1.spec.template.spec.nodeSelector
如,只在node标签有 daemonset=true 的节点上运行pod:
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: ssd-monitor-nodelabel
namespace: controller-test
spec:
selector:
matchLabels:
app: ssd-monitor-nodelabel
template:
metadata:
labels:
app: ssd-monitor-nodelabel
spec:
nodeSelector:
daemonset: "true" # 有一些特殊的需要加""
containers:
- name: main
image: luksa/ssd-monitor
2.spec.template.spec.affinity
https://blog.csdn.net/kozazyh/article/details/112004365
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-hello-deployment
namespace: chenqiang-ns1
labels:
app: nginx-hello
spec:
replicas: 2
selector:
matchLabels:
app: nginx-hello
template:
metadata:
labels:
app: nginx-hello
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: tester
operator: NotIn
values:
- chenqiang
containers:
- name: nginx-hello
image: docker-registry.saicstack.com/chenqiang/nginx-hello:v2.0
ports:
- containerPort: 80
imagePullSecrets:
- name: regcred
pod中的例子
apiVersion: v1
kind: Pod
metadata:
name: with-node-affinity
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/e2e-az-name
operator: In
values:
- e2e-az1
- e2e-az2
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 1
preference:
matchExpressions:
- key: another-node-label-key
operator: In
values:
- another-node-label-value
containers:
- name: with-node-affinity
image: gcr.io/google_containers/pause:2.0
这条规则表示,pod可以被调度到标签key为“kubernetes.io/e2e-az-name”,值为“e2e-az1”或“e2e-az2”的节点。另外,在满足该条件的节点中,优先使用具有“another-node-label-key”标签,且至为“another-node-label-value”的节点。
这个 pod 同时定义了 requiredDuringSchedulingIgnoredDuringExecution 和 preferredDuringSchedulingIgnoredDuringExecution 两种 nodeAffinity。第一个要求 pod 运行在特定 AZ 的节点上,第二个希望节点最好有对应的 another-node-label-key:another-node-label-value 标签。
这里的匹配逻辑是label在某个列表中,可选的操作符有:
In: label的值在某个列表中
NotIn:label的值不在某个列表中
Exists:某个label存在
DoesNotExist:某个label不存在
Gt:label的值大于某个值(字符串比较)
Lt:label的值小于某个值(字符串比较)
如果nodeAffinity中nodeSelector有多个选项,节点满足任何一个条件即可;如果matchExpressions有多个选项,则节点必须同时满足这些选项才能运行pod 。
需要说明的是,node并没有anti-affinity这种东西,因为NotIn和DoesNotExist能提供类似的功能。
标签:node,name,spec,指定,label,daemonset,key,节点 From: https://www.cnblogs.com/regit/p/17644740.html