ValidationError：在 io.k8s.api.v1.DeploymentSpec 中缺少必填字段“选择器”

Question

我已经创建了 Hyper-V 机器并尝试使用 Sawtooth YAML 文件在 Minikube 上部署 Sawtooth： https://sawtooth.hyperledger.org/docs/core/nightly/master/app_developers_guide/sawtooth-kubernetes-default.yaml

我将 apiVersion 即 apiVersion: extensions/v1beta1 更改为 apiVersion: apps/v1，尽管我已经使用此命令在 Kubernetes v1.17.0 中启动了 Minikube

minikube 启动 --kubernetes-version v1.17.0

之后我无法部署服务器。命令是

kubectl apply -f sawtooth-kubernetes-default.yaml --validate=false

它显示错误“sawtooth-0”无效。

---
apiVersion: v1
kind: List

items:

- apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: sawtooth-0
  spec:
    replicas: 1
    selector:
      matchLabels:
        name: sawtooth-0
    template:
      metadata:
        labels:
          name: sawtooth-0
      spec:
        containers:
          - name: sawtooth-devmode-engine
            image: hyperledger/sawtooth-devmode-engine-rust:chime
            command:
              - bash
            args:
              - -c
              - "devmode-engine-rust -C tcp://$HOSTNAME:5050"

          - name: sawtooth-settings-tp
            image: hyperledger/sawtooth-settings-tp:chime
            command:
              - bash
            args:
              - -c
              - "settings-tp -vv -C tcp://$HOSTNAME:4004"

          - name: sawtooth-intkey-tp-python
            image: hyperledger/sawtooth-intkey-tp-python:chime
            command:
              - bash
            args:
              - -c
              - "intkey-tp-python -vv -C tcp://$HOSTNAME:4004"

          - name: sawtooth-xo-tp-python
            image: hyperledger/sawtooth-xo-tp-python:chime
            command:
              - bash
            args:
              - -c
              - "xo-tp-python -vv -C tcp://$HOSTNAME:4004"

          - name: sawtooth-validator
            image: hyperledger/sawtooth-validator:chime
            ports:
              - name: tp
                containerPort: 4004
              - name: consensus
                containerPort: 5050
              - name: validators
                containerPort: 8800
            command:
              - bash
            args:
              - -c
              - "sawadm keygen \
              && sawtooth keygen my_key \
              && sawset genesis -k /root/.sawtooth/keys/my_key.priv \
              && sawset proposal create \
                -k /root/.sawtooth/keys/my_key.priv \
                sawtooth.consensus.algorithm.name=Devmode \
                sawtooth.consensus.algorithm.version=0.1 \
                -o config.batch \
              && sawadm genesis config-genesis.batch config.batch \
              && sawtooth-validator -vv \
                  --endpoint tcp://$SAWTOOTH_0_SERVICE_HOST:8800 \
                  --bind component:tcp://eth0:4004 \
                  --bind consensus:tcp://eth0:5050 \
                  --bind network:tcp://eth0:8800"

          - name: sawtooth-rest-api
            image: hyperledger/sawtooth-rest-api:chime
            ports:
              - name: api
                containerPort: 8008
            command:
              - bash
            args:
              - -c
              - "sawtooth-rest-api -C tcp://$HOSTNAME:4004"

          - name: sawtooth-shell
            image: hyperledger/sawtooth-shell:chime
            command:
              - bash
            args:
              - -c
              - "sawtooth keygen && tail -f /dev/null"

- apiVersion: apps/v1
  kind: Service
  metadata:
    name: sawtooth-0
  spec:
    type: ClusterIP
    selector:
      name: sawtooth-0
    ports:
      - name: "4004"
        protocol: TCP
        port: 4004
        targetPort: 4004
      - name: "5050"
        protocol: TCP
        port: 5050
        targetPort: 5050
      - name: "8008"
        protocol: TCP
        port: 8008
        targetPort: 8008
      - name: "8800"
        protocol: TCP
        port: 8800
        targetPort: 8800

Answer 1

您需要修复您的部署yaml 文件。从您的错误消息中可以看出，Deployment.spec.selector 字段不能为空。

更新yaml（即添加spec.selector）如下所示：

  spec:
    replicas: 1
    selector:
      matchLabels:
        app.kubernetes.io/name: sawtooth-0
    template:
      metadata:
        labels:
          app.kubernetes.io/name: sawtooth-0

• 为什么selector 字段很重要？

selector 字段定义了 Deployment 如何查找要管理的 Pod。在这种情况下，您只需选择在 Pod 模板中定义的标签 (app.kubernetes.io/name: sawtooth-0)。然而，更复杂的选择规则是可能的，只要 Pod 模板本身满足规则。

• Reference

更新：

k8s 服务的apiVersion 是v1:

- apiVersion: v1 # Update here
  kind: Service
  metadata:
    app.kubernetes.io/name: sawtooth-0
  spec:
    type: ClusterIP
    selector:
      app.kubernetes.io/name: sawtooth-0
    ... ... ...

Answer 2

@Kamol 已经给出了答案

---

如果您仍然收到错误的一些一般可能原因：

missing required field “XXX” in YYY

1. 检查文件顶部的apiVersion（对于部署，版本为：apps/v1 & 对于服务，它是 v1
2. 检查“XXX”的spelling（未知字段）并检查syntax是否不正确。
3. 再次检查kind: ...。

如果您发现其他原因，请发表评论并让其他人知道:)

Answer 3

对于 api 版本 v1（以及应用程序/v1），您需要使用 app: <your lable>

apiVersion: v1
kind: Service
metadata:
  name: sawtooth-0
spec:
  selector:
    app: sawtooth-0

见：https://kubernetes.io/docs/concepts/services-networking/service/