Expose ports from image

When an image has a port to expose, we need to expose it.  User's input overrides the
image's port information.

Also, enable port information in ps so we can see which random port is assigned.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #249
Approved by: rhatdan

2 files changed, 27 insertions, 11 deletions

diff --git a/cmd/podman/create.go b/cmd/podman/create.go
index 28bd0a60e..80cb7f432 100644
--- a/cmd/podman/create.go
+++ b/cmd/podman/create.go
@@ -299,15 +299,26 @@ func isPortInPortBindings(pb map[nat.Port][]nat.PortBinding, port nat.Port) bool
 }
 
 func exposedPorts(c *cli.Context, imageExposedPorts map[string]struct{}) (map[nat.Port]struct{}, map[nat.Port][]nat.PortBinding, error) {
-	// TODO Handle exposed ports from image
-	// Currently ignoring imageExposedPorts
+	var exposedPorts []string
 	var ports map[nat.Port]struct{}
 	ports = make(map[nat.Port]struct{})
 	_, portBindings, err := nat.ParsePortSpecs(c.StringSlice("publish"))
 	if err != nil {
 		return nil, nil, err
 	}
-	for _, e := range c.StringSlice("expose") {
+
+	// Parse the ports from the image itself
+	for i := range imageExposedPorts {
+		fields := strings.Split(i, "/")
+		if len(fields) > 2 {
+			return nil, nil, errors.Errorf("invalid exposed port format in image")
+		}
+		exposedPorts = append(exposedPorts, fields[0])
+	}
+
+	// Add the ports from the image to the ports from the user
+	exposedPorts = append(exposedPorts, c.StringSlice("expose")...)
+	for _, e := range exposedPorts {
 		// Merge in exposed ports to the map of published ports
 		if strings.Contains(e, ":") {
 			return nil, nil, fmt.Errorf("invalid port format for --expose: %s", e)
diff --git a/cmd/podman/ps.go b/cmd/podman/ps.go
index 944664c68..d68abeb53 100644
--- a/cmd/podman/ps.go
+++ b/cmd/podman/ps.go
@@ -10,6 +10,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/cri-o/ocicni/pkg/ocicni"
 	"github.com/docker/go-units"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
@@ -400,7 +401,7 @@ func getTemplateOutput(containers []*libpod.Container, opts psOptions) ([]psTemp
 		//command := getStrFromSquareBrackets(ctr.ImageCreatedBy)
 		command := strings.Join(ctr.Spec().Process.Args, " ")
 		//mounts := getMounts(ctr.Mounts, opts.noTrunc)
-		//ports := getPorts(ctr.Config.ExposedPorts)
+		ports := getPorts(ctr.Config().PortMappings)
 		//size := units.HumanSize(float64(ctr.SizeRootFs))
 		labels := formatLabels(ctr.Labels())
 		ns := getNamespaces(pid)
@@ -433,7 +434,7 @@ func getTemplateOutput(containers []*libpod.Container, opts psOptions) ([]psTemp
 			CreatedAt:  createdAt,
 			RunningFor: runningFor,
 			Status:     status,
-			//Ports:      ports,
+			Ports:      ports,
 			//Size:       size,
 			Names:  ctr.Name(),
 			Labels: labels,
@@ -592,15 +593,19 @@ func getMounts(mounts []specs.Mount, noTrunc bool) string {
 	}
 	return strings.Join(arr, ",")
 }
+*/
 // getPorts converts the ports used to a string of the from "port1, port2"
-func getPorts(ports map[string]struct{}) string {
-	var arr []string
+func getPorts(ports []ocicni.PortMapping) string {
+	var portDisplay []string
 	if len(ports) == 0 {
 		return ""
 	}
-	for key := range ports {
-		arr = append(arr, key)
+	for _, v := range ports {
+		hostIP := v.HostIP
+		if hostIP == "" {
+			hostIP = "0.0.0.0"
+		}
+		portDisplay = append(portDisplay, fmt.Sprintf("%s:%d->%d/%s", hostIP, v.HostPort, v.ContainerPort, v.Protocol))
 	}
-	return strings.Join(arr, ",")
+	return strings.Join(portDisplay, ", ")
 }
-*/