wrong Node Kind for expected: SequenceNode was MappingNode-CodePudding

I have this manifest

apiVersion: apps/v1
kind: Deployment
metadata:
  name: cert-manager
  namespace: "cert-manager"
spec:
  template:
    spec:
      containers:
        nodeSelector:
          app.myapp.com/environment: system

When I try to apply with kubectl I get this error:

error: wrong Node Kind for expected: SequenceNode was MappingNode: value: {nodeSelector: app.myapp.com/environment: system}

What can be?

CodePudding user response：

As mentioned by @mdaniel, a container is an array, you have to mention the field name preceding with “-” inside a container. Here in your use case, removing the leading ”-” from nodeSelector: has turned the container from an array member into a dict. So, you will need to mention “-” to the nodeSelector field.

Refer to the Deployments for more information on how to define containers.