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package cnmallocator
import (
"context"
"fmt"
"net/netip"
"strconv"
"strings"
"github.com/containerd/log"
"github.com/docker/docker/libnetwork/ipamapi"
"github.com/docker/docker/libnetwork/ipams"
"github.com/docker/docker/libnetwork/ipamutils"
"github.com/moby/swarmkit/v2/manager/allocator/networkallocator"
)
func initIPAMDrivers(r ipamapi.Registerer, netConfig *networkallocator.Config) error {
var addressPool []*ipamutils.NetworkToSplit
var str strings.Builder
str.WriteString("Subnetlist - ")
// Extract defaultAddrPool param info and construct ipamutils.NetworkToSplit
// from the info. We will be using it to call Libnetwork API
// We also need to log new address pool info whenever swarm init
// happens with default address pool option
if netConfig != nil {
for _, p := range netConfig.DefaultAddrPool {
base, err := netip.ParsePrefix(p)
if err != nil {
return fmt.Errorf("invalid prefix %q: %w", p, err)
}
addressPool = append(addressPool, &ipamutils.NetworkToSplit{
Base: base,
Size: int(netConfig.SubnetSize),
})
str.WriteString(p + ",")
}
str.WriteString(": Size ")
str.WriteString(strconv.Itoa(int(netConfig.SubnetSize)))
}
if len(addressPool) > 0 {
log.G(context.TODO()).Info("Swarm initialized global default address pool to: " + str.String())
}
if err := ipams.Register(r, nil, nil, addressPool); err != nil {
return err
}
return nil
}
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