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|
package main
import (
"fmt"
"strconv"
"strings"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/pkg/adapter"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
portCommand cliconfig.PortValues
portDescription = `List port mappings for the CONTAINER, or lookup the public-facing port that is NAT-ed to the PRIVATE_PORT
`
_portCommand = &cobra.Command{
Use: "port [flags] CONTAINER",
Short: "List port mappings or a specific mapping for the container",
Long: portDescription,
RunE: func(cmd *cobra.Command, args []string) error {
portCommand.InputArgs = args
portCommand.GlobalFlags = MainGlobalOpts
portCommand.Remote = remoteclient
return portCmd(&portCommand)
},
Args: func(cmd *cobra.Command, args []string) error {
return checkAllAndLatest(cmd, args, true)
},
Example: `podman port --all
podman port ctrID 80/tcp
podman port --latest 80`,
}
)
func init() {
portCommand.Command = _portCommand
portCommand.SetHelpTemplate(HelpTemplate())
portCommand.SetUsageTemplate(UsageTemplate())
flags := portCommand.Flags()
flags.BoolVarP(&portCommand.All, "all", "a", false, "Display port information for all containers")
flags.BoolVarP(&portCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
markFlagHiddenForRemoteClient("latest", flags)
}
func portCmd(c *cliconfig.PortValues) error {
var (
userProto, containerName string
userPort int
)
args := c.InputArgs
if c.Latest && c.All {
return errors.Errorf("the 'all' and 'latest' options cannot be used together")
}
if c.All && len(args) > 0 {
return errors.Errorf("no additional arguments can be used with 'all'")
}
if len(args) == 0 && !c.Latest && !c.All {
return errors.Errorf("you must supply a running container name or id")
}
port := ""
if len(args) > 1 && !c.Latest {
port = args[1]
}
if len(args) == 1 && c.Latest {
port = args[0]
}
if port != "" {
fields := strings.Split(port, "/")
// User supplied at least port
var err error
// User supplied port and protocol
if len(fields) == 2 {
userProto = fields[1]
}
if len(fields) >= 1 {
p := fields[0]
userPort, err = strconv.Atoi(p)
if err != nil {
return errors.Wrapf(err, "unable to format port")
}
}
// Format is incorrect
if len(fields) > 2 || len(fields) < 1 {
return errors.Errorf("port formats are port/protocol. '%s' is invalid", port)
}
}
runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
containers, err := runtime.Port(c)
for _, con := range containers {
portmappings, err := con.PortMappings()
if err != nil {
return err
}
// Iterate mappings
for _, v := range portmappings {
hostIP := v.HostIP
// Set host IP to 0.0.0.0 if blank
if hostIP == "" {
hostIP = "0.0.0.0"
}
if c.All {
fmt.Printf("%s\t", con.ID()[:12])
}
// If not searching by port or port/proto, then dump what we see
if port == "" {
fmt.Printf("%d/%s -> %s:%d\n", v.ContainerPort, v.Protocol, hostIP, v.HostPort)
continue
}
// We have a match on ports
if v.ContainerPort == int32(userPort) {
if userProto == "" || userProto == v.Protocol {
fmt.Printf("%s:%d\n", hostIP, v.HostPort)
break
}
} else {
return errors.Errorf("No public port '%d' published for %s", userPort, containerName)
}
}
}
return nil
}
|
