This moves API handling into the node object so now everything can be
done in one place.
TLS is required.
In the current form, auth must be setup by the caller.
In 405d5d63b1 we changed for an ordered
list to a map, however the test is order dependent go maps are
randomized.
Change the test to use a slice with an internal type (instead of pulling
back in k8s.io/kubernetes).
Without this change this test will fail occasionally and has no
guarentee for success because of the random order of maps.
These are mostly helper code for setting up env vars. There is a single
file copied verbatim, although much of this downward api stuff is a
copy. We may want to pull this out and do a direct copy of the the code
so it is easier to update and work with upstream to have a shared
package that lives outside of k8s.io/kubernetes for downward api.
This drops another dependency on k8s.io/kubernetes.
This does have the unfortunate side effect that implementers will now
get a compile error until they update their code to use the new type.
Just as a note:
The stats types have moved to k8s.io/kubelet, however the stats types
are only there as of v1.20.
Currently we support older versions than v1.20, and even our go.mod
imports from v1.19.
For now we copy the types in. Later we can remove the type defs and
change them to type aliases to the k8s.io/kubelet types (which prevents
another compile time issue).
Anything relying on type assertions to determine if something implements
this method will, unfortunately, be broken and it will be hard to notice
until runtime. We need to make sure to call this out in the release
notes.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Our current retry policy is naive and only does 20 retries. It is
also based off of the rate limiter. If the user is somewhat aggressive in
rate limiting, but they have a temporary outage on API server, they
may want to continue to delay.
In facts, K8s has a built-in function to suggest delays:
https://pkg.go.dev/k8s.io/apimachinery/pkg/api/errors#SuggestsClientDelay
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
This is a fundamentally different API than that of the K8s workqueue
which is better suited for our needs. Specifically, we need a simple
queue which doesn't have complex features like delayed adds that
sit on "external" goroutines.
In addition, we need deep introspection into the operations of the
workqueue. Although you can get this on top of the K8s workqueue
by implementing a custom rate limiter, the problem is that
the underlying rate limiter's behaviour is still somewhat
opaque.
This basically has 100% code coverage.
Copy/paste some more kubernetes code. This is to remove the dep on
kubernetes/kubernetes from within exec.go
See #940
Signed-off-by: Miek Gieben <miek@miek.nl>
Try to stop depending on kubernetes/kubenetes. Copy golang/expansion
into the virtual-kubelet repo. The upstream code looks super stable, so
there is little harm to copy it here.
Signed-off-by: Miek Gieben <miek@miek.nl>
This refactor is a preparation for another commit. I want to add instrumentation
around our queues. The code of how queues were handled was spread throughout
the code base, and that made adding such instrumentation nice and complicated.
This centralizes the queue management logic in queue.go, and only requires
the user to provide a (custom) rate limiter, if they want to, a name,
and a handler.
The lease code is moved into its own package to simplify testing, because
the goroutine leak tester was triggering incorrectly if other tests
were running, and it was measuring leaks from those tests.
This also identified buggy behaviour:
wq := workqueue.NewNamedRateLimitingQueue(workqueue.DefaultItemBasedRateLimiter(), "test")
wq.AddRateLimited("hi")
fmt.Printf("Added hi, len: %d\n", wq.Len())
wq.Forget("hi")
fmt.Printf("Forgot hi, len: %d\n", wq.Len())
wq.Done("hi")
fmt.Printf("Done hi, len: %d\n", wq.Len())
---
Prints all 0s because event non-delayed items are delayed. If you call Add
directly, then the last line prints a len of 2.
// Workqueue docs:
// Forget indicates that an item is finished being retried. Doesn't matter whether it's for perm failing
// or for success, we'll stop the rate limiter from tracking it. This only clears the `rateLimiter`, you
// still have to call `Done` on the queue.
^----- Even this seems untrue
This refactors the v1 lease controller. It makes two functional differences
to the lease controller:
* It no longer ties lease updates to node pings or node status updates
* There is no fallback mechanism to status updates
This also moves vk_envtest, allowing for future brown-box testing of the
lease controller with envtest
We were having issues with golint not properly reporting declaration of functions
without proper documentation (comments). This is due to a config with golangci.
See: https://github.com/golangci/golangci-lint/issues/456
This moves node ping controller to using the new internal lock
API.
The reason for this is twofold:
* The channel approach that was used to notify other
controllers of changes could only be used once (at startup),
and couldn't be used in the future to broadcast node
ping status. The idea idea is here that we could move
to a sync.Cond style API and only wakeup other controllers
on change, as opposed to constantly polling each other
* The problem with sync.Cond is that it's not context friendly.
If we want to do stuff like wait on a sync.cond and use a context
or a timer or similar, it doesn't work whereas this API allows
context cancellations on condition change.
The idea is that as we have more controllers that act as centralized
sources of authority, they can broadcast out their state.
This configures the global logger the same as the local logger,
and adds the test name. It also uses the logger with the test
context as the context logger.
This copies and pastes the loop that used to exist in
func populateEnvironmentVariables(..) {
...
for _, env := range container.Env {
... <--- This code
}
}
Into getEnvironmentVariableValue. getEnvironmentVariableValue
returns val, err, where val is a pointer to a string
to indicate optionality.
I know it's not an impressive test. It just brings up a node, and
makes sure it registers. Let's do more in the future.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
This creates a new package -- podutils. The env var related code
doesn't really have any business being part of the node package,
and to create a separation of concerns, faster tests, and just
general code isolation and cleanliness, we can move the env
var related code into this package. This change is purely hygiene,
and not logic related.
For node, the package is under internal, because the constructor
references manager, which is an internal package.
This allows the use of a built-in provider to do things like mark a node
as ready once all the controllers are spun up.
The e2e tests now use this instead of waiting on the pod that the vk
provider is deployed in to be marked ready (this was waiting on
/stats/summary to be serving, which is racey).
* Rename VK to chewong for development purpose
* Rename basic_test.go to basic.go
* Add e2e.go and suite.go
* Disable tests in node.go
* End to end tests are now importable as a testing suite
* Remove 'test' from test files
* Add documentations
* Rename chewong back to virtual-kubelet
* Change 'Testing Suite' to 'Test Suite'
* Add the ability to skip certain testss
* Add unit tests for suite.go
* Add README.md for importable e2e test suite
* VK implementation has to be based on VK v1.0.0
* Stricter checks on validating test functions
* Move certain files back to internal folder
* Add WatchTimeout as a config field
* Add slight modifications
* Upgrade k8s.io/api
go get k8s.io/api@kubernetes-1.15.2
* Upgrade k8s.io/apimachinery
go get k8s.io/apimachinery@kubernetes-1.15.2
* Upgrade kubernetes-1.15.2
go get k8s.io/client-go@kubernetes-1.15.2
* Upgrade kk8s.io/kubernetes to v1.15.2
go get k8s.io/kubernetes@v1.15.2
This also locks the the dependency for
github.com/prometheus/client_golang/prometheus due to a golang bug, and to
please the validation scripts.
The replaces were generated by:
go get k8s.io/kubernetes@v1.15.2 2> fail
for i in $(cat fail|grep unknown|cut -f1 -d@|cut -f2 -d" ")
do echo "replace ${i} => ${i} kubernetes-1.15.2"
done
* 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.
