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updated GHA
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Update to v2 SDK
updated dependencies
This commit is contained in:
Tobias Trabelsi
2022-08-06 16:21:18 +02:00
parent 989e7079a5
commit e1266ebf64
1909 changed files with 122367 additions and 279095 deletions
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274
vendor/google.golang.org/grpc/balancer/balancer.go generated vendored
View File

@ -27,6 +27,7 @@ import (
"net"
"strings"
"google.golang.org/grpc/channelz"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/internal"
@ -75,24 +76,26 @@ func Get(name string) Builder {
return nil
}
// SubConn represents a gRPC sub connection.
// Each sub connection contains a list of addresses. gRPC will
// try to connect to them (in sequence), and stop trying the
// remainder once one connection is successful.
// A SubConn represents a single connection to a gRPC backend service.
//
// The reconnect backoff will be applied on the list, not a single address.
// For example, try_on_all_addresses -> backoff -> try_on_all_addresses.
// Each SubConn contains a list of addresses.
//
// All SubConns start in IDLE, and will not try to connect. To trigger
// the connecting, Balancers must call Connect.
// When the connection encounters an error, it will reconnect immediately.
// When the connection becomes IDLE, it will not reconnect unless Connect is
// called.
// All SubConns start in IDLE, and will not try to connect. To trigger the
// connecting, Balancers must call Connect. If a connection re-enters IDLE,
// Balancers must call Connect again to trigger a new connection attempt.
//
// This interface is to be implemented by gRPC. Users should not need a
// brand new implementation of this interface. For the situations like
// testing, the new implementation should embed this interface. This allows
// gRPC to add new methods to this interface.
// gRPC will try to connect to the addresses in sequence, and stop trying the
// remainder once the first connection is successful. If an attempt to connect
// to all addresses encounters an error, the SubConn will enter
// TRANSIENT_FAILURE for a backoff period, and then transition to IDLE.
//
// Once established, if a connection is lost, the SubConn will transition
// directly to IDLE.
//
// This interface is to be implemented by gRPC. Users should not need their own
// implementation of this interface. For situations like testing, any
// implementations should embed this interface. This allows gRPC to add new
// methods to this interface.
type SubConn interface {
// UpdateAddresses updates the addresses used in this SubConn.
// gRPC checks if currently-connected address is still in the new list.
@ -101,6 +104,9 @@ type SubConn interface {
// a new connection will be created.
//
// This will trigger a state transition for the SubConn.
//
// Deprecated: This method is now part of the ClientConn interface and will
// eventually be removed from here.
UpdateAddresses([]resolver.Address)
// Connect starts the connecting for this SubConn.
Connect()
@ -111,6 +117,9 @@ type NewSubConnOptions struct {
// CredsBundle is the credentials bundle that will be used in the created
// SubConn. If it's nil, the original creds from grpc DialOptions will be
// used.
//
// Deprecated: Use the Attributes field in resolver.Address to pass
// arbitrary data to the credential handshaker.
CredsBundle credentials.Bundle
// HealthCheckEnabled indicates whether health check service should be
// enabled on this SubConn
@ -123,7 +132,7 @@ type State struct {
// determine the state of the ClientConn.
ConnectivityState connectivity.State
// Picker is used to choose connections (SubConns) for RPCs.
Picker V2Picker
Picker Picker
}
// ClientConn represents a gRPC ClientConn.
@ -140,21 +149,19 @@ type ClientConn interface {
// RemoveSubConn removes the SubConn from ClientConn.
// The SubConn will be shutdown.
RemoveSubConn(SubConn)
// UpdateBalancerState is called by balancer to notify gRPC that some internal
// state in balancer has changed.
// UpdateAddresses updates the addresses used in the passed in SubConn.
// gRPC checks if the currently connected address is still in the new list.
// If so, the connection will be kept. Else, the connection will be
// gracefully closed, and a new connection will be created.
//
// gRPC will update the connectivity state of the ClientConn, and will call pick
// on the new picker to pick new SubConn.
//
// Deprecated: use UpdateState instead
UpdateBalancerState(s connectivity.State, p Picker)
// This will trigger a state transition for the SubConn.
UpdateAddresses(SubConn, []resolver.Address)
// UpdateState notifies gRPC that the balancer's internal state has
// changed.
//
// gRPC will update the connectivity state of the ClientConn, and will call pick
// on the new picker to pick new SubConns.
// gRPC will update the connectivity state of the ClientConn, and will call
// Pick on the new Picker to pick new SubConns.
UpdateState(State)
// ResolveNow is called by balancer to notify gRPC to do a name resolving.
@ -168,21 +175,32 @@ type ClientConn interface {
// BuildOptions contains additional information for Build.
type BuildOptions struct {
// DialCreds is the transport credential the Balancer implementation can
// use to dial to a remote load balancer server. The Balancer implementations
// can ignore this if it does not need to talk to another party securely.
// DialCreds is the transport credentials to use when communicating with a
// remote load balancer server. Balancer implementations which do not
// communicate with a remote load balancer server can ignore this field.
DialCreds credentials.TransportCredentials
// CredsBundle is the credentials bundle that the Balancer can use.
// CredsBundle is the credentials bundle to use when communicating with a
// remote load balancer server. Balancer implementations which do not
// communicate with a remote load balancer server can ignore this field.
CredsBundle credentials.Bundle
// Dialer is the custom dialer the Balancer implementation can use to dial
// to a remote load balancer server. The Balancer implementations
// can ignore this if it doesn't need to talk to remote balancer.
// Dialer is the custom dialer to use when communicating with a remote load
// balancer server. Balancer implementations which do not communicate with a
// remote load balancer server can ignore this field.
Dialer func(context.Context, string) (net.Conn, error)
// ChannelzParentID is the entity parent's channelz unique identification number.
ChannelzParentID int64
// Target contains the parsed address info of the dial target. It is the same resolver.Target as
// passed to the resolver.
// See the documentation for the resolver.Target type for details about what it contains.
// Authority is the server name to use as part of the authentication
// handshake when communicating with a remote load balancer server. Balancer
// implementations which do not communicate with a remote load balancer
// server can ignore this field.
Authority string
// ChannelzParentID is the parent ClientConn's channelz ID.
ChannelzParentID *channelz.Identifier
// CustomUserAgent is the custom user agent set on the parent ClientConn.
// The balancer should set the same custom user agent if it creates a
// ClientConn.
CustomUserAgent string
// Target contains the parsed address info of the dial target. It is the
// same resolver.Target as passed to the resolver. See the documentation for
// the resolver.Target type for details about what it contains.
Target resolver.Target
}
@ -232,56 +250,17 @@ type DoneInfo struct {
var (
// ErrNoSubConnAvailable indicates no SubConn is available for pick().
// gRPC will block the RPC until a new picker is available via UpdateBalancerState().
// gRPC will block the RPC until a new picker is available via UpdateState().
ErrNoSubConnAvailable = errors.New("no SubConn is available")
// ErrTransientFailure indicates all SubConns are in TransientFailure.
// WaitForReady RPCs will block, non-WaitForReady RPCs will fail.
ErrTransientFailure = TransientFailureError(errors.New("all SubConns are in TransientFailure"))
//
// Deprecated: return an appropriate error based on the last resolution or
// connection attempt instead. The behavior is the same for any non-gRPC
// status error.
ErrTransientFailure = errors.New("all SubConns are in TransientFailure")
)
// Picker is used by gRPC to pick a SubConn to send an RPC.
// Balancer is expected to generate a new picker from its snapshot every time its
// internal state has changed.
//
// The pickers used by gRPC can be updated by ClientConn.UpdateBalancerState().
//
// Deprecated: use V2Picker instead
type Picker interface {
// Pick returns the SubConn to be used to send the RPC.
// The returned SubConn must be one returned by NewSubConn().
//
// This functions is expected to return:
// - a SubConn that is known to be READY;
// - ErrNoSubConnAvailable if no SubConn is available, but progress is being
// made (for example, some SubConn is in CONNECTING mode);
// - other errors if no active connecting is happening (for example, all SubConn
// are in TRANSIENT_FAILURE mode).
//
// If a SubConn is returned:
// - If it is READY, gRPC will send the RPC on it;
// - If it is not ready, or becomes not ready after it's returned, gRPC will
// block until UpdateBalancerState() is called and will call pick on the
// new picker. The done function returned from Pick(), if not nil, will be
// called with nil error, no bytes sent and no bytes received.
//
// If the returned error is not nil:
// - If the error is ErrNoSubConnAvailable, gRPC will block until UpdateBalancerState()
// - If the error is ErrTransientFailure or implements IsTransientFailure()
// bool, returning true:
// - If the RPC is wait-for-ready, gRPC will block until UpdateBalancerState()
// is called to pick again;
// - Otherwise, RPC will fail with unavailable error.
// - Else (error is other non-nil error):
// - The RPC will fail with the error's status code, or Unknown if it is
// not a status error.
//
// The returned done() function will be called once the rpc has finished,
// with the final status of that RPC. If the SubConn returned is not a
// valid SubConn type, done may not be called. done may be nil if balancer
// doesn't care about the RPC status.
Pick(ctx context.Context, info PickInfo) (conn SubConn, done func(DoneInfo), err error)
}
// PickResult contains information related to a connection chosen for an RPC.
type PickResult struct {
// SubConn is the connection to use for this pick, if its state is Ready.
@ -297,24 +276,19 @@ type PickResult struct {
Done func(DoneInfo)
}
type transientFailureError struct {
error
}
// TransientFailureError returns e. It exists for backward compatibility and
// will be deleted soon.
//
// Deprecated: no longer necessary, picker errors are treated this way by
// default.
func TransientFailureError(e error) error { return e }
func (e *transientFailureError) IsTransientFailure() bool { return true }
// TransientFailureError wraps err in an error implementing
// IsTransientFailure() bool, returning true.
func TransientFailureError(err error) error {
return &transientFailureError{error: err}
}
// V2Picker is used by gRPC to pick a SubConn to send an RPC.
// Picker is used by gRPC to pick a SubConn to send an RPC.
// Balancer is expected to generate a new picker from its snapshot every time its
// internal state has changed.
//
// The pickers used by gRPC can be updated by ClientConn.UpdateBalancerState().
type V2Picker interface {
// The pickers used by gRPC can be updated by ClientConn.UpdateState().
type Picker interface {
// Pick returns the connection to use for this RPC and related information.
//
// Pick should not block. If the balancer needs to do I/O or any blocking
@ -327,14 +301,13 @@ type V2Picker interface {
// - If the error is ErrNoSubConnAvailable, gRPC will block until a new
// Picker is provided by the balancer (using ClientConn.UpdateState).
//
// - If the error implements IsTransientFailure() bool, returning true,
// wait for ready RPCs will wait, but non-wait for ready RPCs will be
// terminated with this error's Error() string and status code
// Unavailable.
// - If the error is a status error (implemented by the grpc/status
// package), gRPC will terminate the RPC with the code and message
// provided.
//
// - Any other errors terminate all RPCs with the code and message
// provided. If the error is not a status error, it will be converted by
// gRPC to a status error with code Unknown.
// - For all other errors, wait for ready RPCs will wait, but non-wait for
// ready RPCs will be terminated with this error's Error() string and
// status code Unavailable.
Pick(info PickInfo) (PickResult, error)
}
@ -343,34 +316,40 @@ type V2Picker interface {
//
// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs.
//
// HandleSubConnectionStateChange, HandleResolvedAddrs and Close are guaranteed
// to be called synchronously from the same goroutine.
// There's no guarantee on picker.Pick, it may be called anytime.
// UpdateClientConnState, ResolverError, UpdateSubConnState, and Close are
// guaranteed to be called synchronously from the same goroutine. There's no
// guarantee on picker.Pick, it may be called anytime.
type Balancer interface {
// HandleSubConnStateChange is called by gRPC when the connectivity state
// of sc has changed.
// Balancer is expected to aggregate all the state of SubConn and report
// that back to gRPC.
// Balancer should also generate and update Pickers when its internal state has
// been changed by the new state.
//
// Deprecated: if V2Balancer is implemented by the Balancer,
// UpdateSubConnState will be called instead.
HandleSubConnStateChange(sc SubConn, state connectivity.State)
// HandleResolvedAddrs is called by gRPC to send updated resolved addresses to
// balancers.
// Balancer can create new SubConn or remove SubConn with the addresses.
// An empty address slice and a non-nil error will be passed if the resolver returns
// non-nil error to gRPC.
//
// Deprecated: if V2Balancer is implemented by the Balancer,
// UpdateClientConnState will be called instead.
HandleResolvedAddrs([]resolver.Address, error)
// UpdateClientConnState is called by gRPC when the state of the ClientConn
// changes. If the error returned is ErrBadResolverState, the ClientConn
// will begin calling ResolveNow on the active name resolver with
// exponential backoff until a subsequent call to UpdateClientConnState
// returns a nil error. Any other errors are currently ignored.
UpdateClientConnState(ClientConnState) error
// ResolverError is called by gRPC when the name resolver reports an error.
ResolverError(error)
// UpdateSubConnState is called by gRPC when the state of a SubConn
// changes.
UpdateSubConnState(SubConn, SubConnState)
// Close closes the balancer. The balancer is not required to call
// ClientConn.RemoveSubConn for its existing SubConns.
Close()
}
// ExitIdler is an optional interface for balancers to implement. If
// implemented, ExitIdle will be called when ClientConn.Connect is called, if
// the ClientConn is idle. If unimplemented, ClientConn.Connect will cause
// all SubConns to connect.
//
// Notice: it will be required for all balancers to implement this in a future
// release.
type ExitIdler interface {
// ExitIdle instructs the LB policy to reconnect to backends / exit the
// IDLE state, if appropriate and possible. Note that SubConns that enter
// the IDLE state will not reconnect until SubConn.Connect is called.
ExitIdle()
}
// SubConnState describes the state of a SubConn.
type SubConnState struct {
// ConnectivityState is the connectivity state of the SubConn.
@ -393,34 +372,15 @@ type ClientConnState struct {
// problem with the provided name resolver data.
var ErrBadResolverState = errors.New("bad resolver state")
// V2Balancer is defined for documentation purposes. If a Balancer also
// implements V2Balancer, its UpdateClientConnState method will be called
// instead of HandleResolvedAddrs and its UpdateSubConnState will be called
// instead of HandleSubConnStateChange.
type V2Balancer interface {
// UpdateClientConnState is called by gRPC when the state of the ClientConn
// changes. If the error returned is ErrBadResolverState, the ClientConn
// will begin calling ResolveNow on the active name resolver with
// exponential backoff until a subsequent call to UpdateClientConnState
// returns a nil error. Any other errors are currently ignored.
UpdateClientConnState(ClientConnState) error
// ResolverError is called by gRPC when the name resolver reports an error.
ResolverError(error)
// UpdateSubConnState is called by gRPC when the state of a SubConn
// changes.
UpdateSubConnState(SubConn, SubConnState)
// Close closes the balancer. The balancer is not required to call
// ClientConn.RemoveSubConn for its existing SubConns.
Close()
}
// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns
// and returns one aggregated connectivity state.
//
// It's not thread safe.
type ConnectivityStateEvaluator struct {
numReady uint64 // Number of addrConns in ready state.
numConnecting uint64 // Number of addrConns in connecting state.
numReady uint64 // Number of addrConns in ready state.
numConnecting uint64 // Number of addrConns in connecting state.
numTransientFailure uint64 // Number of addrConns in transient failure state.
numIdle uint64 // Number of addrConns in idle state.
}
// RecordTransition records state change happening in subConn and based on that
@ -428,9 +388,11 @@ type ConnectivityStateEvaluator struct {
//
// - If at least one SubConn in Ready, the aggregated state is Ready;
// - Else if at least one SubConn in Connecting, the aggregated state is Connecting;
// - Else the aggregated state is TransientFailure.
// - Else if at least one SubConn is TransientFailure, the aggregated state is Transient Failure;
// - Else if at least one SubConn is Idle, the aggregated state is Idle;
// - Else there are no subconns and the aggregated state is Transient Failure
//
// Idle and Shutdown are not considered.
// Shutdown is not considered.
func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State {
// Update counters.
for idx, state := range []connectivity.State{oldState, newState} {
@ -440,6 +402,10 @@ func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState conne
cse.numReady += updateVal
case connectivity.Connecting:
cse.numConnecting += updateVal
case connectivity.TransientFailure:
cse.numTransientFailure += updateVal
case connectivity.Idle:
cse.numIdle += updateVal
}
}
@ -450,5 +416,11 @@ func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState conne
if cse.numConnecting > 0 {
return connectivity.Connecting
}
if cse.numTransientFailure > 0 {
return connectivity.TransientFailure
}
if cse.numIdle > 0 {
return connectivity.Idle
}
return connectivity.TransientFailure
}

198
vendor/google.golang.org/grpc/balancer/base/balancer.go generated vendored
View File

@ -19,7 +19,6 @@
package base
import (
"context"
"errors"
"fmt"
@ -29,32 +28,29 @@ import (
"google.golang.org/grpc/resolver"
)
var logger = grpclog.Component("balancer")
type baseBuilder struct {
name string
pickerBuilder PickerBuilder
v2PickerBuilder V2PickerBuilder
config Config
name string
pickerBuilder PickerBuilder
config Config
}
func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
bal := &baseBalancer{
cc: cc,
pickerBuilder: bb.pickerBuilder,
v2PickerBuilder: bb.v2PickerBuilder,
cc: cc,
pickerBuilder: bb.pickerBuilder,
subConns: make(map[resolver.Address]balancer.SubConn),
subConns: resolver.NewAddressMap(),
scStates: make(map[balancer.SubConn]connectivity.State),
csEvltr: &balancer.ConnectivityStateEvaluator{},
config: bb.config,
state: connectivity.Connecting,
}
// Initialize picker to a picker that always returns
// ErrNoSubConnAvailable, because when state of a SubConn changes, we
// may call UpdateState with this picker.
if bb.pickerBuilder != nil {
bal.picker = NewErrPicker(balancer.ErrNoSubConnAvailable)
} else {
bal.v2Picker = NewErrPickerV2(balancer.ErrNoSubConnAvailable)
}
bal.picker = NewErrPicker(balancer.ErrNoSubConnAvailable)
return bal
}
@ -62,88 +58,86 @@ func (bb *baseBuilder) Name() string {
return bb.name
}
var _ balancer.V2Balancer = (*baseBalancer)(nil) // Assert that we implement V2Balancer
type baseBalancer struct {
cc balancer.ClientConn
pickerBuilder PickerBuilder
v2PickerBuilder V2PickerBuilder
cc balancer.ClientConn
pickerBuilder PickerBuilder
csEvltr *balancer.ConnectivityStateEvaluator
state connectivity.State
subConns map[resolver.Address]balancer.SubConn
subConns *resolver.AddressMap
scStates map[balancer.SubConn]connectivity.State
picker balancer.Picker
v2Picker balancer.V2Picker
config Config
resolverErr error // the last error reported by the resolver; cleared on successful resolution
connErr error // the last connection error; cleared upon leaving TransientFailure
}
func (b *baseBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
panic("not implemented")
}
func (b *baseBalancer) ResolverError(err error) {
b.resolverErr = err
if len(b.subConns) == 0 {
if b.subConns.Len() == 0 {
b.state = connectivity.TransientFailure
}
if b.state != connectivity.TransientFailure {
// The picker will not change since the balancer does not currently
// report an error.
return
}
b.regeneratePicker()
if b.picker != nil {
b.cc.UpdateBalancerState(b.state, b.picker)
} else {
b.cc.UpdateState(balancer.State{
ConnectivityState: b.state,
Picker: b.v2Picker,
})
}
b.cc.UpdateState(balancer.State{
ConnectivityState: b.state,
Picker: b.picker,
})
}
func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
// TODO: handle s.ResolverState.Err (log if not nil) once implemented.
// TODO: handle s.ResolverState.ServiceConfig?
if grpclog.V(2) {
grpclog.Infoln("base.baseBalancer: got new ClientConn state: ", s)
}
if len(s.ResolverState.Addresses) == 0 {
b.ResolverError(errors.New("produced zero addresses"))
return balancer.ErrBadResolverState
if logger.V(2) {
logger.Info("base.baseBalancer: got new ClientConn state: ", s)
}
// Successful resolution; clear resolver error and ensure we return nil.
b.resolverErr = nil
// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
addrsSet := make(map[resolver.Address]struct{})
addrsSet := resolver.NewAddressMap()
for _, a := range s.ResolverState.Addresses {
addrsSet[a] = struct{}{}
if _, ok := b.subConns[a]; !ok {
addrsSet.Set(a, nil)
if _, ok := b.subConns.Get(a); !ok {
// a is a new address (not existing in b.subConns).
sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{HealthCheckEnabled: b.config.HealthCheck})
if err != nil {
grpclog.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
logger.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
continue
}
b.subConns[a] = sc
b.subConns.Set(a, sc)
b.scStates[sc] = connectivity.Idle
b.csEvltr.RecordTransition(connectivity.Shutdown, connectivity.Idle)
sc.Connect()
}
}
for a, sc := range b.subConns {
for _, a := range b.subConns.Keys() {
sci, _ := b.subConns.Get(a)
sc := sci.(balancer.SubConn)
// a was removed by resolver.
if _, ok := addrsSet[a]; !ok {
if _, ok := addrsSet.Get(a); !ok {
b.cc.RemoveSubConn(sc)
delete(b.subConns, a)
b.subConns.Delete(a)
// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
// The entry will be deleted in HandleSubConnStateChange.
// The entry will be deleted in UpdateSubConnState.
}
}
// If resolver state contains no addresses, return an error so ClientConn
// will trigger re-resolve. Also records this as an resolver error, so when
// the overall state turns transient failure, the error message will have
// the zero address information.
if len(s.ResolverState.Addresses) == 0 {
b.ResolverError(errors.New("produced zero addresses"))
return balancer.ErrBadResolverState
}
b.regeneratePicker()
b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.picker})
return nil
}
@ -167,49 +161,41 @@ func (b *baseBalancer) mergeErrors() error {
// - built by the pickerBuilder with all READY SubConns otherwise.
func (b *baseBalancer) regeneratePicker() {
if b.state == connectivity.TransientFailure {
if b.pickerBuilder != nil {
b.picker = NewErrPicker(balancer.ErrTransientFailure)
} else {
b.v2Picker = NewErrPickerV2(balancer.TransientFailureError(b.mergeErrors()))
}
b.picker = NewErrPicker(b.mergeErrors())
return
}
if b.pickerBuilder != nil {
readySCs := make(map[resolver.Address]balancer.SubConn)
readySCs := make(map[balancer.SubConn]SubConnInfo)
// Filter out all ready SCs from full subConn map.
for addr, sc := range b.subConns {
if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
readySCs[addr] = sc
}
// Filter out all ready SCs from full subConn map.
for _, addr := range b.subConns.Keys() {
sci, _ := b.subConns.Get(addr)
sc := sci.(balancer.SubConn)
if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
readySCs[sc] = SubConnInfo{Address: addr}
}
b.picker = b.pickerBuilder.Build(readySCs)
} else {
readySCs := make(map[balancer.SubConn]SubConnInfo)
// Filter out all ready SCs from full subConn map.
for addr, sc := range b.subConns {
if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
readySCs[sc] = SubConnInfo{Address: addr}
}
}
b.v2Picker = b.v2PickerBuilder.Build(PickerBuildInfo{ReadySCs: readySCs})
}
}
func (b *baseBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
panic("not implemented")
b.picker = b.pickerBuilder.Build(PickerBuildInfo{ReadySCs: readySCs})
}
func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.SubConnState) {
s := state.ConnectivityState
if grpclog.V(2) {
grpclog.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
if logger.V(2) {
logger.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
}
oldS, ok := b.scStates[sc]
if !ok {
if grpclog.V(2) {
grpclog.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
if logger.V(2) {
logger.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
}
return
}
if oldS == connectivity.TransientFailure &&
(s == connectivity.Connecting || s == connectivity.Idle) {
// Once a subconn enters TRANSIENT_FAILURE, ignore subsequent IDLE or
// CONNECTING transitions to prevent the aggregated state from being
// always CONNECTING when many backends exist but are all down.
if s == connectivity.Idle {
sc.Connect()
}
return
}
@ -221,29 +207,22 @@ func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.Su
// When an address was removed by resolver, b called RemoveSubConn but
// kept the sc's state in scStates. Remove state for this sc here.
delete(b.scStates, sc)
case connectivity.TransientFailure:
// Save error to be reported via picker.
b.connErr = state.ConnectionError
}
oldAggrState := b.state
b.state = b.csEvltr.RecordTransition(oldS, s)
// Set or clear the last connection error accordingly.
b.connErr = state.ConnectionError
// Regenerate picker when one of the following happens:
// - this sc became ready from not-ready
// - this sc became not-ready from ready
// - the aggregated state of balancer became TransientFailure from non-TransientFailure
// - the aggregated state of balancer became non-TransientFailure from TransientFailure
// - this sc entered or left ready
// - the aggregated state of balancer is TransientFailure
// (may need to update error message)
if (s == connectivity.Ready) != (oldS == connectivity.Ready) ||
(b.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
b.state == connectivity.TransientFailure {
b.regeneratePicker()
}
if b.picker != nil {
b.cc.UpdateBalancerState(b.state, b.picker)
} else {
b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.v2Picker})
}
b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.picker})
}
// Close is a nop because base balancer doesn't have internal state to clean up,
@ -251,28 +230,25 @@ func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.Su
func (b *baseBalancer) Close() {
}
// NewErrPicker returns a picker that always returns err on Pick().
// ExitIdle is a nop because the base balancer attempts to stay connected to
// all SubConns at all times.
func (b *baseBalancer) ExitIdle() {
}
// NewErrPicker returns a Picker that always returns err on Pick().
func NewErrPicker(err error) balancer.Picker {
return &errPicker{err: err}
}
// NewErrPickerV2 is temporarily defined for backward compatibility reasons.
//
// Deprecated: use NewErrPicker instead.
var NewErrPickerV2 = NewErrPicker
type errPicker struct {
err error // Pick() always returns this err.
}
func (p *errPicker) Pick(context.Context, balancer.PickInfo) (balancer.SubConn, func(balancer.DoneInfo), error) {
return nil, nil, p.err
}
// NewErrPickerV2 returns a V2Picker that always returns err on Pick().
func NewErrPickerV2(err error) balancer.V2Picker {
return &errPickerV2{err: err}
}
type errPickerV2 struct {
err error // Pick() always returns this err.
}
func (p *errPickerV2) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
func (p *errPicker) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
return balancer.PickResult{}, p.err
}

28
vendor/google.golang.org/grpc/balancer/base/base.go generated vendored
View File

@ -37,15 +37,8 @@ import (
// PickerBuilder creates balancer.Picker.
type PickerBuilder interface {
// Build takes a slice of ready SubConns, and returns a picker that will be
// used by gRPC to pick a SubConn.
Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker
}
// V2PickerBuilder creates balancer.V2Picker.
type V2PickerBuilder interface {
// Build returns a picker that will be used by gRPC to pick a SubConn.
Build(info PickerBuildInfo) balancer.V2Picker
Build(info PickerBuildInfo) balancer.Picker
}
// PickerBuildInfo contains information needed by the picker builder to
@ -62,32 +55,17 @@ type SubConnInfo struct {
Address resolver.Address // the address used to create this SubConn
}
// NewBalancerBuilder returns a balancer builder. The balancers
// built by this builder will use the picker builder to build pickers.
func NewBalancerBuilder(name string, pb PickerBuilder) balancer.Builder {
return NewBalancerBuilderWithConfig(name, pb, Config{})
}
// Config contains the config info about the base balancer builder.
type Config struct {
// HealthCheck indicates whether health checking should be enabled for this specific balancer.
HealthCheck bool
}
// NewBalancerBuilderWithConfig returns a base balancer builder configured by the provided config.
func NewBalancerBuilderWithConfig(name string, pb PickerBuilder, config Config) balancer.Builder {
// NewBalancerBuilder returns a base balancer builder configured by the provided config.
func NewBalancerBuilder(name string, pb PickerBuilder, config Config) balancer.Builder {
return &baseBuilder{
name: name,
pickerBuilder: pb,
config: config,
}
}
// NewBalancerBuilderV2 returns a base balancer builder configured by the provided config.
func NewBalancerBuilderV2(name string, pb V2PickerBuilder, config Config) balancer.Builder {
return &baseBuilder{
name: name,
v2PickerBuilder: pb,
config: config,
}
}

51
vendor/google.golang.org/grpc/balancer/grpclb/state/state.go generated vendored Normal file
View File

@ -0,0 +1,51 @@
/*
*
* Copyright 2020 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package state declares grpclb types to be set by resolvers wishing to pass
// information to grpclb via resolver.State Attributes.
package state
import (
"google.golang.org/grpc/resolver"
)
// keyType is the key to use for storing State in Attributes.
type keyType string
const key = keyType("grpc.grpclb.state")
// State contains gRPCLB-relevant data passed from the name resolver.
type State struct {
// BalancerAddresses contains the remote load balancer address(es). If
// set, overrides any resolver-provided addresses with Type of GRPCLB.
BalancerAddresses []resolver.Address
}
// Set returns a copy of the provided state with attributes containing s. s's
// data should not be mutated after calling Set.
func Set(state resolver.State, s *State) resolver.State {
state.Attributes = state.Attributes.WithValue(key, s)
return state
}
// Get returns the grpclb State in the resolver.State, or nil if not present.
// The returned data should not be mutated.
func Get(state resolver.State) *State {
s, _ := state.Attributes.Value(key).(*State)
return s
}

12
vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go generated vendored
View File

@ -33,9 +33,11 @@ import (
// Name is the name of round_robin balancer.
const Name = "round_robin"
var logger = grpclog.Component("roundrobin")
// newBuilder creates a new roundrobin balancer builder.
func newBuilder() balancer.Builder {
return base.NewBalancerBuilderV2(Name, &rrPickerBuilder{}, base.Config{HealthCheck: true})
return base.NewBalancerBuilder(Name, &rrPickerBuilder{}, base.Config{HealthCheck: true})
}
func init() {
@ -44,12 +46,12 @@ func init() {
type rrPickerBuilder struct{}
func (*rrPickerBuilder) Build(info base.PickerBuildInfo) balancer.V2Picker {
grpclog.Infof("roundrobinPicker: newPicker called with info: %v", info)
func (*rrPickerBuilder) Build(info base.PickerBuildInfo) balancer.Picker {
logger.Infof("roundrobinPicker: Build called with info: %v", info)
if len(info.ReadySCs) == 0 {
return base.NewErrPickerV2(balancer.ErrNoSubConnAvailable)
return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
}
var scs []balancer.SubConn
scs := make([]balancer.SubConn, 0, len(info.ReadySCs))
for sc := range info.ReadySCs {
scs = append(scs, sc)
}