open-consul/agent/setup.go

165 lines
4.7 KiB
Go

package agent
import (
"context"
"fmt"
"io"
"net"
"net/http"
"time"
autoconf "github.com/hashicorp/consul/agent/auto-config"
"github.com/hashicorp/consul/agent/cache"
certmon "github.com/hashicorp/consul/agent/cert-monitor"
"github.com/hashicorp/consul/agent/config"
"github.com/hashicorp/consul/agent/pool"
"github.com/hashicorp/consul/agent/router"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/agent/token"
"github.com/hashicorp/consul/ipaddr"
"github.com/hashicorp/consul/lib"
"github.com/hashicorp/consul/logging"
"github.com/hashicorp/consul/tlsutil"
"github.com/hashicorp/go-hclog"
"google.golang.org/grpc/grpclog"
)
// TODO: BaseDeps should be renamed in the future once more of Agent.Start
// has been moved out in front of Agent.New, and we can better see the setup
// dependencies.
type BaseDeps struct {
Logger hclog.InterceptLogger
TLSConfigurator *tlsutil.Configurator // TODO: use an interface
MetricsHandler MetricsHandler
RuntimeConfig *config.RuntimeConfig
Tokens *token.Store
Cache *cache.Cache
AutoConfig *autoconf.AutoConfig // TODO: use an interface
ConnPool *pool.ConnPool // TODO: use an interface
Router *router.Router
}
// MetricsHandler provides an http.Handler for displaying metrics.
type MetricsHandler interface {
DisplayMetrics(resp http.ResponseWriter, req *http.Request) (interface{}, error)
}
type ConfigLoader func(source config.Source) (cfg *config.RuntimeConfig, warnings []string, err error)
func NewBaseDeps(configLoader ConfigLoader, logOut io.Writer) (BaseDeps, error) {
d := BaseDeps{}
cfg, warnings, err := configLoader(nil)
if err != nil {
return d, err
}
logConf := cfg.Logging
logConf.Name = logging.Agent
d.Logger, err = logging.Setup(logConf, logOut)
if err != nil {
return d, err
}
grpclog.SetLoggerV2(logging.NewGRPCLogger(cfg.Logging.LogLevel, d.Logger))
for _, w := range warnings {
d.Logger.Warn(w)
}
cfg.NodeID, err = newNodeIDFromConfig(cfg, d.Logger)
if err != nil {
return d, fmt.Errorf("failed to setup node ID: %w", err)
}
d.MetricsHandler, err = lib.InitTelemetry(cfg.Telemetry)
if err != nil {
return d, fmt.Errorf("failed to initialize telemetry: %w", err)
}
d.TLSConfigurator, err = tlsutil.NewConfigurator(cfg.ToTLSUtilConfig(), d.Logger)
if err != nil {
return d, err
}
d.RuntimeConfig = cfg
d.Tokens = new(token.Store)
// cache-types are not registered yet, but they won't be used until the components are started.
d.Cache = cache.New(cfg.Cache)
d.ConnPool = newConnPool(cfg, d.Logger, d.TLSConfigurator)
deferredAC := &deferredAutoConfig{}
d.Router = router.NewRouter(d.Logger, cfg.Datacenter, fmt.Sprintf("%s.%s", cfg.NodeName, cfg.Datacenter))
cmConf := new(certmon.Config).
WithCache(d.Cache).
WithTLSConfigurator(d.TLSConfigurator).
WithDNSSANs(cfg.AutoConfig.DNSSANs).
WithIPSANs(cfg.AutoConfig.IPSANs).
WithDatacenter(cfg.Datacenter).
WithNodeName(cfg.NodeName).
WithFallback(deferredAC.autoConfigFallbackTLS).
WithLogger(d.Logger.Named(logging.AutoConfig)).
WithTokens(d.Tokens).
WithPersistence(deferredAC.autoConfigPersist)
acCertMon, err := certmon.New(cmConf)
if err != nil {
return d, err
}
acConf := autoconf.Config{
DirectRPC: d.ConnPool,
Logger: d.Logger,
CertMonitor: acCertMon,
Loader: configLoader,
}
d.AutoConfig, err = autoconf.New(acConf)
if err != nil {
return d, err
}
// TODO: can this cyclic dependency be un-cycled?
deferredAC.autoConf = d.AutoConfig
return d, nil
}
func newConnPool(config *config.RuntimeConfig, logger hclog.Logger, tls *tlsutil.Configurator) *pool.ConnPool {
var rpcSrcAddr *net.TCPAddr
if !ipaddr.IsAny(config.RPCBindAddr) {
rpcSrcAddr = &net.TCPAddr{IP: config.RPCBindAddr.IP}
}
pool := &pool.ConnPool{
Server: config.ServerMode,
SrcAddr: rpcSrcAddr,
Logger: logger.StandardLogger(&hclog.StandardLoggerOptions{InferLevels: true}),
TLSConfigurator: tls,
Datacenter: config.Datacenter,
}
if config.ServerMode {
pool.MaxTime = 2 * time.Minute
pool.MaxStreams = 64
} else {
pool.MaxTime = 127 * time.Second
pool.MaxStreams = 32
}
return pool
}
type deferredAutoConfig struct {
autoConf *autoconf.AutoConfig // TODO: use an interface
}
func (a *deferredAutoConfig) autoConfigFallbackTLS(ctx context.Context) (*structs.SignedResponse, error) {
if a.autoConf == nil {
return nil, fmt.Errorf("AutoConfig manager has not been created yet")
}
return a.autoConf.FallbackTLS(ctx)
}
func (a *deferredAutoConfig) autoConfigPersist(resp *structs.SignedResponse) error {
if a.autoConf == nil {
return fmt.Errorf("AutoConfig manager has not been created yet")
}
return a.autoConf.RecordUpdatedCerts(resp)
}