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CRI: add docs for sysctls
#34830 adds `sysctls` features in CRI, it is based on sandbox annotations, this PR adds docs for it.
@yujuhong @timstclair @jonboulle
No semantic changes, but a lot of shuffling of docstrings to make things
more consistent. In particular, standardise on the zeroth-article (i.e.
prefer `// Version` to `// The version`) and ending all docstrings with
periods.
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CRI: Add Status into CRI.
For https://github.com/kubernetes/kubernetes/issues/35701.
Fixes https://github.com/kubernetes/kubernetes/issues/35701.
This PR added a `Status` call in CRI, and the `RuntimeStatus` is defined as following:
``` protobuf
message RuntimeCondition {
// Type of runtime condition.
optional string type = 1;
// Status of the condition, one of true/false.
optional bool status = 2;
// Brief reason for the condition's last transition.
optional string reason = 3;
// Human readable message indicating details about last transition.
optional string message = 4;
}
message RuntimeStatus {
// Conditions is an array of current observed runtime conditions.
repeated RuntimeCondition conditions = 1;
}
```
Currently, only `conditions` is included in `RuntimeStatus`, and the definition is almost the same with `NodeCondition` and `PodCondition` in K8s api.
@yujuhong @feiskyer @bprashanth If this makes sense, I'll send a follow up PR to let dockershim return `RuntimeStatus` and let kubelet make use of it.
@yifan-gu @euank Does this make sense to rkt?
/cc @kubernetes/sig-node
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CRI: stop sandbox before removing it
Stopping a sandbox includes reclaiming the network resources. By always
stopping the sandbox before removing it, we reduce the possibility of leaking
resources in some corner cases.
Stopping a sandbox includes reclaiming the network resources. By always
stopping the sandbox before removing it, we reduce the possibility of leaking
resources in some corner cases.
The enum constants are not namespaced. The shorter, unspecifc names are likely
to cause naming conflicts in the future.
Also replace "SandBox" with "Sandbox" in the API.
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add UpdateRuntimeConfig interface
Expose UpdateRuntimeConfig interface in RuntimeService for kubelet to pass a set of configurations to runtime. Currently it only takes PodCIDR.
The use case is for kubelet to pass configs to runtime. Kubelet holds some config/information which runtime does not have, such as PodCIDR. I expect some of kubelet configurations will gradually move to runtime, but I believe cases like PodCIDR, which dynamically assigned by k8s master, need to stay for a while.
Per discussion on https://github.com/kubernetes/kubernetes/issues/33873.
Currently the mount name is not being used and also involves some
incorrect usage (sometimes it's referencing a mount name, sometimes
it's referecing a volume name), so we decide to remove it from CRI.
The port name is also not used, so remove it as well.
Kubernetes expects a brief CamelCase string as "Reason" and a human-readable
string as "Message" in the conatiner status. It is difficult for kubelet to
derive the other one if the runtime only provides one of the two fields.
Augment the API by adding the "Message" field.
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Kubelet: pass pod name/namespace/uid in new runtime API
First part of #30463.
Pass pod name/namespace/uid in new runtime API and change dockershim to build unique sandbox/container name based on them.
CC @yujuhong @euank @yifan-gu @kubernetes/sig-node
If the resource in the delete call does not exist, the runtime should
not return an error. This eliminates the need for kubelet to define a
resource "not found" error that every runtime has to return.
