Automatic merge from submit-queue (batch tested with PRs 40574, 40806, 40308, 40771, 39440)
kubeadm: kube-proxy needs to know the pod subnet CIDR
**What this PR does / why we need it**: `kube-proxy` 1.5 has a new flag `cluster-cidr` that isn't specified by `kubeadm`, thus resulting in bug https://github.com/kubernetes/kubeadm/issues/102.
**Which issue this PR fixes**: fixes https://github.com/kubernetes/kubeadm/issues/102
**Special notes for your reviewer**:
/cc @luxas @dmmcquay
Automatic merge from submit-queue (batch tested with PRs 38443, 40145, 40701, 40682)
Move kubeadm etcd SELinux options from container to pod.
**What this PR does / why we need it**:
Works around a bug that surfaces in Docker 1.12+ related to the pause
container's namespace and selinux labels being transferred to the etcd
container when it runs.
At present it appears that applying selinux options to a container may
be broken, or perhaps shouldn't be supported at all. Moving these to the
pod causes all containers (including pause) to run with the correct
labels.
**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**:
Related to and partial fix for https://github.com/kubernetes/kubeadm/issues/107
This is one of several selinux related fixes in flight for upcoming releases, and newer versions of Docker. To successfully run kubeadm with selinux enforcing right now would like require a recent container-selinux build as uncovered in https://github.com/kubernetes/kubeadm/issues/107, a bugfix for the format labels in #40179, and finally this fix.
**Release note**:
```release-note
Fixed an SELinux issue in kubeadm on Docker 1.12+ by moving etcd SELinux options from container to pod.
```
Works around a bug that surfaces in Docker 1.12+ related to the pause
container's namespace and selinux labels being transferred to the etcd
container when it runs.
At present it appears that applying selinux options to a container may
be broken, or perhaps shouldn't be supported at all. Moving these to the
pod causes all containers (including pause) to run with the correct
labels.
Automatic merge from submit-queue (batch tested with PRs 40132, 39302, 40194, 40619, 40601)
fix nil check and typos
**What this PR does / why we need it**:
1. nil error should be checked before defer statement.
2. fix some typos.
Signed-off-by: bruceauyeung ouyang.qinhua@zte.com.cn
Fix boilerplates, comments in the code and make the output of kubeadm more user-friendly
Start using HostPKIPath and KubernetesDir everywhere in the code, so they can be changed for real
More robust kubeadm reset code now.
Removed old glog-things from app.Run()
Renamed /etc/kubernetes/cloud-config.json to /etc/kubernetes/cloud-config since it shouldn't be a json file
Simplification of the code
Less verbose output from master/pki.go
Cleaned up dead code
Start a small logging/output framework:
- fmt.Println("[the-stage-here] Capital first letter of this message. Tell the user what the current state is")
- fmt.Printf("[the-stage-here] Capital first letter. Maybe a [%v] in the end if an error should be displayed. Always ends with \n")
- fmt.Errorf("Never starts with []. Includes a short error message plus the underlying error in [%v]. Never ends with \n")
Automatic merge from submit-queue (batch tested with PRs 38294, 37009, 36778, 38130, 37835)
Add a cloudprovider validator flag to kubeadm and update the DNS spec
Broken out from: https://github.com/kubernetes/kubernetes/pull/37568
This PR creates a flag for `cloud-provider` that validates the value before `RunInit()` is run, which makes it now act as a "real" flag
Then it removes the `k8s.io/kubernetes/pkg/cloudprovider` dependency, which makes the binary ~40MB smaller! That's _really_ worth it!
In the second commit, the DNS addon is updated to the latest version: https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/skydns-rc.yaml.base
@kubernetes/sig-cluster-lifecycle
The kube etcd and discovery pods are set to unconfined_t in
order to avoid disabling selinux, but the correct type for
an unconfined container is spc_t. For more information, see
http://danwalsh.livejournal.com/2016/10/03/.
Previously, GetEnvParams (now called SetEnvParams) had no way of being altered unless
it was through enviroment variables. These changes allow for a global
EnvParam to be set and also altered while still initally getting their value from
set enviroment variables. This change is especially helpful for testing
(see kubeadm/app/util/kubeconfig_test.go).
Automatic merge from submit-queue
Do not probe so aggressively which may lead to unnecessary restarts
@errordeveloper @mikedanese PTAL
I came across a case where etcd restarted about 5-10 times because the load was very high on the machine.
The load seems to have lead to that the `etcd` container occasionally didn't respond to the probe, which caused many restart and made the whole thing even worse.
Maybe we should remove the etcd probe totally? I don't know, what do you think?
This is at least a try to loosen the limits here...
