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operator: Replace deprecated ctrl-runtime cfg with custom package
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package v1 | ||
|
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| import ( | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
| "sync" | ||
|
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| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/apimachinery/pkg/runtime/serializer" | ||
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
|
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| configv1 "github.com/grafana/loki/operator/apis/config/v1" | ||
| ) | ||
|
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| var ( | ||
| errSchemeNotSupplied = errors.New("scheme not supplied to controller configuration loader") | ||
| errConfigFileLoading = errors.New("could not read file at path") | ||
| errRuntimeObjectDecoding = errors.New("could not decode file into runtime.Object") | ||
| ) | ||
|
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| // ControllerManagerConfiguration defines the functions necessary to parse a config file | ||
| // and to configure the Options struct for the ctrl.Manager. | ||
| type ControllerManagerConfiguration interface { | ||
| runtime.Object | ||
|
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| // Complete returns the versioned configuration | ||
| Complete() (configv1.ControllerManagerConfigurationSpec, error) | ||
| } | ||
|
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| // DeferredFileLoader is used to configure the decoder for loading controller | ||
| // runtime component config types. | ||
| type DeferredFileLoader struct { | ||
| ControllerManagerConfiguration | ||
| path string | ||
| scheme *runtime.Scheme | ||
| once sync.Once | ||
| err error | ||
| } | ||
|
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| // File will set up the deferred file loader for the configuration | ||
| // this will also configure the defaults for the loader if nothing is | ||
| // | ||
| // Defaults: | ||
| // * Path: "./config.yaml" | ||
| // * Kind: GenericControllerManagerConfiguration | ||
| func File() *DeferredFileLoader { | ||
| scheme := runtime.NewScheme() | ||
| utilruntime.Must(configv1.AddToScheme(scheme)) | ||
| return &DeferredFileLoader{ | ||
| path: "./config.yaml", | ||
| ControllerManagerConfiguration: &configv1.ControllerManagerConfiguration{}, | ||
| scheme: scheme, | ||
| } | ||
| } | ||
|
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| // Complete will use sync.Once to set the scheme. | ||
| func (d *DeferredFileLoader) Complete() (configv1.ControllerManagerConfigurationSpec, error) { | ||
| d.once.Do(d.loadFile) | ||
| if d.err != nil { | ||
| return configv1.ControllerManagerConfigurationSpec{}, d.err | ||
| } | ||
| return d.ControllerManagerConfiguration.Complete() | ||
| } | ||
|
|
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| // AtPath will set the path to load the file for the decoder. | ||
| func (d *DeferredFileLoader) AtPath(path string) *DeferredFileLoader { | ||
| d.path = path | ||
| return d | ||
| } | ||
|
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| // OfKind will set the type to be used for decoding the file into. | ||
| func (d *DeferredFileLoader) OfKind(obj ControllerManagerConfiguration) *DeferredFileLoader { | ||
| d.ControllerManagerConfiguration = obj | ||
| return d | ||
| } | ||
|
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| // loadFile is used from the mutex.Once to load the file. | ||
| func (d *DeferredFileLoader) loadFile() { | ||
| if d.scheme == nil { | ||
| d.err = errSchemeNotSupplied | ||
| return | ||
| } | ||
|
|
||
| content, err := os.ReadFile(d.path) | ||
| if err != nil { | ||
| d.err = fmt.Errorf("%w %s", errConfigFileLoading, d.path) | ||
| return | ||
| } | ||
|
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| codecs := serializer.NewCodecFactory(d.scheme) | ||
|
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| // Regardless of if the bytes are of any external version, | ||
| // it will be read successfully and converted into the internal version | ||
| if err = runtime.DecodeInto(codecs.UniversalDecoder(), content, d.ControllerManagerConfiguration); err != nil { | ||
| d.err = errRuntimeObjectDecoding | ||
| } | ||
| } |
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