?nodeSelector 強制匹配

?指定pod 調度到標簽 ssd

[root@k8s-master cka3]# cat ssd.yaml apiVersion: v1 kind: Pod metadata:name: nginx-kusc00401 spec:containers:- name: nginximage: nginximagePullPolicy: IfNotPresentnodeSelector:disktype: ssd

?這里顯示親和性不夠

?

?我們現在給節點加上標簽：kubectl label nodes <node-name>? <node-key>=<label-value>

[root@k8s-master cka3]# kubectl label nodes k8s-node2 disktype=ssd node/k8s-node2 labeled

?再次查看調度成功

?-----------------------------------------------------------------------------------------------------------------------------

刪除標簽：

[root@k8s-master cka3]# kubectl label node k8s-node2 disktype- node/k8s-node2 labeled

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nodeAffinity: 調度分為軟性:嘗試滿足，但不保證（preferred）? 硬性：一定滿足 (required）

[root@k8s-master cka3]# cat test.yaml apiVersion: v1 kind: Pod metadata:name: with-node-affinity spec:affinity:nodeAffinity:requiredDuringSchedulingIgnoredDuringExecution:nodeSelectorTerms:- matchExpressions:- key: disktypeoperator: Invalues:- ssdpreferredDuringSchedulingIgnoredDuringExecution:- weight: 1preference:matchExpressions:- key: disktypeoperator: Invalues:- ssd2containers:- name: with-node-affinityimage: nginx

軟匹配不一定成功

?

?

總結

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