June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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发布控制器和
Operator
｜
171
7.1.1
打包：挑战
Kubernetes
通过资源清单文件（通常是
YAML
格式）来定义资源，这是一种
非常底层的资源声明接口，存在一定的缺点。对于通过容器打包的应用来说，
这些
YAML
文件都是静态的，里面所有的配置值也都是固定的。这就意味着，
如果你想改变
Deployment
清单文件中的某个值，比如容器所用的镜像，你都
需要生成一个新的清单文件。
来看一个具体的例子。假如你有一个
YAML
格式的名为
mycontroller.yaml
的
Kubernetes Deployment
清单文件，用来描述你想安装的自定义控制器：
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: mycustomcontroller
spec:
replicas: 1
template:
metadata:
labels:
app: customcontroller
spec:
containers:
- name: thecontroller
image: example/controller:0.1.0
ports:
- containerPort: 9999
env:
- name: REGION
value: eu-west-1
假如其中的
REGION
环境变量是你的控制器的一个运行时参数，它配置了一
些第三方服务。换句话说，如果默认值
eu-west-1 ...
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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.