mirror of https://github.com/portainer/portainer
110 lines
4.3 KiB
Go
110 lines
4.3 KiB
Go
package kubernetes
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import (
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"errors"
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"fmt"
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"net/http"
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httperror "github.com/portainer/libhttp/error"
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"github.com/portainer/libhttp/request"
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"github.com/portainer/libhttp/response"
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portainer "github.com/portainer/portainer/api"
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bolterrors "github.com/portainer/portainer/api/bolt/errors"
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"github.com/portainer/portainer/api/http/security"
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kcli "github.com/portainer/portainer/api/kubernetes/cli"
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)
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// @id GetKubernetesConfig
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// @summary Generates kubeconfig file enabling client communication with k8s api server
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// @description Generates kubeconfig file enabling client communication with k8s api server
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// @description **Access policy**: authorized
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// @tags kubernetes
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// @security jwt
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// @accept json
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// @produce json
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// @param id path int true "Environment(Endpoint) identifier"
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// @success 200 "Success"
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// @failure 400 "Invalid request"
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// @failure 401 "Unauthorized"
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// @failure 403 "Permission denied"
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// @failure 404 "Environment(Endpoint) or ServiceAccount not found"
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// @failure 500 "Server error"
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// @router /kubernetes/{id}/config [get]
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func (handler *Handler) getKubernetesConfig(w http.ResponseWriter, r *http.Request) *httperror.HandlerError {
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endpointID, err := request.RetrieveNumericRouteVariableValue(r, "id")
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if err != nil {
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return &httperror.HandlerError{http.StatusBadRequest, "Invalid environment identifier route variable", err}
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}
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endpoint, err := handler.dataStore.Endpoint().Endpoint(portainer.EndpointID(endpointID))
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if err == bolterrors.ErrObjectNotFound {
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return &httperror.HandlerError{http.StatusNotFound, "Unable to find an environment with the specified identifier inside the database", err}
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} else if err != nil {
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return &httperror.HandlerError{http.StatusInternalServerError, "Unable to find an environment with the specified identifier inside the database", err}
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}
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tokenData, err := security.RetrieveTokenData(r)
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if err != nil {
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return &httperror.HandlerError{http.StatusForbidden, "Permission denied to access environment", err}
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}
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bearerToken, err := handler.JwtService.GenerateTokenForKubeconfig(tokenData)
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if err != nil {
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return &httperror.HandlerError{http.StatusInternalServerError, "Unable to generate JWT token", err}
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}
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cli, err := handler.kubernetesClientFactory.GetKubeClient(endpoint)
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if err != nil {
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return &httperror.HandlerError{http.StatusInternalServerError, "Unable to create Kubernetes client", err}
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}
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apiServerURL := getProxyUrl(r, endpointID)
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config, err := cli.GetKubeConfig(r.Context(), apiServerURL, bearerToken, tokenData)
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if err != nil {
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return &httperror.HandlerError{http.StatusNotFound, "Unable to generate Kubeconfig", err}
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}
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filenameBase := fmt.Sprintf("%s-%s", tokenData.Username, endpoint.Name)
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contentAcceptHeader := r.Header.Get("Accept")
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if contentAcceptHeader == "text/yaml" {
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yaml, err := kcli.GenerateYAML(config)
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if err != nil {
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return &httperror.HandlerError{http.StatusInternalServerError, "Failed to generate Kubeconfig", err}
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}
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w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; %s.yaml", filenameBase))
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return YAML(w, yaml)
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}
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w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; %s.json", filenameBase))
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return response.JSON(w, config)
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}
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// getProxyUrl generates portainer proxy url which acts as proxy to k8s api server
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func getProxyUrl(r *http.Request, endpointID int) string {
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return fmt.Sprintf("https://%s/api/endpoints/%d/kubernetes", r.Host, endpointID)
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}
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// YAML writes yaml response as string to writer. Returns a pointer to a HandlerError if encoding fails.
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// This could be moved to a more useful place; but that place is most likely not in this project.
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// It should actually go in https://github.com/portainer/libhttp - since that is from where we use response.JSON.
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// We use `data interface{}` as parameter - since im trying to keep it as close to (or the same as) response.JSON method signature:
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// https://github.com/portainer/libhttp/blob/d20481a3da823c619887c440a22fdf4fa8f318f2/response/response.go#L13
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func YAML(rw http.ResponseWriter, data interface{}) *httperror.HandlerError {
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rw.Header().Set("Content-Type", "text/yaml")
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strData, ok := data.(string)
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if !ok {
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return &httperror.HandlerError{
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StatusCode: http.StatusInternalServerError,
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Message: "Unable to write YAML response",
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Err: errors.New("failed to convert input to string"),
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}
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}
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fmt.Fprint(rw, strData)
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return nil
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}
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