Upstream calico isn't doing that, and:
- this can cause throttling
- the cpu needed by calico is very cluster / workload dependent
- missing cpu limits will not starve other pods (unlike missing memory
requests), because the kernel scheduler will still gives priority to
other process in pods not exceeding their requests
Adds the ability to configure the Kubernetes API server with a structured authorization configuration file.
Structured AuthorizationConfiguration is a new feature in Kubernetes v1.29+ (GA in v1.32) that configures the API server's authorization modes with a structured configuration file.
AuthorizationConfiguration files offer features not available with the `--authorization-mode` flag, although Kubespray supports both methods and authorization-mode remains the default for now.
Note: Because the `--authorization-config` and `--authorization-mode` flags are mutually exclusive, the `authorization_modes` ansible variable is ignored when `kube_apiserver_use_authorization_config_file` is set to true. The two features cannot be used at the same time.
Docs: https://kubernetes.io/docs/reference/access-authn-authz/authorization/#configuring-the-api-server-using-an-authorization-config-file
Blog + Examples: https://kubernetes.io/blog/2024/04/26/multi-webhook-and-modular-authorization-made-much-easier/
KEP: https://github.com/kubernetes/enhancements/tree/master/keps/sig-auth/3221-structured-authorization-configuration
I tested this all the way back to k8s v1.29 when AuthorizationConfiguration was first introduced as an alpha feature, although v1.29 required some additional workarounds with `kubeadm_patches`, which I included in example comments.
I also included some example comments with CEL expressions that allowed me to configure webhook authorizers without hitting kubeadm 1.29+ issues that block cluster creation and upgrades such as this one: https://github.com/kubernetes/cloud-provider-openstack/issues/2575.
My workaround configures the webhook to ignore requests from kubeadm and system components, which prevents fatal errors from webhooks that are not available yet, and should be authorized by Node or RBAC anyway.
This avoids spurious failure with 'localhost'.
It should also be more correct the inventory contains uncached hosts
which are not in `k8s_cluster` and therefore should not be Kubespray
business.
(We still use hostvars for uncached hosts, because it's easier to select
on 'ansible_default_ipv4' that way and does not change the end result)
We use a lot of facts where variables are enough, and format too early,
which prevent reusing the variables in different contexts.
- Moves set_fact variables to the vars directory, remove unnecessary
intermediate variables, and render them at usage sites to only do logic
on native Ansible/Jinja lists.
- Use defaults/ rather than default filters for several variables.
This is needed for shutdown ordering: while at startup, it's not a
problem that containerd start before dbus (the dbus socket already
exists) it needs to shutdown before dbus to do its cleanup (asking
systemd via dbus to cleanup cgroups).
This is expected to be used in the command module this way:
command:
cmd: "{{ kubectl_apply_stdin }}"
stdin: <... rendered manifests > -> using the 'template' lookup plugin
in most cases.
The advantages over the kube plugin module integrated in kubespray
(which this should replace eventually):
- way easier to modify to take advantage of new features (server-side
apply for instance)
- no need for a separate template tasks + checking the result (which can
introduce problem if the first playbook runs encounters an error).
config_path was introduced in containerd 1.5.0, and registry.mirrors is
deprecated.
There is no reason to keep the old alternative, so just always use
config_path, and consequently remove the option.
* Add vars for configuring cilium IP load balancer pools and bgp peer policies
* Cilium 1.16+ Support - Add vars for configuring cilium bgpv2 api & handle cilium_kube_proxy_replacement unsupported values
When using
dns_upstream_forward_extra_opts:
prefer_udp: "" # the option as no value so use empty string to just
# put the key
This is rendered in the dns configmap as ($ for end-of-line)
...
prefer_udp $
...
Note the trailing space.
This triggers https://github.com/kubernetes/kubernetes/issues/36222,
which makes the configmap hardly readable when editing them manually or
simply putting them in a yaml file for inspection.
Trim the concatenation of option + value to get rid of any trailing
space.
