mirror of
https://github.com/gravitl/netmaker.git
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102 lines
3.3 KiB
Go
102 lines
3.3 KiB
Go
package mq
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import (
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"context"
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"time"
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mqtt "github.com/eclipse/paho.mqtt.golang"
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"github.com/gravitl/netmaker/logger"
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"github.com/gravitl/netmaker/netclient/ncutils"
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"github.com/gravitl/netmaker/servercfg"
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)
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// KEEPALIVE_TIMEOUT - time in seconds for timeout
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const KEEPALIVE_TIMEOUT = 60 //timeout in seconds
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// MQ_DISCONNECT - disconnects MQ
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const MQ_DISCONNECT = 250
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// MQ_TIMEOUT - timeout for MQ
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const MQ_TIMEOUT = 30
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var peer_force_send = 0
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var mqclient mqtt.Client
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func setMqOptions(user, password string, opts *mqtt.ClientOptions) {
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broker, _ := servercfg.GetMessageQueueEndpoint()
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opts.AddBroker(broker)
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id := ncutils.MakeRandomString(23)
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opts.ClientID = id
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opts.SetUsername(user)
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opts.SetPassword(password)
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opts.SetAutoReconnect(true)
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opts.SetConnectRetry(true)
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opts.SetConnectRetryInterval(time.Second << 2)
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opts.SetKeepAlive(time.Minute)
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opts.SetWriteTimeout(time.Minute)
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}
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// SetupMQTT creates a connection to broker and return client
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func SetupMQTT() {
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opts := mqtt.NewClientOptions()
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setMqOptions(servercfg.GetMqUserName(), servercfg.GetMqPassword(), opts)
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opts.SetOnConnectHandler(func(client mqtt.Client) {
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if token := client.Subscribe("ping/#", 2, mqtt.MessageHandler(Ping)); token.WaitTimeout(MQ_TIMEOUT*time.Second) && token.Error() != nil {
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client.Disconnect(240)
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logger.Log(0, "ping subscription failed")
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}
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if token := client.Subscribe("update/#", 0, mqtt.MessageHandler(UpdateNode)); token.WaitTimeout(MQ_TIMEOUT*time.Second) && token.Error() != nil {
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client.Disconnect(240)
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logger.Log(0, "node update subscription failed")
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}
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if token := client.Subscribe("host/serverupdate/#", 0, mqtt.MessageHandler(UpdateHost)); token.WaitTimeout(MQ_TIMEOUT*time.Second) && token.Error() != nil {
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client.Disconnect(240)
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logger.Log(0, "host update subscription failed")
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}
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if token := client.Subscribe("signal/#", 0, mqtt.MessageHandler(ClientPeerUpdate)); token.WaitTimeout(MQ_TIMEOUT*time.Second) && token.Error() != nil {
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client.Disconnect(240)
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logger.Log(0, "node client subscription failed")
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}
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if token := client.Subscribe("metrics/#", 0, mqtt.MessageHandler(UpdateMetrics)); token.WaitTimeout(MQ_TIMEOUT*time.Second) && token.Error() != nil {
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client.Disconnect(240)
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logger.Log(0, "node metrics subscription failed")
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}
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opts.SetOrderMatters(true)
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opts.SetResumeSubs(true)
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})
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mqclient = mqtt.NewClient(opts)
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tperiod := time.Now().Add(10 * time.Second)
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for {
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if token := mqclient.Connect(); !token.WaitTimeout(MQ_TIMEOUT*time.Second) || token.Error() != nil {
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logger.Log(2, "unable to connect to broker, retrying ...")
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if time.Now().After(tperiod) {
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if token.Error() == nil {
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logger.FatalLog("could not connect to broker, token timeout, exiting ...")
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} else {
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logger.FatalLog("could not connect to broker, exiting ...", token.Error().Error())
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}
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}
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} else {
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break
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}
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time.Sleep(2 * time.Second)
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}
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}
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// Keepalive -- periodically pings all nodes to let them know server is still alive and doing well
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func Keepalive(ctx context.Context) {
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for {
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select {
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case <-ctx.Done():
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return
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case <-time.After(time.Second * KEEPALIVE_TIMEOUT):
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sendPeers()
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}
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}
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}
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// IsConnected - function for determining if the mqclient is connected or not
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func IsConnected() bool {
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return mqclient != nil && mqclient.IsConnected()
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}
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