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main.go
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main.go
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/*
Copyright © 2021 Markus Mahlberg <markus@mahlberg.io>
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 main
import (
"context"
"fmt"
"os"
"os/signal"
"syscall"
"github.com/alecthomas/kong"
"github.com/hashicorp/go-hclog"
"github.com/velero-sentinel/sentinel/notification"
"github.com/velero-sentinel/sentinel/pipeline"
"github.com/vmware-tanzu/velero/pkg/client"
"k8s.io/apimachinery/pkg/watch"
"github.com/velero-sentinel/sentinel/server"
"gopkg.in/yaml.v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
veleroNamespace = "velero"
)
type debug bool
func (d debug) BeforeApply() error {
appLogger.SetLevel(hclog.Debug)
return nil
}
type cfgPath string
func (p cfgPath) AfterApply() error {
if p == "" {
return nil
}
f, err := os.Open(string(p))
if err != nil {
return err
}
defer f.Close()
return yaml.NewDecoder(f).Decode(¬ifiers)
}
var (
appLogger hclog.Logger = hclog.New(&hclog.LoggerOptions{Name: "sentinel", Color: hclog.ForceColor})
notifiers notification.NotifierConfig
config struct {
Namespace string `kong:"required,short='n',default='velero'"`
Debug debug `kong:"help='Enable debug logging',group='Logging'"`
Bind string `kong:"required,default=':8080',group='Network',help='address to bind to'"`
NotifierConfig cfgPath `kong:"type:'existingfile'"`
}
)
func main() {
ctx := kong.Parse(&config, kong.Bind(appLogger))
ctx.Printf("Starting up...\n")
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
p, err := pipeline.New(¬ifiers, appLogger.Named("notification"))
ctx.FatalIfErrorf(err)
ctx.Printf("Configured pipeline\n")
watcher, _ := setupClient()
evts := watcher.ResultChan()
s := server.New(p.Run(), appLogger.Named("server"))
s.Run(evts)
ctx.Printf("Started server")
sig := <-sigs
appLogger.Info("Received signal", "signal", sig.String())
watcher.Stop()
appLogger.Info("Saying goodbye!")
}
func setupClient() (watch.Interface, error) {
cfg, err := client.LoadConfig()
factory := client.NewFactory("sentinel", cfg)
myclient, err := factory.Client()
if err != nil {
return nil, fmt.Errorf("setting up client: %s", err)
}
return myclient.VeleroV1().Backups(veleroNamespace).Watch(context.Background(), metav1.ListOptions{})
}