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package endpoints
import (
"fmt"
"net"
"time"
"github.com/lxc/incus/v6/internal/ports"
"github.com/lxc/incus/v6/internal/server/endpoints/listeners"
internalUtil "github.com/lxc/incus/v6/internal/util"
"github.com/lxc/incus/v6/shared/logger"
)
// ClusterAddress returns the cluster address of the cluster endpoint, or an
// empty string if there's no cluster endpoint or the cluster endpoint is provided by the network listener.
func (e *Endpoints) clusterAddress() string {
e.mu.RLock()
defer e.mu.RUnlock()
listener := e.listeners[cluster]
if listener == nil {
return ""
}
return listener.Addr().String()
}
// ClusterUpdateAddress updates the address for the cluster endpoint, shutting
// it down and restarting it.
func (e *Endpoints) ClusterUpdateAddress(address string) error {
networkAddress := e.NetworkAddress()
if address != "" {
address = internalUtil.CanonicalNetworkAddress(address, ports.HTTPSDefaultPort)
}
oldAddress := e.clusterAddress()
if address == oldAddress {
return nil
}
logger.Infof("Update cluster address")
e.mu.Lock()
defer e.mu.Unlock()
// Close the previous socket
_ = e.closeListener(cluster)
// If turning off listening, we're done
if address == "" {
return nil
}
// If networkAddress is set and address is covered, we don't need a new listener.
if networkAddress != "" && internalUtil.IsAddressCovered(address, networkAddress) {
return nil
}
// Attempt to setup the new listening socket
getListener := func(address string) (*net.Listener, error) {
var err error
var listener net.Listener
for range 10 { // Ten retries over a second seems reasonable.
listener, err = net.Listen("tcp", address)
if err == nil {
break
}
time.Sleep(100 * time.Millisecond)
}
if err != nil {
return nil, fmt.Errorf("Cannot listen on cluster HTTPS socket %q: %w", address, err)
}
return &listener, nil
}
// set up the listener
listener, err := getListener(address)
if err != nil {
// Attempt to revert to the previous address
listener, err1 := getListener(oldAddress)
if err1 == nil {
e.listeners[cluster] = listeners.NewFancyTLSListener(*listener, e.cert)
e.serve(cluster)
}
return err
}
e.listeners[cluster] = listeners.NewFancyTLSListener(*listener, e.cert)
e.serve(cluster)
return nil
}
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