* add snapd_refresh config and handlers to k8s-master and -worker
* lint readmes
* add snapd_refresh doc to the readme; make "max" less specific
* adjust wording to note snapd_refresh only affects store snaps
Automatic merge from submit-queue (batch tested with PRs 65301, 65291, 65307, 63845, 65313). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Add option to control SSL chain completion
**What this PR does / why we need it**:
This adds templated support to the kubernetes-worker juju charm for the --enable-ssl-chain-completion option on the ingress proxy. It defaults to false, to ensure that production sites are not reliant on OCSP or DNS in order to function.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
kubernetes-worker juju charm: Added support for setting the --enable-ssl-chain-completion option on the ingress proxy. "action required": if your installation relies on supplying incomplete certificate chains and using OCSP to fill them in, you must set "ingress-ssl-chain-completion" to "true" in your juju configuration.
```
layer-nvidia-cuda does the hardware detection and sets a state that the
worker can react to.
When gpu is available, worker updates config and restarts kubelet to
enable gpu mode. Worker then notifies master that it's in gpu mode via
the kube-control relation.
When master sees that a worker is in gpu mode, it updates to privileged
mode and restarts kube-apiserver.
The kube-control interface has subsumed the kube-dns interface
functionality.
An 'allow-privileged' config option has been added to both worker and
master charms. The gpu enablement respects the value of this option;
i.e., we can't enable gpu mode if the operator has set
allow-privileged="false".
This branch includes a rollup series of commits from a fork of the
kubernetes repository pre 1.5 release because we didn't make the code freeze.
This additional effort has been fully tested and has results submit into
the gubernator to enhance confidence in this code quality vs. the single
layer, posing as both master/node.
To reference the gubernator results, please see:
https://k8s-gubernator.appspot.com/builds/canonical-kubernetes-tests/logs/kubernetes-gce-e2e-node/
Apologies in advance for the large commit, however we did not want to
submit without having successful upstream automated testing results.
This commit includes:
- Support for CNI networking plugins
- Support for durable storage provided by ceph
- Building from upstream templates (read: kubedns - no more template
drift!)
- An e2e charm-layer to make running validation tests much simpler/repeatable
- Changes to support the 1.5.x series of kubernetes
Additional note: We will be targeting -all- future work against upstream
so large pull requests of this magnitude will not occur again.
