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feat: introduce support for Kubernetes version compatibility checks
This allows to enable/disable features based on Kubernetes version. Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| // Package compatibility provides some a way to enable/disable features based on Kubernetes version. | ||
| package compatibility | ||
|
|
||
| import ( | ||
| "strings" | ||
|
|
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| "github.com/blang/semver/v4" | ||
| "github.com/google/go-containerregistry/pkg/name" | ||
| ) | ||
|
|
||
| // Version is the Kubernetes version to have running. | ||
| type Version semver.Version | ||
|
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| // String returns the string representation of the version. | ||
| func (v Version) String() string { | ||
| return semver.Version(v).String() | ||
| } | ||
|
|
||
| // latest is used if the version can't be parsed. | ||
| var latest = Version{ | ||
| Major: 1, | ||
| Minor: 99, | ||
| } | ||
|
|
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| // VersionFromImageRef parses container image ref to return just Kubernetes version. | ||
| // | ||
| // If the version can't be parsed, assume latest version. | ||
| func VersionFromImageRef(imageRef string) Version { | ||
| // try to parse as tagged | ||
| ref, err := name.NewTag(imageRef) | ||
| if err != nil { | ||
| // try to cut digest part | ||
| var ok bool | ||
|
|
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| imageRef, _, ok = strings.Cut(imageRef, "@") | ||
|
|
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| if ok { | ||
| ref, err = name.NewTag(imageRef) | ||
| } | ||
|
|
||
| if err != nil { | ||
| return latest | ||
| } | ||
| } | ||
|
|
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| v, err := semver.ParseTolerant(ref.TagStr()) | ||
| if err != nil { | ||
| return latest | ||
| } | ||
|
|
||
| return Version(v) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package compatibility_test | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/assert" | ||
|
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| "github.com/siderolabs/go-kubernetes/kubernetes/compatibility" | ||
| ) | ||
|
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| func TestVersionFromImageRef(t *testing.T) { | ||
| for _, test := range []struct { | ||
| name string | ||
| imageRef string | ||
|
|
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| expectedVersion compatibility.Version | ||
| }{ | ||
| { | ||
| name: "just tag", | ||
| imageRef: "k8s.gcr.io/kube-apiserver:v1.18.0", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 18}, | ||
| }, | ||
| { | ||
| name: "just tag 2", | ||
| imageRef: "ghcr.io/siderolabs/kubelet:v1.27.9", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 27, Patch: 9}, | ||
| }, | ||
| { | ||
| name: "tag and digest", | ||
| imageRef: "ghcr.io/siderolabs/kubelet:v1.27.9@sha256:3f226f5b385960e311f19d6c9c3ea1778e86e6ad2e98a7bbbf1b1a63fe963916", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 27, Patch: 9}, | ||
| }, | ||
| { | ||
| name: "only digest", | ||
| imageRef: "ghcr.io/siderolabs/kubelet@sha256:3f226f5b385960e311f19d6c9c3ea1778e86e6ad2e98a7bbbf1b1a63fe963916", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 99}, | ||
| }, | ||
| { | ||
| name: "no tag or digest", | ||
| imageRef: "ghcr.io/siderolabs/kubelet", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 99}, | ||
| }, | ||
| { | ||
| name: "invalid version", | ||
| imageRef: "ghcr.io/siderolabs/kubelet:alpha", | ||
|
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| expectedVersion: compatibility.Version{Major: 1, Minor: 99}, | ||
| }, | ||
| } { | ||
| t.Run(test.name, func(t *testing.T) { | ||
| actualVersion := compatibility.VersionFromImageRef(test.imageRef) | ||
| assert.Equal(t, test.expectedVersion, actualVersion) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
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| package compatibility | ||
|
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| import "github.com/blang/semver/v4" | ||
|
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| // SupportsKubeletConfigContainerRuntimeEndpoint returns true if kubelet supports ContainerRuntimEndpoint in kubelet config. | ||
| func (v Version) SupportsKubeletConfigContainerRuntimeEndpoint() bool { | ||
| // see https://github.com/kubernetes/kubernetes/pull/112136 | ||
| return semver.Version(v).GTE(semver.Version{Major: 1, Minor: 27}) | ||
| } | ||
|
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| // FeatureFlagSeccompDefaultEnabledByDefault returns true if a SeccompDefault feature flag is enabled by default. | ||
| func (v Version) FeatureFlagSeccompDefaultEnabledByDefault() bool { | ||
| // see https://github.com/kubernetes/kubernetes/pull/110805 | ||
| return semver.Version(v).GTE(semver.Version{Major: 1, Minor: 25}) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
|
||
| package compatibility_test | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
|
|
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| "github.com/siderolabs/go-kubernetes/kubernetes/compatibility" | ||
| ) | ||
|
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| func TestFeatures(t *testing.T) { | ||
| for _, test := range []struct { | ||
| versions []compatibility.Version | ||
|
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| expectedSupportsKubeletConfigContainerRuntimeEndpoint bool | ||
| expectedFeatureFlagSeccompDefaultEnabledByDefault bool | ||
| }{ | ||
| { | ||
| versions: []compatibility.Version{ | ||
| {Major: 1, Minor: 24}, | ||
| }, | ||
|
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| expectedSupportsKubeletConfigContainerRuntimeEndpoint: false, | ||
| expectedFeatureFlagSeccompDefaultEnabledByDefault: false, | ||
| }, | ||
| { | ||
| versions: []compatibility.Version{ | ||
| {Major: 1, Minor: 25}, | ||
| {Major: 1, Minor: 26}, | ||
| }, | ||
| expectedSupportsKubeletConfigContainerRuntimeEndpoint: false, | ||
| expectedFeatureFlagSeccompDefaultEnabledByDefault: true, | ||
| }, | ||
| { | ||
| versions: []compatibility.Version{ | ||
| {Major: 1, Minor: 27}, | ||
| {Major: 1, Minor: 28}, | ||
| {Major: 1, Minor: 29}, | ||
| {Major: 1, Minor: 99}, | ||
| }, | ||
| expectedSupportsKubeletConfigContainerRuntimeEndpoint: true, | ||
| expectedFeatureFlagSeccompDefaultEnabledByDefault: true, | ||
| }, | ||
| } { | ||
| for _, version := range test.versions { | ||
| t.Run(version.String(), func(t *testing.T) { | ||
| assert.Equal(t, test.expectedSupportsKubeletConfigContainerRuntimeEndpoint, version.SupportsKubeletConfigContainerRuntimeEndpoint()) | ||
| assert.Equal(t, test.expectedFeatureFlagSeccompDefaultEnabledByDefault, version.FeatureFlagSeccompDefaultEnabledByDefault()) | ||
| }) | ||
| } | ||
| } | ||
| } |