Instead of the individual error and return, it's better to aggregate all
the errors so that we can fix them all at once.
Take the chance to fix some comments, since kubeadm are not checking that
the certs are equal across controlplane.
Signed-off-by: Dave Chen <dave.chen@arm.com>
The addition of output/v1alpha2 made the converter-gen require
an explicit converter for:
kubeadm/v1beta2.BootstrapToken -> bootstraptoken/v1.BootstrapToken.
Add this converter under kubeadm/v1beta.
Use the converter in output/v1alpha1.
* De-share the Handler struct in core API
An upcoming PR adds a handler that only applies on one of these paths.
Having fields that don't work seems bad.
This never should have been shared. Lifecycle hooks are like a "write"
while probes are more like a "read". HTTPGet and TCPSocket don't really
make sense as lifecycle hooks (but I can't take that back). When we add
gRPC, it is EXPLICITLY a health check (defined by gRPC) not an arbitrary
RPC - so a probe makes sense but a hook does not.
In the future I can also see adding lifecycle hooks that don't make
sense as probes. E.g. 'sleep' is a common lifecycle request. The only
option is `exec`, which requires having a sleep binary in your image.
* Run update scripts
The API is a copy of output/v1alpha1 with a minor difference
where output/v1alpha2.BootstrapToken embeds
bootstraptoken/v1.BootstrapToken instead of
kubeadm/v1beta2.BootstrapToken.
Embedding the later is an undesired binding between the "kubeadm"
and "output" groups, preventing the eventual deprecation and removal
of the kubeadm.v1beta2 API.
This new output API version, unlike v1alpha1, does not include
defaulting which is not needed.
Panicing if not running in a test and if the component-base/version
variables are empty is not ideal. At some point sections
of kubeadm could be exposed as a library and if these sections
import the constants package, they would panic on the library
users unless they set the version information in component-base
with ldflags.
Instead:
- If the component-base version is empty, return a placeholder version
that should indicate to users that build kubeadm that something is not
right (e.g. they did not use 'make'). During library usage or unit
tests this version should not be relevant.
- Update unit tests to use hardcoded versions instead of the versions
from the constants package. Using the constants package for testing
is good but during unit tests these versions are already placeholders
since unit tests do not populate the actual component-base versions
(e.g. 1.23).
Tests under /app and /test would fail if the current/minimum k8s version
is dynamically populated from the version in the kubeadm binary.
Adapt the tests to support that.
Kubeadm requires manual version updates of its current supported k8s
control plane version and minimally supported k8s control plane and
kubelet versions every release cycle.
To avoid that, in constants.go:
- Add the helper function getSkewedKubernetesVersion() that can be
used to retrieve a MAJOR.(MINOR+n).0 version of k8s. It currently
uses the kubeadm version populated in "component-base/version" during
the kubeadm build process.
- Use the function to set existing version constants (variables).
Update util/config/common.go#NormalizeKubernetesVersion() to
tolerate the case where a k8s version in the ClusterConfiguration
is too old for the kubeadm binary to use during code freeze.
Include unit tests for the new utilities.
