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clickhouse.go
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clickhouse.go
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// Copyright 2022 Antrea Authors
//
// 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 exporter
import (
"fmt"
"os"
"path"
"reflect"
"time"
ipfixentities "github.com/vmware/go-ipfix/pkg/entities"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
"antrea.io/antrea/pkg/flowaggregator/clickhouseclient"
"antrea.io/antrea/pkg/flowaggregator/options"
)
type ClickHouseExporter struct {
chConfig *clickhouseclient.ClickHouseConfig
chExportProcess *clickhouseclient.ClickHouseExportProcess
}
const (
CACertFile = "ca.crt"
CertDir = "/etc/flow-aggregator/certs"
DefaultInterval = 1 * time.Second
Timeout = 1 * time.Minute
)
func buildClickHouseConfig(opt *options.Options) clickhouseclient.ClickHouseConfig {
return clickhouseclient.ClickHouseConfig{
Username: os.Getenv("CH_USERNAME"),
Password: os.Getenv("CH_PASSWORD"),
Database: opt.Config.ClickHouse.Database,
DatabaseURL: opt.Config.ClickHouse.DatabaseURL,
Debug: opt.Config.ClickHouse.Debug,
Compress: opt.Config.ClickHouse.Compress,
CommitInterval: opt.ClickHouseCommitInterval,
CACert: opt.Config.ClickHouse.TLS.CACert,
InsecureSkipVerify: opt.Config.ClickHouse.TLS.InsecureSkipVerify,
}
}
func NewClickHouseExporter(k8sClient kubernetes.Interface, opt *options.Options) (*ClickHouseExporter, error) {
chConfig := buildClickHouseConfig(opt)
klog.InfoS("ClickHouse configuration", "database", chConfig.Database, "databaseURL", chConfig.DatabaseURL, "debug", chConfig.Debug,
"compress", *chConfig.Compress, "commitInterval", chConfig.CommitInterval, "insecureSkipVerify", chConfig.InsecureSkipVerify, "caCert", chConfig.CACert)
var errMessage error
if chConfig.CACert {
err := wait.Poll(DefaultInterval, Timeout, func() (bool, error) {
caCertPath := path.Join(CertDir, CACertFile)
certificate, err := os.ReadFile(caCertPath)
if err != nil {
errMessage = err
return false, nil
}
chConfig.Certificate = certificate
return true, nil
})
if err != nil {
return nil, fmt.Errorf("error when reading custom CA certificate: %v", errMessage)
}
}
clusterUUID, err := getClusterUUID(k8sClient)
if err != nil {
return nil, err
}
chExportProcess, err := clickhouseclient.NewClickHouseClient(chConfig, clusterUUID.String())
if err != nil {
return nil, err
}
return &ClickHouseExporter{
chConfig: &chConfig,
chExportProcess: chExportProcess,
}, nil
}
func (e *ClickHouseExporter) AddRecord(record ipfixentities.Record, isRecordIPv6 bool) error {
e.chExportProcess.CacheRecord(record)
return nil
}
func (e *ClickHouseExporter) Start() {
e.chExportProcess.Start()
}
func (e *ClickHouseExporter) Stop() {
e.chExportProcess.Stop()
}
func (e *ClickHouseExporter) UpdateOptions(opt *options.Options) {
chConfig := buildClickHouseConfig(opt)
connect, err := clickhouseclient.PrepareClickHouseConnection(chConfig)
if err != nil {
klog.ErrorS(err, "Error when checking new connection")
return
}
if reflect.DeepEqual(chConfig, e.chExportProcess.GetClickHouseConfig()) {
return
}
klog.InfoS("Updating ClickHouse")
if chConfig.CommitInterval != e.chExportProcess.GetCommitInterval() {
e.chExportProcess.SetCommitInterval(chConfig.CommitInterval)
}
// When a new commitInterval was updated through
// e.chExportProcess.SetCommitInterval, the following
// e.chExportProcess.UpdateCH will not be called.
if !reflect.DeepEqual(chConfig, e.chExportProcess.GetClickHouseConfig()) {
e.chExportProcess.UpdateCH(chConfig, connect)
}
klog.InfoS("New ClickHouse configuration", "database", chConfig.Database, "databaseURL", chConfig.DatabaseURL, "debug", chConfig.Debug, "compress", *chConfig.Compress, "commitInterval", chConfig.CommitInterval)
}