- 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: v1
kind: Pod
metadata:
name: with-node-affinity
spec:
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: v1
kind: Pod
metadata:
name: with-node-affinity
spec:
affinity:
nodeAffinity:
preferredDuringSchedulingIgnoredDuringExecution: #定义首选规则
- weight: #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: v1
kind: Pod
metadata:
name: with-pod-affinity
spec:
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: v1
kind: Pod
metadata:
name: with-pod-antiaffinity
spec:
affinity:
podAntiAffinity: #反亲和性
preferredDuringSchedulingIgnoredDuringExecution:
- weight:
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