ุถามเพิ่มข้อ 4

ุถามเพิ่ม

ถามเพิ่ม สงสัยอันนี้ 

```
apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: pingd
  name: pingd
  namespace: group-1
spec:
  #Max 2 Per Node 5 Node = 10
  replicas: 10
  selector:
    matchLabels:
      app: pingd
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: pingd
    spec:
      topologySpreadConstraints:
      #eveny node 2 pods
      - maxSkew: 2
        #topologyKey is the key of node labels. Nodes that have a label with this key and identical values are considered to be in the same topology
        #topologyKey: topology.kubernetes.io/region=proenhn
        topologyKey: node-name
        whenUnsatisfiable: DoNotSchedule
        labelSelector:
          matchLabels:
            app: pingd
      containers:
      - image: nginx
        name: nginx
        resources: {}
        #warmup 10 seconds
        #initialDelaySeconds + failureThreshold × periodSeconds
        startupProbe:
          httpGet:
            path: /
            port: 80
            scheme: HTTP
          initialDelaySeconds: 10
        #Restart every 1 minute
        livenessProbe:
          httpGet:
            path: /
            port: 10456
          initialDelaySeconds: 1
          periodSeconds: 60
          failureThreshold: 1
        #Traffic every 16 seconds
        readinessProbe:
          httpGet:
            path: /
            port: 80
          successThreshold: 1
          periodSeconds: 16
          failureThreshold: 4
      # affinity:
      #   nodeAffinity:
      #     requiredDuringSchedulingIgnoredDuringExecution:
      #       nodeSelectorTerms:
      #       - matchExpressions:
      #         - key: node-name
      #           operator: In
      #           values:
      #           - node-01
      #           - node-02
      #           - node-03
      #           - node-04
      #           - node-05
      tolerations:
        - key: "node"
          operator: "Equal"
          value: "no1"
          effect: "NoSchedule"
        - key: "node"
          operator: "Equal"
          value: "no2"
          effect: "NoSchedule"
        - key: "node"
          operator: "Equal"
          value: "no3"
          effect: "NoSchedule"
        - key: "node"
          operator: "Equal"
          value: "no4"
          effect: "NoSchedule"
        - key: "node"
          operator: "Equal"
          value: "no5"
          effect: "NoSchedule"
status: {}
```
จะ Error บาง 2 pod Pod พอ Describbe ออกมา 
```
Warning  FailedScheduling  2m9s  

- default-scheduler  0/9 nodes are available: 1 node(s) had untolerated taint {disktype: ssd}
                                            , 3 node(s) had untolerated taint {node-role.kubernetes.io/control-plane: }
                                            , 4 node(s) didn't match pod topology spread constraints
                                            , 4 node(s) didn't match pod topology spread constraints (missing required label). 

preemption: 0/9 nodes are available: 4 No preemption victims found for incoming pod, 5 Preemption is not helpful for scheduling.
```