Update the default CRI server #599

hickeyma · 2020-04-30T21:13:00Z

Currently, the default CRI server is dockershim. This is a deprecated server with cri-tools. Also, does it make sense to even have a default as the user should explicitly define it.

This PR adds containerd and cri-o to the default list and it checks each in order till one works. It also adds some logging that the defaults are being used. This at least provdes better usability to the user if they don't configure the server.

Closes #597

hickeyma · 2020-04-30T21:15:48Z

/assign @feiskyer

mikebrow

see comment

cmd/crictl/main_unix.go

cmd/crictl/main_windows.go

Feedback from kubernetes-sigs#599 (review) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

hickeyma · 2020-05-01T12:20:19Z

Thanks for the review and feedback @mikebrow. Updated and ready for review again.

mikebrow

see comment

cmd/crictl/main.go

feiskyer · 2020-05-02T13:07:15Z

Currently, the default CRI server is dockershim. This is a deprecated server with cri-tools. Also, does it make sense to even have a default as the user should explicitly define it.

I prefer we still use dockershim as the default CRI server because most Kubernetes users are still using dockershim. To switch to a different runtime, users could provide a config file for crictl.

This PR adds containerd and cri-o to the default list and it checks each in order till one works.

This would introduce a few seconds latency for containerd and crio. @hickeyma @mikebrow do you think this is ok for users?

I have another idea. @hickeyma @mikebrow what do you think if we add a sub-command to generate the config file based on runtime type?

mikebrow · 2020-05-02T14:50:45Z

Currently, the default CRI server is dockershim. This is a deprecated server with cri-tools. Also, does it make sense to even have a default as the user should explicitly define it.

I prefer we still use dockershim as the default CRI server because most Kubernetes users are still using dockershim. To switch to a different runtime, users could provide a config file for crictl.

This PR adds containerd and cri-o to the default list and it checks each in order till one works.

This would introduce a few seconds latency for containerd and crio. @hickeyma @mikebrow do you think this is ok for users?

I don't think the intention is to change the default, or introduce any additional latency for the default or configured options or cli options. Though it would be good to put out a warning that automatically using docker as the default is being deprecated, please use the config or cli option. We are heading into an era where two or more of these container runtimes will always be running and the customer won't know which he's using. The idea here was to add loud warning messages when there is no config or cli, and further add more warning when the default docker fails but there exists a running sock from another container runtime besides the default docker, then go ahead and use the backup.. but yes the wasted time trying docker.. is just wasted time if crio or containerd is desired by the user/developer thus loud complaining required. If preferred could even "fail" hard with the message you need to put ....sock in the config file.

I have another idea. @hickeyma @mikebrow what do you think if we add a sub-command to generate the config file based on runtime type?

There's a config sub-command that's supposed to have get and set options ala git config pattern... the get works the set isn't there. crictl config - Get and set crictl options

#602

feiskyer · 2020-05-04T12:49:05Z

@mikebrow thanks for the clarification.

Currently, the default CRI server is dockershim. This is a deprecated server with cri-tools. Also, does it make sense to even have a default as the user should explicitly define it. This PR adds `containerd` and `cri-o` to the default list and it checks each in order till one works. It also adds some looging that the defaults are being used. This at least provdes better usability to the user if they don't configure the server. Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

Feedback from kubernetes-sigs#599 (review) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

Feedback comment: kubernetes-sigs#599 (comment) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

hickeyma · 2020-05-05T13:44:15Z

Thanks for the reviews @feiskyer @mikebrow. Updated and ready for review again.

mikebrow

see comments/questions

cmd/crictl/main_unix.go

cmd/crictl/main.go

Recaftor to remove defaultRuntimeEndpoint as it is no longer necessary as its is replaced to use array of default endpoints if endpoints are not set Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

hickeyma · 2020-05-06T14:28:12Z

@mikebrow I did a refactor to tidy up the logic around default eps. Let me know what you think.

mikebrow

couple nits looking good!

docs/crictl.md

cmd/crictl/main.go

hickeyma · 2020-05-06T19:14:02Z

Thanks for review @mikebrow. Updated and ready for review again.

mikebrow

LGTM(Non-Binding)
Used it in a couple environments, very nice indeed.

hickeyma · 2020-05-06T19:38:48Z

Thanks for the reviews and feedback @mikebrow

Update following review on slack with mikebrow Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

hickeyma · 2020-05-07T07:08:42Z

@feiskyer This is updated and ready for review again.

feiskyer

Thanks

/lgtm
/approve

k8s-ci-robot · 2020-05-07T09:08:44Z

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mikebrow · 2020-05-07T12:10:25Z

seems github's link to travis state got out of whack again..

feiskyer · 2020-05-07T12:25:46Z

yep, let me merge this manually

hickeyma · 2020-05-07T12:33:04Z

Thanks @feiskyer and @mikebrow for sorting this and for the merger @feiskyer

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Update the default CRI server defaults #598

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hickeyma mentioned this pull request Apr 30, 2020

Should there be a default for the CRI server endpoint? #597

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Change defaults to be its own array

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Feedback from kubernetes-sigs#599 (review) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

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Change defaults to be its own array

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Feedback from kubernetes-sigs#599 (review) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

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Add flag to check that endpoints have been set

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Feedback comment: kubernetes-sigs#599 (comment) Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

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Remove defaultRuntimeEndpoint

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Recaftor to remove defaultRuntimeEndpoint as it is no longer necessary as its is replaced to use array of default endpoints if endpoints are not set Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

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Refactor following review

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Update following review on slack with mikebrow Signed-off-by: Martin Hickey <martin.hickey@ie.ibm.com>

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REQUEST: New membership for hickeyma kubernetes/org#2146

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crictl 1.19.0 fishworks/fish-food#918

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SergeyKanzhelev mentioned this pull request Jan 13, 2022

Remove dockershim from crictl #871

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afbjorklund mentioned this pull request Jan 13, 2022

[1.24] Remove dockershim from crictl code and docs #870

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Update the default CRI server #599

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Update the default CRI server #599

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