Enforces more reasonable minimum TLS versions for Kubernetes components
(1.3 for everything except apiserver; 1.2 for API server for
interoperability).
Signed-off-by: Seán C McCord <ulexus@gmail.com>
The gist is that `kubelet` service code only manages the container
lifecycle, while `kubelet` configuration is managed now in the
controllers and resources.
New resources:
* `secrets.Kubelet` contains Kubelet PKI derived directly from the
machine configuration
* `k8s.KubeletConfig` contains Kubelet non-secret config derived
directly from the machine configuration
* `k8s.NodeIPConfig` contains configuration on picking up Node IP for
the kubelet (from machine configuration)
* `k8s.NodeIP` contains actual Node IPs picked from the node addresses
based on `NodeIPConfig`
* `k8s.KubeletSpec` contains final `kubelet` container configuration,
including merged arguments, KubeletConfig, etc. It is derived from
`KubeletConfig`, `Nodename` and `NodeIP`.
Final controller `KubeletServiceController` writes down configuration
and PKI to disk, and manages restart/start of the `kubelet` service
which is a pure wrapper around container lifecycle.
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
