解析hostname.yml时出错:将YAML转换为JSON时出错:YAML:第21行:找不到所需的键

Question

我正试图在Kubernetes集群上部署一个示例应用程序，但我遇到了错误：

解析hostname.yml时出错：将YAML转换为JSON时出错：YAML：第21行：未找到所需的密钥

下面是我的hostaname.yml文件

apiVersion: apps/v1
kind: Deployment
metadata:
name: hostname-v1 
spec:
replicas: 1
selector:
matchLabels:
app: hostname
strategy:
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
type: RollingUpdate
template:
metadata:
labels:
app: hostname
version: v1
spec:
containers:
- image: akslearning.azurecr.io/hostname:v1
imagePullPolicy: Always
name: hostname
resources: {}
restartPolicy: Always
apiVersion: v1
kind: Service
metadata:
labels:
app: hostname
name: hostname
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: hostname
sessionAffinity: None
type: LoadBalancer

请建议如何进行

Answer 1

以下是格式化方面的一些问题。如前所述，如果使用多个资源(Deployment和Service(，则必须使用---将它们分隔开。第二件事是，YAML格式是严格的，你不能使用TABs，只有使用spacebar的白色符号才能使用正确的indent。

请在下面找到已更正的YAML:

cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
name: hostname-v1 
spec:
replicas: 1
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 1
maxUnavailable: 1  
selector:
matchLabels:
app: hostname
template:
metadata:
labels:
app: hostname  
version: v1
spec:
containers:
- image: nginx
imagePullPolicy: Always
name: hostname 
resources: {}
restartPolicy: Always
---       
apiVersion: v1
kind: Service
metadata:
labels:
app: hostname
name: hostname
spec:
type: LoadBalancer
selector:
app: hostname
ports:
- port: 80
protocol: TCP
targetPort: 80
sessionAffinity: None
EOF
deployment.apps/hostname-v1 created
service/hostname created

然而，我也会在您的DeployemntYAML中添加.metadata.labels，如Kubernetes文档中所述

apiVersion: apps/v1
kind: Deployment
metadata:
name: hostname-v1 
labels:                #This line
app: hostname        #And this line
spec:
...

如果你在在线YAML to JSON converter中检查这个YAML，就像codebeautify一样，它工作得很好。