This commit wires together the graceful delete option for pods
on the Kubelet. When a pod is deleted on the API server, a
grace period is calculated that is based on the
Pod.Spec.TerminationGracePeriodInSeconds, the user's provided grace
period, or a default. The grace period can only shrink once set.
The value provided by the user (or the default) is set onto metadata
as DeletionGracePeriod.
When the Kubelet sees a pod with DeletionTimestamp set, it uses the
value of ObjectMeta.GracePeriodSeconds as the grace period
sent to Docker. When updating status, if the pod has DeletionTimestamp
set and all containers are terminated, the Kubelet will update the
status one last time and then invoke Delete(pod, grace: 0) to
clean up the pod immediately.
The Spec.Host is set when binding a pod to a node and will contain the
canonical host name of the node. The Status.HostIP may not be included
in the node's server TLS certificate.
Makes it possible to access the following subresources:
/namespaces/<ns>/pods/<pod-name>[:port]/proxy
/namespaces/<ns>/pods/<pod-name>/exec?container=<container>&command=<cmd>
/namespaces/<ns>/pods/<pod-name>/portforward
Adds a Log subresource to Pod storage. The Log subresource implements
rest.GetterWithOptions and produces a ResourceStreamer resource that
will stream the log output from the pod's host node.
As per discussion with @snmarterclayton. I implemented this for most
types in the "obvious" way. I am not sure how to implement
this for a couple types, though.
This commit adds support to core resources to enable deferred deletion
of resources. Clients may optionally specify a time period after which
resources must be deleted via an object sent with their DELETE. That
object may define an optional grace period in seconds, or allow the
default "preferred" value for a resource to be used. Once the object
is marked as pending deletion, the deletionTimestamp field will be set
and an etcd TTL will be in place.
Clients should assume resources that have deletionTimestamp set will
be deleted at some point in the future. Other changes will come later
to enable graceful deletion on a per resource basis.
PUT /api/v1beta3/namespaces/default/pods/foo/status
{
"metadata": {...}, // allowed for valid values
"spec": {}, // ignored
"status": {...}, // allowed, except for Host
}
Exposes the simplest possibly change. Needs a slight refactoring
to RESTUpdateStrategy to split merging which can be done in a
follow up.
Also make sure all POST operations return 201 by default.
Removes the remainder of the asych logic in RESTStorage and
leaves it up to the API server to expose that behavior.
If a client says they want the name to be generated, a 409 is
not appropriate (since they didn't specify a name). Instead, we
should return the next most appropriate error, which is a 5xx
error indicating the request failed but the client *should* try
again. Since there is no 5xx error that exactly fits this purpose,
use 500 with StatusReasonTryAgainLater set.
This commit does not implement client retry on TryAgainLater, but
clients should retry up to a certain number of times.
