November 2021
Beginner to intermediate
239 pages
4h 15m
Chinese
Content preview from Dapr学习手册
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54
｜
第
1
章
服务a
服务b
图
1
-
1
：通过 Dapr sidecar 进行服务调用
1.3.1
名称解析
调用另一个服务所需的第一个步骤是定位服务。每个
Dapr sidecar
都由一个字
符串
ID
来标识。名称解析的任务是将
Dapr ID
映射到一个可路由的地址。默
认情况下，在
Kubernetes
上运行时
Dapr
使用
Kubernetes
名称解析机制，在
本地模式下运行时使用多播
DNS
（
mDNS
）来实现。
Dapr
还允许其他名称解
析器作为组件插入到运行时。
1.3.1.1 Kubernetes
当部署带有
Dapr
注解的
pod
时，
Dapr
会自动将
Dapr sidecar
容器注入到
pod
中。
Dapr
还会创建一个带有
-dapr
后缀的
ClusterIP
服务。为了验证这一点，
使用
kubectl
从
Dapr
的样例仓库（
https://oreil.ly/Z7l6H
）中部署以下
pod
定 义：
apiVersion: apps/v1
kind: Deployment
metadata:
name: pythonapp
labels:
app: python
spec:
replicas: 1
selector:
matchLabels:
app: python
template:
服务
｜
55
metadata: ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.