This change updates the CSR API to add a new, optional field called
expirationSeconds. This field is a request to the signer for the
maximum duration the client wishes the cert to have. The signer is
free to ignore this request based on its own internal policy. The
signers built-in to KCM will honor this field if it is not set to a
value greater than --cluster-signing-duration. The minimum allowed
value for this field is 600 seconds (ten minutes).
This change will help enforce safer durations for certificates in
the Kube ecosystem and will help related projects such as
cert-manager with their migration to the Kube CSR API.
Future enhancements may update the Kubelet to take advantage of this
field when it is configured in a way that can tolerate shorter
certificate lifespans with regular rotation.
Signed-off-by: Monis Khan <mok@vmware.com>
Given bootstraptoken/v1 is now a separate GV, there is no need
to duplicate the API and utilities inside v1beta3 and the internal
version.
v1beta2 must continue to use its internal copy due, since output/v1alpha1
embeds the v1beta2.BootstrapToken object. See issue 2427 in k/kubeadm.
- Make v1beta3 use bootstraptoken/v1 instead of local copies
- Make the internal API use bootstraptoken/v1
- Update validation, /cmd, /util and other packages
- Update v1beta2 conversion
Package bootstraptoken contains an API and utilities wrapping the
"bootstrap.kubernetes.io/token" Secret type to ease its usage in kubeadm.
The API is released as v1, since these utilities have been part of a
GA workflow for 10+ releases.
The "bootstrap.kubernetes.io/token" Secret type is also GA.
During "join" of new control plane machines, kubeadm would
download shared certificates and keys from the cluster stored
in a Secret. Based on the contents of an entry in the Secret,
it would use helper functions from client-go to either write
it as public key, cert (mode 644) or as a private key (mode 600).
The existing logic is always writing both keys and certs with mode 600.
Allow detecting public readable data properly and writing some files
with mode 644.
First check the data with ParsePrivateKeyPEM(); if this passes
there must be at least one private key and the file should be written
with mode 600 as private. If that fails, validate if the data contains
public keys with ParsePublicKeysPEM() and write the file as public
(mode 644).
As a result of this new logic, and given the current set of managed
kubeadm files, .key files will end up with 600, while .crt and .pub
files will end up with 644.
This change updates the backdating logic to only be applied to the
NotBefore date and not the NotAfter date when the certificate is
short lived. Thus when such a certificate is issued, it will not be
immediately expired. Long lived certificates continue to have the
same lifetime as before.
Consolidated all certificate lifetime logic into the
PermissiveSigningPolicy.policy method.
Signed-off-by: Monis Khan <mok@vmware.com>
Add {Init|Join}Configuration.Patches, which is a structure that
contains patch related options. Currently it only has the "Directory"
field which is the same option as the existing --experimental-patches
flag.
The flags --[experimental-]patches value override this value
if both a flag and config is passed during "init" or "join".
The feature of "patches" in kubeadm has been in Alpha for a few
releases. It has not received major bug reports from users.
Deprecate the --experimental-patches flag and add --patches.
Both flags are allowed to be mixed with --config.
When API Priority and Fairness is enabled, the inflight limits must
add up to something positive.
This rejects the configuration that prompted
https://github.com/kubernetes/kubernetes/issues/102885
Update help for max inflight flags
This adds the gate `SeccompDefault` as new alpha feature. Seccomp path
and field fallbacks are now passed to the helper functions, whereas unit
tests covering those code paths have been added as well.
Beside enabling the feature gate, the feature has to be enabled by the
`SeccompDefault` kubelet configuration or its corresponding
`--seccomp-default` CLI flag.
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
Apply suggestions from code review
Co-authored-by: Paulo Gomes <pjbgf@linux.com>
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
If the user has not specified a pull policy we must assume a default of
v1.PullIfNotPresent.
Add some extra verbose output to help users monitor what policy is
used and what images are skipped / pulled.
Use "fallthrough" and case handle "v1.PullAlways".
Update unit test.
