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server.go
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server.go
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package realtime
import (
"context"
"net/http"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"go.uber.org/zap"
managementv1 "github.com/rancher/opni/pkg/apis/management/v1"
"github.com/rancher/opni/pkg/clients"
"github.com/rancher/opni/pkg/config/v1beta1"
"github.com/rancher/opni/pkg/logger"
"github.com/rancher/opni/pkg/realtime/modules"
slomodule "github.com/rancher/opni/pkg/realtime/modules/slo"
)
type RealtimeServer struct {
RealtimeServerOptions
config *v1beta1.RealtimeServerSpec
mgmtClient managementv1.ManagementClient
}
type RealtimeServerOptions struct {
moduleSet *modules.ModuleSet
logger *zap.SugaredLogger
}
type RealtimeServerOption func(*RealtimeServerOptions)
func (o *RealtimeServerOptions) Apply(opts ...RealtimeServerOption) {
for _, op := range opts {
op(o)
}
}
func WithModuleSet(moduleSet *modules.ModuleSet) RealtimeServerOption {
return func(o *RealtimeServerOptions) {
o.moduleSet = moduleSet
}
}
func WithLogger(logger *zap.SugaredLogger) RealtimeServerOption {
return func(o *RealtimeServerOptions) {
o.logger = logger
}
}
func NewServer(conf *v1beta1.RealtimeServerSpec, opts ...RealtimeServerOption) (*RealtimeServer, error) {
options := RealtimeServerOptions{
moduleSet: AllModules(),
}
options.Apply(opts...)
if options.logger == nil {
options.logger = logger.New().Named("rt")
} else {
options.logger = options.logger.Named("rt")
}
return &RealtimeServer{
RealtimeServerOptions: options,
config: conf,
}, nil
}
func (rt *RealtimeServer) Start(ctx context.Context) error {
mgmtClient, err := clients.NewManagementClient(ctx,
clients.WithAddress(rt.config.ManagementClient.Address))
if err != nil {
return err
}
rt.mgmtClient = mgmtClient
reg := prometheus.NewRegistry()
mux := http.NewServeMux()
mux.Handle(rt.config.Metrics.GetPath(), promhttp.HandlerFor(reg, promhttp.HandlerOpts{
Registry: reg,
}))
go func() {
rt.logger.With(
"address", rt.config.MetricsListenAddress,
).Info("starting metrics server")
if err := http.ListenAndServe(rt.config.MetricsListenAddress, mux); err != nil {
rt.logger.With(
zap.Error(err),
).Panic("failed to start metrics server")
}
}()
for _, mod := range rt.moduleSet.Modules() {
lg := rt.logger.With("module", mod.Name())
lg.Info("Starting RT module")
mod := mod
go func() {
if err := mod.Run(ctx, &modules.ModuleContext{
Log: rt.logger.Named(mod.Name()),
Client: rt.mgmtClient,
Reg: reg,
}); err != nil {
lg.With(
zap.Error(err),
).Error("RT module exited with error")
}
lg.Info("RT module stopped")
}()
}
return nil
}
func AllModules() *modules.ModuleSet {
set := modules.NewModuleSet()
slomodule.AddToModuleSet(set)
return set
}