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apiserver: add enable subresource options
Signed-off-by: Iceber Gu <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| package kubeapiserver | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/spf13/pflag" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| ) | ||
|
|
||
| type Options struct { | ||
| AllowedProxySubresources []string | ||
| } | ||
|
|
||
| func NewOptions() *Options { | ||
| return &Options{} | ||
| } | ||
|
|
||
| func (o *Options) AddFlags(fs *pflag.FlagSet) { | ||
| var resources []string | ||
| for r, srs := range supportedProxyCoreSubresources { | ||
| for _, sr := range srs { | ||
| resources = append(resources, r+"/"+sr) | ||
| } | ||
| } | ||
| fs.StringSliceVar(&o.AllowedProxySubresources, "allowed-proxy-subresources", o.AllowedProxySubresources, ""+ | ||
| "List of subresources that support proxying requests to the specified cluster, formatted as '[resource/subresource],[subresource],...'. "+ | ||
| fmt.Sprintf("Supported proxy subresources include %q", strings.Join(resources, ",")), | ||
| ) | ||
| } | ||
|
|
||
| var supportedProxyCoreSubresources = map[string][]string{ | ||
| "pods": {"proxy", "log", "exec", "attach", "portfowrd"}, | ||
| "nodes": {"proxy"}, | ||
| "services": {"proxy"}, | ||
| } | ||
|
|
||
| func (o *Options) Config() (*ExtraConfig, error) { | ||
| subresources := make(map[schema.GroupResource]sets.Set[string]) | ||
|
|
||
| for _, subresource := range o.AllowedProxySubresources { | ||
| var resource string | ||
| switch slice := strings.Split(strings.TrimSpace(subresource), "/"); len(slice) { | ||
| case 1: | ||
| subresource = slice[0] | ||
| case 2: | ||
| resource, subresource = slice[0], slice[1] | ||
| default: | ||
| return nil, fmt.Errorf("--allowed-proxy-subresources: invalid format %q", subresource) | ||
| } | ||
|
|
||
| var matched bool | ||
| for r, srs := range supportedProxyCoreSubresources { | ||
| for _, sr := range srs { | ||
| if (resource == "" || resource == r) && subresource == sr { | ||
| gr := schema.GroupResource{Group: "", Resource: r} | ||
| set := subresources[gr] | ||
| if set == nil { | ||
| set = sets.New[string]() | ||
| subresources[gr] = set | ||
| } | ||
| set.Insert(sr) | ||
| matched = true | ||
| break | ||
| } | ||
| } | ||
| } | ||
| if !matched { | ||
| return nil, fmt.Errorf("--allowed-proxy-subresources: unsupported subresources or invalid format %q", subresource) | ||
| } | ||
| } | ||
| return &ExtraConfig{AllowedProxySubresources: subresources}, nil | ||
| } |