[#100] server auto re-binding

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>
This commit is contained in:
Pavel Pogodaev 2024-03-26 14:34:20 +03:00
parent a95dc6c8c7
commit 11965deb41
7 changed files with 142 additions and 22 deletions

View file

@ -8,6 +8,7 @@ This document outlines major changes between releases.
### Added
- Tree pool traversal limit (#92)
- Add new `reconnect_interval` config param (#100)
### Update from 0.28.0
See new `frostfs.tree_pool_max_attempts` config parameter.

View file

@ -2,6 +2,7 @@ package main
import (
"context"
"errors"
"fmt"
"net/http"
"os"
@ -57,7 +58,10 @@ type (
metrics *gateMetrics
services []*metrics.Service
settings *appSettings
servers []Server
unbindServers []ServerInfo
mu sync.RWMutex
}
// App is an interface for the main gateway function.
@ -78,6 +82,8 @@ type (
// appSettings stores reloading parameters, so it has to provide getters and setters which use RWMutex.
appSettings struct {
reconnectInterval time.Duration
mu sync.RWMutex
defaultTimestamp bool
zipCompression bool
@ -199,8 +205,9 @@ func (s *appSettings) setBufferMaxSizeForPut(val uint64) {
}
func (a *app) initAppSettings() {
a.settings = &appSettings{}
a.settings = &appSettings{
reconnectInterval: fetchReconnectInterval(a.cfg),
}
a.updateSettings()
}
@ -399,16 +406,22 @@ func (a *app) Serve() {
a.startServices()
a.initServers(a.ctx)
for i := range a.servers {
servs := a.getServers()
for i := range servs {
go func(i int) {
a.log.Info(logs.StartingServer, zap.String("address", a.servers[i].Address()))
if err := a.webServer.Serve(a.servers[i].Listener()); err != nil && err != http.ErrServerClosed {
a.metrics.MarkUnhealthy(a.servers[i].Address())
a.log.Info(logs.StartingServer, zap.String("address", servs[i].Address()))
if err := a.webServer.Serve(servs[i].Listener()); err != nil && err != http.ErrServerClosed {
a.metrics.MarkUnhealthy(servs[i].Address())
a.log.Fatal(logs.ListenAndServe, zap.Error(err))
}
}(i)
}
if len(a.unbindServers) != 0 {
a.scheduleReconnect(a.ctx, a.webServer)
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGHUP)
@ -598,7 +611,7 @@ func (a *app) AppParams() *utils.AppParams {
}
func (a *app) initServers(ctx context.Context) {
serversInfo := fetchServers(a.cfg)
serversInfo := fetchServers(a.cfg, a.log)
a.servers = make([]Server, 0, len(serversInfo))
for _, serverInfo := range serversInfo {
@ -608,6 +621,7 @@ func (a *app) initServers(ctx context.Context) {
}
srv, err := newServer(ctx, serverInfo)
if err != nil {
a.unbindServers = append(a.unbindServers, serverInfo)
a.metrics.MarkUnhealthy(serverInfo.Address)
a.log.Warn(logs.FailedToAddServer, append(fields, zap.Error(err))...)
continue
@ -624,22 +638,25 @@ func (a *app) initServers(ctx context.Context) {
}
func (a *app) updateServers() error {
serversInfo := fetchServers(a.cfg)
serversInfo := fetchServers(a.cfg, a.log)
a.mu.Lock()
defer a.mu.Unlock()
var found bool
for _, serverInfo := range serversInfo {
index := a.serverIndex(serverInfo.Address)
if index == -1 {
continue
}
ser := a.getServer(serverInfo.Address)
if ser != nil {
if serverInfo.TLS.Enabled {
if err := a.servers[index].UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
if err := ser.UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
return fmt.Errorf("failed to update tls certs: %w", err)
}
}
found = true
}
} else if unbind := a.updateUnbindServerInfo(serverInfo); unbind {
found = true
}
}
if !found {
return fmt.Errorf("invalid servers configuration: no known server found")
@ -648,13 +665,29 @@ func (a *app) updateServers() error {
return nil
}
func (a *app) serverIndex(address string) int {
func (a *app) getServers() []Server {
a.mu.RLock()
defer a.mu.RUnlock()
return a.servers
}
func (a *app) getServer(address string) Server {
for i := range a.servers {
if a.servers[i].Address() == address {
return i
return a.servers[i]
}
}
return -1
return nil
}
func (a *app) updateUnbindServerInfo(info ServerInfo) bool {
for i := range a.unbindServers {
if a.unbindServers[i].Address == info.Address {
a.unbindServers[i] = info
return true
}
}
return false
}
func (a *app) initTracing(ctx context.Context) {
@ -727,3 +760,60 @@ func (s *appSettings) setDefaultNamespaces(namespaces []string) {
s.defaultNamespaces = namespaces
s.mu.Unlock()
}
func (a *app) scheduleReconnect(ctx context.Context, srv *fasthttp.Server) {
go func() {
t := time.NewTicker(a.settings.reconnectInterval)
defer t.Stop()
for {
select {
case <-t.C:
if a.tryReconnect(ctx, srv) {
return
}
t.Reset(a.settings.reconnectInterval)
case <-ctx.Done():
return
}
}
}()
}
func (a *app) tryReconnect(ctx context.Context, sr *fasthttp.Server) bool {
a.mu.Lock()
defer a.mu.Unlock()
a.log.Info(logs.ServerReconnecting)
var failedServers []ServerInfo
for _, serverInfo := range a.unbindServers {
fields := []zap.Field{
zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
}
srv, err := newServer(ctx, serverInfo)
if err != nil {
a.log.Warn(logs.ServerReconnectFailed, zap.Error(err))
failedServers = append(failedServers, serverInfo)
a.metrics.MarkUnhealthy(serverInfo.Address)
continue
}
go func() {
a.log.Info(logs.StartingServer, zap.String("address", srv.Address()))
a.metrics.MarkHealthy(serverInfo.Address)
if err = sr.Serve(srv.Listener()); err != nil && !errors.Is(err, http.ErrServerClosed) {
a.log.Warn(logs.ListenAndServe, zap.Error(err))
a.metrics.MarkUnhealthy(serverInfo.Address)
}
}()
a.servers = append(a.servers, srv)
a.log.Info(logs.ServerReconnectedSuccessfully, fields...)
}
a.unbindServers = failedServers
return len(a.unbindServers) == 0
}

View file

@ -51,11 +51,15 @@ const (
defaultNamespaceHeader = "X-Frostfs-Namespace"
defaultReconnectInterval = time.Minute
cfgServer = "server"
cfgTLSEnabled = "tls.enabled"
cfgTLSCertFile = "tls.cert_file"
cfgTLSKeyFile = "tls.key_file"
cfgReconnectInterval = "reconnect_interval"
// Web.
cfgWebReadBufferSize = "web.read_buffer_size"
cfgWebWriteBufferSize = "web.write_buffer_size"
@ -454,8 +458,18 @@ func getLogLevel(v *viper.Viper) (zapcore.Level, error) {
return lvl, nil
}
func fetchServers(v *viper.Viper) []ServerInfo {
func fetchReconnectInterval(cfg *viper.Viper) time.Duration {
reconnect := cfg.GetDuration(cfgReconnectInterval)
if reconnect <= 0 {
reconnect = defaultReconnectInterval
}
return reconnect
}
func fetchServers(v *viper.Viper, log *zap.Logger) []ServerInfo {
var servers []ServerInfo
seen := make(map[string]struct{})
for i := 0; ; i++ {
key := cfgServer + "." + strconv.Itoa(i) + "."
@ -470,6 +484,11 @@ func fetchServers(v *viper.Viper) []ServerInfo {
break
}
if _, ok := seen[serverInfo.Address]; ok {
log.Warn(logs.WarnDuplicateAddress, zap.String("address", serverInfo.Address))
continue
}
seen[serverInfo.Address] = struct{}{}
servers = append(servers, serverInfo)
}

View file

@ -26,6 +26,9 @@ HTTP_GW_SERVER_1_TLS_ENABLED=true
HTTP_GW_SERVER_1_TLS_CERT_FILE=/path/to/tls/cert
HTTP_GW_SERVER_1_TLS_KEY_FILE=/path/to/tls/key
# How often to reconnect to the servers
HTTP_GW_RECONNECT_INTERVAL: 1m
# Nodes configuration.
# This configuration make the gateway use the first node (grpc://s01.frostfs.devenv:8080)
# while it's healthy. Otherwise, the gateway use the second node (grpc://s01.frostfs.devenv:8080)

View file

@ -55,6 +55,7 @@ peers:
priority: 2
weight: 9
reconnect_interval: 1m
web:
# Per-connection buffer size for requests' reading.

View file

@ -72,6 +72,7 @@ stream_timeout: 10s
request_timeout: 5s
rebalance_timer: 30s
pool_error_threshold: 100
reconnect_interval: 1m
```
| Parameter | Type | SIGHUP reload | Default value | Description |
@ -83,6 +84,7 @@ pool_error_threshold: 100
| `request_timeout` | `duration` | | `15s` | Timeout to check node health during rebalance. |
| `rebalance_timer` | `duration` | | `60s` | Interval to check node health. |
| `pool_error_threshold` | `uint32` | | `100` | The number of errors on connection after which node is considered as unhealthy. |
| `reconnect_interval` | `duration` | no | `1m` | Listeners reconnection interval. |
# `wallet` section

View file

@ -73,4 +73,8 @@ const (
InvalidLifetimeUsingDefaultValue = "invalid lifetime, using default value (in seconds)" // Error in ../../cmd/http-gw/settings.go
InvalidCacheSizeUsingDefaultValue = "invalid cache size, using default value" // Error in ../../cmd/http-gw/settings.go
FailedToUnescapeQuery = "failed to unescape query"
ServerReconnecting = "reconnecting server..."
ServerReconnectedSuccessfully = "server reconnected successfully"
ServerReconnectFailed = "failed to reconnect server"
WarnDuplicateAddress = "duplicate address"
)