[chore] update otel libraries (#3740)

* chore: update otel dependencies

* refactor: combine tracing & metrics in observability package

* chore: update example tracing compose file

vendor/google.golang.org/grpc/internal/resolver/dns/dns_resolver.go

@@ -24,8 +24,9 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"math/rand"
+	rand "math/rand/v2"
 	"net"
+	"net/netip"
 	"os"
 	"strconv"
 	"strings"
@@ -122,7 +123,7 @@ func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts
 	}
 
 	// IP address.
-	if ipAddr, ok := formatIP(host); ok {
+	if ipAddr, err := formatIP(host); err == nil {
 		addr := []resolver.Address{{Addr: ipAddr + ":" + port}}
 		cc.UpdateState(resolver.State{Addresses: addr})
 		return deadResolver{}, nil
@@ -177,7 +178,7 @@ type dnsResolver struct {
 	// finished. Otherwise, data race will be possible. [Race Example] in
 	// dns_resolver_test we replace the real lookup functions with mocked ones to
 	// facilitate testing. If Close() doesn't wait for watcher() goroutine
-	// finishes, race detector sometimes will warns lookup (READ the lookup
+	// finishes, race detector sometimes will warn lookup (READ the lookup
 	// function pointers) inside watcher() goroutine has data race with
 	// replaceNetFunc (WRITE the lookup function pointers).
 	wg                   sync.WaitGroup
@@ -237,7 +238,9 @@ func (d *dnsResolver) watcher() {
 }
 
 func (d *dnsResolver) lookupSRV(ctx context.Context) ([]resolver.Address, error) {
-	if !EnableSRVLookups {
+	// Skip this particular host to avoid timeouts with some versions of
+	// systemd-resolved.
+	if !EnableSRVLookups || d.host == "metadata.google.internal." {
 		return nil, nil
 	}
 	var newAddrs []resolver.Address
@@ -258,9 +261,9 @@ func (d *dnsResolver) lookupSRV(ctx context.Context) ([]resolver.Address, error)
 			return nil, err
 		}
 		for _, a := range lbAddrs {
-			ip, ok := formatIP(a)
-			if !ok {
-				return nil, fmt.Errorf("dns: error parsing A record IP address %v", a)
+			ip, err := formatIP(a)
+			if err != nil {
+				return nil, fmt.Errorf("dns: error parsing A record IP address %v: %v", a, err)
 			}
 			addr := ip + ":" + strconv.Itoa(int(s.Port))
 			newAddrs = append(newAddrs, resolver.Address{Addr: addr, ServerName: s.Target})
@@ -320,9 +323,9 @@ func (d *dnsResolver) lookupHost(ctx context.Context) ([]resolver.Address, error
 	}
 	newAddrs := make([]resolver.Address, 0, len(addrs))
 	for _, a := range addrs {
-		ip, ok := formatIP(a)
-		if !ok {
-			return nil, fmt.Errorf("dns: error parsing A record IP address %v", a)
+		ip, err := formatIP(a)
+		if err != nil {
+			return nil, fmt.Errorf("dns: error parsing A record IP address %v: %v", a, err)
 		}
 		addr := ip + ":" + d.port
 		newAddrs = append(newAddrs, resolver.Address{Addr: addr})
@@ -349,19 +352,19 @@ func (d *dnsResolver) lookup() (*resolver.State, error) {
 	return &state, nil
 }
 
-// formatIP returns ok = false if addr is not a valid textual representation of
-// an IP address. If addr is an IPv4 address, return the addr and ok = true.
+// formatIP returns an error if addr is not a valid textual representation of
+// an IP address. If addr is an IPv4 address, return the addr and error = nil.
 // If addr is an IPv6 address, return the addr enclosed in square brackets and
-// ok = true.
-func formatIP(addr string) (addrIP string, ok bool) {
-	ip := net.ParseIP(addr)
-	if ip == nil {
-		return "", false
+// error = nil.
+func formatIP(addr string) (string, error) {
+	ip, err := netip.ParseAddr(addr)
+	if err != nil {
+		return "", err
 	}
-	if ip.To4() != nil {
-		return addr, true
+	if ip.Is4() {
+		return addr, nil
 	}
-	return "[" + addr + "]", true
+	return "[" + addr + "]", nil
 }
 
 // parseTarget takes the user input target string and default port, returns
@@ -377,7 +380,7 @@ func parseTarget(target, defaultPort string) (host, port string, err error) {
 	if target == "" {
 		return "", "", internal.ErrMissingAddr
 	}
-	if ip := net.ParseIP(target); ip != nil {
+	if _, err := netip.ParseAddr(target); err == nil {
 		// target is an IPv4 or IPv6(without brackets) address
 		return target, defaultPort, nil
 	}
@@ -425,7 +428,7 @@ func chosenByPercentage(a *int) bool {
 	if a == nil {
 		return true
 	}
-	return rand.Intn(100)+1 <= *a
+	return rand.IntN(100)+1 <= *a
 }
 
 func canaryingSC(js string) string {

vendor/google.golang.org/grpc/internal/resolver/passthrough/passthrough.go

@@ -55,7 +55,7 @@ func (r *passthroughResolver) start() {
 	r.cc.UpdateState(resolver.State{Addresses: []resolver.Address{{Addr: r.target.Endpoint()}}})
 }
 
-func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOptions) {}
+func (*passthroughResolver) ResolveNow(resolver.ResolveNowOptions) {}
 
 func (*passthroughResolver) Close() {}