELETE reserved IP address:
./cloud-harness.py azure --action delete_reserved_ip_address \
--ipaddr my-reserved-ip-address

Fiddler Proxy

To use Fiddler2 to capture HTTPS traffic to the API

  • export your Azure Management Certificate as base64 encoded x.509 as ClientCertificate.cer
  • place it into your Fiddler2 directory (e.g. C:\Users\<user>\Documents\Fiddler2)
  • set proxy = True in cloud-harness.conf and re-launch Fiddler2 [n1]

Further Work

Lots, including:

  • implement new Azure Resource Management APIs
  • implement (at least) one additional cloud service provider (e.g. DigitalOcean)
  • add a suitable unittest framework
  • implement additional VM extensions (OctopusDeploy, etc.)
  • where it makes sense, move user-configurable defaults to config file
  • automate Chef Server deployment from Azure image

-- ab1

Notes

[n1] For more information, see Using Fiddler to decipher Windows Azure PowerShell or REST API HTTPS traffic.

[n2] SSH authentication is not compatible with ChefClient extension due to the way it currently handles certificates PR45.

[n3] CustomScript extension on Linux by default, will run bootstrap.sh to upgrade WAAgent as well as un-pack/execute linux_custom_data.dat where you can put additional bootstrap commands.

[n4] CustomScript extension on Windows by default, will run bootstrap.ps1 to un-pack/execute windows_custom_data.dat where you can put additional bootstrap commands.

[n5] update_role() currently resets ACLs, use --action set_epacls to set them again if you get a warning. Also, this operation will cause a reboot and currently generates new public facing port numbers.

[n6] Docker is secured by default with SSL, using a server certificate signed by a private CA.

[n7] DSC configuration archive can be compiled using PowerShell, run Publish-AzureVMDscConfiguration .\MyConfiguration.ps1 -ConfigurationArchivePath .\MyConfiguration.ps1.zip