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Extensible Userspace Proxy
This PR refactors the userspace proxy to allow for custom proxy socket implementations.
It changes the the ProxySocket interface to ensure that other packages can properly implement it (making sure all arguments are publicly exposed types, etc), and adds in a mechanism for an implementation to create an instance of the userspace proxy with a non-standard ProxySocket.
Custom ProxySockets are useful to inject additional logic into the actual proxying. For example, our idling proxier uses a custom proxy socket to hold connections and notify the cluster that idled scalable resources need to be woken up.
Also-Authored-By: Ben Bennett bbennett@redhat.com
Introduced chages:
1. Re-writing of the resolv.conf file generated by docker.
Cluster dns settings aren't passed anymore to docker api in all cases, not only for pods with host network:
the resolver conf will be overwritten after infra-container creation to override docker's behaviour.
2. Added new one dnsPolicy - 'ClusterFirstWithHostNet', so now there are:
- ClusterFirstWithHostNet - use dns settings in all cases, i.e. with hostNet=true as well
- ClusterFirst - use dns settings unless hostNetwork is true
- Default
Fixes#17406
Set the vpcID when dummy is created (+1 squashed commit)
Squashed commits:
[0b1ac6e83e] Use the VPC flag and KubernetesClusterTag as identifier (+1 squashed commit)
Squashed commits:
[962bc56e38] Remove again availabilityZone and fix naming (+1 squashed commit)
Squashed commits:
[e3d1b41807] Use the VCID flag as identifier (+1 squashed commit)
Squashed commits:
[5b99fe6243] Add flag for external master
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Add apps/v1beta1 deployments with new defaults
This pull introduces deployments under `apps/v1beta1` and fixes#23597 and #23304.
TODO:
* [x] - create new type `apps/v1beta1.Deployment`
* [x] - update kubectl (stop, scale)
* [ ] - ~~new `kubectl run` generator~~ - this will only duplicate half of generator code, I suggest replacing current to use new endpoint
* [ ] - ~~create extended tests~~ - I've added integration and cmd tests verifying new endpoints
* [ ] - ~~create `hack/test-update-storage-objects.sh`~~ - see above
This is currently blocked by https://github.com/kubernetes/kubernetes/pull/38071, due to conflicting name `v1beta1.Deployment`.
```release-note
Introduce apps/v1beta1.Deployments resource with modified defaults compared to extensions/v1beta1.Deployments.
```
@kargakis @mfojtik @kubernetes/sig-apps-misc
Automatic merge from submit-queue (batch tested with PRs 42316, 41618, 42201, 42113, 42191)
Make 'docker-email' optional on dockercfg secrets
It is not required for most username/password registries.
Fixes#41727
Automatic merge from submit-queue (batch tested with PRs 42316, 41618, 42201, 42113, 42191)
Fixing a couple of things in the example, and bumping docker version
**What this PR does / why we need it**:
Updates the Cassandra version, and fixes a couple of issues in the example documentation.
fixes#40435
Automatic merge from submit-queue (batch tested with PRs 42316, 41618, 42201, 42113, 42191)
[Kubemark] Add init container in hollow node for setting inotify limit of node to 200
Fixes#41713
Along with adding the init container, I also changed the manifest to a yaml as otherwise the entire init container annotation would have to be in a single line (with escaped characters), as json doesn't allow multi-line strings.
cc @kubernetes/sig-scalability-misc @wojtek-t @gmarek @Random-Liu
Automatic merge from submit-queue (batch tested with PRs 42316, 41618, 42201, 42113, 42191)
Support unqualified and partially qualified domain name in DNS query in Windows kube-proxy
**What this PR does / why we need it**:
In Windows container networking, --dns-search is not currently supported on Windows Docker. Besides, even with --dns-suffix, inside Windows container DNS suffix is not appended to DNS query names. That makes unqualified domain name or partially qualified domain name in DNS query not able to resolve.
This PR provides a solution to resolve unqualified domain name or partially qualified domain name in DNS query for Windows container in Windows kube-proxy. It uses well-known Kubernetes DNS suffix as well host DNS suffix search list to append to the name in DNS query. DNS packet in kube-proxy UDP stream is modified as appropriate.
This PR affects the Windows kube-proxy only.
**Special notes for your reviewer**:
This PR is based on top of Anthony Howe's commit 48647fb, 0e37f0a and 7e2c71f which is already included in the PR 41487. Please only review commit b9dfb69.
**Release note**:
```release-note
Add DNS suffix search list support in Windows kube-proxy.
```
This commit adds the staging repos to the GOPATH in
hack/verify-godeps.sh. This allows vendored librarys
to depend on staging repos and not break verify-godeps.
This also adds `hack/godep-restore.sh`, which acts like
`godep restore`, but sets the GOPATH appropriate as well.
This commit switches over the HPA controller to use the custom metrics
API. It also converts the HPA controller to use the generated client
in k8s.io/metrics for the resource metrics API.
In order to enable support, you must enable
`--horizontal-pod-autoscaler-use-rest-clients` on the
controller-manager, which will switch the HPA controller's MetricsClient
implementation over to use the standard rest clients for both custom
metrics and resource metrics. This requires that at the least resource
metrics API is registered with kube-aggregator, and that the controller
manager is pointed at kube-aggregator. For this to work, Heapster
must be serving the new-style API server (`--api-server=true`).
Automatic merge from submit-queue
This PR adds a new environmental variable ENABLE_CRI for customizing CRI
**What this PR does / why we need it**:
This PR adds a new environmental variable `ENABLE_CRI` for customizing CRI (e.g. switching between dockershim and dockertools) and sets `--enable-cri=true` by default.
**Which issue this PR fixes**
Fixes#42315.
**Release note**:
```release-note
NONE
```
Maybe we should also cherry-pick this to 1.6 branch.
cc @yujuhong @Random-Liu
Automatic merge from submit-queue
Fix update stage
This PR addressed following problems:
1. Removes comments from all staging godeps and makes sure that they are not placed there. This saves false positive during update when `Comment` field is cut by one digit.
2. Moves updating staging to a separate script (`hack/update-all-staging.sh`), `hack/update-all.sh` only runs verification of staging deps.
@sttts ptal
Automatic merge from submit-queue
Prevent caching empty discovery docs
If kubectl makes requests before a server fully initialized, it could cache bad discovery responses (results of a partially forbidden discovery call, etc)
This changes to only cache responses that included at least one group or resource so that total failure doesn't get cached for 5 minutes
Automatic merge from submit-queue
Extend experimental support to multiple Nvidia GPUs
Extended from #28216
```release-note
`--experimental-nvidia-gpus` flag is **replaced** by `Accelerators` alpha feature gate along with support for multiple Nvidia GPUs.
To use GPUs, pass `Accelerators=true` as part of `--feature-gates` flag.
Works only with Docker runtime.
```
1. Automated testing for this PR is not possible since creation of clusters with GPUs isn't supported yet in GCP.
1. To test this PR locally, use the node e2e.
```shell
TEST_ARGS='--feature-gates=DynamicKubeletConfig=true' FOCUS=GPU SKIP="" make test-e2e-node
```
TODO:
- [x] Run manual tests
- [x] Add node e2e
- [x] Add unit tests for GPU manager (< 100% coverage)
- [ ] Add unit tests in kubelet package
Automatic merge from submit-queue (batch tested with PRs 41921, 41695, 42139, 42090, 41949)
Rebase kube-proxy and debian-iptables on debian-base
**What this PR does / why we need it**:
Slimmer images are generally preferred, but it's a minor optimization. The larger advantage to this change is the reduced attack surface from removing unnecessary packages, and easier maintenance from sharing a common base image.
Size comparison:
```
gcr.io/google-containers/debian-iptables-amd64:v6 127.9 MB
gcr.io/google-containers/debian-iptables-amd64:v7 45.1 MB
```
**Which issue this PR fixes** https://github.com/kubernetes/kubernetes/issues/40248
**Special notes for your reviewer**:
Tested by deploying to a private test cluster and running the e2es. This will fail the jenkins builds until I push the `gcr.io/google-containers/debian-iptables-amd64:v7` image, which I will do once I have an LGTM.
**Release note**:
```release-note
Clean up the kube-proxy container image by removing unnecessary packages and files.
```
/cc @luxas @ixdy
Automatic merge from submit-queue (batch tested with PRs 41921, 41695, 42139, 42090, 41949)
Unify fake runtime helper in kuberuntime, rkt and dockertools.
Addresses https://github.com/kubernetes/kubernetes/pull/42081#issuecomment-282429775.
Add `pkg/kubelet/container/testing/fake_runtime_helper.go`, and change `kuberuntime`, `rkt` and `dockertools` to use it.
@yujuhong This is a small unit test refactoring PR. Could you help me review it?
Automatic merge from submit-queue (batch tested with PRs 41921, 41695, 42139, 42090, 41949)
AWS: Support shared tag `kubernetes.io/cluster/<clusterid>`
We recognize an additional cluster tag:
kubernetes.io/cluster/<clusterid>
This now allows us to share resources, in particular subnets.
In addition, the value is used to track ownership/lifecycle. When we
create objects, we record the value as "owned".
We also refactor out tags into its own file & class, as we are touching
most of these functions anyway.
```release-note
AWS: Support shared tag `kubernetes.io/cluster/<clusterid>`
```
Automatic merge from submit-queue (batch tested with PRs 41921, 41695, 42139, 42090, 41949)
kubeadm: join ux changes
**What this PR does / why we need it**: Update `kubeadm join` UX according to https://github.com/kubernetes/community/pull/381
**Which issue this PR fixes**: fixes # https://github.com/kubernetes/kubeadm/issues/176
**Special notes for your reviewer**: /cc @luxas @jbeda
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue
kubeadm: Turn off insecure apiserver access on localhost:8080
**What this PR does / why we need it**:
ref: https://github.com/kubernetes/kubeadm/issues/181
depends on: https://github.com/kubernetes/kubernetes/pull/41897
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
Insecure access to the API Server at localhost:8080 will be turned off in v1.6 when using kubeadm
```
@jbeda @liggitt @deads2k @pires @lukemarsden @mikedanese @errordeveloper
Automatic merge from submit-queue (batch tested with PRs 38676, 41765, 42103, 41833, 41702)
AWS: Skip instances that are taggged as a master
We recognize a few AWS tags, and skip over masters when finding zones
for dynamic volumes. This will fix#34583.
This is not perfect, in that really the scheduler is the only component
that can correctly choose the zone, but should address the common
problem.
```release-note
AWS: Do not consider master instance zones for dynamic volume creation
```
Automatic merge from submit-queue (batch tested with PRs 38676, 41765, 42103, 41833, 41702)
kubelet: cm: refactor QoS logic into seperate interface
This commit has no functional change. It refactors the QoS cgroup logic into a new `QOSContainerManager` interface to allow for better isolation for QoS cgroup features coming down the pike.
This is a breakout of the refactoring component of my QoS memory limits PR https://github.com/kubernetes/kubernetes/pull/41149 which will need to be rebased on top of this.
@vishh @derekwaynecarr
Automatic merge from submit-queue (batch tested with PRs 38676, 41765, 42103, 41833, 41702)
Support --context flag completion for kubectl
**What this PR does / why we need it**:
With this PR, `--context` flag completion is supported for kubectl.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
```
Automatic merge from submit-queue (batch tested with PRs 38676, 41765, 42103, 41833, 41702)
Update addons yaml files for converting tolerations to api fields.
Automatic merge from submit-queue (batch tested with PRs 41597, 42185, 42075, 42178, 41705)
Honor output formats in kubectl patch
Currently, output formats other than `-o name` are only honored when in `--local` mode.
This PR also prints the result from the server when in regular mode
Automatic merge from submit-queue (batch tested with PRs 41597, 42185, 42075, 42178, 41705)
stop spamming logs on restart of api server
**What this PR does / why we need it**:
This PR reduces an excessive amount of log spam on startup of any API server with larger amounts of content. We have experienced server restart times ~5 minutes that is a consequence of us tracing each directory in etcd during our initial decoding. This spams the journald process, and results in much of those messages getting rate limited and dropped, and making actual problems much harder to debug. This stops us logging discrete keys in favor of just knowing that an operation was slow for the particular object type (which is enough information!)
this PR also makes it so we know what trace operation was ended in our log messages!
sample log now:
```
Trace "decodeNodeList *[]api.PolicyBinding" (started 2017-02-20 22:20:33.98771112 +0000 UTC)
Decoded 10718 nodes
decodeNodeList *[]api.PolicyBinding [500ms] END
```
Automatic merge from submit-queue (batch tested with PRs 41597, 42185, 42075, 42178, 41705)
auto discovery CA for extension API servers
This is what the smaller pulls were leading to. Only the last commit is unique and I expect I'll still tweak some pod definitions, but this is where I was going.
@sttts @liggitt
Automatic merge from submit-queue (batch tested with PRs 41597, 42185, 42075, 42178, 41705)
Don't log context or full request URI due to security concerns
Automatic merge from submit-queue (batch tested with PRs 41597, 42185, 42075, 42178, 41705)
force rbd image unlock if the image is not used
**What this PR does / why we need it**:
Ceph RBD image could be locked if the host that holds the lock is down. In such case, the image cannot be used by other Pods.
The fix is to detect the orphaned locks and force unlock.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#31790
**Special notes for your reviewer**:
Note, previously, RBD volume plugin maps the image, mount it, and create a lock on the image. Since the proposed fix uses `rbd status` output to determine if the image is being used, the sequence has to change to: rbd lock checking (through `rbd lock list`), mapping check (through `rbd status`), forced unlock if necessary (through `rbd lock rm`), image lock, image mapping, and mount.
**Release note**:
```release-note
force unlock rbd image if the image is not used
```
