June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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概论
｜
17
你可以通过
kubectl
列出集群中的
Event
对象。通过执行下面的命令，
你可以看到
kube-system
这个命名空间中曾经发生过的事件：
$
kubectl -n kube-system get events
LAST SEEN FIRST SEEN COUNT NAME KIND
3m 3m 1 kube-controller-manager-master.15932b6faba8e5ad Pod
3m 3m 1 kube-apiserver-master.15932b6fa3f3fbbc Pod
3m 3m 1 etcd-master.15932b6fa8a9a776 Pod
…
2m 3m 2 weave-net-7nvnf.15932b73e61f5bc6 Pod
2m 3m 2 weave-net-7nvnf.15932b73efeec0b3 Pod
2m 3m 2 weave-net-7nvnf.15932b73e8f7d318 Pod
如果你想了解有关事件的更多信息，请参考
Michael Gasch
的博客“
Events,
the DNA of Kubernetes
”，这篇文章中提供了更详尽的背景知识与例子。
1.4.3
边沿触发与水平触发
让我们先后退一步，从更高的抽象层次上看看应该如何在控制器中实现业务
逻辑，以及为何
Kubernetes
选择使用事件（即状态变化）来驱动其逻辑。
检测状态变化（也就是产生事件）有两种基本的方法： ...
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