What does docker daemon do in kubernetes after container(s) is started?
I see that docker daemon use a lot of CPU. As I understand the kubelet and the dockerd communicate with each other to maintain the state of the cluster. But does dockerd for some reason do extra runtime work after containers are started that would spike CPU? To get information to report to kubelet?
docker
kubernetes edited Nov 12 '18 at 21:13
Rico
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asked Nov 12 '18 at 21:10
lucidquiet
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I see that docker daemon use a lot of CPU. As I understand the kubelet and the dockerd communicate with each other to maintain the state of the cluster. But does dockerd for some reason do extra runtime work after containers are started that would spike CPU? To get information to report to kubelet?
docker
kubernetes edited Nov 12 '18 at 21:13
Rico
26.5k94864
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
add a comment |
I see that docker daemon use a lot of CPU. As I understand the kubelet and the dockerd communicate with each other to maintain the state of the cluster. But does dockerd for some reason do extra runtime work after containers are started that would spike CPU? To get information to report to kubelet?
docker
kubernetes edited Nov 12 '18 at 21:13
Rico
26.5k94864
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
I see that docker daemon use a lot of CPU. As I understand the kubelet and the dockerd communicate with each other to maintain the state of the cluster. But does dockerd for some reason do extra runtime work after containers are started that would spike CPU? To get information to report to kubelet?
docker
kubernetes docker
kubernetes edited Nov 12 '18 at 21:13
Rico
26.5k94864
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
edited Nov 12 '18 at 21:13
Rico
26.5k94864
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
edited Nov 12 '18 at 21:13
Rico
26.5k94864
edited Nov 12 '18 at 21:13
Rico
26.5k94864
edited Nov 12 '18 at 21:13
Rico
26.5k94864
26.5k94864
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
asked Nov 12 '18 at 21:10
lucidquiet
2,44252961
2,44252961
add a comment |
add a comment |
1 Answer
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But does dockerd for some reason do extra runtime work after containers are started that would spike CPU?
Not really unless you have another container or process constantly calling the docker API or running a docker command from the CLI.
The kubelet talks to the docker daemon through a docker shim to do everything that it needs to run containers, so I would check if the kubelet is doing some extra works, maybe scheduling and then evicting/stopping containers.
answered Nov 12 '18 at 21:20
Rico
26.5k94864
add a comment |
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1 Answer
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1 Answer
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active
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But does dockerd for some reason do extra runtime work after containers are started that would spike CPU?
Not really unless you have another container or process constantly calling the docker API or running a docker command from the CLI.
The kubelet talks to the docker daemon through a docker shim to do everything that it needs to run containers, so I would check if the kubelet is doing some extra works, maybe scheduling and then evicting/stopping containers.
answered Nov 12 '18 at 21:20
Rico
26.5k94864
add a comment |
But does dockerd for some reason do extra runtime work after containers are started that would spike CPU?
Not really unless you have another container or process constantly calling the docker API or running a docker command from the CLI.
The kubelet talks to the docker daemon through a docker shim to do everything that it needs to run containers, so I would check if the kubelet is doing some extra works, maybe scheduling and then evicting/stopping containers.
answered Nov 12 '18 at 21:20
Rico
26.5k94864
add a comment |
But does dockerd for some reason do extra runtime work after containers are started that would spike CPU?
Not really unless you have another container or process constantly calling the docker API or running a docker command from the CLI.
The kubelet talks to the docker daemon through a docker shim to do everything that it needs to run containers, so I would check if the kubelet is doing some extra works, maybe scheduling and then evicting/stopping containers.
answered Nov 12 '18 at 21:20
Rico
26.5k94864
But does dockerd for some reason do extra runtime work after containers are started that would spike CPU?
Not really unless you have another container or process constantly calling the docker API or running a docker command from the CLI.
The kubelet talks to the docker daemon through a docker shim to do everything that it needs to run containers, so I would check if the kubelet is doing some extra works, maybe scheduling and then evicting/stopping containers.
answered Nov 12 '18 at 21:20
Rico
26.5k94864
answered Nov 12 '18 at 21:20
Rico
26.5k94864
answered Nov 12 '18 at 21:20
Rico
26.5k94864
answered Nov 12 '18 at 21:20
Rico
26.5k94864
26.5k94864
add a comment |
add a comment |
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