kubernetes - 如何使用 PodTemplate

Question

我看到有一个名为 PodTemplate 的对象，它有很少的 documentation .

提到:

Pod templates are pod specifications which are included in other objects, such as Replication Controllers, Jobs, and DaemonSets.

但我不确定如何在 Replication Controllers、Jobs 或 DaemonSets 上提及它。

我像这样创建了一个 PodTemplate:

kubectl apply -f - <<EOF
apiVersion: v1
kind: PodTemplate
metadata:
  name: pod-test
  namespace: default
template:
  metadata:
    name: pod-template
  spec:
    containers:
    - name: container
      image: alpine
      command: ["/bin/sh"]
      args: ["-c", "sleep 100"]
EOF

我想在 DaemonSet 中使用它，我该怎么做？

这是 DaemonSet YAML 的示例:

kubectl apply -f - <<EOF
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: pod-by-daemonset
  namespace: default
spec:
  selector:
    matchLabels:
      name: selector
  template:
    metadata:
      labels:
        name: selector
    spec:
      containers: # I don't want to specify it, I want to use the template.
      - name: container
        image: alpine 

EOF

Answer 1

有趣的是 page for DaemonSet给出了一个创建 DaemonSet 的例子，并说

the .spec.template is a pod template. It has exactly the same schema as a Pod, except it is nested and does not have an apiVersion or kind.

所以目的是在 DaemonSet 中内联 Pod 模式。

然而，确实有seem to have been a plan能够通过以下形式引用 PodTemplate:

TemplateRef:
Name: <templatename>

什么 seems to have happened from the trail on github是这种引用预定义的 PodTemplate 的方式被添加但未完成然后被删除。您可以尝试一下，但在我看来似乎只支持内联规范。