129 lines
3.5 KiB
Go
129 lines
3.5 KiB
Go
/*
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Copyright 2016 The Fission Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package mqtrigger
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strings"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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fv1 "github.com/fission/fission/pkg/apis/core/v1"
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"github.com/fission/fission/pkg/crd"
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"github.com/fission/fission/pkg/mqtrigger"
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"github.com/fission/fission/pkg/mqtrigger/messageQueue"
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"github.com/fission/fission/pkg/mqtrigger/messageQueue/azurequeuestorage"
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"github.com/fission/fission/pkg/mqtrigger/messageQueue/kafka"
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"github.com/fission/fission/pkg/mqtrigger/messageQueue/nats"
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)
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func Start(logger *zap.Logger, routerUrl string) error {
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fissionClient, _, _, err := crd.MakeFissionClient()
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if err != nil {
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return errors.Wrap(err, "failed to get fission or kubernetes client")
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}
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err = fissionClient.WaitForCRDs()
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if err != nil {
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return errors.Wrap(err, "error waiting for CRDs")
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}
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// Message queue type: nats is the only supported one for now
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mqType := os.Getenv("MESSAGE_QUEUE_TYPE")
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mqUrl := os.Getenv("MESSAGE_QUEUE_URL")
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secretsPath := strings.TrimSpace(os.Getenv("MESSAGE_QUEUE_SECRETS"))
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var secrets map[string][]byte
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if len(secretsPath) > 0 {
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// For authentication with message queue
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secrets, err = readSecrets(logger, secretsPath)
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if err != nil {
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return err
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}
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}
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mq, err := newMessageQueue(
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logger,
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routerUrl,
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messageQueue.Config{
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MQType: mqType,
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Url: mqUrl,
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Secrets: secrets,
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},
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)
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if err != nil {
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logger.Fatal("failed to connect to remote message queue server", zap.Error(err))
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}
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mqtrigger.MakeMessageQueueTriggerManager(logger, fissionClient, mq).Run()
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return nil
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}
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func newMessageQueue(logger *zap.Logger, routerURL string, mqCfg messageQueue.Config) (messageQueue messageQueue.MessageQueue, err error) {
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switch mqCfg.MQType {
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case fv1.MessageQueueTypeNats:
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messageQueue, err = nats.New(logger, routerURL, mqCfg)
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case fv1.MessageQueueTypeASQ:
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messageQueue, err = azurequeuestorage.New(logger, routerURL, mqCfg)
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case fv1.MessageQueueTypeKafka:
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messageQueue, err = kafka.New(logger, routerURL, mqCfg)
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default:
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err = errors.Errorf("no supported message queue type found for %q", mqCfg.MQType)
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}
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return messageQueue, err
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}
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func readSecrets(logger *zap.Logger, secretsPath string) (map[string][]byte, error) {
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// return if no secrets exist
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if _, err := os.Stat(secretsPath); os.IsNotExist(err) {
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return nil, err
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}
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secretFiles, err := ioutil.ReadDir(secretsPath)
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if err != nil {
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return nil, err
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}
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secrets := make(map[string][]byte)
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for _, secretFile := range secretFiles {
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fileName := secretFile.Name()
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// /etc/secrets contain some hidden directories (like .data)
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// ignore them
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if !secretFile.IsDir() && !strings.HasPrefix(fileName, ".") {
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logger.Info(fmt.Sprintf("Reading secret from %s", fileName))
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filePath := path.Join(secretsPath, fileName)
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secret, fileReadErr := ioutil.ReadFile(filePath)
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if fileReadErr != nil {
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return nil, fileReadErr
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}
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secrets[fileName] = secret
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}
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}
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return secrets, nil
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}
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