mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
3d01ca1309
This gives nicer errors from Kubernetes components during startup, and reduces LOC a bit by using the upstream responsewriters module instead of writing the headers and body by hand. Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
package server
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import (
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"net/http"
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"github.com/gorilla/mux"
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"github.com/k3s-io/k3s/pkg/daemons/config"
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"github.com/k3s-io/k3s/pkg/generated/clientset/versioned/scheme"
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"github.com/sirupsen/logrus"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
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"k8s.io/apiserver/pkg/endpoints/request"
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)
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func hasRole(mustRoles []string, roles []string) bool {
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for _, check := range roles {
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for _, role := range mustRoles {
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if role == check {
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return true
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}
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}
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}
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return false
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}
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func doAuth(roles []string, serverConfig *config.Control, next http.Handler, rw http.ResponseWriter, req *http.Request) {
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switch {
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case serverConfig == nil:
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logrus.Errorf("Authenticate not initialized: serverConfig is nil")
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unauthorized(rw, req)
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return
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case serverConfig.Runtime.Authenticator == nil:
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logrus.Errorf("Authenticate not initialized: serverConfig.Runtime.Authenticator is nil")
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unauthorized(rw, req)
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return
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}
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resp, ok, err := serverConfig.Runtime.Authenticator.AuthenticateRequest(req)
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if err != nil {
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logrus.Errorf("Failed to authenticate request from %s: %v", req.RemoteAddr, err)
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unauthorized(rw, req)
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return
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}
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if !ok || !hasRole(roles, resp.User.GetGroups()) {
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forbidden(rw, req)
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return
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}
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ctx := request.WithUser(req.Context(), resp.User)
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req = req.WithContext(ctx)
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next.ServeHTTP(rw, req)
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}
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func authMiddleware(serverConfig *config.Control, roles ...string) mux.MiddlewareFunc {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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doAuth(roles, serverConfig, next, rw, req)
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})
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}
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}
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func unauthorized(resp http.ResponseWriter, req *http.Request) {
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responsewriters.ErrorNegotiated(
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&apierrors.StatusError{ErrStatus: metav1.Status{
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Status: metav1.StatusFailure,
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Code: http.StatusUnauthorized,
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Reason: metav1.StatusReasonUnauthorized,
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Message: "not authorized",
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}},
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scheme.Codecs.WithoutConversion(), schema.GroupVersion{}, resp, req,
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)
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}
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func forbidden(resp http.ResponseWriter, req *http.Request) {
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responsewriters.ErrorNegotiated(
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&apierrors.StatusError{ErrStatus: metav1.Status{
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Status: metav1.StatusFailure,
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Code: http.StatusForbidden,
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Reason: metav1.StatusReasonForbidden,
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Message: "forbidden",
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}},
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scheme.Codecs.WithoutConversion(), schema.GroupVersion{}, resp, req,
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)
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}
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