diff options
Diffstat (limited to 'vendor/google.golang.org/grpc/clientconn.go')
| -rw-r--r-- | vendor/google.golang.org/grpc/clientconn.go | 47 |
1 files changed, 36 insertions, 11 deletions
diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go index 4f57b5543..a319ef979 100644 --- a/vendor/google.golang.org/grpc/clientconn.go +++ b/vendor/google.golang.org/grpc/clientconn.go @@ -118,12 +118,26 @@ func (dcs *defaultConfigSelector) SelectConfig(rpcInfo iresolver.RPCInfo) (*ires // NewClient creates a new gRPC "channel" for the target URI provided. No I/O // is performed. Use of the ClientConn for RPCs will automatically cause it to -// connect. Connect may be used to manually create a connection, but for most -// users this is unnecessary. +// connect. The Connect method may be called to manually create a connection, +// but for most users this should be unnecessary. // // The target name syntax is defined in -// https://github.com/grpc/grpc/blob/master/doc/naming.md. e.g. to use dns -// resolver, a "dns:///" prefix should be applied to the target. +// https://github.com/grpc/grpc/blob/master/doc/naming.md. E.g. to use the dns +// name resolver, a "dns:///" prefix may be applied to the target. The default +// name resolver will be used if no scheme is detected, or if the parsed scheme +// is not a registered name resolver. The default resolver is "dns" but can be +// overridden using the resolver package's SetDefaultScheme. +// +// Examples: +// +// - "foo.googleapis.com:8080" +// - "dns:///foo.googleapis.com:8080" +// - "dns:///foo.googleapis.com" +// - "dns:///10.0.0.213:8080" +// - "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443" +// - "dns://8.8.8.8/foo.googleapis.com:8080" +// - "dns://8.8.8.8/foo.googleapis.com" +// - "zookeeper://zk.example.com:9900/example_service" // // The DialOptions returned by WithBlock, WithTimeout, // WithReturnConnectionError, and FailOnNonTempDialError are ignored by this @@ -181,7 +195,7 @@ func NewClient(target string, opts ...DialOption) (conn *ClientConn, err error) } cc.dopts.defaultServiceConfig, _ = scpr.Config.(*ServiceConfig) } - cc.mkp = cc.dopts.copts.KeepaliveParams + cc.keepaliveParams = cc.dopts.copts.KeepaliveParams if err = cc.initAuthority(); err != nil { return nil, err @@ -225,7 +239,12 @@ func Dial(target string, opts ...DialOption) (*ClientConn, error) { func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) { // At the end of this method, we kick the channel out of idle, rather than // waiting for the first rpc. - opts = append([]DialOption{withDefaultScheme("passthrough")}, opts...) + // + // WithLocalDNSResolution dial option in `grpc.Dial` ensures that it + // preserves behavior: when default scheme passthrough is used, skip + // hostname resolution, when "dns" is used for resolution, perform + // resolution on the client. + opts = append([]DialOption{withDefaultScheme("passthrough"), WithLocalDNSResolution()}, opts...) cc, err := NewClient(target, opts...) if err != nil { return nil, err @@ -618,7 +637,7 @@ type ClientConn struct { balancerWrapper *ccBalancerWrapper // Always recreated whenever entering idle to simplify Close. sc *ServiceConfig // Latest service config received from the resolver. conns map[*addrConn]struct{} // Set to nil on close. - mkp keepalive.ClientParameters // May be updated upon receipt of a GoAway. + keepaliveParams keepalive.ClientParameters // May be updated upon receipt of a GoAway. // firstResolveEvent is used to track whether the name resolver sent us at // least one update. RPCs block on this event. May be accessed without mu // if we know we cannot be asked to enter idle mode while accessing it (e.g. @@ -867,7 +886,13 @@ func (cc *ClientConn) Target() string { return cc.target } -// CanonicalTarget returns the canonical target string of the ClientConn. +// CanonicalTarget returns the canonical target string used when creating cc. +// +// This always has the form "<scheme>://[authority]/<endpoint>". For example: +// +// - "dns:///example.com:42" +// - "dns://8.8.8.8/example.com:42" +// - "unix:///path/to/socket" func (cc *ClientConn) CanonicalTarget() string { return cc.parsedTarget.String() } @@ -1210,8 +1235,8 @@ func (ac *addrConn) adjustParams(r transport.GoAwayReason) { case transport.GoAwayTooManyPings: v := 2 * ac.dopts.copts.KeepaliveParams.Time ac.cc.mu.Lock() - if v > ac.cc.mkp.Time { - ac.cc.mkp.Time = v + if v > ac.cc.keepaliveParams.Time { + ac.cc.keepaliveParams.Time = v } ac.cc.mu.Unlock() } @@ -1307,7 +1332,7 @@ func (ac *addrConn) tryAllAddrs(ctx context.Context, addrs []resolver.Address, c ac.mu.Lock() ac.cc.mu.RLock() - ac.dopts.copts.KeepaliveParams = ac.cc.mkp + ac.dopts.copts.KeepaliveParams = ac.cc.keepaliveParams ac.cc.mu.RUnlock() copts := ac.dopts.copts |