cgroups

Docker warning on cgroup swap limit, memory.use_hierarchy

由 本小妞迷上赌 提交于 2021-02-07 12:39:48
问题 I am getting this warning from 'sudo docker -d': WARNING: Your kernel does not support cgroup swap limit. even after following the steps (as in this link): modify below lines in /etc/default/grub (I did both for good measure) RUB_CMDLINE_LINUX_DEFUALT="cgroup_enable=memory swapaccount=1" GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1" and then update-grub/reboot via sudo update-grub; sudo reboot My questions are: 1) Should I be worried about this warning? I think I should be because I

What is the relationship between cpu.shares and cpu.cfs_quota_us in context of cgroup?

由 你。 提交于 2021-02-07 09:57:39
问题 I'm using centos6/7 and using cgroup to manage cpu resources. I have read through the RHEL document but have no answer to my question below: If I set both cfs_quota_us and shares among cgroups, then what will happen? (e.g. will cfs_quota_us take precedence over shares?) Thank you in anticipation! 回答1: My understanding is that for the same level of two cgroups (only), e.g.: foo | +- bar | +- baz Then bar and baz will firstly share the cpu occupied on foo according to cpu.share . Let's say the

How to prevent Java from exceeding the container memory limits?

由 百般思念 提交于 2021-02-06 05:53:17
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 梦想的初衷 提交于 2021-02-06 05:52:23
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 允我心安 提交于 2021-02-06 05:51:02
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 為{幸葍}努か 提交于 2021-02-06 05:48:04
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 谁说胖子不能爱 提交于 2021-02-06 05:44:45
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 ぐ巨炮叔叔 提交于 2021-02-06 05:44:20
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

How to prevent Java from exceeding the container memory limits?

由 [亡魂溺海] 提交于 2021-02-06 05:43:11
问题 I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My question is : How can I configure Java to respect the set container limit and throw an OutOfMemoryException instead of trying to allocate beyond the limit and get its ass kicked by the host kernel? Update : I'm an experienced Java developer and have a fair understanding of the JVM. I know how to set

kubernetes 中的增强特性(Kubernetes Enhancement Proposal)

由 六眼飞鱼酱① 提交于 2021-02-02 12:54:04
kubernetes 增强特性(kep)是为了解决社区中的疑难问题而创建的一个项目，每一个增强特性都对 kubernetes 的部分功能有较大的影响，需要 kubernetes 项目下的多个组(SIG)协作开发，对应的特性通常要经过 alpha 、 beta 以及 GA 三个版本，所以每个方案的开发周期比较长，大多需要经过 9~10 个月才能完成，某些特性甚至已经讨论多年至今仍未开发完成，像 crd、dry-run、kubectl diff、pid limit 等已经开发完成的功能都是在 kep 中提出来的。本文会介绍几个比较重要的已经在 kep 中孵化的特性。 1、client-go 中对 resource 的操作支持传递 context 参数 该特性的目标： （1）支持请求超时以及取消请求的调用； （2）支持分布式追踪； 以下是新旧版本中用 client-go list deployment 方式的一个对比： // 老版本中的使用方式 deploymentList, _ := clientset.AppsV1().Deployments(apiv1.NamespaceDefault). List ( metav1.ListOptions{}) // 新版本中的使用方式 deploymentList, err := clientset.AppsV1().Deployments
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