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storage_classes.go
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/
storage_classes.go
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/*
Copyright 2021 Flant JSC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package hooks
import (
"fmt"
"regexp"
"sort"
"github.com/flant/addon-operator/pkg/module_manager/go_hook"
"github.com/flant/addon-operator/sdk"
"github.com/tidwall/gjson"
storagev1 "k8s.io/api/storage/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
type StorageClass struct {
Name string `json:"name"`
Type string `json:"type"`
IopsPerGB string `json:"iopsPerGB,omitempty"`
Iops string `json:"iops,omitempty"`
Throughput string `json:"throughput,omitempty"`
}
var defaultStorageClasses = []StorageClass{
{
Name: "gp3",
Type: "gp3",
},
{
Name: "gp2",
Type: "gp2",
},
{
Name: "sc1",
Type: "sc1",
},
{
Name: "st1",
Type: "st1",
},
}
var _ = sdk.RegisterFunc(&go_hook.HookConfig{
OnBeforeHelm: &go_hook.OrderedConfig{Order: 20},
Kubernetes: []go_hook.KubernetesConfig{
{
Name: "module_storageclasses",
ApiVersion: "storage.k8s.io/v1",
Kind: "StorageClass",
LabelSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{"heritage": "deckhouse"},
},
FilterFunc: applyModuleStorageClassesFilter,
},
},
}, storageClasses)
func applyModuleStorageClassesFilter(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var sc = &storagev1.StorageClass{}
err := sdk.FromUnstructured(obj, sc)
if err != nil {
return nil, fmt.Errorf("cannot convert kubernetes object: %v", err)
}
return sc, nil
}
func excludeCheck(regexps []*regexp.Regexp, storageClassName string) bool {
for _, r := range regexps {
if r.MatchString(storageClassName) {
return true
}
}
return false
}
func storageClasses(input *go_hook.HookInput) error {
provision := input.Values.Get("cloudProviderAws.storageClass.provision").Array()
provisionExcludeNames := make([]gjson.Result, 0, len(provision))
for _, sc := range provision {
provisionExcludeNames = append(provisionExcludeNames, sc.Get("name"))
}
var provisionRegexps []*regexp.Regexp
// compile regular expressions
for _, excludePattern := range provisionExcludeNames {
var r, err = regexp.Compile(excludePattern.String())
if err != nil {
return err
}
provisionRegexps = append(provisionRegexps, r)
}
var storageClassesFilteredProvision []StorageClass
for _, storageClass := range defaultStorageClasses {
if !excludeCheck(provisionRegexps, storageClass.Name) {
storageClassesFilteredProvision = append(storageClassesFilteredProvision, storageClass)
}
}
for _, sc := range provision {
storageClassesFilteredProvision = append(storageClassesFilteredProvision, StorageClass{
Name: sc.Get("name").String(),
Type: sc.Get("type").String(),
Iops: sc.Get("iops").String(),
IopsPerGB: sc.Get("iopsPerGB").String(),
Throughput: sc.Get("throughput").String(),
})
}
excludeStorageClasses := input.Values.Get("cloudProviderAws.storageClass.exclude").Array()
var excludeRegexps []*regexp.Regexp
// compile regular expressions
for _, excludePattern := range excludeStorageClasses {
var r, err = regexp.Compile(excludePattern.String())
if err != nil {
return err
}
excludeRegexps = append(excludeRegexps, r)
}
var storageClassesFiltered []StorageClass
for _, storageClass := range storageClassesFilteredProvision {
if !excludeCheck(excludeRegexps, storageClass.Name) {
storageClassesFiltered = append(storageClassesFiltered, storageClass)
}
}
sort.Slice(storageClassesFiltered, func(i, j int) bool {
return storageClassesFiltered[i].Name < storageClassesFiltered[j].Name
})
if len(storageClassesFiltered) != 0 {
input.Values.Set("cloudProviderAws.internal.storageClasses", storageClassesFiltered)
} else {
input.Values.Set("cloudProviderAws.internal.storageClasses", []StorageClass{})
}
if input.Values.Exists("cloudProviderAws.storageClass.default") {
input.Values.Set("cloudProviderAws.internal.defaultStorageClass", input.Values.Get("cloudProviderAws.storageClass.default").String())
} else {
input.Values.Remove("cloudProviderAws.internal.defaultStorageClass")
}
var existedStorageClasses []StorageClass
for _, v := range input.Snapshots["module_storageclasses"] {
sc := v.(*storagev1.StorageClass)
existedStorageClasses = append(existedStorageClasses, StorageClass{
Name: sc.Name,
Type: sc.Parameters["type"],
Iops: sc.Parameters["iops"],
IopsPerGB: sc.Parameters["iopsPerGB"],
Throughput: sc.Parameters["throughput"],
})
}
for _, sc := range existedStorageClasses {
if !isModified(storageClassesFiltered, sc) {
continue
}
input.LogEntry.Infof("Deleting storageclass/%s because its parameters has been changed", sc.Name)
input.PatchCollector.Delete("storage.k8s.io/v1", "StorageClass", "", sc.Name)
}
return nil
}
func isModified(storageClasses []StorageClass, storageClass StorageClass) bool {
for _, sc := range storageClasses {
if sc.Name == storageClass.Name && sc != storageClass {
return true
}
}
return false
}