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O'Reilly Platform
book
Kubernetes即学即用(第二版)
by
Brendan Burns
,
Joe Beda
,
Kelsey Hightower
June 2021
Intermediate to advanced
300 pages
5h 4m
Chinese
China Electric Power Press Ltd.
Content preview from
Kubernetes即学即用(第二版)
158
|
第
11
章
就像
Kubernetes
的其他资源一样,如果不使用标签选择器,则节点查询命令
将返回集群的所有节点:
$
kubectl get nodes
NAME STATUS AGE
k0-default-pool-35609c18-0xnl Ready 23m
k0-default-pool-35609c18-pol3 Ready 1d
k0-default-pool-35609c18-ydae Ready 1d
k0-default-pool-35609c18-z7tb Ready 1d
使用标签选择器可以根据标签过滤节点。如果想列出标签
ssd
等于
true
的节
点,则可以使用带有
--selector
标志的
kubectl get nodes
命令:
$
kubectl get nodes --selector ssd=true
NAME STATUS AGE
k0-default-pool-35609c18-z7tb Ready 1d
11.3.2
节点选择器
我们可以利用节点选择器限制
Pod
可以在
Kubernetes
集群中的哪些节点上运
行。你可以在创建守护进程集的时候,将节点选择器定义为
Pod
规范的一部分。
示例
11-2
中的守护进程集配置限定
NGINX
只能在拥有
ssd=true
标签集的节
点上运行。
示例
11-2
:
nginx-fast-storage.yaml
apiVersion: ...
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Publisher Resources
ISBN: 9787519856762