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|
package main
import (
"fmt"
"strconv"
"strings"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
var (
portFlags = []cli.Flag{
cli.BoolFlag{
Name: "all, a",
Usage: "display port information for all containers",
},
LatestFlag,
}
portDescription = `
podman port
List port mappings for the CONTAINER, or lookup the public-facing port that is NAT-ed to the PRIVATE_PORT
`
portCommand = cli.Command{
Name: "port",
Usage: "List port mappings or a specific mapping for the container",
Description: portDescription,
Flags: sortFlags(portFlags),
Action: portCmd,
ArgsUsage: "CONTAINER-NAME [mapping]",
OnUsageError: usageErrorHandler,
}
)
func portCmd(c *cli.Context) error {
var (
userProto, containerName string
userPort int
container *libpod.Container
containers []*libpod.Container
)
args := c.Args()
if err := validateFlags(c, portFlags); err != nil {
return err
}
if c.Bool("latest") && c.Bool("all") {
return errors.Errorf("the 'all' and 'latest' options cannot be used together")
}
if c.Bool("all") && len(args) > 0 {
return errors.Errorf("no additional arguments can be used with 'all'")
}
if len(args) == 0 && !c.Bool("latest") && !c.Bool("all") {
return errors.Errorf("you must supply a running container name or id")
}
if !c.Bool("latest") && !c.Bool("all") {
containerName = args[0]
}
port := ""
if len(args) > 1 && !c.Bool("latest") {
port = args[1]
}
if len(args) == 1 && c.Bool("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 := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
if !c.Bool("latest") && !c.Bool("all") {
container, err = runtime.LookupContainer(containerName)
if err != nil {
return errors.Wrapf(err, "unable to find container %s", containerName)
}
containers = append(containers, container)
} else if c.Bool("latest") {
container, err = runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to get last created container")
}
containers = append(containers, container)
} else {
containers, err = runtime.GetRunningContainers()
if err != nil {
return errors.Wrapf(err, "unable to get all containers")
}
}
for _, con := range containers {
if state, _ := con.State(); state != libpod.ContainerStateRunning {
continue
}
if c.Bool("all") {
fmt.Println(con.ID())
}
// Iterate mappings
for _, v := range con.Config().PortMappings {
hostIP := v.HostIP
// Set host IP to 0.0.0.0 if blank
if hostIP == "" {
hostIP = "0.0.0.0"
}
// 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
}
|
