mirror of
https://github.com/eliasstepanik/caddy-ingess.git
synced 2026-01-10 20:18:28 +00:00
93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
package k8s
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import (
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"github.com/caddyserver/caddy/v2"
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"github.com/mitchellh/mapstructure"
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"github.com/pkg/errors"
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v12 "k8s.io/api/core/v1"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/tools/cache"
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)
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// ConfigMapOptions represents global options set through a configmap
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type ConfigMapOptions struct {
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Debug bool `json:"debug,omitempty"`
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AcmeCA string `json:"acmeCA,omitempty"`
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Email string `json:"email,omitempty"`
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ProxyProtocol bool `json:"proxyProtocol,omitempty"`
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Metrics bool `json:"metrics,omitempty"`
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OnDemandTLS bool `json:"onDemandTLS,omitempty"`
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OnDemandRateLimitInterval caddy.Duration `json:"onDemandTLSRateLimitInterval,omitempty"`
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OnDemandRateLimitBurst int `json:"onDemandTLSRateLimitBurst,omitempty"`
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OnDemandAsk string `json:"onDemandTLSAsk,omitempty"`
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}
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type ConfigMapHandlers struct {
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AddFunc func(obj *v12.ConfigMap)
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UpdateFunc func(oldObj, newObj *v12.ConfigMap)
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DeleteFunc func(obj *v12.ConfigMap)
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}
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type ConfigMapParams struct {
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Namespace string
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InformerFactory informers.SharedInformerFactory
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ConfigMapName string
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}
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func isControllerConfigMap(cm *v12.ConfigMap, name string) bool {
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return cm.GetName() == name
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}
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func WatchConfigMaps(options ConfigMapParams, funcs ConfigMapHandlers) cache.SharedIndexInformer {
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informer := options.InformerFactory.Core().V1().ConfigMaps().Informer()
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informer.AddEventHandler(cache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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cm, ok := obj.(*v12.ConfigMap)
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if ok && isControllerConfigMap(cm, options.ConfigMapName) {
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funcs.AddFunc(cm)
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}
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},
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UpdateFunc: func(oldObj, newObj interface{}) {
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oldCM, ok1 := oldObj.(*v12.ConfigMap)
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newCM, ok2 := newObj.(*v12.ConfigMap)
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if ok1 && ok2 && isControllerConfigMap(newCM, options.ConfigMapName) {
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funcs.UpdateFunc(oldCM, newCM)
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}
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},
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DeleteFunc: func(obj interface{}) {
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cm, ok := obj.(*v12.ConfigMap)
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if ok && isControllerConfigMap(cm, options.ConfigMapName) {
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funcs.DeleteFunc(cm)
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}
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},
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})
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return informer
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}
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func ParseConfigMap(cm *v12.ConfigMap) (*ConfigMapOptions, error) {
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// parse configmap
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cfgMap := ConfigMapOptions{}
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config := &mapstructure.DecoderConfig{
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Metadata: nil,
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WeaklyTypedInput: true,
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Result: &cfgMap,
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TagName: "json",
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}
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decoder, err := mapstructure.NewDecoder(config)
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if err != nil {
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return nil, errors.Wrap(err, "unexpected error creating decoder")
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}
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err = decoder.Decode(cm.Data)
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if err != nil {
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return nil, errors.Wrap(err, "unexpected error parsing configmap")
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}
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return &cfgMap, nil
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}
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