d04abdf422
* Laying down kubernetes middleware foundation * Duplicated a bunch of code form etcd middleware * Duplicated code hacked to compile and load as a separate middleware * Adding verbose build option to Makefile * Removing stubzone and tls support tls and stubzone support was carried over from base etcd middleware code. Removing to simplify the kube middleware implementation. (For now.) * Adding conf directory for sample conf files * Removing stubzone support from query handler * Remove upstream and proxy from k8s corefile. Not sure that upstream or proxy makes sense for a k8s backed zone. * Comment out use of singleflight serialization * Removing parsing support for "upstream" directive from k8s * Removing upstream directive parsing code * Removing CNAME and TXT lookup implementation * Create README.md Brain-dump of DNS record name assembly and open work items. * Adding notes about wildcard handling * Adding basic k8s API client * Fleshing out methods on k8s connector * Remove PathPrefix from middleware init * Removing incorrect plural * Adding brute-force k8s service lookup functions * Initializing k8s API connector during startup * Hacking around to call k8s connector * Parsing incoming domain name into serviceName and namespace * Improving and simplifying k8s zone matching and label segmentation * Removing unused functions carried over from etcd middleware * Adding basic return of k8s data to DNS client * updated debugging println statements to flag with "[debug]" * removed code in kubernetes.go::Records that was a hold-over from etcd middleware. * Removed some random exploratory hacking. * Minior README.md updates * Updating with demo instructions * Updating README.md with CoreFile and removing completed TODO items * Updating conf file and README to reflect DNS response cache works * Disabling DNS response caching * Adding debug statement on entry to Records() * Changing port number in exampes to port 53. * Misc style and clarity changes * Removing empty function definitions * Adding comment to track future cleanup * Refactoring README to follow style of other middleware * Exposing dataobject field (typo)
110 lines
2.8 KiB
Go
110 lines
2.8 KiB
Go
package k8sclient
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import (
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"encoding/json"
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"net/http"
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)
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func getJson(url string, target interface{}) error {
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r, err := http.Get(url)
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if err != nil {
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return err
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}
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defer r.Body.Close()
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return json.NewDecoder(r.Body).Decode(target)
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}
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// Kubernetes Resource List
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type ResourceList struct {
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Kind string `json:"kind"`
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GroupVersion string `json:"groupVersion"`
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Resources []resource `json:"resources"`
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}
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type resource struct {
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Name string `json:"name"`
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Namespaced bool `json:"namespaced"`
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Kind string `json:"kind"`
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}
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// Kubernetes NamespaceList
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type NamespaceList struct {
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Kind string `json:"kind"`
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APIVersion string `json:"apiVersion"`
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Metadata apiListMetadata `json:"metadata"`
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Items []nsItems `json:"items"`
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}
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type apiListMetadata struct {
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SelfLink string `json:"selfLink"`
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resourceVersion string `json:"resourceVersion"`
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}
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type nsItems struct {
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Metadata nsMetadata `json:"metadata"`
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Spec nsSpec `json:"spec"`
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Status nsStatus `json:"status"`
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}
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type nsMetadata struct {
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Name string `json:"name"`
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SelfLink string `json:"selfLink"`
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Uid string `json:"uid"`
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ResourceVersion string `json:"resourceVersion"`
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CreationTimestamp string `json:"creationTimestamp"`
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}
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type nsSpec struct {
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Finalizers []string `json:"finalizers"`
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}
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type nsStatus struct {
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Phase string `json:"phase"`
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}
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// Kubernetes ServiceList
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type ServiceList struct {
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Kind string `json:"kind"`
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APIVersion string `json:"apiVersion"`
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Metadata apiListMetadata `json:"metadata"`
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Items []ServiceItem `json:"items"`
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}
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type ServiceItem struct {
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Metadata serviceMetadata `json:"metadata"`
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Spec serviceSpec `json:"spec"`
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// Status serviceStatus `json:"status"`
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}
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type serviceMetadata struct {
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Name string `json:"name"`
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Namespace string `json:"namespace"`
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SelfLink string `json:"selfLink"`
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Uid string `json:"uid"`
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ResourceVersion string `json:"resourceVersion"`
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CreationTimestamp string `json:"creationTimestamp"`
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// labels
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}
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type serviceSpec struct {
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Ports []servicePort `json:"ports"`
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ClusterIP string `json:"clusterIP"`
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Type string `json:"type"`
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SessionAffinity string `json:"sessionAffinity"`
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}
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type servicePort struct {
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Name string `json:"name"`
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Protocol string `json:"protocol"`
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Port int `json:"port"`
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TargetPort int `json:"targetPort"`
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}
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type serviceStatus struct {
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LoadBalancer string `json:"loadBalancer"`
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}
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