add Walle opensource adapter

5 files changed, 704 insertions, 625 deletions

diff --git a/ydb/tools/cfg/base.py b/ydb/tools/cfg/base.py
index 3bf9c8a0a8..63d1cbdf97 100644
--- a/ydb/tools/cfg/base.py
+++ b/ydb/tools/cfg/base.py
@@ -266,7 +266,7 @@ def normalize_domain(domain_name):
 class ClusterDetailsProvider(object):
     def __init__(self, template, walle_provider, validator=None, database=None):
         if not validator:
-            validator = validation.Validator()
+            validator = validation.default_validator()
 
         self.__validator = validator
 
diff --git a/ydb/tools/cfg/bin/__main__.py b/ydb/tools/cfg/bin/__main__.py
index a4c6156311..c76379907f 100644
--- a/ydb/tools/cfg/bin/__main__.py
+++ b/ydb/tools/cfg/bin/__main__.py
@@ -11,24 +11,25 @@ from ydb.tools.cfg.configurator_setup import get_parser, parse_optional_argument
 from ydb.tools.cfg.dynamic import DynamicConfigGenerator
 from ydb.tools.cfg.static import StaticConfigGenerator
 from ydb.tools.cfg.utils import write_to_file
+from ydb.tools.cfg.walle import NopHostsInformationProvider, WalleHostsInformationProvider
 
 logging_config.dictConfig(
     {
-        'version': 1,
-        'formatters': {
-            'base': {
-                'format': '%(asctime)s - %(processName)s - %(name)s - %(levelname)s - %(message)s',
+        "version": 1,
+        "formatters": {
+            "base": {
+                "format": "%(asctime)s - %(processName)s - %(name)s - %(levelname)s - %(message)s",
             },
         },
-        'handlers': {
-            'console': {
-                'class': 'logging.StreamHandler',
-                'level': 'INFO',
-                'formatter': 'base',
-                'stream': sys.stdout,
+        "handlers": {
+            "console": {
+                "class": "logging.StreamHandler",
+                "level": "INFO",
+                "formatter": "base",
+                "stream": sys.stdout,
             },
         },
-        'root': {'formatter': 'base', 'level': 'INFO', 'handlers': ('console',)},
+        "root": {"formatter": "base", "level": "INFO", "handlers": ("console",)},
     }
 )
 
@@ -44,10 +45,14 @@ def cfg_generate(args):
     else:
         cfg_cls = StaticConfigGenerator
 
-    with open(args.cluster_description, 'r') as yaml_template:
+    with open(args.cluster_description, "r") as yaml_template:
         cluster_template = yaml.safe_load(yaml_template)
 
-    generator = cfg_cls(cluster_template, args.binary_path, args.output_dir, **kwargs)
+    hosts_provider = NopHostsInformationProvider()
+    if args.hosts_provider_url:
+        hosts_provider = WalleHostsInformationProvider(args.hosts_provider_url)
+
+    generator = cfg_cls(cluster_template, args.binary_path, args.output_dir, walle_provider=hosts_provider, **kwargs)
 
     all_configs = generator.get_all_configs()
     for cfg_name, cfg_value in all_configs.items():
@@ -55,10 +60,10 @@ def cfg_generate(args):
 
 
 def main():
-    parser = get_parser(cfg_generate)
+    parser = get_parser(cfg_generate, [{"name": "--hosts-provider-url", "help": "URL from which information about hosts can be obtained."}])
     args = parser.parse_args()
     args.func(args)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     exit(main())
diff --git a/ydb/tools/cfg/validation.py b/ydb/tools/cfg/validation.py
index c764e2b372..8923291264 100644
--- a/ydb/tools/cfg/validation.py
+++ b/ydb/tools/cfg/validation.py
@@ -8,9 +8,9 @@ from ydb.tools.cfg import utils
 from ydb.tools.cfg.types import Erasure, FailDomainType, LogLevels, NodeType, PDiskCategory
 
 KQP_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
     },
 }
 
@@ -18,28 +18,28 @@ KQP_SCHEMA = {
 # These profiles will be on top of channels.txt file so
 # user can influence on id of these profiles
 PROFILES = {
-    'type': 'array',
-    'items': {
-        'type': 'object',
-        'properties': {
-            'channels': {
-                'type': 'array',
-                'items': {
-                    'type': 'object',
-                    'properties': {
-                        'pdisk_type': {
-                            'type': 'string',
-                            'enum': PDiskCategory.all_pdisk_category_names(),
+    "type": "array",
+    "items": {
+        "type": "object",
+        "properties": {
+            "channels": {
+                "type": "array",
+                "items": {
+                    "type": "object",
+                    "properties": {
+                        "pdisk_type": {
+                            "type": "string",
+                            "enum": PDiskCategory.all_pdisk_category_names(),
                         },
-                        'erasure': {
-                            'type': 'string',
-                            'enum': Erasure.all_erasure_type_names(),
+                        "erasure": {
+                            "type": "string",
+                            "enum": Erasure.all_erasure_type_names(),
                         },
-                        'vdisk_kind': {
-                            'type': 'string',
+                        "vdisk_kind": {
+                            "type": "string",
                         },
-                        'storage_pool_kind': {
-                            'type': 'string',
+                        "storage_pool_kind": {
+                            "type": "string",
                         },
                     },
                     "additionalProperties": False,
@@ -52,111 +52,111 @@ PROFILES = {
 
 
 FEATURES_SCHEMA = {
-    'type': 'object',
-    'properties': {},
+    "type": "object",
+    "properties": {},
 }
 
 EXECUTOR_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'threads': {
-            'type': "integer",
-            'min': 1,
-        },
-        'spin_threshold': {
-            "type": 'integer',
+    "type": "object",
+    "properties": {
+        "threads": {
+            "type": "integer",
             "min": 1,
         },
-        'TimePerMailboxMicroSecs': {
-            'type': 'integer',
+        "spin_threshold": {
+            "type": "integer",
             "min": 1,
         },
-        'time_per_mailbox_micro_secs': {
-            'type': 'integer',
+        "TimePerMailboxMicroSecs": {
+            "type": "integer",
+            "min": 1,
+        },
+        "time_per_mailbox_micro_secs": {
+            "type": "integer",
             "min": 1,
         },
-        'max_threads': {
-            'type': 'integer',
-            'min': 1,
+        "max_threads": {
+            "type": "integer",
+            "min": 1,
         },
-        'priority': {
-            'type': 'integer',
-            'min': 1,
+        "priority": {
+            "type": "integer",
+            "min": 1,
         },
-        'max_avg_ping_deviation': {
-            'type': 'integer',
-            'min': 1,
+        "max_avg_ping_deviation": {
+            "type": "integer",
+            "min": 1,
         },
     },
 }
 
 SYS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'preset_name': {
-            'type': 'string',
-            'enum': utils.get_resources_list('resources/sys/'),
-        },
-        'executors': {
-            'type': 'object',
-            'properties': {
-                'system': copy.deepcopy(EXECUTOR_SCHEMA),
-                'batch': copy.deepcopy(EXECUTOR_SCHEMA),
-                'user': copy.deepcopy(EXECUTOR_SCHEMA),
-                'io': copy.deepcopy(EXECUTOR_SCHEMA),
-                'ic': copy.deepcopy(EXECUTOR_SCHEMA),
+    "type": "object",
+    "properties": {
+        "preset_name": {
+            "type": "string",
+            "enum": utils.get_resources_list("resources/sys/"),
+        },
+        "executors": {
+            "type": "object",
+            "properties": {
+                "system": copy.deepcopy(EXECUTOR_SCHEMA),
+                "batch": copy.deepcopy(EXECUTOR_SCHEMA),
+                "user": copy.deepcopy(EXECUTOR_SCHEMA),
+                "io": copy.deepcopy(EXECUTOR_SCHEMA),
+                "ic": copy.deepcopy(EXECUTOR_SCHEMA),
             },
-            'additionalProperties': False,
-        },
-        'scheduler': {
-            'type': 'object',
-            'properties': {
-                'resolution': {'type': 'integer'},
-                'spin_threshold': {'type': 'integer'},
-                'progress_threshold': {'type': 'integer'},
+            "additionalProperties": False,
+        },
+        "scheduler": {
+            "type": "object",
+            "properties": {
+                "resolution": {"type": "integer"},
+                "spin_threshold": {"type": "integer"},
+                "progress_threshold": {"type": "integer"},
             },
         },
-        'use_auto_config': {'type': 'boolean'},
-        'cpu_count': {'type': 'integer'},
-        'node_type': {
-            'type': 'string',
-            'enum': NodeType.all_node_type_names(),
+        "use_auto_config": {"type": "boolean"},
+        "cpu_count": {"type": "integer"},
+        "node_type": {
+            "type": "string",
+            "enum": NodeType.all_node_type_names(),
         },
     },
-    'additionalProperties': False,
+    "additionalProperties": False,
 }
 
 TRACING_SCHEMA = dict(
-    type='object',
+    type="object",
     properties=dict(
-        host=dict(type='string'),
-        port=dict(type='integer'),
-        root_ca=dict(type='string'),
-        service_name=dict(type='string'),
+        host=dict(type="string"),
+        port=dict(type="integer"),
+        root_ca=dict(type="string"),
+        service_name=dict(type="string"),
     ),
     required=[
-        'host',
-        'port',
-        'root_ca',
-        'service_name',
+        "host",
+        "port",
+        "root_ca",
+        "service_name",
     ],
     additionalProperties=False,
 )
 
 FAILURE_INJECTION_CONFIG_SCHEMA = {
     "type": "object",
-    "properties": {'approximate_termination_interval': dict(type='integer')},
+    "properties": {"approximate_termination_interval": dict(type="integer")},
     "additionalProperties": False,
 }
 
 DRIVE_SCHEMA = {
     "type": "object",
     "properties": {
-        'type': dict(type='string', enum=PDiskCategory.all_pdisk_category_names()),
-        'path': dict(type='string', minLength=1),
-        'shared_with_os': dict(type='boolean'),
-        'expected_slot_count': dict(type='integer'),
-        'kind': dict(type='integer'),
+        "type": dict(type="string", enum=PDiskCategory.all_pdisk_category_names()),
+        "path": dict(type="string", minLength=1),
+        "shared_with_os": dict(type="boolean"),
+        "expected_slot_count": dict(type="integer"),
+        "kind": dict(type="integer"),
     },
     "required": ["type", "path"],
     "additionalProperties": False,
@@ -167,7 +167,7 @@ HOST_SCHEMA = {
     "properties": {
         "name": {"type": "string", "minLength": 1},
         "drives": {"type": "array", "items": copy.deepcopy(DRIVE_SCHEMA)},
-        'host_config_id': {'type': "integer", 'minLength': 1},
+        "host_config_id": {"type": "integer", "minLength": 1},
         "ic_port": {
             "type": "integer",
         },
@@ -178,7 +178,7 @@ HOST_SCHEMA = {
 }
 
 LOG_SCHEMA = {
-    'type': "object",
+    "type": "object",
     "properties": {
         "default": {"type": "integer", "min": int(min(LogLevels)), "max": int(max(LogLevels))},
         "entries": {
@@ -199,59 +199,59 @@ LOG_SCHEMA = {
 }
 
 STORAGE_POOL = {
-    'type': 'object',
-    'properties': {
-        'erasure': {
-            'type': 'string',
-            'minLength': 1,
-            'enum': Erasure.all_erasure_type_names(),
-        },
-        'generation': {'type': 'integer', 'min': 0},
-        'encryption_mode': {'type': 'integer', 'min': 0, 'max': 1},
-        'num_groups': {
-            'type': 'integer',
-            'min': 1,
-        },
-        'storage_pool_id': {'type': 'integer', 'min': 1},
+    "type": "object",
+    "properties": {
+        "erasure": {
+            "type": "string",
+            "minLength": 1,
+            "enum": Erasure.all_erasure_type_names(),
+        },
+        "generation": {"type": "integer", "min": 0},
+        "encryption_mode": {"type": "integer", "min": 0, "max": 1},
+        "num_groups": {
+            "type": "integer",
+            "min": 1,
+        },
+        "storage_pool_id": {"type": "integer", "min": 1},
         "fail_domain_type": {
             "type": "string",
             "minLength": 1,
             "enum": FailDomainType.all_fail_domain_type_names(),
         },
-        'kind': {
-            'type': 'string',
-            'minLength': 1,
+        "kind": {
+            "type": "string",
+            "minLength": 1,
         },
-        'name': {
-            'type': 'string',
-            'minLength': 1,
+        "name": {
+            "type": "string",
+            "minLength": 1,
         },
-        'filter_properties': {
-            'type': 'object',
-            'properties': {
-                'type': {
-                    'type': 'string',
-                    'enum': PDiskCategory.all_pdisk_category_names(),
+        "filter_properties": {
+            "type": "object",
+            "properties": {
+                "type": {
+                    "type": "string",
+                    "enum": PDiskCategory.all_pdisk_category_names(),
                 },
-                'SharedWithOs': {
-                    'type': 'boolean',
+                "SharedWithOs": {
+                    "type": "boolean",
                 },
-                'kind': dict(type='integer'),
+                "kind": dict(type="integer"),
             },
-            'required': ['type'],
-            'additionalProperties': False,
+            "required": ["type"],
+            "additionalProperties": False,
         },
-        'vdisk_kind': {
-            'type': 'string',
-            'minLength': 1,
+        "vdisk_kind": {
+            "type": "string",
+            "minLength": 1,
         },
     },
-    'required': [
-        'num_groups',
-        'erasure',
-        'filter_properties',
+    "required": [
+        "num_groups",
+        "erasure",
+        "filter_properties",
     ],
-    'additionalProperties': False,
+    "additionalProperties": False,
 }
 
 STORAGE_POOL_KIND = {
@@ -259,14 +259,14 @@ STORAGE_POOL_KIND = {
     "properties": {
         "kind": {
             "type": "string",
-            'minLength': 1,
+            "minLength": 1,
         },
         "erasure": {
             "type": "string",
             "minLength": 1,
             "enum": Erasure.all_erasure_type_names(),
         },
-        'encryption_mode': {'type': 'integer', 'min': 0, 'max': 1},
+        "encryption_mode": {"type": "integer", "min": 0, "max": 1},
         "filter_properties": {
             "type": "object",
             "properties": {
@@ -274,10 +274,10 @@ STORAGE_POOL_KIND = {
                     "type": "string",
                     "enum": PDiskCategory.all_pdisk_category_names(),
                 },
-                'SharedWithOs': {
-                    'type': 'boolean',
+                "SharedWithOs": {
+                    "type": "boolean",
                 },
-                'kind': dict(type='integer'),
+                "kind": dict(type="integer"),
             },
             "required": ["type"],
             "additionalProperties": False,
@@ -287,299 +287,299 @@ STORAGE_POOL_KIND = {
             "minLength": 1,
             "enum": FailDomainType.all_fail_domain_type_names(),
         },
-        'vdisk_kind': {
-            'type': 'string',
-            'minLength': 1,
+        "vdisk_kind": {
+            "type": "string",
+            "minLength": 1,
         },
     },
     "required": ["kind", "erasure", "filter_properties"],
 }
 
 STORAGE_POOL_INSTANCE = {
-    'type': 'object',
-    'properties': {
-        'kind': {
-            'type': 'string',
-            'minLength': 1,
+    "type": "object",
+    "properties": {
+        "kind": {
+            "type": "string",
+            "minLength": 1,
         },
-        'num_groups': {
-            'type': 'integer',
-            'min': 1,
+        "num_groups": {
+            "type": "integer",
+            "min": 1,
         },
-        'generation': {
-            'type': 'integer',
-            'min': 0,
+        "generation": {
+            "type": "integer",
+            "min": 0,
         },
     },
-    'required': [
-        'kind',
-        'num_groups',
+    "required": [
+        "kind",
+        "num_groups",
     ],
-    'additionalProperties': False,
+    "additionalProperties": False,
 }
 
 
 SHARED_CACHE_SCHEMA = {
-    'type': 'object',
-    'properties': {'memory_limit': {'type': 'integer'}},
-    'additionalProperties': False,
+    "type": "object",
+    "properties": {"memory_limit": {"type": "integer"}},
+    "additionalProperties": False,
 }
 
 TENANT_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'name': {
-            'type': 'string',
-            'minLength': 1,
-        },
-        'storage_units': {
-            'type': 'array',
-            'items': {
-                'type': 'object',
-                'properties': {
-                    'count': {
-                        'type': 'integer',
+    "type": "object",
+    "properties": {
+        "name": {
+            "type": "string",
+            "minLength": 1,
+        },
+        "storage_units": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "count": {
+                        "type": "integer",
                     },
-                    'kind': {'type': 'string', 'minLength': 1},
+                    "kind": {"type": "string", "minLength": 1},
                 },
             },
         },
-        'compute_units': {
-            'type': 'array',
-            'items': {
-                'type': 'object',
-                'properties': {
-                    'count': {
-                        'type': 'integer',
-                        'min': 1,
+        "compute_units": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "count": {
+                        "type": "integer",
+                        "min": 1,
                     },
-                    'kind': {
-                        'type': 'string',
-                        'minLength': 1,
+                    "kind": {
+                        "type": "string",
+                        "minLength": 1,
                     },
-                    'zone': {'type': 'string', 'minLength': 1},
-                    'required': ['count', 'kind', 'zone'],
-                    'additionalProperties': False,
+                    "zone": {"type": "string", "minLength": 1},
+                    "required": ["count", "kind", "zone"],
+                    "additionalProperties": False,
                 },
             },
         },
-        'overridden_configs': {
-            'type': 'object',
+        "overridden_configs": {
+            "type": "object",
         },
     },
 }
 
 DOMAIN_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'domain_name': {'type': 'string', 'minLength': 1},
-        'plan_resolution': {
-            'type': 'integer',
-            'min': 1,
-        },
-        'domain_id': {'type': 'integer', 'min': 1},
-        'mediators': {
-            'type': 'integer',
-            'min': 1,
-        },
-        'coordinators': {'type': 'integer', 'min': 1},
-        'allocators': {'type': 'integer', 'min': 1},
-        'storage_pool_kinds': {'type': 'array', 'items': copy.deepcopy(STORAGE_POOL_KIND)},
-        'storage_pools': {'type': 'array', 'items': copy.deepcopy(STORAGE_POOL_INSTANCE)},
-        'databases': {
-            'type': 'array',
-            'items': copy.deepcopy(TENANT_SCHEMA),
-        },
-        'config_cookie': {
-            'type': 'string',
-        },
-        'dynamic_slots': {'type': 'integer', 'min': 1},
-        'bind_slots_to_numa_nodes': {'type': 'boolean'},
-        'console_initializers': {
-            'type': 'array',
-            'items': {
-                'type': 'string',
-                'enum': utils.get_resources_list('resources/console_initializers/'),
+    "type": "object",
+    "properties": {
+        "domain_name": {"type": "string", "minLength": 1},
+        "plan_resolution": {
+            "type": "integer",
+            "min": 1,
+        },
+        "domain_id": {"type": "integer", "min": 1},
+        "mediators": {
+            "type": "integer",
+            "min": 1,
+        },
+        "coordinators": {"type": "integer", "min": 1},
+        "allocators": {"type": "integer", "min": 1},
+        "storage_pool_kinds": {"type": "array", "items": copy.deepcopy(STORAGE_POOL_KIND)},
+        "storage_pools": {"type": "array", "items": copy.deepcopy(STORAGE_POOL_INSTANCE)},
+        "databases": {
+            "type": "array",
+            "items": copy.deepcopy(TENANT_SCHEMA),
+        },
+        "config_cookie": {
+            "type": "string",
+        },
+        "dynamic_slots": {"type": "integer", "min": 1},
+        "bind_slots_to_numa_nodes": {"type": "boolean"},
+        "console_initializers": {
+            "type": "array",
+            "items": {
+                "type": "string",
+                "enum": utils.get_resources_list("resources/console_initializers/"),
             },
         },
     },
-    'required': ['domain_name'],
-    'additionalProperties': False,
+    "required": ["domain_name"],
+    "additionalProperties": False,
 }
 
 NBS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
-        'new_config_generator_enabled': {'type': 'boolean'},
-        'sys': copy.deepcopy(SYS_SCHEMA),
-        'log': copy.deepcopy(LOG_SCHEMA),
-        'domain': {'type': 'string'},
-        'subdomain': {'type': 'string'},
-        'storage': {'type': 'object', 'properties': {}},
-        'disk_registry_proxy': {
-            'type': 'object',
-        },
-        'server': {
-            'type': 'object',
-            'properties': {
-                'host': {
-                    'type': 'string',
-                },
-                'port': {
-                    'type': 'integer',
-                },
-                'root_certs_file': {
-                    'type': 'string',
-                },
-                'certs': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'object',
-                        'properties': {
-                            'cert_file': {
-                                'type': 'string',
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
+        "new_config_generator_enabled": {"type": "boolean"},
+        "sys": copy.deepcopy(SYS_SCHEMA),
+        "log": copy.deepcopy(LOG_SCHEMA),
+        "domain": {"type": "string"},
+        "subdomain": {"type": "string"},
+        "storage": {"type": "object", "properties": {}},
+        "disk_registry_proxy": {
+            "type": "object",
+        },
+        "server": {
+            "type": "object",
+            "properties": {
+                "host": {
+                    "type": "string",
+                },
+                "port": {
+                    "type": "integer",
+                },
+                "root_certs_file": {
+                    "type": "string",
+                },
+                "certs": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "cert_file": {
+                                "type": "string",
                             },
-                            'cert_private_key_file': {
-                                'type': 'string',
+                            "cert_private_key_file": {
+                                "type": "string",
                             },
                         },
                     },
                 },
             },
         },
-        'discovery': {'type': 'object'},
-        'ydbstats': {'type': 'object'},
-        'auth': {'type': 'object'},
-        'names': {'type': 'object'},
-        'client': {
-            'type': 'object',
-            'properties': {
-                'auth_config': {'type': 'object'},
-                'client_config': {'type': 'object'},
-                'log_config': {'type': 'object'},
-                'monitoring_config': {'type': 'object'},
-                'throttling_enabled': {'type': 'boolean'},
-                'throttling_enabled_s_s_d': {'type': 'boolean'},
-                'throttling_disabled_s_s_d_nonrepl': {'type': 'boolean'},
+        "discovery": {"type": "object"},
+        "ydbstats": {"type": "object"},
+        "auth": {"type": "object"},
+        "names": {"type": "object"},
+        "client": {
+            "type": "object",
+            "properties": {
+                "auth_config": {"type": "object"},
+                "client_config": {"type": "object"},
+                "log_config": {"type": "object"},
+                "monitoring_config": {"type": "object"},
+                "throttling_enabled": {"type": "boolean"},
+                "throttling_enabled_s_s_d": {"type": "boolean"},
+                "throttling_disabled_s_s_d_nonrepl": {"type": "boolean"},
             },
-            'additionalProperties': False,
-        },
-        'http_proxy': {
-            'type': 'object',
-            'properties': {
-                'port': {
-                    'type': 'integer',
-                },
-                'secure_port': {
-                    'type': 'integer',
-                },
-                'certs': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'object',
-                        'properties': {
-                            'cert_file': {
-                                'type': 'string',
+            "additionalProperties": False,
+        },
+        "http_proxy": {
+            "type": "object",
+            "properties": {
+                "port": {
+                    "type": "integer",
+                },
+                "secure_port": {
+                    "type": "integer",
+                },
+                "certs": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "cert_file": {
+                                "type": "string",
                             },
-                            'cert_private_key_file': {
-                                'type': 'string',
+                            "cert_private_key_file": {
+                                "type": "string",
                             },
                         },
                     },
                 },
-                'nbs_server_host': {
-                    'type': 'string',
+                "nbs_server_host": {
+                    "type": "string",
                 },
-                'nbs_server_port': {
-                    'type': 'integer',
+                "nbs_server_port": {
+                    "type": "integer",
                 },
-                'nbs_server_cert_file': {
-                    'type': 'string',
+                "nbs_server_cert_file": {
+                    "type": "string",
                 },
-                'root_certs_file': {
-                    'type': 'string',
+                "root_certs_file": {
+                    "type": "string",
                 },
-                'nbs_server_insecure': {
-                    'type': 'boolean',
+                "nbs_server_insecure": {
+                    "type": "boolean",
                 },
             },
-            'additionalProperties': False,
+            "additionalProperties": False,
         },
-        'breakpad': {
-            'type': 'object',
-            'properties': {
-                'enable': {
-                    'type': 'boolean',
+        "breakpad": {
+            "type": "object",
+            "properties": {
+                "enable": {
+                    "type": "boolean",
                 },
             },
-            'additionalProperties': False,
+            "additionalProperties": False,
         },
-        'breakpad_sender': {
-            'type': 'object',
-            'properties': {
-                'aggregator_url': {
-                    'type': 'string',
+        "breakpad_sender": {
+            "type": "object",
+            "properties": {
+                "aggregator_url": {
+                    "type": "string",
                 },
-                'notify_email': {
-                    'type': 'string',
+                "notify_email": {
+                    "type": "string",
                 },
             },
-            'additionalProperties': False,
-        },
-        'logbroker': {
-            'type': 'object',
-            'properties': {
-                'address': {'type': 'string'},
-                'port': {'type': 'integer'},
-                'database': {'type': 'string'},
-                'use_logbroker_c_d_s': {'type': 'boolean'},
-                'ca_cert_filename': {'type': 'string'},
-                'topic': {'type': 'string'},
-                'source_id': {'type': 'string'},
-                'metadata_server_address': {'type': 'string'},
+            "additionalProperties": False,
+        },
+        "logbroker": {
+            "type": "object",
+            "properties": {
+                "address": {"type": "string"},
+                "port": {"type": "integer"},
+                "database": {"type": "string"},
+                "use_logbroker_c_d_s": {"type": "boolean"},
+                "ca_cert_filename": {"type": "string"},
+                "topic": {"type": "string"},
+                "source_id": {"type": "string"},
+                "metadata_server_address": {"type": "string"},
             },
-            'additionalProperties': False,
+            "additionalProperties": False,
         },
-        'notify': {'type': 'object', 'properties': {'endpoint': {'type': 'string'}}},
+        "notify": {"type": "object", "properties": {"endpoint": {"type": "string"}}},
         "iam": {
-            'type': 'object',
+            "type": "object",
         },
         "kms": {
-            'type': 'object',
+            "type": "object",
         },
         "compute": {
-            'type': 'object',
-        },
-        'features': {
-            'type': 'object',
-            'properties': {
-                'features': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'object',
-                        'properties': {
-                            'name': {
-                                'type': 'string',
+            "type": "object",
+        },
+        "features": {
+            "type": "object",
+            "properties": {
+                "features": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "name": {
+                                "type": "string",
                             },
-                            'Whitelist': {
-                                'type': 'object',
-                                'properties': {
-                                    'cloud_ids': {
-                                        'type': 'array',
-                                        'items': {
-                                            'type': 'string',
+                            "Whitelist": {
+                                "type": "object",
+                                "properties": {
+                                    "cloud_ids": {
+                                        "type": "array",
+                                        "items": {
+                                            "type": "string",
                                         },
                                     }
                                 },
                             },
-                            'Blacklist': {
-                                'type': 'object',
-                                'properties': {
-                                    'cloud_ids': {
-                                        'type': 'array',
-                                        'items': {
-                                            'type': 'string',
+                            "Blacklist": {
+                                "type": "object",
+                                "properties": {
+                                    "cloud_ids": {
+                                        "type": "array",
+                                        "items": {
+                                            "type": "string",
                                         },
                                     }
                                 },
@@ -588,93 +588,93 @@ NBS_SCHEMA = {
                     },
                 },
             },
-            'additionalProperties': False,
+            "additionalProperties": False,
         },
     },
-    'additionalProperties': False,
+    "additionalProperties": False,
 }
 
 NFS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
-        'new_config_generator_enabled': {'type': 'boolean'},
-        'sys': copy.deepcopy(SYS_SCHEMA),
-        'log': copy.deepcopy(LOG_SCHEMA),
-        'domain': {'type': 'string'},
-        'subdomain': {'type': 'string'},
-        'names': {'type': 'object'},
-        'storage': {'type': 'object'},
-        'diagnostics': {'type': 'object'},
-        'auth': {'type': 'object'},
-        'server': {
-            'type': 'object',
-            'properties': {
-                'host': {
-                    'type': 'string',
-                },
-                'port': {
-                    'type': 'integer',
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
+        "new_config_generator_enabled": {"type": "boolean"},
+        "sys": copy.deepcopy(SYS_SCHEMA),
+        "log": copy.deepcopy(LOG_SCHEMA),
+        "domain": {"type": "string"},
+        "subdomain": {"type": "string"},
+        "names": {"type": "object"},
+        "storage": {"type": "object"},
+        "diagnostics": {"type": "object"},
+        "auth": {"type": "object"},
+        "server": {
+            "type": "object",
+            "properties": {
+                "host": {
+                    "type": "string",
+                },
+                "port": {
+                    "type": "integer",
                 },
             },
         },
-        'vhost': {
-            'type': 'object',
-            'properties': {
-                'host': {
-                    'type': 'string',
+        "vhost": {
+            "type": "object",
+            "properties": {
+                "host": {
+                    "type": "string",
                 },
-                'port': {
-                    'type': 'integer',
+                "port": {
+                    "type": "integer",
                 },
             },
         },
-        'http_proxy': {
-            'type': 'object',
-            'properties': {
-                'port': {
-                    'type': 'integer',
+        "http_proxy": {
+            "type": "object",
+            "properties": {
+                "port": {
+                    "type": "integer",
                 },
-                'nfs_vhost_host': {
-                    'type': 'string',
+                "nfs_vhost_host": {
+                    "type": "string",
                 },
-                'nfs_vhost_port': {
-                    'type': 'integer',
+                "nfs_vhost_port": {
+                    "type": "integer",
                 },
             },
-            'additionalProperties': False,
+            "additionalProperties": False,
         },
     },
-    'additionalProperties': False,
+    "additionalProperties": False,
 }
 
 SQS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
-        'endpoint': {'type': 'string'},
-        'domain': {'type': 'string'},
-        'subdomain': {'type': 'string'},
-        'http_server': {
-            'type': 'object',
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
+        "endpoint": {"type": "string"},
+        "domain": {"type": "string"},
+        "subdomain": {"type": "string"},
+        "http_server": {
+            "type": "object",
         },
     },
 }
 
 SOLOMON_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
-        'domain': {'type': 'string'},
-        'subdomain': {'type': 'string'},
-        'volumes': {
-            'type': 'array',
-            'items': {
-                'type': 'object',
-                'properties': {
-                    'name': {'type': 'string'},
-                    'channels_profile': {'type': 'integer'},
-                    'partitions': {'type': 'integer'},
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
+        "domain": {"type": "string"},
+        "subdomain": {"type": "string"},
+        "volumes": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "name": {"type": "string"},
+                    "channels_profile": {"type": "integer"},
+                    "partitions": {"type": "integer"},
                 },
             },
         },
@@ -682,146 +682,146 @@ SOLOMON_SCHEMA = {
 }
 
 CMS_LIMITS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'disabled_nodes_limit': {'type': 'integer'},
-        'disabled_nodes_ratio_limit': {'type': 'integer'},
+    "type": "object",
+    "properties": {
+        "disabled_nodes_limit": {"type": "integer"},
+        "disabled_nodes_ratio_limit": {"type": "integer"},
     },
 }
 
 CMS_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable_sentinel': dict(type='boolean'),
-        'default_retry_time_sec': {'type': 'integer'},
-        'default_permission_duration_sec': {'type': 'integer'},
-        'info_collection_timeout_sec': {'type': 'integer'},
-        'tenant_limits': copy.deepcopy(CMS_LIMITS_SCHEMA),
-        'cluster_limits': copy.deepcopy(CMS_LIMITS_SCHEMA),
-        'monitors': {
-            'type': 'object',
-            'properties': {
-                'enable_auto_update': {'type': 'boolean'},
-                'update_interval_sec': {'type': 'integer'},
-                'ignored_downtime_gap_sec': {'type': 'integer'},
-                'broken_timeout_min': {'type': 'integer'},
-                'broken_prep_timeout_min': {'type': 'integer'},
-                'faulty_prep_timeout_min': {'type': 'integer'},
+    "type": "object",
+    "properties": {
+        "enable_sentinel": dict(type="boolean"),
+        "default_retry_time_sec": {"type": "integer"},
+        "default_permission_duration_sec": {"type": "integer"},
+        "info_collection_timeout_sec": {"type": "integer"},
+        "tenant_limits": copy.deepcopy(CMS_LIMITS_SCHEMA),
+        "cluster_limits": copy.deepcopy(CMS_LIMITS_SCHEMA),
+        "monitors": {
+            "type": "object",
+            "properties": {
+                "enable_auto_update": {"type": "boolean"},
+                "update_interval_sec": {"type": "integer"},
+                "ignored_downtime_gap_sec": {"type": "integer"},
+                "broken_timeout_min": {"type": "integer"},
+                "broken_prep_timeout_min": {"type": "integer"},
+                "faulty_prep_timeout_min": {"type": "integer"},
             },
         },
     },
 }
 
 STATE_STORAGE = {
-    'type': 'object',
-    'properties': {
-        'allow_incorrect': {'type': 'boolean'},
-        'node_ids': {'type': 'array', 'items': {'type': 'integer'}},
-        'node_set': {'type': 'array', 'items': {'type': 'string'}},
+    "type": "object",
+    "properties": {
+        "allow_incorrect": {"type": "boolean"},
+        "node_ids": {"type": "array", "items": {"type": "integer"}},
+        "node_set": {"type": "array", "items": {"type": "string"}},
     },
 }
 
-METERING_SCHEMA = {'type': 'object', 'properties': {'metering_file': {'type': 'string'}}}
+METERING_SCHEMA = {"type": "object", "properties": {"metering_file": {"type": "string"}}}
 
 YQL_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'endpoint': {'type': 'string'},
-        'database': {'type': 'string'},
-        'table_prefix': {'type': 'string'},
-        'oauth_file': {'type': 'string'},
-        'ydb_mvp_cloud_endpoint': {'type': 'string'},
-        'use_iam_from_metadata_service': {'type': 'boolean'},
-        'use_secure_connection': {'type': 'boolean'},
-        'use_bearer_for_ydb': {'type': 'boolean'},
-        'mdb_gateway': {'type': 'string'},
-        'mdb_transform_host': {'type': 'boolean'},
-        'object_storage_endpoint': {'type': 'string'},
-        'task_service_endpoint': {'type': 'string'},
-        'task_service_database': {'type': 'string'},
-        'impersonation_service_endpoint': {'type': 'string'},
-        'secure_task_service': {'type': 'boolean'},
-        'secure_impersonation_service': {'type': 'boolean'},
-        'hmac_secret_file': {'type': 'string'},
+    "type": "object",
+    "properties": {
+        "endpoint": {"type": "string"},
+        "database": {"type": "string"},
+        "table_prefix": {"type": "string"},
+        "oauth_file": {"type": "string"},
+        "ydb_mvp_cloud_endpoint": {"type": "string"},
+        "use_iam_from_metadata_service": {"type": "boolean"},
+        "use_secure_connection": {"type": "boolean"},
+        "use_bearer_for_ydb": {"type": "boolean"},
+        "mdb_gateway": {"type": "string"},
+        "mdb_transform_host": {"type": "boolean"},
+        "object_storage_endpoint": {"type": "string"},
+        "task_service_endpoint": {"type": "string"},
+        "task_service_database": {"type": "string"},
+        "impersonation_service_endpoint": {"type": "string"},
+        "secure_task_service": {"type": "boolean"},
+        "secure_impersonation_service": {"type": "boolean"},
+        "hmac_secret_file": {"type": "string"},
     },
 }
 
 YQ_SCHEMA = {
-    'type': 'object',
-    'properties': {
-        'enable': {'type': 'boolean'},
-        'control_plane': {
-            'type': 'object',
-            'properties': {
-                'enable': {'type': 'boolean'},
-                'endpoint': {'type': 'string'},
-                'database': {'type': 'string'},
-                'table_prefix': {'type': 'string'},
-                'oauth_file': {'type': 'string'},
-                'certificate_file': {'type': 'string'},
-                'iam_endpoint': {'type': 'string'},
-                'sa_key_file': {'type': 'string'},
-                'use_local_metadata_service': {'type': 'boolean'},
-                'enable_forward_analytics': {'type': 'boolean'},
-                'enable_permissions': {'type': 'boolean'},
+    "type": "object",
+    "properties": {
+        "enable": {"type": "boolean"},
+        "control_plane": {
+            "type": "object",
+            "properties": {
+                "enable": {"type": "boolean"},
+                "endpoint": {"type": "string"},
+                "database": {"type": "string"},
+                "table_prefix": {"type": "string"},
+                "oauth_file": {"type": "string"},
+                "certificate_file": {"type": "string"},
+                "iam_endpoint": {"type": "string"},
+                "sa_key_file": {"type": "string"},
+                "use_local_metadata_service": {"type": "boolean"},
+                "enable_forward_analytics": {"type": "boolean"},
+                "enable_permissions": {"type": "boolean"},
             },
         },
-        'analytics': {
-            'type': 'object',
-            'properties': {
-                'enable': {'type': 'boolean'},
-                'endpoint': {'type': 'string'},
-                'database': {'type': 'string'},
-                'table_prefix': {'type': 'string'},
-                'oauth_file': {'type': 'string'},
-                'ydb_mvp_cloud_endpoint': {'type': 'string'},
-                'use_iam_from_metadata_service': {'type': 'boolean'},
-                'use_secure_connection': {'type': 'boolean'},
-                'use_bearer_for_ydb': {'type': 'boolean'},
-                'mdb_gateway': {'type': 'string'},
-                'mdb_transform_host': {'type': 'boolean'},
-                'object_storage_endpoint': {'type': 'string'},
-                'task_service_endpoint': {'type': 'string'},
-                'task_service_database': {'type': 'string'},
-                'impersonation_service_endpoint': {'type': 'string'},
-                'secure_task_service': {'type': 'boolean'},
-                'secure_impersonation_service': {'type': 'boolean'},
-                'hmac_secret_file': {'type': 'string'},
+        "analytics": {
+            "type": "object",
+            "properties": {
+                "enable": {"type": "boolean"},
+                "endpoint": {"type": "string"},
+                "database": {"type": "string"},
+                "table_prefix": {"type": "string"},
+                "oauth_file": {"type": "string"},
+                "ydb_mvp_cloud_endpoint": {"type": "string"},
+                "use_iam_from_metadata_service": {"type": "boolean"},
+                "use_secure_connection": {"type": "boolean"},
+                "use_bearer_for_ydb": {"type": "boolean"},
+                "mdb_gateway": {"type": "string"},
+                "mdb_transform_host": {"type": "boolean"},
+                "object_storage_endpoint": {"type": "string"},
+                "task_service_endpoint": {"type": "string"},
+                "task_service_database": {"type": "string"},
+                "impersonation_service_endpoint": {"type": "string"},
+                "secure_task_service": {"type": "boolean"},
+                "secure_impersonation_service": {"type": "boolean"},
+                "hmac_secret_file": {"type": "string"},
             },
         },
-        'streaming': {
-            'type': 'object',
-            'properties': {
-                'enable': {'type': 'boolean'},
-                'endpoint': {'type': 'string'},
-                'database': {'type': 'string'},
-                'table_prefix': {'type': 'string'},
-                'oauth_file': {'type': 'string'},
-                'certificate_file': {'type': 'string'},
-                'hmac_secret_file': {'type': 'string'},
-                'iam_endpoint': {'type': 'string'},
-                'sa_key_file': {'type': 'string'},
-                'use_local_metadata_service': {'type': 'boolean'},
-                'checkpointing': {
-                    'type': 'object',
-                    'properties': {
-                        'enabled': {'type': 'boolean'},
-                        'period_millis': {'type': 'integer'},
-                        'max_in_flight': {'type': 'integer'},
+        "streaming": {
+            "type": "object",
+            "properties": {
+                "enable": {"type": "boolean"},
+                "endpoint": {"type": "string"},
+                "database": {"type": "string"},
+                "table_prefix": {"type": "string"},
+                "oauth_file": {"type": "string"},
+                "certificate_file": {"type": "string"},
+                "hmac_secret_file": {"type": "string"},
+                "iam_endpoint": {"type": "string"},
+                "sa_key_file": {"type": "string"},
+                "use_local_metadata_service": {"type": "boolean"},
+                "checkpointing": {
+                    "type": "object",
+                    "properties": {
+                        "enabled": {"type": "boolean"},
+                        "period_millis": {"type": "integer"},
+                        "max_in_flight": {"type": "integer"},
                     },
                 },
             },
         },
-        'token_accessor': {
-            'type': 'object',
-            'properties': {'endpoint': {'type': 'string'}, 'use_ssl': {'type': 'boolean'}},
+        "token_accessor": {
+            "type": "object",
+            "properties": {"endpoint": {"type": "string"}, "use_ssl": {"type": "boolean"}},
         },
-        'folder_service': {
-            'type': 'object',
-            'properties': {
-                'enable': {'type': 'boolean'},
-                'endpoint': {'type': 'string'},
-                'path_to_root_ca': {'type': 'string'},
+        "folder_service": {
+            "type": "object",
+            "properties": {
+                "enable": {"type": "boolean"},
+                "endpoint": {"type": "string"},
+                "path_to_root_ca": {"type": "string"},
             },
         },
     },
@@ -830,54 +830,54 @@ YQ_SCHEMA = {
 TEMPLATE_SCHEMA = {
     "type": "object",
     "properties": {
-        'enable_cores': dict(type='boolean'),
-        'state_storage': copy.deepcopy(STATE_STORAGE),
-        "system_tablets": {'type': 'object'},
-        "forbid_implicit_storage_pools": {'type': 'boolean'},
-        "use_fixed_tablet_types": {'type': 'boolean'},
-        "monitoring_address": {'type': 'string'},
-        "use_console_feature": {'type': 'boolean'},
-        'storage_config_generation': {'type': 'integer'},
-        'use_walle': {'type': 'boolean'},
-        'cloud_mode': {'type': 'boolean'},
-        'host_configs': {
-            'type': 'array',
-            'items': {
-                'type': 'object',
-                'properties': {
-                    'generation': {'type': 'integer', 'min': 0},
-                    'drives': {
-                        'type': 'array',
-                        'items': copy.deepcopy(DRIVE_SCHEMA),
+        "enable_cores": dict(type="boolean"),
+        "state_storage": copy.deepcopy(STATE_STORAGE),
+        "system_tablets": {"type": "object"},
+        "forbid_implicit_storage_pools": {"type": "boolean"},
+        "use_fixed_tablet_types": {"type": "boolean"},
+        "monitoring_address": {"type": "string"},
+        "use_console_feature": {"type": "boolean"},
+        "storage_config_generation": {"type": "integer"},
+        "use_walle": {"type": "boolean"},
+        "cloud_mode": {"type": "boolean"},
+        "host_configs": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "generation": {"type": "integer", "min": 0},
+                    "drives": {
+                        "type": "array",
+                        "items": copy.deepcopy(DRIVE_SCHEMA),
                     },
                 },
             },
         },
-        'static_bs_group_hosts': {
-            'type': 'array',
-            'items': {
-                'type': 'string',
+        "static_bs_group_hosts": {
+            "type": "array",
+            "items": {
+                "type": "string",
             },
         },
-        'use_cluster_uuid': {
-            'type': 'boolean',
+        "use_cluster_uuid": {
+            "type": "boolean",
         },
-        'require_address': {
-            'type': 'boolean',
+        "require_address": {
+            "type": "boolean",
         },
-        'cluster_uuid': {
-            'type': 'string',
-            'minLength': 1,
+        "cluster_uuid": {
+            "type": "string",
+            "minLength": 1,
         },
-        'accepted_cluster_uuids': {'type': 'array', 'items': {'type': 'string', 'minLength': 1}},
-        'security_settings': {
-            'type': 'object',
-            'properties': {
-                'enforce_user_token_requirement': {
-                    'type': 'boolean',
+        "accepted_cluster_uuids": {"type": "array", "items": {"type": "string", "minLength": 1}},
+        "security_settings": {
+            "type": "object",
+            "properties": {
+                "enforce_user_token_requirement": {
+                    "type": "boolean",
                 },
-                'monitoring_allowed_sids': {'type': 'array', 'items': {'type': 'string'}},
-                'administration_allowed_sids': {'type': 'array', 'items': {'type': 'string'}},
+                "monitoring_allowed_sids": {"type": "array", "items": {"type": "string"}},
+                "administration_allowed_sids": {"type": "array", "items": {"type": "string"}},
             },
         },
         "static_erasure": {
@@ -890,58 +890,58 @@ TEMPLATE_SCHEMA = {
             "minLength": 1,
             "enum": FailDomainType.all_fail_domain_type_names(),
         },
-        'static_pdisk_type': {
-            'type': 'string',
-            'enum': PDiskCategory.all_pdisk_category_names(),
+        "static_pdisk_type": {
+            "type": "string",
+            "enum": PDiskCategory.all_pdisk_category_names(),
         },
-        'nw_cache_file_path': {
-            'type': 'string',
+        "nw_cache_file_path": {
+            "type": "string",
         },
-        'enable_cms_config_cache': {
-            'type': 'boolean',
+        "enable_cms_config_cache": {
+            "type": "boolean",
         },
         "hosts": {
             "type": "array",
             "items": copy.deepcopy(HOST_SCHEMA),
-            'minItems': 1,
-            'checkNameServiceDuplicates': True,
-        },
-        'auth': {'type': 'object'},
-        'log': copy.deepcopy(LOG_SCHEMA),
-        'grpc': {'type': 'object'},
-        'kqp': copy.deepcopy(KQP_SCHEMA),
-        'ic': {'type': 'object'},
-        'pq': {'type': 'object'},
-        'storage_pools': {'type': 'array', 'items': copy.deepcopy(STORAGE_POOL)},
-        'profiles': copy.deepcopy(PROFILES),
-        'domains': {'type': 'array', 'items': copy.deepcopy(DOMAIN_SCHEMA), 'minItems': 1},
-        'nbs': copy.deepcopy(NBS_SCHEMA),
-        'nbs_control': copy.deepcopy(NBS_SCHEMA),
-        'nfs': copy.deepcopy(NFS_SCHEMA),
-        'nfs_control': copy.deepcopy(NFS_SCHEMA),
-        'sqs': copy.deepcopy(SQS_SCHEMA),
-        'features': copy.deepcopy(FEATURES_SCHEMA),
-        'shared_cache': copy.deepcopy(SHARED_CACHE_SCHEMA),
-        'sys': copy.deepcopy(SYS_SCHEMA),
-        'tracing': copy.deepcopy(TRACING_SCHEMA),
-        'failure_injection_config': copy.deepcopy(FAILURE_INJECTION_CONFIG_SCHEMA),
-        'solomon': copy.deepcopy(SOLOMON_SCHEMA),
-        'cms': copy.deepcopy(CMS_SCHEMA),
-        'resource_broker': {'type': 'object'},
-        'state_storages': {
-            'type': 'array',
-            'items': {'type': 'object', 'properties': {}, 'additionalProperties': True},
-        },
-        'metering': copy.deepcopy(METERING_SCHEMA),
-        'yql_analytics': copy.deepcopy(YQL_SCHEMA),
-        'yq': copy.deepcopy(YQ_SCHEMA),
+            "minItems": 1,
+            "checkNameServiceDuplicates": True,
+        },
+        "auth": {"type": "object"},
+        "log": copy.deepcopy(LOG_SCHEMA),
+        "grpc": {"type": "object"},
+        "kqp": copy.deepcopy(KQP_SCHEMA),
+        "ic": {"type": "object"},
+        "pq": {"type": "object"},
+        "storage_pools": {"type": "array", "items": copy.deepcopy(STORAGE_POOL)},
+        "profiles": copy.deepcopy(PROFILES),
+        "domains": {"type": "array", "items": copy.deepcopy(DOMAIN_SCHEMA), "minItems": 1},
+        "nbs": copy.deepcopy(NBS_SCHEMA),
+        "nbs_control": copy.deepcopy(NBS_SCHEMA),
+        "nfs": copy.deepcopy(NFS_SCHEMA),
+        "nfs_control": copy.deepcopy(NFS_SCHEMA),
+        "sqs": copy.deepcopy(SQS_SCHEMA),
+        "features": copy.deepcopy(FEATURES_SCHEMA),
+        "shared_cache": copy.deepcopy(SHARED_CACHE_SCHEMA),
+        "sys": copy.deepcopy(SYS_SCHEMA),
+        "tracing": copy.deepcopy(TRACING_SCHEMA),
+        "failure_injection_config": copy.deepcopy(FAILURE_INJECTION_CONFIG_SCHEMA),
+        "solomon": copy.deepcopy(SOLOMON_SCHEMA),
+        "cms": copy.deepcopy(CMS_SCHEMA),
+        "resource_broker": {"type": "object"},
+        "state_storages": {
+            "type": "array",
+            "items": {"type": "object", "properties": {}, "additionalProperties": True},
+        },
+        "metering": copy.deepcopy(METERING_SCHEMA),
+        "yql_analytics": copy.deepcopy(YQL_SCHEMA),
+        "yq": copy.deepcopy(YQ_SCHEMA),
     },
     "required": ["static_erasure", "hosts"],
 }
 
 
 def _host_and_ic_port(host):
-    return "%s:%s" % (host['name'], str(host.get('ic_port', 19001)))
+    return "%s:%s" % (host["name"], str(host.get("ic_port", 19001)))
 
 
 def checkNameServiceDuplicates(validator, allow_duplicates, instance, schema):
@@ -962,7 +962,7 @@ _Validator = jsonschema.Draft4Validator
 _Validator = jsonschema.validators.extend(
     _Validator,
     {
-        'checkNameServiceDuplicates': checkNameServiceDuplicates,
+        "checkNameServiceDuplicates": checkNameServiceDuplicates,
     },
 )
 
@@ -973,6 +973,9 @@ class Validator(_Validator):
         super(Validator, self).__init__(schema, format_checker=format_checker)
 
 
+def default_validator():
+    return Validator(copy.deepcopy(TEMPLATE_SCHEMA))
+
+
 def validate(template):
-    schema = copy.deepcopy(TEMPLATE_SCHEMA)
-    Validator(schema).validate(template)
+    default_validator().validate(template)
diff --git a/ydb/tools/cfg/walle/__init__.py b/ydb/tools/cfg/walle/__init__.py
index df7d52021c..808bc9e2bd 100644
--- a/ydb/tools/cfg/walle/__init__.py
+++ b/ydb/tools/cfg/walle/__init__.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-from .walle import HostsFetcherInterface, NopHostsFetcher  # noqa
+from .walle import HostsInformationProvider, NopHostsInformationProvider, WalleHostsInformationProvider  # noqa
 
-__all__ = ('Walle',)
+__all__ = ("Walle",)
diff --git a/ydb/tools/cfg/walle/walle.py b/ydb/tools/cfg/walle/walle.py
index 92792aaf6e..e2677f48a9 100644
--- a/ydb/tools/cfg/walle/walle.py
+++ b/ydb/tools/cfg/walle/walle.py
@@ -1,10 +1,19 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
+import os
+import requests
+import threading
 import zlib
+import json
+import time
+
+
 from abc import ABCMeta, abstractmethod
 
+from six.moves.urllib import parse
+
 
-class HostsFetcherInterface:
+class HostsInformationProvider:
     __metaclass__ = ABCMeta
 
     @abstractmethod
@@ -20,7 +29,7 @@ class HostsFetcherInterface:
         pass
 
 
-class NopHostsFetcher(HostsFetcherInterface):
+class NopHostsInformationProvider(HostsInformationProvider):
     def __init__(self):
         pass
 
@@ -32,3 +41,65 @@ class NopHostsFetcher(HostsFetcherInterface):
 
     def get_body(self, hostname):
         return zlib.crc32(hostname.encode())
+
+
+class WalleHostsInformationProvider(HostsInformationProvider):
+    def __init__(self, provider_url=None, cloud_mode=False):
+        if provider_url is None:
+            raise RuntimeError("Got empty hosts_provider url")
+        self._base_url = provider_url
+        self._cache = {}
+        self._timeout_seconds = 5
+        self._retry_count = 10
+        self._cloud_mode = cloud_mode
+        self._lock = threading.Lock()
+
+    def _ask_location(self, hostname):
+        with self._lock:
+            if hostname in self._cache:
+                return self._cache[hostname]
+
+        with requests.Session() as session:
+            retries = 10
+            url = self._base_url + hostname + "?" + parse.urlencode({"fields": "location,name,inv,short_queue_name"})
+            headers = dict()
+            if "YC_TOKEN" in os.environ:
+                headers["Authorization"] = "Bearer " + os.environ.get("YC_TOKEN").strip()
+
+            while retries > 0:
+                retries -= 1
+
+                try:
+                    response = session.get(url, timeout=self._timeout_seconds, headers=headers)
+                    response.raise_for_status()
+                    loaded = json.loads(response.content)
+                    with self._lock:
+                        self._cache[hostname] = loaded
+                        return self._cache[hostname]
+
+                except IOError:
+                    if retries == 0:
+                        raise RuntimeError(
+                            "Failed to retrieve information about host %s in %d retries"
+                            % (
+                                hostname,
+                                self._retry_count,
+                            )
+                        )
+
+                time.sleep(3)
+            raise RuntimeError()
+
+    def get_rack(self, hostname):
+        short_queue_name = self._ask_location(hostname)["location"]["short_queue_name"]
+        rack = self._ask_location(hostname)["location"]["rack"]
+        if self._cloud_mode:
+            return "{}:{}".format(short_queue_name.lower(), rack.lower())
+        return "{}#{}".format(short_queue_name.upper(), rack)
+
+    def get_datacenter(self, hostname):
+        short_dc_name = self._ask_location(hostname)["location"]["short_datacenter_name"]
+        return short_dc_name if self._cloud_mode else short_dc_name.upper()
+
+    def get_body(self, hostname):
+        return self._ask_location(hostname)["inv"]