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

Question

我创建了 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 ie 更改apiVersion: extensions/v1beta1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 start --kubernetes-version v1.17.0

之后我无法部署服务器。命令是

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

它显示“sawtooth-0”无效的错误。

---
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

您需要修复部署yaml文件。从错误消息中可以看出，该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？

该selector字段定义了 Deployment 如何找到要管理的 Pod。在这种情况下，您只需选择在 Pod 模板 ( app.kubernetes.io/name: sawtooth-0) 中定义的标签。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。

• 参考

更新：

在apiVersion为K8S服务v1：

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