This commit adds support for defining arbitrary peers that should have access to the VPN. In k8s, this is accomplished using the new Peer CRD.
134 lines
3.8 KiB
Go
134 lines
3.8 KiB
Go
// Copyright 2019 the Kilo authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"net"
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"os"
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"strings"
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"github.com/spf13/cobra"
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apiextensions "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/clientcmd"
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"github.com/squat/kilo/pkg/k8s"
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kiloclient "github.com/squat/kilo/pkg/k8s/clientset/versioned"
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"github.com/squat/kilo/pkg/mesh"
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"github.com/squat/kilo/pkg/version"
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)
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const (
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logLevelAll = "all"
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logLevelDebug = "debug"
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logLevelInfo = "info"
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logLevelWarn = "warn"
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logLevelError = "error"
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logLevelNone = "none"
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)
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var (
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availableBackends = strings.Join([]string{
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k8s.Backend,
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}, ", ")
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availableGranularities = strings.Join([]string{
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string(mesh.DataCenterGranularity),
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string(mesh.NodeGranularity),
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}, ", ")
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availableLogLevels = strings.Join([]string{
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logLevelAll,
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logLevelDebug,
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logLevelInfo,
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logLevelWarn,
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logLevelError,
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logLevelNone,
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}, ", ")
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opts struct {
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backend mesh.Backend
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granularity mesh.Granularity
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subnet *net.IPNet
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}
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backend string
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granularity string
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kubeconfig string
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subnet string
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)
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func runRoot(_ *cobra.Command, _ []string) error {
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_, s, err := net.ParseCIDR(subnet)
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if err != nil {
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return fmt.Errorf("failed to parse %q as CIDR: %v", subnet, err)
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}
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opts.subnet = s
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opts.granularity = mesh.Granularity(granularity)
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switch opts.granularity {
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case mesh.DataCenterGranularity:
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case mesh.NodeGranularity:
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default:
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return fmt.Errorf("mesh granularity %v unknown; posible values are: %s", granularity, availableGranularities)
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}
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switch backend {
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case k8s.Backend:
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config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
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if err != nil {
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return fmt.Errorf("failed to create Kubernetes config: %v", err)
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}
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c := kubernetes.NewForConfigOrDie(config)
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kc := kiloclient.NewForConfigOrDie(config)
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ec := apiextensions.NewForConfigOrDie(config)
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opts.backend = k8s.New(c, kc, ec)
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default:
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return fmt.Errorf("backend %v unknown; posible values are: %s", backend, availableBackends)
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}
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if err := opts.backend.Nodes().Init(make(chan struct{})); err != nil {
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return fmt.Errorf("failed to initialize node backend: %v", err)
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}
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if err := opts.backend.Peers().Init(make(chan struct{})); err != nil {
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return fmt.Errorf("failed to initialize peer backend: %v", err)
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}
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return nil
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}
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func main() {
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cmd := &cobra.Command{
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Use: "kgctl",
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Short: "Manage a Kilo network",
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Long: "",
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PersistentPreRunE: runRoot,
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Version: version.Version,
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}
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cmd.PersistentFlags().StringVar(&backend, "backend", k8s.Backend, fmt.Sprintf("The backend for the mesh. Possible values: %s", availableBackends))
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cmd.PersistentFlags().StringVar(&granularity, "mesh-granularity", string(mesh.DataCenterGranularity), fmt.Sprintf("The granularity of the network mesh to create. Possible values: %s", availableGranularities))
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cmd.PersistentFlags().StringVar(&kubeconfig, "kubeconfig", "", "Path to kubeconfig.")
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cmd.PersistentFlags().StringVar(&subnet, "subnet", "10.4.0.0/16", "CIDR from which to allocate addressees to WireGuard interfaces.")
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for _, subCmd := range []*cobra.Command{
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graph(),
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showConf(),
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} {
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cmd.AddCommand(subCmd)
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}
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if err := cmd.Execute(); err != nil {
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fmt.Fprintf(os.Stderr, "%v\n", err)
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os.Exit(1)
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}
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}
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