provider/docker: Add hosts parameter for containers

builtin/providers/docker/resource_docker_container.go

@@ -130,6 +130,28 @@ func resourceDockerContainer() *schema.Resource {
 				Set:      resourceDockerPortsHash,
 			},
 
+			"hosts": &schema.Schema{
+				Type:     schema.TypeSet,
+				Optional: true,
+				ForceNew: true,
+				Elem: &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"ip": &schema.Schema{
+							Type:     schema.TypeString,
+							Optional: true,
+							ForceNew: true,
+						},
+
+						"host": &schema.Schema{
+							Type:     schema.TypeString,
+							Optional: true,
+							ForceNew: true,
+						},
+					},
+				},
+				Set: resourceDockerHostsHash,
+			},
+
 			"env": &schema.Schema{
 				Type:     schema.TypeSet,
 				Optional: true,
@@ -323,6 +345,21 @@ func resourceDockerPortsHash(v interface{}) int {
 	return hashcode.String(buf.String())
 }
 
+func resourceDockerHostsHash(v interface{}) int {
+	var buf bytes.Buffer
+	m := v.(map[string]interface{})
+
+	if v, ok := m["ip"]; ok {
+		buf.WriteString(fmt.Sprintf("%v-", v.(string)))
+	}
+
+	if v, ok := m["host"]; ok {
+		buf.WriteString(fmt.Sprintf("%v-", v.(string)))
+	}
+
+	return hashcode.String(buf.String())
+}
+
 func resourceDockerVolumesHash(v interface{}) int {
 	var buf bytes.Buffer
 	m := v.(map[string]interface{})

builtin/providers/docker/resource_docker_container_funcs.go

@@ -67,6 +67,11 @@ func resourceDockerContainerCreate(d *schema.ResourceData, meta interface{}) err
 		createOpts.Config.ExposedPorts = exposedPorts
 	}
 
+	extraHosts := []string{}
+	if v, ok := d.GetOk("extra_hosts"); ok {
+		extraHosts = extraHostsSetToDockerExtraHosts(v.(*schema.Set))
+	}
+
 	volumes := map[string]struct{}{}
 	binds := []string{}
 	volumesFrom := []string{}
@@ -100,7 +105,9 @@ func resourceDockerContainerCreate(d *schema.ResourceData, meta interface{}) err
 	if len(portBindings) != 0 {
 		hostConfig.PortBindings = portBindings
 	}
-
+	if len(extraHosts) != 0 {
+		hostConfig.ExtraHosts = extraHosts
+	}
 	if len(binds) != 0 {
 		hostConfig.Binds = binds
 	}
@@ -312,6 +319,19 @@ func portSetToDockerPorts(ports *schema.Set) (map[dc.Port]struct{}, map[dc.Port]
 	return retExposedPorts, retPortBindings
 }
 
+func extraHostsSetToDockerExtraHosts(extraHosts *schema.Set) []string {
+	retExtraHosts := []string{}
+
+	for _, hostInt := range extraHosts.List() {
+		host := hostInt.(map[string]interface{})
+		ip := host["ip"].(string)
+		hostname := host["host"].(string)
+		retExtraHosts = append(retExtraHosts, hostname+":"+ip)
+	}
+
+	return retExtraHosts
+}
+
 func volumeSetToDockerVolumes(volumes *schema.Set) (map[string]struct{}, []string, []string, error) {
 	retVolumeMap := map[string]struct{}{}
 	retHostConfigBinds := []string{}

website/source/docs/providers/docker/r/container.html.markdown

@@ -57,6 +57,7 @@ The following arguments are supported:
   kept running. If false, then as long as the container exists, Terraform
   assumes it is successful.
 * `ports` - (Optional) See [Ports](#ports) below for details.
+* `extra_hosts` - (Optional) See [Extra Hosts](#extra_hosts) below for details.
 * `privileged` - (Optional, bool) Run container in privileged mode.
 * `publish_all_ports` - (Optional, bool) Publish all ports of the container.
 * `volumes` - (Optional) See [Volumes](#volumes) below for details.
@@ -82,6 +83,16 @@ the following:
 * `protocol` - (Optional, string) Protocol that can be used over this port,
   defaults to TCP.
 
+<a id="extra_hosts"></a>
+## Extra Hosts
+
+`extra_hosts` is a block within the configuration that can be repeated to specify
+the extra host mappings for the container. Each `extra_hosts` block supports
+the following:
+
+* `host` - (Required, int) Hostname to add.
+* `ip` - (Required, int) IP address this hostname should resolve to..
+
 <a id="volumes"></a>
 ## Volumes