summaryrefslogtreecommitdiff
path: root/cmd/podman/port.go
blob: 5753c8e56cb98b48d714ff392dde1d4cdbf790ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
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.DeferredShutdown(false)

	containers, err := runtime.Port(c)
	if err != nil {
		return err
	}
	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
}