// getNextBootstrapAddress returns the next available bootstrap
// address by consulting the first non-exhausted resolver from the
// slice supplied to the constructor or set using setBootstrap().
// The lock is assumed held.
func (g *Gossip) getNextBootstrapAddress() net.Addr {
if len(g.resolvers) == 0 {
log.Fatalf("no resolvers specified for gossip network")
}
// Run through resolvers round robin starting at last resolved index.
for i := 0; i < len(g.resolvers); i++ {
g.resolverIdx = (g.resolverIdx + 1) % len(g.resolvers)
if g.resolverIdx == len(g.resolvers)-1 {
g.triedAll = true
}
resolver := g.resolvers[g.resolverIdx]
addr, err := resolver.GetAddress()
if err != nil {
log.Errorf("invalid bootstrap address: %+v, %v", resolver, err)
continue
} else if addr.String() == g.is.NodeAddr.String() {
// Skip our own node address.
continue
}
_, addrActive := g.bootstrapping[addr.String()]
if !resolver.IsExhausted() || !addrActive {
g.bootstrapping[addr.String()] = struct{}{}
return addr
}
}
return nil
}
// getNextBootstrapAddress returns the next available bootstrap
// address by consulting the first non-exhausted resolver from the
// slice supplied to the constructor or set using setBootstrap().
// The lock is assumed held.
func (g *Gossip) getNextBootstrapAddress() net.Addr {
needBSCleanup := false
defer func() {
g.needBSCleanup = needBSCleanup
}()
// Run through resolvers round robin starting at last resolved index.
for i := 0; i < len(g.resolvers); i++ {
g.resolverIdx++
g.resolverIdx %= len(g.resolvers)
g.resolversTried[g.resolverIdx] = struct{}{}
resolver := g.resolvers[g.resolverIdx]
if addr, err := resolver.GetAddress(); err != nil {
// Resolver has an invalid address. Set needBSCleanup to purge invalid
// bootstrap addresses once gossip cluster is joined successfully.
needBSCleanup = true
if !g.needBSCleanup {
log.Warningf(context.TODO(), "invalid bootstrap address: %+v, %v", resolver, err)
}
continue
} else {
addrStr := addr.String()
if _, addrActive := g.bootstrapping[addrStr]; !addrActive {
g.bootstrapping[addrStr] = struct{}{}
return addr
}
}
}
return nil
}
// getNextBootstrapAddress returns the next available bootstrap
// address by consulting the first non-exhausted resolver from the
// slice supplied to the constructor or set using setBootstrap().
// The lock is assumed held.
func (g *Gossip) getNextBootstrapAddress() net.Addr {
// Run through resolvers round robin starting at last resolved index.
for i := 0; i < len(g.resolvers); i++ {
g.resolverIdx++
g.resolverIdx %= len(g.resolvers)
g.resolversTried[g.resolverIdx] = struct{}{}
resolver := g.resolvers[g.resolverIdx]
if addr, err := resolver.GetAddress(); err != nil {
log.Errorf("invalid bootstrap address: %+v, %v", resolver, err)
continue
} else {
addrStr := addr.String()
if _, addrActive := g.bootstrapping[addrStr]; !addrActive {
g.bootstrapping[addrStr] = struct{}{}
return addr
}
}
}
return nil
}