Merge pull request #814 from runcom/cache-ip-sandbox

cache sandbox's IP address

libkpod/container_server.go

@@ -294,6 +294,8 @@ func (c *ContainerServer) LoadSandbox(id string) error {
 		return err
 	}
 
+	ip := m.Annotations[annotations.IP]
+
 	processLabel, mountLabel, err := label.InitLabels(label.DupSecOpt(m.Process.SelinuxLabel))
 	if err != nil {
 		return err
@@ -311,6 +313,7 @@ func (c *ContainerServer) LoadSandbox(id string) error {
 	if err != nil {
 		return err
 	}
+	sb.AddIP(ip)
 
 	// We add a netNS only if we can load a permanent one.
 	// Otherwise, the sandbox will live in the host namespace.

libkpod/sandbox/sandbox.go

@@ -154,6 +154,8 @@ type Sandbox struct {
 	hostname       string
 	portMappings   []*hostport.PortMapping
 	stopped        bool
+	// ipv4 or ipv6 cache
+	ip string
 }
 
 const (
@@ -202,6 +204,16 @@ func New(id, namespace, name, kubeName, logDir string, labels, annotations map[s
 	return sb, nil
 }
 
+// AddIP stores the ip in the sandbox
+func (s *Sandbox) AddIP(ip string) {
+	s.ip = ip
+}
+
+// IP returns the ip of the sandbox
+func (s *Sandbox) IP() string {
+	return s.ip
+}
+
 // ID returns the id of the sandbox
 func (s *Sandbox) ID() string {
 	return s.id