mirror of
https://github.com/coredns/coredns.git
synced 2025-10-31 02:03:20 -04:00
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)
118 lines
2.3 KiB
Go
118 lines
2.3 KiB
Go
package k8sclient
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import (
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// "fmt"
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"net/url"
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)
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// API strings
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const (
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apiBase = "/api/v1"
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apiNamespaces = "/namespaces"
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apiServices = "/services"
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)
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// Defaults
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const (
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defaultBaseUrl = "http://localhost:8080"
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)
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type K8sConnector struct {
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baseUrl string
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}
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func (c *K8sConnector) SetBaseUrl(u string) error {
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validUrl, error := url.Parse(u)
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if error != nil {
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return error
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}
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c.baseUrl = validUrl.String()
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return nil
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}
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func (c *K8sConnector) GetBaseUrl() string {
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return c.baseUrl
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}
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func (c *K8sConnector) GetResourceList() *ResourceList {
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resources := new(ResourceList)
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error := getJson((c.baseUrl + apiBase), resources)
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if error != nil {
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return nil
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}
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return resources
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}
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func (c *K8sConnector) GetNamespaceList() *NamespaceList {
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namespaces := new(NamespaceList)
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error := getJson((c.baseUrl + apiBase + apiNamespaces), namespaces)
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if error != nil {
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return nil
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}
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return namespaces
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}
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func (c *K8sConnector) GetServiceList() *ServiceList {
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services := new(ServiceList)
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error := getJson((c.baseUrl + apiBase + apiServices), services)
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if error != nil {
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return nil
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}
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return services
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}
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func (c *K8sConnector) GetServicesByNamespace() map[string][]ServiceItem {
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// GetServicesByNamespace returns a map of namespacename :: [ kubernetesServiceItem ]
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items := make(map[string][]ServiceItem)
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k8sServiceList := c.GetServiceList()
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k8sItemList := k8sServiceList.Items
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for _, i := range k8sItemList {
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namespace := i.Metadata.Namespace
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items[namespace] = append(items[namespace], i)
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}
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return items
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}
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func (c *K8sConnector) GetServiceItemInNamespace(namespace string, servicename string) *ServiceItem {
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// GetServiceItemInNamespace returns the ServiceItem that matches servicename in the namespace
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itemMap := c.GetServicesByNamespace()
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// TODO: Handle case where namesapce == nil
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for _, x := range itemMap[namespace] {
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if x.Metadata.Name == servicename {
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return &x
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}
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}
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// No matching item found in namespace
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return nil
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}
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func NewK8sConnector(baseurl string) *K8sConnector {
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k := new(K8sConnector)
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k.SetBaseUrl(baseurl)
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return k
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}
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