apollo client wrapped by pydantic
Project description
apollo_pydantic
apollo_pydantic包是一个apollo的客户端封装,使用pydantic_settings的类型系统自动进行配置解析和类型转换,可以方便的使用apollo配置,可以自动或者手动同步配置。 pydantic_settings详情见pydantic_settings 当使用apollo作为微服务配置中心时,推荐使用apollo_pydantic。
如何安装
apollo_pydantic
已上传至pypi,可以通过如下命令安装
pip install apollo_pydantic
注意事项
- 建议使用一个
Base
类作为配置类基类,设置apollo的相关链接参数。当使用多个appid和cluster时,需要配置多个基类 - 每个设置类对应一个namespace, 继承同一个配置基类下的配置类namespace不允许重复
- 每个设置类对应一个label, 用于apollo的灰度发布使用的label
class Base(ApolloSettings):
model_config = ApolloSettingsConfigDict(
# 官方演示地址
config_server='http://81.68.181.139:8080',
appid='0001234',
cluster='dev',
secret_key='0398e769780c4e6399d9e6f73910e155' # if set
)
class ApolloSettingsModel(Base):
__namespace__ = 'application'
__label__ = None
...
- 支持嵌套的配置项,但是要注意嵌套配置项需要继承自
pydantic.BaseModel
,并且要在根配置类前定义, 否则可能有解析失败的情况,具体详情见pydantic_settings
class Base(ApolloSettings):
...
class Nested(BaseModel):
some_name: str
class ApolloSettingsModel(Base):
__namespace__ = 'application'
# 配置项 nested.some_name = xxx
nested: Nested
await ApolloSettingsModel.refresh() # 主动刷新
print(ApolloSettingsModel().nested.some_name) # xxx
- 支持配置项的
validation_alias
和alias
属性, 该属性可以为配置项指定别名,如配置项alias_name = some_value
可以设置validation_alias = 'alias_name'
或者alias = 'alias_name'
, 该字段会解析为some_value
. 注意设置别名时,不要包含.
符号, 因为.
符号会被解析为嵌套的配置项 apollo配置如下:
some_name = xxx
python代码如下:
class Base(ApolloSettings):
...
class ApolloSettingsModel(Base):
__namespace__ = 'application'
__label__ = None
# 配置项 some_name = xxx
some_value: str = Field(alias='some_name')
await ApolloSettingsModel.refresh() # 主动刷新
print(ApolloSettingsModel().some_value) # xxx
慎用AliasPath
, 除非精通pydantic_settings
的使用。
6. 支持自定义Field
,相关校验参见pydantic_settings
7. 支持数组类型配置,如配置项some_name[0] = xxx
和some_name[1] = yyy
, 该字段会解析为['xxx', 'yyy']
, 该种方式目前不支持数组中嵌套配置项类。如要使用这种配置项可以直接使用json来实现
class Base(ApolloSettings):
...
class ApolloSettingsModel(Base):
__namespace__ = 'application'
__label__ = None
# 配置项
# some_name[0] = xxx
# some_name[1] = yyy
some_name: List[str]
# 配置项
# some_value = ["xxx", "yyy"]
some_json_value: List[str]
await ApolloSettingsModel.refresh() # 主动刷新
print(ApolloSettingsModel().some_name) # ['xxx', 'yyy']
print(ApolloSettingsModel().some_json_value) # ['xxx', 'yyy']
8. 暂不支持同步线程的方式同步配置,后续会有同步线程的支持
例子
例子详见apollo_pydantic/examples
目录。
apollo的官方演示地址为http://81.68.181.139
使用pydantic_settings
import asyncio
import datetime
from typing import List, Optional
from pydantic import AliasPath, BaseModel, Field, HttpUrl
from apollo_pydantic import (ApolloSettings, ApolloSettingsConfigDict,
enable_debug)
class Base(ApolloSettings):
model_config = ApolloSettingsConfigDict(
# 官方演示地址
config_server='http://81.68.181.139:8080',
appid='0001234',
cluster='dev',
secret_key='0398e769780c4e6399d9e6f73910e155' # if set
)
class B(BaseModel):
bb: List[int]
cc: int = Field(validation_alias=AliasPath('bb', 0))
class ApolloSettingsModel(Base):
__namespace__ = 'application'
__label__ = None
# apollo 的官方演示地址
url: HttpUrl = 'http://81.68.181.139:8080'
key1: str
white_list: List[int] = Field(default_factory=lambda: ['1', '2', '3'])
port: int
redis_port: int
is_encrypted: bool
# a.bb[0] = 123
some_value: Optional[str] = Field(validation_alias=AliasPath('a', 'bb', 0)) # 这里使用AliasPath,需要该配置类必须要有`a`字段
# c-dd = xxx
c_dd: str = Field(alias='c-dd')
a: B
start: datetime.timedelta = 1
arr: List
class Abc(Base):
__label__ = None
__namespace__ = 'aUQTr9'
aaa: str = Field(alias='abc')
abc: int
async def main():
# enable_debug()
# 自动更新
await ApolloSettings.start()
while True:
# 手动更新
# await ApolloSettingsModel.refresh()
print(ApolloSettingsModel(), datetime.datetime.now())
print(Abc(), '###' * 20)
await asyncio.sleep(10)
if __name__ == '__main__':
# apollo配置如下
"""
key1 = value1
white_list = [1, 2, 3,"5",3734985]
port = 3306
redis_port = 6379
is_encrypted = true
123 = fsfg范德萨gf
xxx = {"业务编号":"123","通道":"123"} # ignore
a.bb[0] = 1
a.bb[1] = 2
c-dd = fgfg
arr[0] = 123
arr[1] = 2
"""
enable_debug()
print('##' * 20)
asyncio.run(main())
集成fastapi
from fastapi import FastAPI
...
# some imports
class Base(ApolloSettings):
model_config = ApolloSettingsConfigDict(
# 官方演示地址
config_server='http://81.68.181.139:8080',
appid='0001234',
cluster='dev',
secret_key='0398e769780c4e6399d9e6f73910e155' # if set
)
...
# define your settings
async def sync_settings(app: FastAPI):
# 自动同步
await ApolloSettings.start()
yield app
await ApolloSettings.stop()
app = FastAPI(lifespan=sync_settings)
if __name__ == '__main__':
import uvicorn
uvicorn.run(app, host='0.0.0.0', port=8000)
功能
- 自动同步配置
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