community.general/lib/ansible/modules/cloud/azure/azure_rm_aks.py

830 lines
33 KiB
Python

#!/usr/bin/python
#
# Copyright (c) 2018 Sertac Ozercan, <seozerca@microsoft.com>
#
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'}
DOCUMENTATION = '''
---
module: azure_rm_aks
version_added: "2.6"
short_description: Manage a managed Azure Container Service (AKS) Instance.
description:
- Create, update and delete a managed Azure Container Service (AKS) Instance.
options:
resource_group:
description:
- Name of a resource group where the managed Azure Container Services (AKS) exists or will be created.
required: true
name:
description:
- Name of the managed Azure Container Services (AKS) instance.
required: true
state:
description:
- Assert the state of the AKS. Use C(present) to create or update an AKS and C(absent) to delete it.
default: present
choices:
- absent
- present
location:
description:
- Valid azure location. Defaults to location of the resource group.
dns_prefix:
description:
- DNS prefix specified when creating the managed cluster.
kubernetes_version:
description:
- Version of Kubernetes specified when creating the managed cluster.
linux_profile:
description:
- The linux profile suboptions.
suboptions:
admin_username:
description:
- The Admin Username for the Cluster.
required: true
ssh_key:
description:
- The Public SSH Key used to access the cluster.
required: true
agent_pool_profiles:
description:
- The agent pool profile suboptions.
suboptions:
name:
description:
- Unique name of the agent pool profile in the context of the subscription and resource group.
required: true
count:
description:
- Number of agents (VMs) to host docker containers.
- Allowed values must be in the range of 1 to 100 (inclusive).
required: true
vm_size:
description:
- The VM Size of each of the Agent Pool VM's (e.g. Standard_F1 / Standard_D2v2).
required: true
os_disk_size_gb:
description:
- Size of the OS disk.
service_principal:
description:
- The service principal suboptions.
suboptions:
client_id:
description:
- The ID for the Service Principal.
required: true
client_secret:
description:
- The secret password associated with the service principal.
required: true
enable_rbac:
description:
- Enable RBAC.
- Existing non-RBAC enabled AKS clusters cannot currently be updated for RBAC use.
type: bool
default: no
version_added: 2.8
network_profile:
description:
- Profile of network configuration.
suboptions:
network_plugin:
description:
- Network plugin used for building Kubernetes network.
- This property cannot been changed.
- With C(kubenet), nodes get an IP address from the Azure virtual network subnet.
- AKS features such as Virtual Nodes or network policies aren't supported with C(kubenet).
- C(azure) enables Azure Container Networking Interface(CNI), every pod gets an IP address from the subnet and can be accessed directly.
choices:
- azure
- kubenet
network_policy:
description: Network policy used for building Kubernetes network.
pod_cidr:
description:
- A CIDR notation IP range from which to assign pod IPs when kubenet is used.
- It should be a large address space that isn't in use elsewhere in your network environment.
- This address range must be large enough to accommodate the number of nodes that you expect to scale up to.
service_cidr:
description:
- A CIDR notation IP range from which to assign service cluster IPs.
- It must not overlap with any Subnet IP ranges.
- It should be the *.10 address of your service IP address range.
dns_service_ip:
description:
- An IP address assigned to the Kubernetes DNS service.
- It must be within the Kubernetes service address range specified in serviceCidr.
docker_bridge_cidr:
description:
- A CIDR notation IP range assigned to the Docker bridge network.
- It must not overlap with any Subnet IP ranges or the Kubernetes service address range.
version_added: 2.8
aad_profile:
description:
- Profile of Azure Active Directory configuration.
suboptions:
client_app_id:
description: The client AAD application ID.
server_app_id:
description: The server AAD application ID.
server_app_secret:
description: The server AAD application secret.
tenant_id:
description:
- The AAD tenant ID to use for authentication.
- If not specified, will use the tenant of the deployment subscription.
version_added: 2.8
addon:
description:
- Profile of managed cluster add-on.
- Key can be C(http_application_routing), C(monitoring), C(virtual_node).
- Value must be a dict contains a bool variable C(enabled).
type: dict
suboptions:
http_application_routing:
description:
- The HTTP application routing solution makes it easy to access applications that are deployed to your cluster.
type: dict
suboptions:
enabled:
description:
- Whether the solution enabled.
type: bool
monitoring:
description:
- It gives you performance visibility by collecting memory and processor metrics from controllers, nodes,
and containers that are available in Kubernetes through the Metrics API.
type: dict
suboptions:
enabled:
description:
- Whether the solution enabled.
type: bool
log_analytics_workspace_resource_id:
description:
- Where to store the container metrics.
virtual_node:
description:
- With virtual nodes, you have quick provisioning of pods, and only pay per second for their execution time.
- You don't need to wait for Kubernetes cluster autoscaler to deploy VM compute nodes to run the additional pods.
type: dict
suboptions:
enabled:
description:
- Whether the solution enabled.
type: bool
subnet_resource_id:
description:
- Subnet associdated to the cluster.
version_added: 2.8
extends_documentation_fragment:
- azure
- azure_tags
author:
- "Sertac Ozercan (@sozercan)"
- "Yuwei Zhou (@yuwzho)"
'''
EXAMPLES = '''
- name: Create a managed Azure Container Services (AKS) instance
azure_rm_aks:
name: acctestaks1
location: eastus
resource_group: myResourceGroup
dns_prefix: akstest
linux_profile:
admin_username: azureuser
ssh_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...
service_principal:
client_id: "cf72ca99-f6b9-4004-b0e0-bee10c521948"
client_secret: "mySPNp@ssw0rd!"
agent_pool_profiles:
- name: default
count: 5
vm_size: Standard_D2_v2
tags:
Environment: Production
- name: Remove a managed Azure Container Services (AKS) instance
azure_rm_aks:
name: acctestaks3
resource_group: myResourceGroup
state: absent
'''
RETURN = '''
state:
description: Current state of the Azure Container Service (AKS)
returned: always
type: dict
example:
agent_pool_profiles:
- count: 1
dns_prefix: Null
name: default
os_disk_size_gb: Null
os_type: Linux
ports: Null
storage_profile: ManagedDisks
vm_size: Standard_DS1_v2
vnet_subnet_id: Null
changed: false
dns_prefix: aks9860bdcd89
id: "/subscriptions/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX/resourcegroups/yuwzhoaks/providers/Microsoft.ContainerService/managedClusters/aks9860bdc"
kube_config: "......"
kubernetes_version: 1.11.4
linux_profile:
admin_username: azureuser
ssh_key: ssh-rsa AAAAB3NzaC1yc2EAAAADA.....
location: eastus
name: aks9860bdc
provisioning_state: Succeeded
service_principal_profile:
client_id: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
tags: {}
type: Microsoft.ContainerService/ManagedClusters
'''
from ansible.module_utils.azure_rm_common import AzureRMModuleBase
try:
from msrestazure.azure_exceptions import CloudError
except ImportError:
# This is handled in azure_rm_common
pass
def create_aks_dict(aks):
'''
Helper method to deserialize a ContainerService to a dict
:param: aks: ContainerService or AzureOperationPoller with the Azure callback object
:return: dict with the state on Azure
'''
return dict(
id=aks.id,
name=aks.name,
location=aks.location,
dns_prefix=aks.dns_prefix,
kubernetes_version=aks.kubernetes_version,
tags=aks.tags,
linux_profile=create_linux_profile_dict(aks.linux_profile),
service_principal_profile=create_service_principal_profile_dict(
aks.service_principal_profile),
provisioning_state=aks.provisioning_state,
agent_pool_profiles=create_agent_pool_profiles_dict(
aks.agent_pool_profiles),
type=aks.type,
kube_config=aks.kube_config,
enable_rbac=aks.enable_rbac,
network_profile=create_network_profiles_dict(aks.network_profile),
aad_profile=create_aad_profiles_dict(aks.aad_profile),
addon=create_addon_dict(aks.addon_profiles),
fqdn=aks.fqdn,
node_resource_group=aks.node_resource_group
)
def create_network_profiles_dict(network):
return dict(
network_plugin=network.network_plugin,
network_policy=network.network_policy,
pod_cidr=network.pod_cidr,
service_cidr=network.service_cidr,
dns_service_ip=network.dns_service_ip,
docker_bridge_cidr=network.docker_bridge_cidr
) if network else dict()
def create_aad_profiles_dict(aad):
return aad.as_dict() if aad else dict()
def create_addon_dict(addon):
result = dict()
addon = addon or dict()
for key in addon.keys():
result[key] = addon[key].config
result[key]['enabled'] = addon[key].enabled
return result
def create_linux_profile_dict(linuxprofile):
'''
Helper method to deserialize a ContainerServiceLinuxProfile to a dict
:param: linuxprofile: ContainerServiceLinuxProfile with the Azure callback object
:return: dict with the state on Azure
'''
return dict(
ssh_key=linuxprofile.ssh.public_keys[0].key_data,
admin_username=linuxprofile.admin_username
)
def create_service_principal_profile_dict(serviceprincipalprofile):
'''
Helper method to deserialize a ContainerServiceServicePrincipalProfile to a dict
Note: For security reason, the service principal secret is skipped on purpose.
:param: serviceprincipalprofile: ContainerServiceServicePrincipalProfile with the Azure callback object
:return: dict with the state on Azure
'''
return dict(
client_id=serviceprincipalprofile.client_id
)
def create_agent_pool_profiles_dict(agentpoolprofiles):
'''
Helper method to deserialize a ContainerServiceAgentPoolProfile to a dict
:param: agentpoolprofiles: ContainerServiceAgentPoolProfile with the Azure callback object
:return: dict with the state on Azure
'''
return [dict(
count=profile.count,
vm_size=profile.vm_size,
name=profile.name,
os_disk_size_gb=profile.os_disk_size_gb,
storage_profile=profile.storage_profile,
vnet_subnet_id=profile.vnet_subnet_id,
os_type=profile.os_type
) for profile in agentpoolprofiles] if agentpoolprofiles else None
def create_addon_profiles_spec():
'''
Helper method to parse the ADDONS dictionary and generate the addon spec
'''
spec = dict()
for key in ADDONS.keys():
values = ADDONS[key]
addon_spec = dict(
enabled=dict(type='bool', default=True)
)
configs = values.get('config') or {}
for item in configs.keys():
addon_spec[item] = dict(type='str', aliases=[configs[item]], required=True)
spec[key] = dict(type='dict', options=addon_spec, aliases=[values['name']])
return spec
ADDONS = {
'http_application_routing': dict(name='httpApplicationRouting'),
'monitoring': dict(name='omsagent', config={'log_analytics_workspace_resource_id': 'logAnalyticsWorkspaceResourceID'}),
'virtual_node': dict(name='aciConnector', config={'subnet_resource_id': 'SubnetName'})
}
linux_profile_spec = dict(
admin_username=dict(type='str', required=True),
ssh_key=dict(type='str', required=True)
)
service_principal_spec = dict(
client_id=dict(type='str', required=True),
client_secret=dict(type='str', no_log=True)
)
agent_pool_profile_spec = dict(
name=dict(type='str', required=True),
count=dict(type='int', required=True),
vm_size=dict(type='str', required=True),
os_disk_size_gb=dict(type='int'),
dns_prefix=dict(type='str'),
ports=dict(type='list', elements='int'),
storage_profiles=dict(type='str', choices=[
'StorageAccount', 'ManagedDisks']),
vnet_subnet_id=dict(type='str'),
os_type=dict(type='str', choices=['Linux', 'Windows'])
)
network_profile_spec = dict(
network_plugin=dict(type='str', choices=['azure', 'kubenet']),
network_policy=dict(type='str'),
pod_cidr=dict(type='str'),
service_cidr=dict(type='str'),
dns_service_ip=dict(type='str'),
docker_bridge_cidr=dict(type='str')
)
aad_profile_spec = dict(
client_app_id=dict(type='str'),
server_app_id=dict(type='str'),
server_app_secret=dict(type='str', no_log=True),
tenant_id=dict(type='str')
)
class AzureRMManagedCluster(AzureRMModuleBase):
"""Configuration class for an Azure RM container service (AKS) resource"""
def __init__(self):
self.module_arg_spec = dict(
resource_group=dict(
type='str',
required=True
),
name=dict(
type='str',
required=True
),
state=dict(
type='str',
default='present',
choices=['present', 'absent']
),
location=dict(
type='str'
),
dns_prefix=dict(
type='str'
),
kubernetes_version=dict(
type='str'
),
linux_profile=dict(
type='dict',
options=linux_profile_spec
),
agent_pool_profiles=dict(
type='list',
elements='dict',
options=agent_pool_profile_spec
),
service_principal=dict(
type='dict',
options=service_principal_spec
),
enable_rbac=dict(
type='bool',
default=False
),
network_profile=dict(
type='dict',
options=network_profile_spec
),
aad_profile=dict(
type='dict',
options=aad_profile_spec
),
addon=dict(
type='dict',
options=create_addon_profiles_spec()
)
)
self.resource_group = None
self.name = None
self.location = None
self.dns_prefix = None
self.kubernetes_version = None
self.tags = None
self.state = None
self.linux_profile = None
self.agent_pool_profiles = None
self.service_principal = None
self.enable_rbac = False
self.network_profile = None
self.aad_profile = None
self.addon = None
required_if = [
('state', 'present', [
'dns_prefix', 'linux_profile', 'agent_pool_profiles', 'service_principal'])
]
self.results = dict(changed=False)
super(AzureRMManagedCluster, self).__init__(derived_arg_spec=self.module_arg_spec,
supports_check_mode=True,
supports_tags=True,
required_if=required_if)
def exec_module(self, **kwargs):
"""Main module execution method"""
for key in list(self.module_arg_spec.keys()) + ['tags']:
setattr(self, key, kwargs[key])
resource_group = None
to_be_updated = False
update_tags = False
resource_group = self.get_resource_group(self.resource_group)
if not self.location:
self.location = resource_group.location
response = self.get_aks()
# Check if the AKS instance already present in the RG
if self.state == 'present':
# For now Agent Pool cannot be more than 1, just remove this part in the future if it change
agentpoolcount = len(self.agent_pool_profiles)
if agentpoolcount > 1:
self.fail('You cannot specify more than one agent_pool_profiles currently')
available_versions = self.get_all_versions()
if self.kubernetes_version not in available_versions.keys():
self.fail("Unsupported kubernetes version. Excepted one of {0} but get {1}".format(available_versions.keys(), self.kubernetes_version))
if not response:
to_be_updated = True
else:
self.results = response
self.results['changed'] = False
self.log('Results : {0}'.format(response))
update_tags, response['tags'] = self.update_tags(response['tags'])
if response['provisioning_state'] == "Succeeded":
def is_property_changed(profile, property, ignore_case=False):
base = response[profile].get(property)
new = getattr(self, profile).get(property)
if ignore_case:
return base.lower() != new.lower()
else:
return base != new
# Cannot Update the SSH Key for now // Let service to handle it
if is_property_changed('linux_profile', 'ssh_key'):
self.log(("Linux Profile Diff SSH, Was {0} / Now {1}"
.format(response['linux_profile']['ssh_key'], self.linux_profile.get('ssh_key'))))
to_be_updated = True
# self.module.warn("linux_profile.ssh_key cannot be updated")
# self.log("linux_profile response : {0}".format(response['linux_profile'].get('admin_username')))
# self.log("linux_profile self : {0}".format(self.linux_profile[0].get('admin_username')))
# Cannot Update the Username for now // Let service to handle it
if is_property_changed('linux_profile', 'admin_username'):
self.log(("Linux Profile Diff User, Was {0} / Now {1}"
.format(response['linux_profile']['admin_username'], self.linux_profile.get('admin_username'))))
to_be_updated = True
# self.module.warn("linux_profile.admin_username cannot be updated")
# Cannot have more that one agent pool profile for now
if len(response['agent_pool_profiles']) != len(self.agent_pool_profiles):
self.log("Agent Pool count is diff, need to updated")
to_be_updated = True
if response['kubernetes_version'] != self.kubernetes_version:
upgrade_versions = available_versions.get(response['kubernetes_version'])
if upgrade_versions and self.kubernetes_version not in upgrade_versions:
self.fail('Cannot upgrade kubernetes version to {0}, supported value are {1}'.format(self.kubernetes_version, upgrade_versions))
to_be_updated = True
if response['enable_rbac'] != self.enable_rbac:
to_be_updated = True
if self.network_profile:
for key in self.network_profile.keys():
original = response['network_profile'].get(key) or ''
if self.network_profile[key] and self.network_profile[key].lower() != original.lower():
to_be_updated = True
def compare_addon(origin, patch, config):
if not patch:
return True
if not origin:
return False
if origin['enabled'] != patch['enabled']:
return False
config = config or dict()
for key in config.keys():
if origin.get(config[key]) != patch.get(key):
return False
return True
if self.addon:
for key in ADDONS.keys():
addon_name = ADDONS[key]['name']
if not compare_addon(response['addon'].get(addon_name), self.addon.get(key), ADDONS[key].get('config')):
to_be_updated = True
for profile_result in response['agent_pool_profiles']:
matched = False
for profile_self in self.agent_pool_profiles:
if profile_result['name'] == profile_self['name']:
matched = True
os_disk_size_gb = profile_self.get('os_disk_size_gb') or profile_result['os_disk_size_gb']
if profile_result['count'] != profile_self['count'] \
or profile_result['vm_size'] != profile_self['vm_size'] \
or profile_result['os_disk_size_gb'] != os_disk_size_gb \
or profile_result['vnet_subnet_id'] != profile_self.get('vnet_subnet_id', profile_result['vnet_subnet_id']):
self.log(("Agent Profile Diff - Origin {0} / Update {1}".format(str(profile_result), str(profile_self))))
to_be_updated = True
if not matched:
self.log("Agent Pool not found")
to_be_updated = True
if to_be_updated:
self.log("Need to Create / Update the AKS instance")
if not self.check_mode:
self.results = self.create_update_aks()
self.log("Creation / Update done")
self.results['changed'] = True
elif update_tags:
self.log("Need to Update the AKS tags")
if not self.check_mode:
self.results['tags'] = self.update_aks_tags()
self.results['changed'] = True
return self.results
elif self.state == 'absent' and response:
self.log("Need to Delete the AKS instance")
self.results['changed'] = True
if self.check_mode:
return self.results
self.delete_aks()
self.log("AKS instance deleted")
return self.results
def create_update_aks(self):
'''
Creates or updates a managed Azure container service (AKS) with the specified configuration of agents.
:return: deserialized AKS instance state dictionary
'''
self.log("Creating / Updating the AKS instance {0}".format(self.name))
agentpools = []
if self.agent_pool_profiles:
agentpools = [self.create_agent_pool_profile_instance(profile) for profile in self.agent_pool_profiles]
service_principal_profile = self.create_service_principal_profile_instance(self.service_principal)
parameters = self.managedcluster_models.ManagedCluster(
location=self.location,
dns_prefix=self.dns_prefix,
kubernetes_version=self.kubernetes_version,
tags=self.tags,
service_principal_profile=service_principal_profile,
agent_pool_profiles=agentpools,
linux_profile=self.create_linux_profile_instance(self.linux_profile),
enable_rbac=self.enable_rbac,
network_profile=self.create_network_profile_instance(self.network_profile),
aad_profile=self.create_aad_profile_instance(self.aad_profile),
addon_profiles=self.create_addon_profile_instance(self.addon)
)
# self.log("service_principal_profile : {0}".format(parameters.service_principal_profile))
# self.log("linux_profile : {0}".format(parameters.linux_profile))
# self.log("ssh from yaml : {0}".format(results.get('linux_profile')[0]))
# self.log("ssh : {0}".format(parameters.linux_profile.ssh))
# self.log("agent_pool_profiles : {0}".format(parameters.agent_pool_profiles))
try:
poller = self.managedcluster_client.managed_clusters.create_or_update(self.resource_group, self.name, parameters)
response = self.get_poller_result(poller)
response.kube_config = self.get_aks_kubeconfig()
return create_aks_dict(response)
except CloudError as exc:
self.log('Error attempting to create the AKS instance.')
self.fail("Error creating the AKS instance: {0}".format(exc.message))
def update_aks_tags(self):
try:
poller = self.managedcluster_client.managed_clusters.update_tags(self.resource_group, self.name, self.tags)
response = self.get_poller_result(poller)
return response.tags
except CloudError as exc:
self.fail("Error attempting to update AKS tags: {0}".format(exc.message))
def delete_aks(self):
'''
Deletes the specified managed container service (AKS) in the specified subscription and resource group.
:return: True
'''
self.log("Deleting the AKS instance {0}".format(self.name))
try:
poller = self.managedcluster_client.managed_clusters.delete(self.resource_group, self.name)
self.get_poller_result(poller)
return True
except CloudError as e:
self.log('Error attempting to delete the AKS instance.')
self.fail("Error deleting the AKS instance: {0}".format(e.message))
return False
def get_aks(self):
'''
Gets the properties of the specified container service.
:return: deserialized AKS instance state dictionary
'''
self.log("Checking if the AKS instance {0} is present".format(self.name))
try:
response = self.managedcluster_client.managed_clusters.get(self.resource_group, self.name)
self.log("Response : {0}".format(response))
self.log("AKS instance : {0} found".format(response.name))
response.kube_config = self.get_aks_kubeconfig()
return create_aks_dict(response)
except CloudError:
self.log('Did not find the AKS instance.')
return False
def get_all_versions(self):
try:
result = dict()
response = self.containerservice_client.container_services.list_orchestrators(self.location, resource_type='managedClusters')
orchestrators = response.orchestrators
for item in orchestrators:
result[item.orchestrator_version] = [x.orchestrator_version for x in item.upgrades] if item.upgrades else []
return result
except Exception as exc:
self.fail('Error when getting AKS supported kubernetes version list for location {0} - {1}'.format(self.location, exc.message or str(exc)))
def get_aks_kubeconfig(self):
'''
Gets kubeconfig for the specified AKS instance.
:return: AKS instance kubeconfig
'''
access_profile = self.managedcluster_client.managed_clusters.get_access_profile(resource_group_name=self.resource_group,
resource_name=self.name,
role_name="clusterUser")
return access_profile.kube_config.decode('utf-8')
def create_agent_pool_profile_instance(self, agentpoolprofile):
'''
Helper method to serialize a dict to a ManagedClusterAgentPoolProfile
:param: agentpoolprofile: dict with the parameters to setup the ManagedClusterAgentPoolProfile
:return: ManagedClusterAgentPoolProfile
'''
return self.managedcluster_models.ManagedClusterAgentPoolProfile(**agentpoolprofile)
def create_service_principal_profile_instance(self, spnprofile):
'''
Helper method to serialize a dict to a ManagedClusterServicePrincipalProfile
:param: spnprofile: dict with the parameters to setup the ManagedClusterServicePrincipalProfile
:return: ManagedClusterServicePrincipalProfile
'''
return self.managedcluster_models.ManagedClusterServicePrincipalProfile(
client_id=spnprofile['client_id'],
secret=spnprofile['client_secret']
)
def create_linux_profile_instance(self, linuxprofile):
'''
Helper method to serialize a dict to a ContainerServiceLinuxProfile
:param: linuxprofile: dict with the parameters to setup the ContainerServiceLinuxProfile
:return: ContainerServiceLinuxProfile
'''
return self.managedcluster_models.ContainerServiceLinuxProfile(
admin_username=linuxprofile['admin_username'],
ssh=self.managedcluster_models.ContainerServiceSshConfiguration(public_keys=[
self.managedcluster_models.ContainerServiceSshPublicKey(key_data=str(linuxprofile['ssh_key']))])
)
def create_network_profile_instance(self, network):
return self.managedcluster_models.ContainerServiceNetworkProfile(**network) if network else None
def create_aad_profile_instance(self, aad):
return self.managedcluster_models.ManagedClusterAADProfile(**aad) if aad else None
def create_addon_profile_instance(self, addon):
result = dict()
addon = addon or {}
for key in addon.keys():
if not ADDONS.get(key):
self.fail('Unsupported addon {0}'.format(key))
if addon.get(key):
name = ADDONS[key]['name']
config_spec = ADDONS[key].get('config') or dict()
config = addon[key]
for v in config_spec.keys():
config[config_spec[v]] = config[v]
result[name] = self.managedcluster_models.ManagedClusterAddonProfile(config=config, enabled=config['enabled'])
return result
def main():
"""Main execution"""
AzureRMManagedCluster()
if __name__ == '__main__':
main()