AttributeError: 'Server' object has no attribute 'cluster'

[Alwin-Stockinger]

Describe the bug

Using the cli to start a migration fails with an error AttributeError: 'Server' object has no attribute 'cluster'

Related command

az postgres flexible-server migration create --properties "config.json" --subscription "xxx" --resource-group "xxx" --name "xxx" --migration-name "migration1"

Errors

The command failed with an unexpected error. Here is the traceback:
'Server' object has no attribute 'cluster'
Traceback (most recent call last):
  File "/nix/store/nryrqg7vlyljzz8brqxdyfqk01wa6sc8-python3.13-knack-0.12.0/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
    cmd_result = self.invocation.execute(args)
  File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 666, in execute
    raise ex
  File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 734, in _run_jobs_serially
    results.append(self._run_job(expanded_arg, cmd_copy))
                   ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 703, in _run_job
    result = cmd_copy(params)
  File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 336, in __call__
    return self.handler(*args, **kwargs)
           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
    return op(**command_args)
  File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/flexible_server_custom_postgres.py", line 1326, in migration_create_func
    validate_citus_cluster(cmd, resource_group_name, server_name)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 859, in validate_citus_cluster
    if is_citus_cluster(cmd, resource_group_name, server_name):
       ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 855, in is_citus_cluster
    return server.cluster and server.cluster.cluster_size > 0
           ^^^^^^^^^^^^^^
AttributeError: 'Server' object has no attribute 'cluster'

Issue script & Debug output

DEBUG: cli.knack.cli: Command arguments: ['postgres', 'flexible-server', 'migration', 'create', '--properties', 'config.json', '--subscription', 'xxx', '--resource-group', 'xxx', '--name', 'xxx', '--migration-name', 'migration1', '--debug']
DEBUG: cli.knack.cli: init debug log:
Cannot enable color.
DEBUG: cli.knack.cli: Event: Cli.PreExecute []
DEBUG: cli.knack.cli: Event: CommandParser.OnGlobalArgumentsCreate [<function CLILogging.on_global_arguments at 0x100e62f20>, <function OutputProducer.on_global_arguments at 0x1010549a0>, <function CLIQuery.on_global_arguments at 0x10106ede0>]
DEBUG: cli.knack.cli: Event: CommandInvoker.OnPreCommandTableCreate []
DEBUG: cli.azure.cli.core: Command index version or cloud profile is invalid or doesn't match the current command.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core: Command index has been invalidated.
DEBUG: cli.azure.cli.core: No module found from index for '['postgres', 'flexible-server', 'migration', 'create', '--properties', 'config.json', '--subscription', 'xxx', '--resource-group', 'xxx', '--name', 'xxx', '--migration-name', 'migration1', '--debug']'
DEBUG: cli.azure.cli.core: Loading all modules and extensions
DEBUG: cli.azure.cli.core: Discovered command modules: ['acr', 'acs', 'advisor', 'ams', 'apim', 'appconfig', 'appservice', 'aro', 'backup', 'batch', 'batchai', 'billing', 'botservice', 'cdn', 'cloud', 'cognitiveservices', 'compute_recommender', 'computefleet', 'config', 'configure', 'consumption', 'container', 'containerapp', 'cosmosdb', 'databoxedge', 'dls', 'dms', 'eventgrid', 'eventhubs', 'extension', 'feedback', 'find', 'hdinsight', 'identity', 'interactive', 'iot', 'keyvault', 'lab', 'managedservices', 'maps', 'marketplaceordering', 'monitor', 'mysql', 'netappfiles', 'network', 'policyinsights', 'privatedns', 'profile', 'rdbms', 'redis', 'relay', 'resource', 'role', 'search', 'security', 'servicebus', 'serviceconnector', 'servicefabric', 'signalr', 'sql', 'sqlvm', 'storage', 'synapse', 'util', 'vm']
DEBUG: cli.azure.cli.core: Loading command modules:
DEBUG: cli.azure.cli.core: Name Load Time Groups Commands
DEBUG: cli.azure.cli.core: acr 0.122 36 149
DEBUG: cli.azure.cli.core: acs 0.029 15 79
DEBUG: cli.azure.cli.core: advisor 0.001 3 6
DEBUG: cli.azure.cli.core: ams 0.003 22 100
DEBUG: cli.azure.cli.core: apim 0.004 14 69
DEBUG: cli.azure.cli.core: appconfig 0.002 9 47
DEBUG: cli.azure.cli.core: appservice 0.017 80 277
DEBUG: cli.azure.cli.core: aro 0.010 1 10
DEBUG: cli.azure.cli.core: backup 0.003 16 60
DEBUG: cli.azure.cli.core: batch 0.024 32 96
DEBUG: cli.azure.cli.core: batchai 0.003 10 30
DEBUG: cli.azure.cli.core: billing 0.016 20 53
DEBUG: cli.azure.cli.core: botservice 0.003 12 42
/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/aaz/_command.py:132: FutureWarning: functools.partial will be a method descriptor in future Python versions; wrap it in staticmethod() if you want to preserve the old behavior
if self.AZ_PREVIEW_INFO:
/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/aaz/_command.py:133: FutureWarning: functools.partial will be a method descriptor in future Python versions; wrap it in staticmethod() if you want to preserve the old behavior
self.preview_info = self.AZ_PREVIEW_INFO(cli_ctx=self.cli_ctx)
DEBUG: cli.azure.cli.core: cdn 0.124 8 50
DEBUG: cli.azure.cli.core: cloud 0.001 1 7
DEBUG: cli.azure.cli.core: cognitiveservices 0.002 10 33
/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/aaz/_command.py:50: FutureWarning: functools.partial will be a method descriptor in future Python versions; wrap it in staticmethod() if you want to preserve the old behavior
if self.AZ_PREVIEW_INFO:
/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/aaz/_command.py:51: FutureWarning: functools.partial will be a method descriptor in future Python versions; wrap it in staticmethod() if you want to preserve the old behavior
self.group_kwargs['preview_info'] = self.AZ_PREVIEW_INFO(cli_ctx=self.cli_ctx)
DEBUG: cli.azure.cli.core: compute_recommender 0.003 1 1
DEBUG: cli.azure.cli.core: computefleet 0.007 1 1
DEBUG: cli.azure.cli.core: config 0.001 2 7
DEBUG: cli.azure.cli.core: configure 0.001 2 5
DEBUG: cli.azure.cli.core: consumption 0.014 8 9
DEBUG: cli.azure.cli.core: container 0.007 2 17
DEBUG: cli.azure.cli.core: containerapp 0.075 37 123
DEBUG: cli.azure.cli.core: cosmosdb 0.008 58 200
DEBUG: cli.azure.cli.core: databoxedge 0.006 5 28
DEBUG: cli.azure.cli.core: dls 0.002 6 36
DEBUG: cli.azure.cli.core: dms 0.002 3 22
DEBUG: cli.azure.cli.core: eventgrid 0.002 25 96
DEBUG: cli.azure.cli.core: eventhubs 0.012 14 21
DEBUG: cli.azure.cli.core: extension 0.001 1 7
DEBUG: cli.azure.cli.core: feedback 0.001 1 2
DEBUG: cli.azure.cli.core: find 0.001 1 1
DEBUG: cli.azure.cli.core: hdinsight 0.006 9 42
DEBUG: cli.azure.cli.core: identity 0.006 2 7
DEBUG: cli.azure.cli.core: interactive 0.000 1 1
DEBUG: cli.azure.cli.core: iot 0.055 19 82
DEBUG: cli.azure.cli.core: keyvault 0.004 20 114
DEBUG: cli.azure.cli.core: lab 0.024 9 30
DEBUG: cli.azure.cli.core: managedservices 0.008 3 8
DEBUG: cli.azure.cli.core: maps 0.001 5 13
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DEBUG: cli.azure.cli.core: mysql 0.044 16 56
DEBUG: cli.azure.cli.core: netappfiles 0.025 8 15
DEBUG: cli.azure.cli.core: network 0.078 106 351
DEBUG: cli.azure.cli.core: policyinsights 0.010 9 17
DEBUG: cli.azure.cli.core: privatedns 0.015 14 60
DEBUG: cli.azure.cli.core: profile 0.001 2 8
DEBUG: cli.azure.cli.core: rdbms 0.051 52 217
DEBUG: cli.azure.cli.core: redis 0.002 7 38
DEBUG: cli.azure.cli.core: relay 0.019 7 8
DEBUG: cli.azure.cli.core: resource 0.009 52 232
DEBUG: cli.azure.cli.core: role 0.001 17 62
DEBUG: cli.azure.cli.core: search 0.006 7 19
DEBUG: cli.azure.cli.core: security 0.007 48 98
DEBUG: cli.azure.cli.core: servicebus 0.007 13 16
DEBUG: cli.azure.cli.core: serviceconnector 0.012 20 331
DEBUG: cli.azure.cli.core: servicefabric 0.010 27 80
DEBUG: cli.azure.cli.core: signalr 0.002 10 42
DEBUG: cli.azure.cli.core: sql 0.008 56 215
DEBUG: cli.azure.cli.core: sqlvm 0.022 4 20
DEBUG: cli.azure.cli.core: storage 0.023 60 275
DEBUG: cli.azure.cli.core: synapse 0.006 54 246
DEBUG: cli.azure.cli.core: util 0.001 3 7
DEBUG: cli.azure.cli.core: vm 0.075 59 213
DEBUG: cli.azure.cli.core: Total (65) 1.377 1193 4673
DEBUG: cli.azure.cli.core: Loaded 1179 groups, 4673 commands.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core._session: Skipping update of file /nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/etc/azure/commandIndex.json due to immutable directory.
DEBUG: cli.azure.cli.core: Updated command index in 0.001 seconds.
DEBUG: cli.knack.cli: Event: CommandInvoker.OnPreCommandTableTruncate [<function AzCliLogging.init_command_file_logging at 0x102d19080>]
DEBUG: cli.azure.cli.core.azlogging: metadata file logging enabled - writing logs to '/Users/xxx/.azure/commands/2025-08-21.07-59-02.postgres_flexible-server_migration_create.76308.log'.
INFO: az_command_data_logger: command args: postgres flexible-server migration create --properties {} --subscription {} --resource-group {} --name {} --migration-name {} --debug
DEBUG: cli.knack.cli: Event: CommandInvoker.OnPreArgumentLoad [<function register_global_subscription_argument..add_subscription_parameter at 0x102d52fc0>]
DEBUG: cli.knack.cli: Event: CommandInvoker.OnPostArgumentLoad []
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DEBUG: cli.azure.cli.core.commands.client_factory: Getting management service client client_type=PostgreSQLManagementClient
DEBUG: cli.azure.cli.core.auth.persistence: build_persistence: location='/Users/xxx/.azure/msal_token_cache.json', encrypt=False
DEBUG: cli.azure.cli.core.auth.binary_cache: load: /Users/xxx/.azure/msal_http_cache.bin
DEBUG: urllib3.util.retry: Converted retries value: 1 -> Retry(total=1, connect=None, read=None, redirect=None, status=None)
DEBUG: msal.authority: Initializing with Entra authority: https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34
DEBUG: msal.authority: openid_config("https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/v2.0/.well-known/openid-configuration") = {'token_endpoint': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/oauth2/v2.0/token', 'token_endpoint_auth_methods_supported': ['client_secret_post', 'private_key_jwt', 'client_secret_basic'], 'jwks_uri': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/discovery/v2.0/keys', 'response_modes_supported': ['query', 'fragment', 'form_post'], 'subject_types_supported': ['pairwise'], 'id_token_signing_alg_values_supported': ['RS256'], 'response_types_supported': ['code', 'id_token', 'code id_token', 'id_token token'], 'scopes_supported': ['openid', 'profile', 'email', 'offline_access'], 'issuer': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/v2.0', 'request_uri_parameter_supported': False, 'userinfo_endpoint': 'https://graph.microsoft.com/oidc/userinfo', 'authorization_endpoint': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/oauth2/v2.0/authorize', 'device_authorization_endpoint': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/oauth2/v2.0/devicecode', 'http_logout_supported': True, 'frontchannel_logout_supported': True, 'end_session_endpoint': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/oauth2/v2.0/logout', 'claims_supported': ['sub', 'iss', 'cloud_instance_name', 'cloud_instance_host_name', 'cloud_graph_host_name', 'msgraph_host', 'aud', 'exp', 'iat', 'auth_time', 'acr', 'nonce', 'preferred_username', 'name', 'tid', 'ver', 'at_hash', 'c_hash', 'email'], 'kerberos_endpoint': 'https://login.microsoftonline.com/9ce76d42-5ecb-4d8f-939b-a462ad28cf34/kerberos', 'tenant_region_scope': 'EU', 'cloud_instance_name': 'microsoftonline.com', 'cloud_graph_host_name': 'graph.windows.net', 'msgraph_host': 'graph.microsoft.com', 'rbac_url': 'https://pas.windows.net'}
DEBUG: msal.application: Broker enabled? None
DEBUG: cli.azure.cli.core.commands.client_factory: Getting management service client client_type=PostgreSQLManagementClient
DEBUG: urllib3.util.retry: Converted retries value: 1 -> Retry(total=1, connect=None, read=None, redirect=None, status=None)
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DEBUG: cli.azure.cli.core.sdk.policies: 'Date': 'Thu, 21 Aug 2025 05:59:02 GMT'
DEBUG: cli.azure.cli.core.sdk.policies: Response content:
DEBUG: cli.azure.cli.core.sdk.policies: {"sku":{"name":"Standard_D2ds_v5","tier":"GeneralPurpose"},"systemData":{"createdAt":"2025-05-09T08:59:22.3698075Z"},"properties":{"replica":{"role":"Primary","capacity":5},"storage":{"type":"","iops":500,"tier":"P10","storageSizeGB":128,"autoGrow":"Enabled"},"network":{"publicNetworkAccess":"Disabled","delegatedSubnetResourceId":"/subscriptions/3d1204f0-3ee7-4884-a039-4bcaa9eca23f/resourceGroups/xxx/providers/Microsoft.Network/virtualNetworks/xxx/subnets/snet-pgflex","privateDnsZoneArmResourceId":"/subscriptions/db640e2d-57b9-44fb-a684-2fa23bdf7344/resourceGroups/rg-platform-shared-network/providers/Microsoft.Network/privateDnsZones/privatelink.postgres.database.azure.com"},"dataEncryption":{"type":"SystemManaged"},"authConfig":{"activeDirectoryAuth":"Disabled","passwordAuth":"Enabled"},"fullyQualifiedDomainName":"xxx.postgres.database.azure.com","version":"15","minorVersion":"13","administratorLogin":"dba","state":"Ready","availabilityZone":"2","backup":{"backupRetentionDays":14,"geoRedundantBackup":"Disabled","earliestRestoreDate":"2025-08-07T10:15:23.9342697+00:00"},"highAvailability":{"mode":"Disabled","state":"NotEnabled"},"maintenanceWindow":{"customWindow":"Disabled","dayOfWeek":0,"startHour":0,"startMinute":0},"replicationRole":"Primary","replicaCapacity":5},"location":"Germany West Central","tags":{"Type":"Dev"},"id":"/subscriptions/3d1204f0-3ee7-4884-a039-4bcaa9eca23f/resourceGroups/xxx/providers/Microsoft.DBforPostgreSQL/flexibleServers/xxx","name":"xxx","type":"Microsoft.DBforPostgreSQL/flexibleServers"}
DEBUG: cli.azure.cli.core.azclierror: Traceback (most recent call last):
File "/nix/store/nryrqg7vlyljzz8brqxdyfqk01wa6sc8-python3.13-knack-0.12.0/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 666, in execute
raise ex
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 703, in _run_job
result = cmd_copy(params)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 336, in call
return self.handler(*args, **kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
return op(**command_args)
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/flexible_server_custom_postgres.py", line 1326, in migration_create_func
validate_citus_cluster(cmd, resource_group_name, server_name)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 859, in validate_citus_cluster
if is_citus_cluster(cmd, resource_group_name, server_name):
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 855, in is_citus_cluster
return server.cluster and server.cluster.cluster_size > 0
^^^^^^^^^^^^^^
AttributeError: 'Server' object has no attribute 'cluster'

ERROR: cli.azure.cli.core.azclierror: The command failed with an unexpected error. Here is the traceback:
ERROR: az_command_data_logger: The command failed with an unexpected error. Here is the traceback:
ERROR: cli.azure.cli.core.azclierror: 'Server' object has no attribute 'cluster'
Traceback (most recent call last):
File "/nix/store/nryrqg7vlyljzz8brqxdyfqk01wa6sc8-python3.13-knack-0.12.0/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 666, in execute
raise ex
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 703, in _run_job
result = cmd_copy(params)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 336, in call
return self.handler(*args, **kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
return op(**command_args)
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/flexible_server_custom_postgres.py", line 1326, in migration_create_func
validate_citus_cluster(cmd, resource_group_name, server_name)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 859, in validate_citus_cluster
if is_citus_cluster(cmd, resource_group_name, server_name):
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 855, in is_citus_cluster
return server.cluster and server.cluster.cluster_size > 0
^^^^^^^^^^^^^^
AttributeError: 'Server' object has no attribute 'cluster'
ERROR: az_command_data_logger: 'Server' object has no attribute 'cluster'
Traceback (most recent call last):
File "/nix/store/nryrqg7vlyljzz8brqxdyfqk01wa6sc8-python3.13-knack-0.12.0/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 666, in execute
raise ex
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 703, in _run_job
result = cmd_copy(params)
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 336, in call
return self.handler(*args, **kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/nix/store/9misx6nwrpccj86zn7bvcjyc9jngllyv-python3.13-azure-cli-core-2.75.0/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
return op(**command_args)
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/flexible_server_custom_postgres.py", line 1326, in migration_create_func
validate_citus_cluster(cmd, resource_group_name, server_name)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 859, in validate_citus_cluster
if is_citus_cluster(cmd, resource_group_name, server_name):
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/by3yg8n01c13drqn1ava74jz13qrh19h-python3.13-azure-cli-2.75.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/validators.py", line 855, in is_citus_cluster
return server.cluster and server.cluster.cluster_size > 0
^^^^^^^^^^^^^^
AttributeError: 'Server' object has no attribute 'cluster'
To check existing issues, please visit: https://github.com/Azure/azure-cli/issues
DEBUG: cli.knack.cli: Event: Cli.PostExecute [<function AzCliLogging.deinit_cmd_metadata_logging at 0x102d19300>]
INFO: az_command_data_logger: exit code: 1
INFO: cli.main: Command ran in 2.379 seconds (init: 0.302, invoke: 2.077)
INFO: telemetry.main: Begin splitting cli events and extra events, total events: 1
INFO: telemetry.client: Accumulated 0 events. Flush the clients.
INFO: telemetry.main: Finish splitting cli events and extra events, cli events: 1
INFO: telemetry.save: Save telemetry record of length 8371 in cache file under /Users/xxx/.azure/telemetry/20250821075903265
INFO: telemetry.main: Begin creating telemetry upload process.
INFO: telemetry.process: Creating upload process: "/nix/store/v72ywdz0dd2d6sb3knymx9ww8r6pcqba-python3-3.13.5/bin/python3.13 /nix/store/2yz9zf485fgx3rg38s1kqlzskjkmbkgv-python3.13-azure-cli-telemetry-1.1.0/lib/python3.13/site-packages/azure/cli/telemetry/init.py /Users/xxx/.azure /Users/xxx-stockinger/.azure/telemetry/20250821075903265"
INFO: telemetry.process: Return from creating process 76324
INFO: telemetry.main: Finish creating telemetry upload process.

Expected behavior

Not failing

Environment Summary

azure-cli 2.75.0 *

core 2.75.0 *
telemetry 1.1.0

Dependencies:
msal 1.32.3
azure-mgmt-resource 23.4.0

Python location '/nix/store/v72ywdz0dd2d6sb3knymx9ww8r6pcqba-python3-3.13.5/bin/python3.13'
Config directory '/Users/xxx/.azure'
Extensions directory '/Users/xxx/.azure/cliextensions'

Python (Darwin) 3.13.5 (main, Jun 11 2025, 15:36:57) [Clang 19.1.7 ]

Legal docs and information: aka.ms/AzureCliLegal

Additional context

No response

[azure-client-tools-bot-prd]

Hi @Alwin-Stockinger,

2.75.0 is not the latest Azure CLI(2.76.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @gbowerman, @jasomaning, @nachoalonsoportillo.

[Alwin-Stockinger]

Hi @Alwin-Stockinger,

2.75.0 is not the latest Azure CLI(2.76.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

It was indeed a problem witht the version,
the new version throws a proper error that tells you whats wrong

[dszakallas]

I have a similar issue that I also face in the last version (2.78.0)

$ az postgres flexible-server list
The command failed with an unexpected error. Here is the traceback:
'Server' object has no attribute 'cluster'
Traceback (most recent call last):
  File "/nix/store/g30hm6551npp8lcb462ak2zw08pgdjmm-python3.13-knack-0.12.0/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
    cmd_result = self.invocation.execute(args)
  File "/nix/store/nq5g2drx5zzpncybs0nsc0sjw95jgcz1-python3.13-azure-cli-core-2.78.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 666, in execute
    raise ex
  File "/nix/store/nq5g2drx5zzpncybs0nsc0sjw95jgcz1-python3.13-azure-cli-core-2.78.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 734, in _run_jobs_serially
    results.append(self._run_job(expanded_arg, cmd_copy))
                   ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/nq5g2drx5zzpncybs0nsc0sjw95jgcz1-python3.13-azure-cli-core-2.78.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 703, in _run_job
    result = cmd_copy(params)
  File "/nix/store/nq5g2drx5zzpncybs0nsc0sjw95jgcz1-python3.13-azure-cli-core-2.78.0/lib/python3.13/site-packages/azure/cli/core/commands/__init__.py", line 336, in __call__
    return self.handler(*args, **kwargs)
           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/nix/store/nq5g2drx5zzpncybs0nsc0sjw95jgcz1-python3.13-azure-cli-core-2.78.0/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
    return op(**command_args)
  File "/nix/store/anfncx8wgyv4drrk1zk4kc4a0a9vfrdx-python3.13-azure-cli-2.78.0/lib/python3.13/site-packages/azure/cli/command_modules/rdbms/flexible_server_custom_common.py", line 61, in server_list_custom_func
    servers = [s for s in servers if s.cluster is None]
                                     ^^^^^^^^^
AttributeError: 'Server' object has no attribute 'cluster'
To check existing issues, please visit: https://github.com/Azure/azure-cli/issues