We still use it internally, but this does not need to be part of the
public API. Instead just have callers pass us the relevent listers and
we create our own resource manager.
* Move tracing exporter registration
This doesn't belong in the library and should be configured by the
consumer of the opencensus package.
* Rename `vkublet` package to `node`
`vkubelet` does not convey any information to the consumers of the
package.
Really it would be nice to move this package to the root of the repo,
but then you wind up with... interesting... import semantics due to the
repo name... and after thinking about it some, a subpackage is really
not so bad as long as it has a name that convey's some information.
`node` was chosen since this package deals with all the semantics of
operating a node in Kubernetes.
Do not enable leases by default in the node constructor.
Simplify node constructor to not require a lease client when leases may
not even be enabled.
Updates node status update interval to the kubelet default of 10s (was
5s in vk).
This moves the logic for re-creating the a missing node up into the CLI.
We can make this optional, but for now I've just preserved existing
functionality.
This makes the concept of a `Provider` wholely implemented in the cli
implementation in cmd/virtual-kubelet.
It allows us to slim down the interfaces used in vkubelet (and
vkubelet/api) to what is actually used there rather than a huge
interface that is only there to serve the CLI's needs.
* Add the /runningpods/ api endpoint
This adds an API endpoint from the kubelet (/runningpods/). It is
an endpoint on kubelet which is considered a "debug" endpoint, so
it might be worth exposing through the options, but by default
it is exposed in most k8s configs AFAICT.
All of Kubernetes logging is based on klog. Klog currently does
not output any logging information to logrus, so you're flying
somewhat blind to Kubernetes internals.
This exposes the full set of configurables that klog offers,
but decorates (prefixes) the klog configuration with "klog".
This adds two concepts, where one encompasses the other.
Startup timeout
Startup timeout is how long to wait for the entire kubelet
to get into a functional state. Right now, this only waits
for the pod informer cache for the pod controllerto become
in-sync with API server, but this could be extended to other
informers (like secrets informer).
Wait For Startup
This changes the behaviour of the virtual kubelet to wait
for the pod controller to start before registering the node.
It is to avoid the race condition where the node is registered,
but we cannot actually do any pod operations.
Clientset.Coordination is deprecated. We are meant to use the specific
version of the client: CoordinationV1beta1. Clientset.Coordination is
going to be removed in future versions of the client API.
When setting up the http server we return a cancel function to close all
the listeners down.
The issue here is we set the cancel function to nil and thereby cause a
panic when there is an error and the `defer` attempts to call cancel.
This fix just don't set a named return value for the cancel function to
make sure we don't overwrite it with a `return nil, err`.
This ensures that the `defer` can still call `cancel()`.
This cleans up the CLI code significantly.
Also makes some of this re-usable for providers who want to do so.
This also removes the main.go from the top of the tree of the repro,
instead moving it into cmd/virtual-kubelet.
This allows us to better utilize the package namespace (and e.g. mv the
`vkubelet` package to the top of the tree).
