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authorMatthew Heon <matthew.heon@gmail.com>2018-01-05 15:15:52 -0500
committerAtomic Bot <atomic-devel@projectatomic.io>2018-01-08 13:54:32 +0000
commite2675ef921e6acb0131ddb5d81fe2d022ba8e022 (patch)
treea6187ac955650d5d766197771285927d1cbde1eb
parent09d12d9be669567a0217eb3972089631457a834d (diff)
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Add function to get IP address of a running container
Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #192 Approved by: rhatdan
-rw-r--r--libpod/container.go18
-rw-r--r--libpod/networking.go21
2 files changed, 39 insertions, 0 deletions
diff --git a/libpod/container.go b/libpod/container.go
index efb4873b0..31f84ebb5 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -5,6 +5,7 @@ import (
"fmt"
"io"
"io/ioutil"
+ "net"
"os"
"path/filepath"
"strconv"
@@ -297,6 +298,23 @@ func (c *Container) LogPath() string {
return c.logPath()
}
+// IPAddress returns the IP address of the container
+// If the container does not have a network namespace, an error will be returned
+func (c *Container) IPAddress() (net.IP, error) {
+ c.lock.Lock()
+ defer c.lock.Unlock()
+
+ if err := c.syncContainer(); err != nil {
+ return nil, errors.Wrapf(err, "error updating container %s state", c.ID())
+ }
+
+ if !c.config.CreateNetNS || c.state.NetNS == nil {
+ return nil, errors.Wrapf(ErrInvalidArg, "container %s does not have a network namespace", c.ID())
+ }
+
+ return c.runtime.getContainerIP(c)
+}
+
// ExitCode returns the exit code of the container as
// an int32
func (c *Container) ExitCode() (int32, error) {
diff --git a/libpod/networking.go b/libpod/networking.go
index 3819d803d..966b40238 100644
--- a/libpod/networking.go
+++ b/libpod/networking.go
@@ -113,6 +113,27 @@ func joinNetNS(path string) (ns.NetNS, error) {
return ns, nil
}
+// Get a container's IP address
+func (r *Runtime) getContainerIP(ctr *Container) (net.IP, error) {
+ if ctr.state.NetNS == nil {
+ return nil, errors.Wrapf(ErrInvalidArg, "container %s has no network namespace, cannot get IP", ctr.ID())
+ }
+
+ podNetwork := getPodNetwork(ctr.ID(), ctr.Name(), ctr.state.NetNS.Path(), ctr.config.PortMappings)
+
+ ipStr, err := r.netPlugin.GetPodNetworkStatus(podNetwork)
+ if err != nil {
+ return nil, errors.Wrapf(err, "error retrieving network status of container %s", ctr.ID())
+ }
+
+ ip := net.ParseIP(ipStr)
+ if ip == nil {
+ return nil, errors.Wrapf(ErrInternal, "error parsing IP address %s for container %s", ipStr, ctr.ID())
+ }
+
+ return ip, nil
+}
+
// Tear down a network namespace
func (r *Runtime) teardownNetNS(ctr *Container) error {
if ctr.state.NetNS == nil {