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|
package network
import (
"fmt"
"net"
"github.com/containers/common/libnetwork/types"
"github.com/containers/common/libnetwork/util"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v4/cmd/podman/common"
"github.com/containers/podman/v4/cmd/podman/parse"
"github.com/containers/podman/v4/cmd/podman/registry"
"github.com/containers/podman/v4/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
networkCreateDescription = `create CNI networks for containers and pods`
networkCreateCommand = &cobra.Command{
Use: "create [options] [NAME]",
Short: "network create",
Long: networkCreateDescription,
RunE: networkCreate,
Args: cobra.MaximumNArgs(1),
ValidArgsFunction: completion.AutocompleteNone,
Example: `podman network create podman1`,
}
)
var (
networkCreateOptions entities.NetworkCreateOptions
labels []string
opts []string
)
func networkCreateFlags(cmd *cobra.Command) {
flags := cmd.Flags()
driverFlagName := "driver"
flags.StringVarP(&networkCreateOptions.Driver, driverFlagName, "d", types.DefaultNetworkDriver, "driver to manage the network")
_ = cmd.RegisterFlagCompletionFunc(driverFlagName, common.AutocompleteNetworkDriver)
optFlagName := "opt"
flags.StringArrayVarP(&opts, optFlagName, "o", nil, "Set driver specific options (default [])")
_ = cmd.RegisterFlagCompletionFunc(optFlagName, completion.AutocompleteNone)
gatewayFlagName := "gateway"
flags.IPSliceVar(&networkCreateOptions.Gateways, gatewayFlagName, nil, "IPv4 or IPv6 gateway for the subnet")
_ = cmd.RegisterFlagCompletionFunc(gatewayFlagName, completion.AutocompleteNone)
flags.BoolVar(&networkCreateOptions.Internal, "internal", false, "restrict external access from this network")
ipRangeFlagName := "ip-range"
flags.StringArrayVar(&networkCreateOptions.Ranges, ipRangeFlagName, nil, "allocate container IP from range")
_ = cmd.RegisterFlagCompletionFunc(ipRangeFlagName, completion.AutocompleteNone)
// TODO consider removing this for 4.0
macvlanFlagName := "macvlan"
flags.StringVar(&networkCreateOptions.MacVLAN, macvlanFlagName, "", "create a Macvlan connection based on this device")
// This option is deprecated
_ = flags.MarkHidden(macvlanFlagName)
labelFlagName := "label"
flags.StringArrayVar(&labels, labelFlagName, nil, "set metadata on a network")
_ = cmd.RegisterFlagCompletionFunc(labelFlagName, completion.AutocompleteNone)
// TODO not supported yet
// flags.StringVar(&networkCreateOptions.IPamDriver, "ipam-driver", "", "IP Address Management Driver")
flags.BoolVar(&networkCreateOptions.IPv6, "ipv6", false, "enable IPv6 networking")
subnetFlagName := "subnet"
flags.StringArrayVar(&networkCreateOptions.Subnets, subnetFlagName, nil, "subnets in CIDR format")
_ = cmd.RegisterFlagCompletionFunc(subnetFlagName, completion.AutocompleteNone)
flags.BoolVar(&networkCreateOptions.DisableDNS, "disable-dns", false, "disable dns plugin")
}
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: networkCreateCommand,
Parent: networkCmd,
})
networkCreateFlags(networkCreateCommand)
}
func networkCreate(cmd *cobra.Command, args []string) error {
var (
name string
)
if len(args) > 0 {
name = args[0]
}
var err error
networkCreateOptions.Labels, err = parse.GetAllLabels([]string{}, labels)
if err != nil {
return errors.Wrap(err, "failed to parse labels")
}
networkCreateOptions.Options, err = parse.GetAllLabels([]string{}, opts)
if err != nil {
return errors.Wrapf(err, "unable to parse options")
}
network := types.Network{
Name: name,
Driver: networkCreateOptions.Driver,
Options: networkCreateOptions.Options,
Labels: networkCreateOptions.Labels,
IPv6Enabled: networkCreateOptions.IPv6,
DNSEnabled: !networkCreateOptions.DisableDNS,
Internal: networkCreateOptions.Internal,
}
// old --macvlan option
if networkCreateOptions.MacVLAN != "" {
logrus.Warn("The --macvlan option is deprecated, use `--driver macvlan --opt parent=<device>` instead")
network.Driver = types.MacVLANNetworkDriver
network.NetworkInterface = networkCreateOptions.MacVLAN
} else if networkCreateOptions.Driver == types.MacVLANNetworkDriver {
// new -d macvlan --opt parent=... syntax
if parent, ok := network.Options["parent"]; ok {
network.NetworkInterface = parent
delete(network.Options, "parent")
}
}
if len(networkCreateOptions.Subnets) > 0 {
if len(networkCreateOptions.Gateways) > len(networkCreateOptions.Subnets) {
return errors.New("cannot set more gateways than subnets")
}
if len(networkCreateOptions.Ranges) > len(networkCreateOptions.Subnets) {
return errors.New("cannot set more ranges than subnets")
}
for i := range networkCreateOptions.Subnets {
subnet, err := types.ParseCIDR(networkCreateOptions.Subnets[i])
if err != nil {
return err
}
s := types.Subnet{
Subnet: subnet,
}
if len(networkCreateOptions.Ranges) > i {
leaseRange, err := parseRange(networkCreateOptions.Ranges[i])
if err != nil {
return err
}
s.LeaseRange = leaseRange
}
if len(networkCreateOptions.Gateways) > i {
s.Gateway = networkCreateOptions.Gateways[i]
}
network.Subnets = append(network.Subnets, s)
}
} else if len(networkCreateOptions.Ranges) > 0 || len(networkCreateOptions.Gateways) > 0 {
return errors.New("cannot set gateway or range without subnet")
}
response, err := registry.ContainerEngine().NetworkCreate(registry.Context(), network)
if err != nil {
return err
}
fmt.Println(response.Name)
return nil
}
func parseRange(iprange string) (*types.LeaseRange, error) {
_, subnet, err := net.ParseCIDR(iprange)
if err != nil {
return nil, err
}
startIP, err := util.FirstIPInSubnet(subnet)
if err != nil {
return nil, errors.Wrap(err, "failed to get first ip in range")
}
lastIP, err := util.LastIPInSubnet(subnet)
if err != nil {
return nil, errors.Wrap(err, "failed to get last ip in range")
}
return &types.LeaseRange{
StartIP: startIP,
EndIP: lastIP,
}, nil
}
|
