For file discovery, in case the user feeds a file for the CA
from the kubeconfig, make sure it's preloaded and embedded using
the new function EnsureCertificateAuthorityIsEmbedded().
This commit also applies cleanup:
- unroll validateKubeConfig() into ValidateConfigInfo() as this way
the default cluster can be re-used.
- in ValidateConfigInfo() reuse the variable config instead of creating
a new variable kubeconfig.
- make the Ensure* functions return descriptive errors instead of
wrapping the errors on the side of the callers.
Secure serving was already enabled for kube-controller-manager.
Do the same for kube-scheduler, by passing the flags
"authentication-kubeconfig" and "authorization-kubeconfig"
to the binary in the static Pod.
This change allows the scheduler to perform reviews on incoming
requests, such as:
- authentication.k8s.io/v1beta1 TokenReview
- authorization.k8s.io/v1 SubjectAccessReview
The authentication and authorization checks for "system:kube-scheduler"
users were previously enabled by PR 72491.
On local networks (such as the typical connection path between
control plane components) gzip compression increases CPU use and
end to end p99 latency rather than decreasing it. Disable compression
within the control plane components like a 1.15 cluster would be
configured.
Kube-proxy's iptables mode used to care whether utiliptables's
EnsureRule was able to use "iptables -C" or if it had to implement it
hackily using "iptables-save". But that became irrelevant when
kube-proxy was reimplemented using "iptables-restore", and no one ever
noticed. So remove that check.
- common_test.go: use constants.CurrentKubernetesVersion
- diff_test.go: write temporary files instead of using testdata.
this allows us to not have to bump kubernetesVersions in the
testdata files (now removed)
- policy_test.go: apply fixes to tests that were previously passing,
but a bump in constants.go breaks them. these tests now work
for any version.
ipvs `getProxyMode` test fails on mac as `utilipvs.GetRequiredIPVSMods`
try to reach `/proc/sys/kernel/osrelease` to find version of the running
linux kernel. Linux kernel version is used to determine the list of required
kernel modules for ipvs.
Logic to determine kernel version is moved to GetKernelVersion
method in LinuxKernelHandler which implements ipvs.KernelHandler.
Mock KernelHandler is used in the test cases.
Read and parse file is converted to go function instead of execing cut.
progagates the kubeadm FG to the individual k8scomponents
on the control-plane node.
* Note: Users who want to join worker nodes to the cluster
will have to specify the dual-stack FG to kubelet using the
nodeRegistration.kubeletExtraArgs option as part of their
join config. Alternatively, they can use KUBELET_EXTRA_ARGS.
kubeadm FG: kubernetes/kubeadm#1612
