• 通过标签绑定 

spec:  nodeSelector:    bigdata-node: bigdata  containers:    - env:

pod只能运行在有bigdata-node: bigdata 标签的node节点

• 通过node name绑定

spec:  nodeName: test-oc08  containers:    - env:

pod只能运行在名为test-oc08节点上

 

• node的亲和力

apiVersion: v1kind: Podmetadata:  name: with-node-affinityspec:  affinity:    nodeAffinity:  #节点选择      requiredDuringSchedulingIgnoredDuringExecution: #定义必要规则        nodeSelectorTerms:        - matchExpressions:          - key: e2e-az-NorthSouth  #必须匹配的键/值对（标签）            operator: In             values:            - e2e-az-North #必须匹配的键/值对（标签            - e2e-az-South   containers:  - name: with-node-affinity    image: docker.io/ocpqe/hello-pod

该规则要求将pod放置在节点上，且节点的标签的关键字是e2e-az-NorthSouth，其值是e2e-az-North或者e2e-az-South

apiVersion: v1kind: Podmetadata:  name: with-node-affinityspec:  affinity:    nodeAffinity:       preferredDuringSchedulingIgnoredDuringExecution: #定义首选规则      - weight: 1  #权重        preference:          matchExpressions:          - key: e2e-az-EastWest             operator: In             values:            - e2e-az-East             - e2e-az-West   containers:  - name: with-node-affinity    image: docker.io/ocpqe/hello-pod

该节点具有标签的关键字为e2e-az-EastWest且其值为e2e-az-East或者e2e-az-West是该Pod的首选项的节点

•  pod间亲和性和反亲和性

apiVersion: v1kind: Podmetadata:  name: with-pod-affinityspec:  affinity:    podAffinity: #亲和性      requiredDuringSchedulingIgnoredDuringExecution:       - labelSelector:          matchExpressions:          - key: security             operator: In             values:            - S1         topologyKey: failure-domain.beta.kubernetes.io/zone  containers:  - name: with-pod-affinity    image: docker.io/ocpqe/hello-pod

pod必须部署在一个节点上，这个节点上至少有一个正在运行的pod，这个pod中security=S1

apiVersion: v1kind: Podmetadata:  name: with-pod-antiaffinityspec:  affinity:    podAntiAffinity: #反亲和性      preferredDuringSchedulingIgnoredDuringExecution:       - weight: 100         podAffinityTerm:          labelSelector:            matchExpressions:            - key: security               operator: In               values:              - S2           topologyKey: kubernetes.io/hostname  containers:  - name: with-pod-affinity    image: docker.io/ocpqe/hello-pod

pod不太会部署在一个节点上，这个节点上正在运行的pod中有security=S2

• node的污点和

NoSchedule  #新pod不会被调到该节点，已经存在的pod不会影响

PreferNoSchedule #新pod尽量避免不会调度到该节点，已经存在的pod不会影响

NoExecute  #新pod不会被调到该节点，已经存在的pod将会被删除

spec:  taints:  - effect: NoSchedule    key: key1    timeAdded: null    value: value1

给节点添加污点

spec:  tolerations:  - key: "key1"    operator: "Equal"    value: "value1"    effect: "NoSchedule"

pod容忍污点