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core.go
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core.go
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package modules
import (
"context"
"crypto/rand"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/gbrlsnchs/jwt/v3"
logging "github.com/ipfs/go-log/v2"
"github.com/libp2p/go-libp2p-core/peerstore"
record "github.com/libp2p/go-libp2p-record"
"github.com/raulk/go-watchdog"
"go.uber.org/fx"
"github.com/filecoin-project/go-jsonrpc/auth"
"github.com/filecoin-project/boost/api"
"github.com/filecoin-project/boost/node/modules/dtypes"
lotus_repo "github.com/filecoin-project/lotus/node/repo"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/lib/addrutil"
"github.com/filecoin-project/lotus/system"
)
const (
// EnvWatchdogDisabled is an escape hatch to disable the watchdog explicitly
// in case an OS/kernel appears to report incorrect information. The
// watchdog will be disabled if the value of this env variable is 1.
EnvWatchdogDisabled = "LOTUS_DISABLE_WATCHDOG"
)
const (
JWTSecretName = "auth-jwt-private" //nolint:gosec
KTJwtHmacSecret = "jwt-hmac-secret" //nolint:gosec
)
var (
log = logging.Logger("modules")
logWatchdog = logging.Logger("watchdog")
)
type Genesis func() (*types.BlockHeader, error)
// RecordValidator provides namesys compatible routing record validator
func RecordValidator(ps peerstore.Peerstore) record.Validator {
return record.NamespacedValidator{
"pk": record.PublicKeyValidator{},
}
}
// MemoryConstraints returns the memory constraints configured for this system.
func MemoryConstraints() system.MemoryConstraints {
constraints := system.GetMemoryConstraints()
log.Infow("memory limits initialized",
"max_mem_heap", constraints.MaxHeapMem,
"total_system_mem", constraints.TotalSystemMem,
"effective_mem_limit", constraints.EffectiveMemLimit)
return constraints
}
// MemoryWatchdog starts the memory watchdog, applying the computed resource
// constraints.
func MemoryWatchdog(lr lotus_repo.LockedRepo, lc fx.Lifecycle, constraints system.MemoryConstraints) {
if os.Getenv(EnvWatchdogDisabled) == "1" {
log.Infof("memory watchdog is disabled via %s", EnvWatchdogDisabled)
return
}
// configure heap profile capture so that one is captured per episode where
// utilization climbs over 90% of the limit. A maximum of 10 heapdumps
// will be captured during life of this process.
watchdog.HeapProfileDir = filepath.Join(lr.Path(), "heapprof")
watchdog.HeapProfileMaxCaptures = 10
watchdog.HeapProfileThreshold = 0.9
watchdog.Logger = logWatchdog
policy := watchdog.NewWatermarkPolicy(0.50, 0.60, 0.70, 0.85, 0.90, 0.925, 0.95)
// Try to initialize a watchdog in the following order of precedence:
// 1. If a max heap limit has been provided, initialize a heap-driven watchdog.
// 2. Else, try to initialize a cgroup-driven watchdog.
// 3. Else, try to initialize a system-driven watchdog.
// 4. Else, log a warning that the system is flying solo, and return.
addStopHook := func(stopFn func()) {
lc.Append(fx.Hook{
OnStop: func(ctx context.Context) error {
stopFn()
return nil
},
})
}
// 1. If user has set max heap limit, apply it.
if maxHeap := constraints.MaxHeapMem; maxHeap != 0 {
const minGOGC = 10
err, stopFn := watchdog.HeapDriven(maxHeap, minGOGC, policy)
if err == nil {
log.Infof("initialized heap-driven watchdog; max heap: %d bytes", maxHeap)
addStopHook(stopFn)
return
}
log.Warnf("failed to initialize heap-driven watchdog; err: %s", err)
log.Warnf("trying a cgroup-driven watchdog")
}
// 2. cgroup-driven watchdog.
err, stopFn := watchdog.CgroupDriven(5*time.Second, policy)
if err == nil {
log.Infof("initialized cgroup-driven watchdog")
addStopHook(stopFn)
return
}
log.Warnf("failed to initialize cgroup-driven watchdog; err: %s", err)
log.Warnf("trying a system-driven watchdog")
// 3. system-driven watchdog.
err, stopFn = watchdog.SystemDriven(0, 5*time.Second, policy) // 0 calculates the limit automatically.
if err == nil {
log.Infof("initialized system-driven watchdog")
addStopHook(stopFn)
return
}
// 4. log the failure
log.Warnf("failed to initialize system-driven watchdog; err: %s", err)
log.Warnf("system running without a memory watchdog")
}
type JwtPayload struct {
Allow []auth.Permission
}
func APISecret(keystore types.KeyStore, lr lotus_repo.LockedRepo) (*dtypes.APIAlg, error) {
key, err := keystore.Get(JWTSecretName)
if errors.Is(err, types.ErrKeyInfoNotFound) {
log.Warn("Generating new API secret")
sk, err := ioutil.ReadAll(io.LimitReader(rand.Reader, 32))
if err != nil {
return nil, err
}
key = types.KeyInfo{
Type: KTJwtHmacSecret,
PrivateKey: sk,
}
if err := keystore.Put(JWTSecretName, key); err != nil {
return nil, fmt.Errorf("writing API secret: %w", err)
}
// TODO: make this configurable
p := JwtPayload{
Allow: api.AllPermissions,
}
cliToken, err := jwt.Sign(&p, jwt.NewHS256(key.PrivateKey))
if err != nil {
return nil, err
}
if err := lr.SetAPIToken(cliToken); err != nil {
return nil, err
}
} else if err != nil {
return nil, fmt.Errorf("could not get JWT Token: %w", err)
}
return (*dtypes.APIAlg)(jwt.NewHS256(key.PrivateKey)), nil
}
func ConfigBootstrap(peers []string) func() (dtypes.BootstrapPeers, error) {
return func() (dtypes.BootstrapPeers, error) {
return addrutil.ParseAddresses(context.TODO(), peers)
}
}