✨ enable kubeadm feature gates mutation #10154

adityabhatia · 2024-02-14T19:03:31Z

What this PR does / why we need it:

This PR aims at:

Enabling mutation of FeatureGates in webhooks
Updating the target field for FeatureGates in Kubeadm config map
Reducing the number of API calls to update Kubeadm config map to 1

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #10050

/area api

adityabhatia · 2024-02-14T19:10:26Z

/area api

adityabhatia · 2024-02-14T19:11:12Z

cc: @fabriziopandini

adityabhatia · 2024-02-14T23:25:51Z

/test pull-cluster-api-e2e-full-main

k8s-ci-robot · 2024-02-14T23:25:54Z

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adityabhatia · 2024-02-14T23:33:44Z

/test pull-cluster-api-e2e-main

neolit123

would FG mutations trigger a machine roll-out?

some FGs would only matter for different kubeadm commands, some of which are not used in CAPI.

i guess CAPI users would be required to understand what FGs can be a NO-OP for them?
e.g. one that is "kubeadm reset" or "kubeadm upgrade apply" specific.

controlplane/kubeadm/internal/controllers/fakes_test.go

controlplane/kubeadm/internal/controllers/upgrade.go

controlplane/kubeadm/internal/workload_cluster_test.go

adityabhatia · 2024-02-15T10:17:54Z

would FG mutations trigger a machine roll-out?

some FGs would only matter for different kubeadm commands, some of which are not used in CAPI.

i guess CAPI users would be required to understand what FGs can be a NO-OP for them? e.g. one that is "kubeadm reset" or "kubeadm upgrade apply" specific.

It does an automatic machine rollout, also mentioned here. I will double check this.

adityabhatia · 2024-02-15T10:37:55Z

/test pull-cluster-api-e2e-main

adityabhatia · 2024-02-15T15:23:16Z

/test pull-cluster-api-e2e-main

chrischdi · 2024-02-16T07:34:59Z

Looks like this adds a panic / nil pointer dereference:

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x187ad13]

goroutine 168 [running]:
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile.func1()
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:116 +0x1e5
panic({0x1d6e780?, 0x3585650?})
	runtime/panic.go:914 +0x21f
sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers.(*KubeadmControlPlaneReconciler).upgradeControlPlane(0x20eb3c3?, {0x23c8618, 0xc001d07dd0}, 0xc0023ea9a0, 0x2?)
	sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers/upgrade.go:91 +0x5f3
sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers.(*KubeadmControlPlaneReconciler).reconcile(0xc0004ce6e0?, {0x23c8618, 0xc001d07dd0}, 0xc0023ea9a0)
	sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers/controller.go:407 +0x1579
sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers.(*KubeadmControlPlaneReconciler).Reconcile(0xc0004ce6e0, {0x23c8618, 0xc001d07bc0}, {{{0xc0023cc4a6?, 0x0?}, {0xc0023cc4b0?, 0xc001fb0d08?}}})
	sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/controllers/controller.go:251 +0x994
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile(0x23cced0?, {0x23c8618?, 0xc001d07bc0?}, {{{0xc0023cc4a6?, 0xb?}, {0xc0023cc4b0?, 0x0?}}})
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:119 +0xb7
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler(0xc0004ce780, {0x23c8650, 0xc0003582d0}, {0x1e33aa0?, 0xc0016fe4a0?})
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:316 +0x3cc
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem(0xc0004ce780, {0x23c8650, 0xc0003582d0})
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:266 +0x1af
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2()
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:227 +0x79
created by sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2 in goroutine 201
	sigs.k8s.io/[email protected]/pkg/internal/controller/controller.go:223 +0x565

controlplane/kubeadm/internal/controllers/upgrade.go

adityabhatia · 2024-02-16T10:42:01Z

/retest

adityabhatia · 2024-02-16T10:53:52Z

/test pull-cluster-api-e2e-main

controlplane/kubeadm/internal/workload_cluster.go

controlplane/kubeadm/internal/controllers/upgrade.go

controlplane/kubeadm/internal/workload_cluster.go

controlplane/kubeadm/internal/workload_cluster_test.go

controlplane/kubeadm/internal/workload_cluster.go

fabriziopandini · 2024-02-19T17:39:15Z

controlplane/kubeadm/internal/workload_cluster_etcd.go

@@ -93,22 +93,24 @@ loopmembers:
 }

 // UpdateEtcdVersionInKubeadmConfigMap sets the imageRepository or the imageTag or both in the kubeadm config map.
-func (w *Workload) UpdateEtcdVersionInKubeadmConfigMap(ctx context.Context, imageRepository, imageTag string, version semver.Version) error {
- return w.updateClusterConfiguration(ctx, func(c *bootstrapv1.ClusterConfiguration) {
+func (w *Workload) UpdateEtcdVersionInKubeadmConfigMap(imageRepository, imageTag string) func(*bootstrapv1.ClusterConfiguration, *[]string) {


I think we are missing something for etcd.
If I look at what the webhook allows to change, we can change everything both for local etcd and external etcd.

Instead here (and in UpdateEtcdExtraArgsInKubeadmConfigMap) we do not persist changes to:

etcd.local.DataDir

etcd.local.ServerCertSANs

etcd.local.PeerCertSANs

etcd.External.*

What about refactoring UpdateEtcdVersionInKubeadmConfigMap and UpdateEtcdExtraArgsInKubeadmConfigMap into UpdateEtcdLocalInKubeadmConfigMap (+ filling the gaps) and adding a new UpdateEtcdExternalInKubeadmConfigMap to be called from controlplane/kubeadm/internal/controllers/upgrade.go?

Sounds good, we can additionally persist all local and external properties of etcd in the config map.
Since this requires a refactoring to the current methods and subsequently the interface as well (and tests), it makes sense to combine it with the interface clean-up addressed here IMHO #10154 (comment), wdyt? I can take this up directly after this issues is closed.

let's tackle this in this PR (thinking about a potential backport in the 1.6 branch)

adityabhatia · 2024-02-20T20:07:08Z

/test pull-cluster-api-e2e-main

fabriziopandini · 2024-02-22T11:33:17Z

/lgtm
@chrischdi do you have time for a final pass?

k8s-ci-robot · 2024-02-22T11:33:24Z

LGTM label has been added.

Git tree hash: 278f3645cf59d69dc575f439192a09a621799c61

chrischdi · 2024-02-22T11:51:20Z

controlplane/kubeadm/internal/workload_cluster_test.go

@@ -30,6 +30,7 @@ import (
 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 "sigs.k8s.io/controller-runtime/pkg/client"
 "sigs.k8s.io/controller-runtime/pkg/client/fake"
+ yaml2 "sigs.k8s.io/yaml"


Suggested change

yaml2 "sigs.k8s.io/yaml"

"sigs.k8s.io/yaml"

Let's alias the capi owned yaml package to utilyaml here (we already do so in other packages)

Also changed in other files, which are a part of this PR.

would not have been necessary but also does not hurt 👍

chrischdi · 2024-02-22T11:52:13Z

One last nit :-)

chrischdi · 2024-02-22T12:25:57Z

/approve

k8s-ci-robot · 2024-02-22T12:26:05Z

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fabriziopandini · 2024-02-22T12:42:24Z

/lgtm

k8s-ci-robot · 2024-02-22T12:42:29Z

LGTM label has been added.

Git tree hash: 91b6788c82d31056e1b3a78bb7094878283641d2

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enable kubeadm feature flags mutation

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fabriziopandini mentioned this pull request Feb 26, 2024

✨Simplify alternative control-plane implementation #10198

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jonathanmeier5 mentioned this pull request Feb 26, 2024

Disable ETCD Learner Mode aws/eks-anywhere#7669

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abhinavmpandey08 mentioned this pull request Feb 28, 2024

add capi patch to enable kubeadm feature flags mutation aws/eks-anywhere-build-tooling#2958

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sbueringer mentioned this pull request Apr 16, 2024

🌱 Release v1.7.0 #10440

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✨ enable kubeadm feature gates mutation #10154

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✨ enable kubeadm feature gates mutation #10154

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