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refactored and cleaned up code, added peer update from clients

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This commit is contained in:
0xdcarns 2022-02-16 15:40:51 -05:00
parent 3fb34fa70e
commit 867e253c3b
5 changed files with 347 additions and 348 deletions
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105
mq/handlers.go Normal file
View file

@ -0,0 +1,105 @@
package mq
import (
"encoding/json"
mqtt "github.com/eclipse/paho.mqtt.golang"
"github.com/gravitl/netmaker/database"
"github.com/gravitl/netmaker/logger"
"github.com/gravitl/netmaker/logic"
"github.com/gravitl/netmaker/models"
)
// DefaultHandler default message queue handler - only called when GetDebug == true
func DefaultHandler(client mqtt.Client, msg mqtt.Message) {
logger.Log(0, "MQTT Message: Topic: ", string(msg.Topic()), " Message: ", string(msg.Payload()))
}
// Ping message Handler -- handles ping topic from client nodes
func Ping(client mqtt.Client, msg mqtt.Message) {
logger.Log(0, "Ping Handler: ", msg.Topic())
go func() {
id, err := getID(msg.Topic())
if err != nil {
logger.Log(0, "error getting node.ID sent on ping topic ")
return
}
node, err := logic.GetNodeByID(id)
if err != nil {
logger.Log(0, "mq-ping error getting node: ", err.Error())
record, err := database.FetchRecord(database.NODES_TABLE_NAME, id)
if err != nil {
logger.Log(0, "error reading database ", err.Error())
return
}
logger.Log(0, "record from database")
logger.Log(0, record)
return
}
_, decryptErr := decryptMsg(&node, msg.Payload())
if decryptErr != nil {
logger.Log(0, "error decrypting when updating node ", node.ID, decryptErr.Error())
return
}
node.SetLastCheckIn()
if err := logic.UpdateNode(&node, &node); err != nil {
logger.Log(0, "error updating node", node.Name, node.ID, " on checkin", err.Error())
return
}
logger.Log(3, "ping processed for node", node.ID)
// --TODO --set client version once feature is implemented.
//node.SetClientVersion(msg.Payload())
}()
}
// UpdateNode message Handler -- handles updates from client nodes
func UpdateNode(client mqtt.Client, msg mqtt.Message) {
go func() {
id, err := getID(msg.Topic())
if err != nil {
logger.Log(1, "error getting node.ID sent on ", msg.Topic(), err.Error())
return
}
currentNode, err := logic.GetNodeByID(id)
if err != nil {
logger.Log(1, "error getting node ", id, err.Error())
return
}
decrypted, decryptErr := decryptMsg(&currentNode, msg.Payload())
if decryptErr != nil {
logger.Log(1, "failed to decrypt message for node ", id, decryptErr.Error())
return
}
var newNode models.Node
if err := json.Unmarshal(decrypted, &newNode); err != nil {
logger.Log(1, "error unmarshaling payload ", err.Error())
return
}
if err := logic.UpdateNode(&currentNode, &newNode); err != nil {
logger.Log(1, "error saving node", err.Error())
return
}
logger.Log(1, "updated node", id, newNode.Name)
}()
}
// ClientPeerUpdate message handler -- handles updating peers after signal from client nodes
func ClientPeerUpdate(client mqtt.Client, msg mqtt.Message) {
go func() {
id, err := getID(msg.Topic())
if err != nil {
logger.Log(1, "error getting node.ID sent on ", msg.Topic(), err.Error())
return
}
currentNode, err := logic.GetNodeByID(id)
if err != nil {
logger.Log(1, "error getting node ", id, err.Error())
return
}
if err := PublishPeerUpdate(&currentNode); err != nil {
logger.Log(1, "error publishing peer update ", err.Error())
return
}
logger.Log(1, "sent peer updates after signal received from", id, currentNode.Name)
}()
}

227
mq/mq.go
View file

@ -2,18 +2,11 @@ package mq
import (
"context"
"encoding/json"
"errors"
"fmt"
"log"
"strings"
"time"
mqtt "github.com/eclipse/paho.mqtt.golang"
"github.com/gravitl/netmaker/database"
"github.com/gravitl/netmaker/logger"
"github.com/gravitl/netmaker/logic"
"github.com/gravitl/netmaker/models"
"github.com/gravitl/netmaker/netclient/ncutils"
"github.com/gravitl/netmaker/servercfg"
)
@ -25,171 +18,6 @@ const MQ_DISCONNECT = 250
var peer_force_send = 0
// DefaultHandler default message queue handler - only called when GetDebug == true
func DefaultHandler(client mqtt.Client, msg mqtt.Message) {
logger.Log(0, "MQTT Message: Topic: ", string(msg.Topic()), " Message: ", string(msg.Payload()))
}
// Ping message Handler -- handles ping topic from client nodes
func Ping(client mqtt.Client, msg mqtt.Message) {
logger.Log(0, "Ping Handler: ", msg.Topic())
go func() {
id, err := GetID(msg.Topic())
if err != nil {
logger.Log(0, "error getting node.ID sent on ping topic ")
return
}
node, err := logic.GetNodeByID(id)
if err != nil {
logger.Log(0, "mq-ping error getting node: ", err.Error())
record, err := database.FetchRecord(database.NODES_TABLE_NAME, id)
if err != nil {
logger.Log(0, "error reading database ", err.Error())
return
}
logger.Log(0, "record from database")
logger.Log(0, record)
return
}
_, decryptErr := decryptMsg(&node, msg.Payload())
if decryptErr != nil {
logger.Log(0, "error decrypting when updating node ", node.ID, decryptErr.Error())
return
}
node.SetLastCheckIn()
if err := logic.UpdateNode(&node, &node); err != nil {
logger.Log(0, "error updating node", node.Name, node.ID, " on checkin", err.Error())
return
}
logger.Log(3, "ping processed for node", node.ID)
// --TODO --set client version once feature is implemented.
//node.SetClientVersion(msg.Payload())
}()
}
// UpdateNode message Handler -- handles updates from client nodes
func UpdateNode(client mqtt.Client, msg mqtt.Message) {
go func() {
id, err := GetID(msg.Topic())
if err != nil {
logger.Log(1, "error getting node.ID sent on ", msg.Topic(), err.Error())
return
}
currentNode, err := logic.GetNodeByID(id)
if err != nil {
logger.Log(1, "error getting node ", id, err.Error())
return
}
decrypted, decryptErr := decryptMsg(&currentNode, msg.Payload())
if decryptErr != nil {
logger.Log(1, "failed to decrypt message for node ", id, decryptErr.Error())
return
}
var newNode models.Node
if err := json.Unmarshal(decrypted, &newNode); err != nil {
logger.Log(1, "error unmarshaling payload ", err.Error())
return
}
if err := logic.UpdateNode(&currentNode, &newNode); err != nil {
logger.Log(1, "error saving node", err.Error())
return
}
if err := PublishPeerUpdate(&newNode); err != nil {
logger.Log(1, "error publishing peer update ", err.Error())
return
}
logger.Log(1, "Updated node", id, newNode.Name)
}()
}
// PublishPeerUpdate --- deterines and publishes a peer update to all the peers of a node
func PublishPeerUpdate(newNode *models.Node) error {
if !servercfg.IsMessageQueueBackend() {
return nil
}
networkNodes, err := logic.GetNetworkNodes(newNode.Network)
if err != nil {
logger.Log(1, "err getting Network Nodes", err.Error())
return err
}
for _, node := range networkNodes {
if node.IsServer == "yes" || node.ID == newNode.ID {
continue
}
peerUpdate, err := logic.GetPeerUpdate(&node)
if err != nil {
logger.Log(1, "error getting peer update for node", node.ID, err.Error())
continue
}
data, err := json.Marshal(&peerUpdate)
if err != nil {
logger.Log(2, "error marshaling peer update for node", node.ID, err.Error())
continue
}
if err = publish(&node, fmt.Sprintf("peers/%s/%s", node.Network, node.ID), data); err != nil {
logger.Log(1, "failed to publish peer update for node", node.ID)
} else {
logger.Log(1, "sent peer update for node", node.Name, "on network:", node.Network)
}
}
return nil
}
// PublishPeerUpdate --- deterines and publishes a peer update to all the peers of a node
func PublishExtPeerUpdate(node *models.Node) error {
var err error
if logic.IsLocalServer(node) {
if err = logic.ServerUpdate(node, false); err != nil {
logger.Log(1, "server node:", node.ID, "failed to update peers with ext clients")
return err
} else {
return nil
}
}
if !servercfg.IsMessageQueueBackend() {
return nil
}
peerUpdate, err := logic.GetPeerUpdate(node)
if err != nil {
return err
}
data, err := json.Marshal(&peerUpdate)
if err != nil {
return err
}
return publish(node, fmt.Sprintf("peers/%s/%s", node.Network, node.ID), data)
}
// GetID -- decodes a message queue topic and returns the embedded node.ID
func GetID(topic string) (string, error) {
parts := strings.Split(topic, "/")
count := len(parts)
if count == 1 {
return "", errors.New("invalid topic")
}
//the last part of the topic will be the node.ID
return parts[count-1], nil
}
// NodeUpdate -- publishes a node update
func NodeUpdate(node *models.Node) error {
if !servercfg.IsMessageQueueBackend() {
return nil
}
logger.Log(3, "publishing node update to "+node.Name)
data, err := json.Marshal(node)
if err != nil {
logger.Log(2, "error marshalling node update ", err.Error())
return err
}
if err = publish(node, fmt.Sprintf("update/%s/%s", node.Network, node.ID), data); err != nil {
logger.Log(2, "error publishing node update to peer ", node.ID, err.Error())
return err
}
return nil
}
// SetupMQTT creates a connection to broker and return client
func SetupMQTT(publish bool) mqtt.Client {
opts := mqtt.NewClientOptions()
@ -217,6 +45,10 @@ func SetupMQTT(publish bool) mqtt.Client {
client.Disconnect(240)
logger.Log(0, "node update subscription failed")
}
if token := client.Subscribe("clients/#", 0, mqtt.MessageHandler(ClientPeerUpdate)); token.Wait() && token.Error() != nil {
client.Disconnect(240)
logger.Log(0, "node client subscription failed")
}
opts.SetOrderMatters(true)
opts.SetResumeSubs(true)
@ -249,54 +81,3 @@ func Keepalive(ctx context.Context) {
}
}
}
// sendPeers - retrieve networks, send peer ports to all peers
func sendPeers() {
var force bool
peer_force_send++
if peer_force_send == 5 {
force = true
peer_force_send = 0
}
networks, err := logic.GetNetworks()
if err != nil {
logger.Log(1, "error retrieving networks for keepalive", err.Error())
}
for _, network := range networks {
serverNode, errN := logic.GetNetworkServerLeader(network.NetID)
if errN == nil {
serverNode.SetLastCheckIn()
logic.UpdateNode(&serverNode, &serverNode)
if network.DefaultUDPHolePunch == "yes" {
if logic.ShouldPublishPeerPorts(&serverNode) || force {
if force {
logger.Log(2, "sending scheduled peer update (5 min)")
}
err = PublishPeerUpdate(&serverNode)
if err != nil {
logger.Log(1, "error publishing udp port updates for network", network.NetID)
logger.Log(1, errN.Error())
}
}
}
} else {
logger.Log(1, "unable to retrieve leader for network ", network.NetID)
logger.Log(1, errN.Error())
continue
}
}
}
// func publishServerKeepalive(client mqtt.Client, network *models.Network) {
// nodes, err := logic.GetNetworkNodes(network.NetID)
// if err != nil {
// return
// }
// for _, node := range nodes {
// if token := client.Publish(fmt.Sprintf("serverkeepalive/%s/%s", network.NetID, node.ID), 0, false, servercfg.GetVersion()); token.Wait() && token.Error() != nil {
// logger.Log(1, "error publishing server keepalive for network", network.NetID, token.Error().Error())
// } else {
// logger.Log(2, "keepalive sent for network/node", network.NetID, node.ID)
// }
// }
// }

125
mq/publishers.go Normal file
View file

@ -0,0 +1,125 @@
package mq
import (
"encoding/json"
"fmt"
"github.com/gravitl/netmaker/logger"
"github.com/gravitl/netmaker/logic"
"github.com/gravitl/netmaker/models"
"github.com/gravitl/netmaker/servercfg"
)
// PublishPeerUpdate --- deterines and publishes a peer update to all the peers of a node
func PublishPeerUpdate(newNode *models.Node) error {
if !servercfg.IsMessageQueueBackend() {
return nil
}
networkNodes, err := logic.GetNetworkNodes(newNode.Network)
if err != nil {
logger.Log(1, "err getting Network Nodes", err.Error())
return err
}
for _, node := range networkNodes {
if node.IsServer == "yes" || node.ID == newNode.ID {
continue
}
peerUpdate, err := logic.GetPeerUpdate(&node)
if err != nil {
logger.Log(1, "error getting peer update for node", node.ID, err.Error())
continue
}
data, err := json.Marshal(&peerUpdate)
if err != nil {
logger.Log(2, "error marshaling peer update for node", node.ID, err.Error())
continue
}
if err = publish(&node, fmt.Sprintf("peers/%s/%s", node.Network, node.ID), data); err != nil {
logger.Log(1, "failed to publish peer update for node", node.ID)
} else {
logger.Log(1, "sent peer update for node", node.Name, "on network:", node.Network)
}
}
return nil
}
// PublishPeerUpdate --- publishes a peer update to all the peers of a node
func PublishExtPeerUpdate(node *models.Node) error {
var err error
if logic.IsLocalServer(node) {
if err = logic.ServerUpdate(node, false); err != nil {
logger.Log(1, "server node:", node.ID, "failed to update peers with ext clients")
return err
} else {
return nil
}
}
if !servercfg.IsMessageQueueBackend() {
return nil
}
peerUpdate, err := logic.GetPeerUpdate(node)
if err != nil {
return err
}
data, err := json.Marshal(&peerUpdate)
if err != nil {
return err
}
return publish(node, fmt.Sprintf("peers/%s/%s", node.Network, node.ID), data)
}
// NodeUpdate -- publishes a node update
func NodeUpdate(node *models.Node) error {
if !servercfg.IsMessageQueueBackend() {
return nil
}
logger.Log(3, "publishing node update to "+node.Name)
data, err := json.Marshal(node)
if err != nil {
logger.Log(2, "error marshalling node update ", err.Error())
return err
}
if err = publish(node, fmt.Sprintf("update/%s/%s", node.Network, node.ID), data); err != nil {
logger.Log(2, "error publishing node update to peer ", node.ID, err.Error())
return err
}
return nil
}
// sendPeers - retrieve networks, send peer ports to all peers
func sendPeers() {
var force bool
peer_force_send++
if peer_force_send == 5 {
force = true
peer_force_send = 0
}
networks, err := logic.GetNetworks()
if err != nil {
logger.Log(1, "error retrieving networks for keepalive", err.Error())
}
for _, network := range networks {
serverNode, errN := logic.GetNetworkServerLeader(network.NetID)
if errN == nil {
serverNode.SetLastCheckIn()
logic.UpdateNode(&serverNode, &serverNode)
if network.DefaultUDPHolePunch == "yes" {
if logic.ShouldPublishPeerPorts(&serverNode) || force {
if force {
logger.Log(2, "sending scheduled peer update (5 min)")
}
err = PublishPeerUpdate(&serverNode)
if err != nil {
logger.Log(1, "error publishing udp port updates for network", network.NetID)
logger.Log(1, errN.Error())
}
}
}
} else {
logger.Log(1, "unable to retrieve leader for network ", network.NetID)
logger.Log(1, errN.Error())
continue
}
}
}

11
mq/util.go
View file

@ -70,3 +70,14 @@ func publish(node *models.Node, dest string, msg []byte) error {
}
return nil
}
// decodes a message queue topic and returns the embedded node.ID
func getID(topic string) (string, error) {
parts := strings.Split(topic, "/")
count := len(parts)
if count == 1 {
return "", fmt.Errorf("invalid topic")
}
//the last part of the topic will be the node.ID
return parts[count-1], nil
}

227
netclient/functions/daemon.go
View file

@ -88,94 +88,6 @@ func Daemon() error {
}
// SetupMQTT creates a connection to broker and return client
func SetupMQTT(cfg *config.ClientConfig, publish bool) mqtt.Client {
opts := mqtt.NewClientOptions()
server := getServerAddress(cfg)
opts.AddBroker(server + ":1883")
id := ncutils.MakeRandomString(23)
opts.ClientID = id
opts.SetDefaultPublishHandler(All)
opts.SetAutoReconnect(true)
opts.SetConnectRetry(true)
opts.SetConnectRetryInterval(time.Second << 2)
opts.SetKeepAlive(time.Minute >> 1)
opts.SetWriteTimeout(time.Minute)
opts.SetOnConnectHandler(func(client mqtt.Client) {
if !publish {
if cfg.DebugOn {
if token := client.Subscribe("#", 0, nil); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
ncutils.Log("subscribed to all topics for debugging purposes")
}
if token := client.Subscribe(fmt.Sprintf("update/%s/%s", cfg.Node.Network, cfg.Node.ID), 0, mqtt.MessageHandler(NodeUpdate)); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
if cfg.DebugOn {
ncutils.Log(fmt.Sprintf("subscribed to node updates for node %s update/%s/%s", cfg.Node.Name, cfg.Node.Network, cfg.Node.ID))
}
if token := client.Subscribe(fmt.Sprintf("peers/%s/%s", cfg.Node.Network, cfg.Node.ID), 0, mqtt.MessageHandler(UpdatePeers)); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
if cfg.DebugOn {
ncutils.Log(fmt.Sprintf("subscribed to peer updates for node %s peers/%s/%s", cfg.Node.Name, cfg.Node.Network, cfg.Node.ID))
}
opts.SetOrderMatters(true)
opts.SetResumeSubs(true)
}
})
opts.SetConnectionLostHandler(func(c mqtt.Client, e error) {
ncutils.Log("detected broker connection lost, running pull for " + cfg.Node.Network)
_, err := Pull(cfg.Node.Network, true)
if err != nil {
ncutils.Log("could not run pull, server unreachable: " + err.Error())
ncutils.Log("waiting to retry...")
/*
//Consider putting in logic to restart - daemon may take long time to refresh
time.Sleep(time.Minute * 5)
ncutils.Log("restarting netclient")
daemon.Restart()
*/
}
ncutils.Log("connection re-established with mqtt server")
})
client := mqtt.NewClient(opts)
tperiod := time.Now().Add(12 * time.Second)
for {
//if after 12 seconds, try a gRPC pull on the last try
if time.Now().After(tperiod) {
ncutils.Log("running pull for " + cfg.Node.Network)
_, err := Pull(cfg.Node.Network, true)
if err != nil {
ncutils.Log("could not run pull, exiting " + cfg.Node.Network + " setup: " + err.Error())
return client
}
time.Sleep(time.Second)
}
if token := client.Connect(); token.Wait() && token.Error() != nil {
ncutils.Log("unable to connect to broker, retrying ...")
if time.Now().After(tperiod) {
ncutils.Log("could not connect to broker, exiting " + cfg.Node.Network + " setup: " + token.Error().Error())
if strings.Contains(token.Error().Error(), "connectex") || strings.Contains(token.Error().Error(), "i/o timeout") {
ncutils.PrintLog("connection issue detected.. pulling and restarting daemon", 0)
Pull(cfg.Node.Network, true)
daemon.Restart()
}
return client
}
} else {
break
}
time.Sleep(2 * time.Second)
}
return client
}
// MessageQueue sets up Message Queue and subsribes/publishes updates to/from server
func MessageQueue(ctx context.Context, network string) {
ncutils.Log("netclient go routine started for " + network)
@ -185,7 +97,7 @@ func MessageQueue(ctx context.Context, network string) {
cfg.ReadConfig()
ncutils.Log("daemon started for network: " + network)
client := SetupMQTT(&cfg, false)
client := setupMQTT(&cfg, false)
defer client.Disconnect(250)
wg := &sync.WaitGroup{}
@ -287,15 +199,15 @@ func NodeUpdate(client mqtt.Client, msg mqtt.Message) {
ncutils.Log("error updating wireguard config " + err.Error())
return
}
if ifaceDelta {
if ifaceDelta { // if a change caused an ifacedelta we need to notify the server to update the peers
ncutils.Log("applying WG conf to " + file)
err = wireguard.ApplyConf(&cfg.Node, cfg.Node.Interface, file)
if err != nil {
ncutils.Log("error restarting wg after node update " + err.Error())
return
}
time.Sleep(time.Second >> 1)
time.Sleep(time.Second >> 1)
if newNode.DNSOn == "yes" {
for _, server := range newNode.NetworkSettings.DefaultServerAddrs {
if server.IsLeader {
@ -304,6 +216,7 @@ func NodeUpdate(client mqtt.Client, msg mqtt.Message) {
}
}
}
publishClientPeers(&cfg)
}
//deal with DNS
if newNode.DNSOn != "yes" && shouldDNSChange && cfg.Node.Interface != "" {
@ -361,39 +274,6 @@ func UpdatePeers(client mqtt.Client, msg mqtt.Message) {
}
}
// MonitorKeepalive - checks time last server keepalive received. If more than 3+ minutes, notify and resubscribe
// func MonitorKeepalive(ctx context.Context, wg *sync.WaitGroup, client mqtt.Client, cfg *config.ClientConfig) {
// defer wg.Done()
// for {
// select {
// case <-ctx.Done():
// ncutils.Log("cancel recieved, monitor keepalive exiting")
// return
// case <-time.After(time.Second * 150):
// var keepalivetime time.Time
// keepaliveval, ok := keepalive.Load(cfg.Node.Network)
// if ok {
// keepalivetime = keepaliveval.(time.Time)
// if !keepalivetime.IsZero() && time.Since(keepalivetime) > time.Second*120 { // more than 2+ minutes
// // ncutils.Log("server keepalive not recieved recently, resubscribe to message queue")
// // err := Resubscribe(client, cfg)
// // if err != nil {
// // ncutils.Log("closing " + err.Error())
// // }
// ncutils.Log("maybe wanna call something")
// }
// }
// }
// }
// }
// ServerKeepAlive -- handler to react to keepalive messages published by server
// func ServerKeepAlive(client mqtt.Client, msg mqtt.Message) {
// var currentTime = time.Now()
// keepalive.Store(parseNetworkFromTopic(msg.Topic()), currentTime)
// ncutils.PrintLog("received server keepalive at "+currentTime.String(), 2)
// }
// UpdateKeys -- updates private key and returns new publickey
func UpdateKeys(cfg *config.ClientConfig, client mqtt.Client) error {
ncutils.Log("received message to update keys")
@ -508,6 +388,103 @@ func Hello(cfg *config.ClientConfig, network string) {
// == Private ==
// setupMQTT creates a connection to broker and return client
func setupMQTT(cfg *config.ClientConfig, publish bool) mqtt.Client {
opts := mqtt.NewClientOptions()
server := getServerAddress(cfg)
opts.AddBroker(server + ":1883")
id := ncutils.MakeRandomString(23)
opts.ClientID = id
opts.SetDefaultPublishHandler(All)
opts.SetAutoReconnect(true)
opts.SetConnectRetry(true)
opts.SetConnectRetryInterval(time.Second << 2)
opts.SetKeepAlive(time.Minute >> 1)
opts.SetWriteTimeout(time.Minute)
opts.SetOnConnectHandler(func(client mqtt.Client) {
if !publish {
if cfg.DebugOn {
if token := client.Subscribe("#", 0, nil); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
ncutils.Log("subscribed to all topics for debugging purposes")
}
if token := client.Subscribe(fmt.Sprintf("update/%s/%s", cfg.Node.Network, cfg.Node.ID), 0, mqtt.MessageHandler(NodeUpdate)); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
if cfg.DebugOn {
ncutils.Log(fmt.Sprintf("subscribed to node updates for node %s update/%s/%s", cfg.Node.Name, cfg.Node.Network, cfg.Node.ID))
}
if token := client.Subscribe(fmt.Sprintf("peers/%s/%s", cfg.Node.Network, cfg.Node.ID), 0, mqtt.MessageHandler(UpdatePeers)); token.Wait() && token.Error() != nil {
ncutils.Log(token.Error().Error())
return
}
if cfg.DebugOn {
ncutils.Log(fmt.Sprintf("subscribed to peer updates for node %s peers/%s/%s", cfg.Node.Name, cfg.Node.Network, cfg.Node.ID))
}
opts.SetOrderMatters(true)
opts.SetResumeSubs(true)
}
})
opts.SetConnectionLostHandler(func(c mqtt.Client, e error) {
ncutils.Log("detected broker connection lost, running pull for " + cfg.Node.Network)
_, err := Pull(cfg.Node.Network, true)
if err != nil {
ncutils.Log("could not run pull, server unreachable: " + err.Error())
ncutils.Log("waiting to retry...")
/*
//Consider putting in logic to restart - daemon may take long time to refresh
time.Sleep(time.Minute * 5)
ncutils.Log("restarting netclient")
daemon.Restart()
*/
}
ncutils.Log("connection re-established with mqtt server")
})
client := mqtt.NewClient(opts)
tperiod := time.Now().Add(12 * time.Second)
for {
//if after 12 seconds, try a gRPC pull on the last try
if time.Now().After(tperiod) {
ncutils.Log("running pull for " + cfg.Node.Network)
_, err := Pull(cfg.Node.Network, true)
if err != nil {
ncutils.Log("could not run pull, exiting " + cfg.Node.Network + " setup: " + err.Error())
return client
}
time.Sleep(time.Second)
}
if token := client.Connect(); token.Wait() && token.Error() != nil {
ncutils.Log("unable to connect to broker, retrying ...")
if time.Now().After(tperiod) {
ncutils.Log("could not connect to broker, exiting " + cfg.Node.Network + " setup: " + token.Error().Error())
if strings.Contains(token.Error().Error(), "connectex") || strings.Contains(token.Error().Error(), "i/o timeout") {
ncutils.PrintLog("connection issue detected.. pulling and restarting daemon", 0)
Pull(cfg.Node.Network, true)
daemon.Restart()
}
return client
}
} else {
break
}
time.Sleep(2 * time.Second)
}
return client
}
// publishes a message to server to update peers on this peer's behalf
func publishClientPeers(cfg *config.ClientConfig) error {
payload := []byte(ncutils.MakeRandomString(16)) // just random string for now to keep the bytes different
if err := publish(cfg, fmt.Sprintf("update/%s", cfg.Node.ID), payload); err != nil {
return err
}
return nil
}
func initialPull(network string) {
ncutils.Log("pulling latest config for " + network)
var configPath = fmt.Sprintf("%snetconfig-%s", ncutils.GetNetclientPathSpecific(), network)
@ -548,7 +525,7 @@ func publish(cfg *config.ClientConfig, dest string, msg []byte) error {
return err
}
client := SetupMQTT(cfg, true)
client := setupMQTT(cfg, true)
defer client.Disconnect(250)
encrypted, err := ncutils.Chunk(msg, serverPubKey, trafficPrivKey)
if err != nil {