mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-09-20 15:39:52 +00:00
ff3e84ad67
updating kubernetes to 1.28.0 in the main repo. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
120 lines
3.9 KiB
Go
120 lines
3.9 KiB
Go
/*
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Copyright 2023 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package environment
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import (
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"fmt"
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"strconv"
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"sync"
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"github.com/google/cel-go/cel"
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"github.com/google/cel-go/ext"
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"golang.org/x/sync/singleflight"
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"k8s.io/apimachinery/pkg/util/version"
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celconfig "k8s.io/apiserver/pkg/apis/cel"
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"k8s.io/apiserver/pkg/cel/library"
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)
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// DefaultCompatibilityVersion returns a default compatibility version for use with EnvSet
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// that guarantees compatibility with CEL features/libraries/parameters understood by
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// an n-1 version
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//
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// This default will be set to no more than n-1 the current Kubernetes major.minor version.
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//
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// Note that a default version number less than n-1 indicates a wider range of version
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// compatibility than strictly required for rollback. A wide range of compatibility is
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// desirable because it means that CEL expressions are portable across a wider range
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// of Kubernetes versions.
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func DefaultCompatibilityVersion() *version.Version {
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return version.MajorMinor(1, 27)
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}
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var baseOpts = []VersionedOptions{
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{
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// CEL epoch was actually 1.23, but we artificially set it to 1.0 because these
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// options should always be present.
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IntroducedVersion: version.MajorMinor(1, 0),
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EnvOptions: []cel.EnvOption{
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cel.HomogeneousAggregateLiterals(),
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// Validate function declarations once during base env initialization,
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// so they don't need to be evaluated each time a CEL rule is compiled.
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// This is a relatively expensive operation.
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cel.EagerlyValidateDeclarations(true),
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cel.DefaultUTCTimeZone(true),
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ext.Strings(ext.StringsVersion(0)),
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library.URLs(),
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library.Regex(),
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library.Lists(),
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},
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ProgramOptions: []cel.ProgramOption{
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cel.EvalOptions(cel.OptOptimize, cel.OptTrackCost),
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cel.CostLimit(celconfig.PerCallLimit),
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},
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},
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{
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IntroducedVersion: version.MajorMinor(1, 27),
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EnvOptions: []cel.EnvOption{
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library.Authz(),
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},
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},
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{
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IntroducedVersion: version.MajorMinor(1, 28),
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EnvOptions: []cel.EnvOption{
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cel.CrossTypeNumericComparisons(true),
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cel.OptionalTypes(),
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library.Quantity(),
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},
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},
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// TODO: switch to ext.Strings version 2 once format() is fixed to work with HomogeneousAggregateLiterals.
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}
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// MustBaseEnvSet returns the common CEL base environments for Kubernetes for Version, or panics
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// if the version is nil, or does not have major and minor components.
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//
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// The returned environment contains function libraries, language settings, optimizations and
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// runtime cost limits appropriate CEL as it is used in Kubernetes.
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//
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// The returned environment contains no CEL variable definitions or custom type declarations and
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// should be extended to construct environments with the appropriate variable definitions,
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// type declarations and any other needed configuration.
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func MustBaseEnvSet(ver *version.Version) *EnvSet {
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if ver == nil {
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panic("version must be non-nil")
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}
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if len(ver.Components()) < 2 {
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panic(fmt.Sprintf("version must contain an major and minor component, but got: %s", ver.String()))
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}
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key := strconv.FormatUint(uint64(ver.Major()), 10) + "." + strconv.FormatUint(uint64(ver.Minor()), 10)
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if entry, ok := baseEnvs.Load(key); ok {
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return entry.(*EnvSet)
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}
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entry, _, _ := baseEnvsSingleflight.Do(key, func() (interface{}, error) {
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entry := mustNewEnvSet(ver, baseOpts)
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baseEnvs.Store(key, entry)
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return entry, nil
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})
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return entry.(*EnvSet)
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}
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var (
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baseEnvs = sync.Map{}
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baseEnvsSingleflight = &singleflight.Group{}
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)
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