Ansible剧本等到所有Pod都在运行 [英] Ansible playbook wait until all pods running

问题描述

我有一个有趣的(工作中)剧本，它查看kubectl get pods -o json的输出，直到Pod处于Running状态.现在，我想将其扩展到多个吊舱.核心问题是kubectl查询的json结果是一个列表，我知道如何访问第一个项目，但不是所有项目...

I have this ansible (working) playbook that looks at the output of kubectl get pods -o json until the pod is in the Running state. Now I want to extend this to multiple pods. The core issue is that the json result of the kubectl query is a list, I know how to access the first item, but not all of the items...

- name: wait for pods to come up
  shell: kubectl get pods -o json
  register: kubectl_get_pods
  until: kubectl_get_pods.stdout|from_json|json_query('items[0].status.phase') == "Running"
  retries: 20

json对象看起来像

The json object looks like,

[  { ...  "status": { "phase": "Running" } },
   { ...  "status": { "phase": "Running" } },
   ...
]

使用[0]访问用于处理列表中一个对象的第一个项目，但是我不知道如何将其扩展到多个项目.我尝试了[*]无效的方法.

Using [0] to access the first item worked for handling one object in the list, but I can't figure out how to extend it to multiple items. I tried [*] which did not work.

推荐答案

我会尝试类似的方法(对我有用):

I would try something like this (works for me):

tasks:
- name: wait for pods to come up
  shell: kubectl get pods -o json
  register: kubectl_get_pods
  until: kubectl_get_pods.stdout|from_json|json_query('items[*].status.phase')|unique == ["Running"]

基本上，您将获得所有Pod的所有状态并将它们组合到一个唯一列表中，然后直到该列表为["Running"]时，它才能完成.因此，例如，如果您所有的Pod都没有运行，您将得到类似["Running", "Starting"]的信息.

You are basically getting all the statuses for all the pods and combining them into a unique list, and then it won't complete until that list is ["Running"]. So for example, if all your pods are not running you will get something like ["Running", "Starting"].

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