conversions.go

/*
Copyright 2020 The Kubermatic Kubernetes Platform contributors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package provider

import (
	"fmt"
	"net/http"
	"strings"

	kubermaticv1 "github.com/kubermatic/kubermatic/api/pkg/crd/kubermatic/v1"
	"github.com/kubermatic/kubermatic/api/pkg/util/errors"
)

// Needed because the cloud providers are initialized once during startup and get all
// DCs.
// We need to change the cloud providers to by dynamically initialized when needed instead
// once we support datacenters as CRDs.
// TODO: Find a way to lift the current requirement of unique nodeDatacenter names. It is needed
// only because we put the nodeDatacenter name on the cluster but not the seed
func DatacenterFromSeedMap(userInfo *UserInfo, seedsGetter SeedsGetter, datacenterName string) (*kubermaticv1.Seed, *kubermaticv1.Datacenter, error) {
	seeds, err := seedsGetter()
	if err != nil {
		return nil, nil, errors.New(http.StatusInternalServerError, fmt.Sprintf("failed to list seeds: %v", err))
	}

	var foundDatacenters []kubermaticv1.Datacenter
	var foundSeeds []*kubermaticv1.Seed

iterateOverSeeds:
	for _, seed := range seeds {
		datacenter, exists := seed.Spec.Datacenters[datacenterName]
		if !exists {
			continue
		}

		requiredEmailDomain := datacenter.Spec.RequiredEmailDomain
		requiredEmailDomains := datacenter.Spec.RequiredEmailDomains

		if requiredEmailDomain == "" && len(requiredEmailDomains) == 0 {
			// find datacenter for "all" without RequiredEmailDomain(s) field
			foundSeeds = append(foundSeeds, seed)
			foundDatacenters = append(foundDatacenters, datacenter)
			continue iterateOverSeeds
		} else {
			// find datacenter for specific email domain
			split := strings.Split(userInfo.Email, "@")
			if len(split) != 2 {
				return nil, nil, fmt.Errorf("invalid email address")
			}
			userDomain := split[1]

			if requiredEmailDomain != "" && strings.EqualFold(userDomain, requiredEmailDomain) {
				foundSeeds = append(foundSeeds, seed)
				foundDatacenters = append(foundDatacenters, datacenter)
				continue iterateOverSeeds
			}

			for _, whitelistedDomain := range requiredEmailDomains {
				if whitelistedDomain != "" && strings.EqualFold(userDomain, whitelistedDomain) {
					foundSeeds = append(foundSeeds, seed)
					foundDatacenters = append(foundDatacenters, datacenter)
					continue iterateOverSeeds
				}
			}
		}
	}

	if len(foundDatacenters) == 0 {
		return nil, nil, errors.New(http.StatusNotFound, fmt.Sprintf("datacenter %q not found", datacenterName))
	}
	if n := len(foundDatacenters); n > 1 {
		return nil, nil, fmt.Errorf("expected to find exactly one datacenter with name %q, got %d", datacenterName, n)
	}

	return foundSeeds[0], &foundDatacenters[0], nil
}