104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
package router
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"net"
|
|
"strings"
|
|
|
|
"github.com/hashicorp/consul/agent/metadata"
|
|
"github.com/hashicorp/serf/serf"
|
|
)
|
|
|
|
// FloodAddrFn gets the address to use for a given server when flood-joining. This
|
|
// will return false if it doesn't have one.
|
|
type FloodAddrFn func(*metadata.Server) (string, bool)
|
|
|
|
// FloodPortFn gets the port to use for a given server when flood-joining. This
|
|
// will return false if it doesn't have one.
|
|
type FloodPortFn func(*metadata.Server) (int, bool)
|
|
|
|
// FloodJoins attempts to make sure all Consul servers in the local Serf
|
|
// instance are joined in the global Serf instance. It assumes names in the
|
|
// local area are of the form <node> and those in the global area are of the
|
|
// form <node>.<dc> as is done for WAN and general network areas in Consul
|
|
// Enterprise.
|
|
func FloodJoins(logger *log.Logger, addrFn FloodAddrFn, portFn FloodPortFn,
|
|
localDatacenter string, localSerf *serf.Serf, globalSerf *serf.Serf) {
|
|
|
|
// Names in the global Serf have the datacenter suffixed.
|
|
suffix := fmt.Sprintf(".%s", localDatacenter)
|
|
|
|
// Index the global side so we can do one pass through the local side
|
|
// with cheap lookups.
|
|
index := make(map[string]*metadata.Server)
|
|
for _, m := range globalSerf.Members() {
|
|
ok, server := metadata.IsConsulServer(m)
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
if server.Datacenter != localDatacenter {
|
|
continue
|
|
}
|
|
|
|
localName := strings.TrimSuffix(server.Name, suffix)
|
|
index[localName] = server
|
|
}
|
|
|
|
// Now run through the local side and look for joins.
|
|
for _, m := range localSerf.Members() {
|
|
if m.Status != serf.StatusAlive {
|
|
continue
|
|
}
|
|
|
|
ok, server := metadata.IsConsulServer(m)
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
if _, ok := index[server.Name]; ok {
|
|
continue
|
|
}
|
|
|
|
// We can't use the port number from the local Serf, so we just
|
|
// get the host part.
|
|
addr, _, err := net.SplitHostPort(server.Addr.String())
|
|
if err != nil {
|
|
logger.Printf("[DEBUG] consul: Failed to flood-join %q (bad address %q): %v",
|
|
server.Name, server.Addr.String(), err)
|
|
}
|
|
if addrFn != nil {
|
|
if a, ok := addrFn(server); ok {
|
|
addr = a
|
|
}
|
|
}
|
|
|
|
// Let the callback see if it can get the port number, otherwise
|
|
// leave it blank to behave as if we just supplied an address.
|
|
if port, ok := portFn(server); ok {
|
|
addr = net.JoinHostPort(addr, fmt.Sprintf("%d", port))
|
|
} else {
|
|
// If we have an IPv6 address, we should add brackets,
|
|
// single globalSerf.Join expects that.
|
|
if ip := net.ParseIP(addr); ip != nil {
|
|
if ip.To4() == nil {
|
|
addr = fmt.Sprintf("[%s]", addr)
|
|
}
|
|
} else {
|
|
logger.Printf("[DEBUG] consul: Failed to parse IP %s", addr)
|
|
}
|
|
}
|
|
|
|
// Do the join!
|
|
n, err := globalSerf.Join([]string{addr}, true)
|
|
if err != nil {
|
|
logger.Printf("[DEBUG] consul: Failed to flood-join %q at %s: %v",
|
|
server.Name, addr, err)
|
|
} else if n > 0 {
|
|
logger.Printf("[DEBUG] consul: Successfully performed flood-join for %q at %s",
|
|
server.Name, addr)
|
|
}
|
|
}
|
|
}
|