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脚本 `oom-stats.sh` 不能准确获取到oom pod UID

脚本 oom-stats.sh ，不能准确获取到oom pod UID, 因为 dmesg 中记录 oom 的格式不同，例如下面例子:

[root@k8s-node-1 ~]$ dmesg -LT|grep "killed as a result of limit"
[Wed Dec  4 16:07:17 2019] Task in /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28/6a0c141ff1c50e2a975a8499b653477353233775935a2fde3cd49e8f762b569a killed as a result of limit of /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28
[Thu Dec  5 06:56:17 2019] Task in /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28/6a2bc9e4bfb1cac09a1ee2b070276d5b734971ce967ac3613ea40cda02d1b09b killed as a result of limit of /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28
[Thu Dec  5 21:55:59 2019] Task in /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/774a781338903ee1b9b98444ee6148d8adebffb95d3d855c63c1fe1097dd48dc killed as a result of limit of /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/774a781338903ee1b9b98444ee6148d8adebffb95d3d855c63c1fe1097dd48dc
[Sun Dec  8 06:26:23 2019] Task in /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28/28e88c6f27936501d60702c7fc59db7ed7b0ad59a02cfccf5c0d93fbbe2f1b96 killed as a result of limit of /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28
[Mon Dec  9 10:56:05 2019] Task in /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/552956d0c60d3c1ed1f3175f0c53c138780070490d2331b3178173350aef14e5 killed as a result of limit of /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/552956d0c60d3c1ed1f3175f0c53c138780070490d2331b3178173350aef14e5
[Wed Dec 11 10:26:01 2019] Task in /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/aba7ff388de3e50e1597f755ce0a295db621666fc3799184eaf5868e28558322 killed as a result of limit of /kubepods/burstable/pod45c33744-15d9-11ea-8241-fa163e61e4f9/aba7ff388de3e50e1597f755ce0a295db621666fc3799184eaf5868e28558322
[Wed Jan 15 16:40:50 2020] Task in /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9/318a61d0fc9a37b17c460a50f10715583df9b863c556a1baff8429fa96ca72e7 killed as a result of limit of /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9
[Wed Jan 15 16:40:50 2020] Task in /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9/42fb39f778174e76d11540471abab25487b29682a0fcd12d0957db298e140697 killed as a result of limit of /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9
[Wed Jan 15 16:41:28 2020] Task in /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9/7e15fa8569bcb643c4f2b624312d6c95c672b19bb0070666bcbeee4634c37367 killed as a result of limit of /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9
[Wed Jan 15 16:41:28 2020] Task in /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9/94a79ff4ea30403f86f2fcad33e9a10cd9e7ce09f425e5e6cce4d9fb3ae9cd9d killed as a result of limit of /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9
  • 大致分为 2 种格式
[Wed Dec  4 16:07:17 2019] Task in /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28/6a0c141ff1c50e2a975a8499b653477353233775935a2fde3cd49e8f762b569a killed as a result of limit of /kubepods/burstable/pod8e128ada-0f35-11ea-86d1-fa163eb8dd28

[Wed Jan 15 16:41:28 2020] Task in /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9/7e15fa8569bcb643c4f2b624312d6c95c672b19bb0070666bcbeee4634c37367 killed as a result of limit of /kubepods/poda14c17a1-3773-11ea-8241-fa163e61e4f9

需要修改脚本 oom-stats.sh ，通过正则表达式，匹配到正确的 oom pod UID

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