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Kubernetes hyperkube infinte secrets mounts #26864

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pmoncadaisla opened this issue Jun 5, 2016 · 5 comments
Closed

Kubernetes hyperkube infinte secrets mounts #26864

pmoncadaisla opened this issue Jun 5, 2016 · 5 comments
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sig/storage Categorizes an issue or PR as relevant to SIG Storage.

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@pmoncadaisla
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Hi,

I'm experiencing a very slow behaviour of my Kubernetes cluster. Evrything starts OK, but passed hours everything starts to be very very slow.

I've noticed that executing "mount" I can see nearly infinite (thousands) mounts like these ones:

mount

Also, there seems to be a process called "findmnt" running:

findmnt

I'm using:

Docker: 1.6.2
Hyperkube: 1.2.1
Ubuntu: 14.04

dockerversion

kubectlversion

dist

I've tried to upgrade to:

Docker: 1.9.1
Hyperkube: 1.2.3

but the result was the same :(

I've also tried to run Kubernetes directly using the kubelet binary, outside Hyperkube, and everything seemed OK, no more infinite mounts, and good speed, but everything was planned to use Hyperkube, and also I really want to know what is going wrong.
@a-robinson a-robinson added the sig/node Categorizes an issue or PR as relevant to SIG Node. label Jun 5, 2016
@jason-kane
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This looks like a dupe of #25489

This was referenced Jun 10, 2016
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@dims
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dims commented Jun 10, 2016

and of #26996

@saad-ali saad-ali mentioned this issue Jul 13, 2016
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@pmorie
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pmorie commented Jul 25, 2016

This is a dupe, yes. Fundamentally the problem is that the mount point isn't propagating back into the mount ns of the container where the hyperkube process is running.

@jingxu97
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I think #27054 should fix the issue of infinite (thousands) mounts

@yujuhong yujuhong added team/cluster sig/storage Categorizes an issue or PR as relevant to SIG Storage. and removed sig/node Categorizes an issue or PR as relevant to SIG Node. labels Jul 26, 2016
@matchstick
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Closing. We believe 1.3.4 addresses this. Re-open if we are mistaken.

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@dims @pmorie @pmoncadaisla @jason-kane @a-robinson @yujuhong @jingxu97 @matchstick