Order containers returned from state and make container config public

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #63
Approved by: baude

libpod/container.go

@@ -46,7 +46,7 @@ const (
 
 // Container is a single OCI container
 type Container struct {
-	config *containerConfig
+	config *ContainerConfig
 
 	pod         *Pod
 	runningSpec *spec.Spec
@@ -59,7 +59,7 @@ type Container struct {
 	runtime *Runtime
 }
 
-// containerState contains the current state of the container
+// containerRuntimeInfo contains the current state of the container
 // It is stored on disk in a tmpfs and recreated on reboot
 type containerRuntimeInfo struct {
 	// The current state of the running container
@@ -88,10 +88,10 @@ type containerRuntimeInfo struct {
 	// TODO: Save information about image used in container if one is used
 }
 
-// containerConfig contains all information that was used to create the
+// ContainerConfig contains all information that was used to create the
 // container. It may not be changed once created.
 // It is stored, read-only, on disk
-type containerConfig struct {
+type ContainerConfig struct {
 	Spec *spec.Spec `json:"spec"`
 	ID   string     `json:"id"`
 	Name string     `json:"name"`
@@ -153,6 +153,14 @@ func (c *Container) Labels() map[string]string {
 	return labels
 }
 
+// Config returns the configuration used to create the container
+func (c *Container) Config() *ContainerConfig {
+	returnConfig := new(ContainerConfig)
+	deepcopier.Copy(c.config).To(returnConfig)
+
+	return returnConfig
+}
+
 // LogPath returns the path to the container's log file
 // This file will only be present after Init() is called to create the container
 // in runc
@@ -235,7 +243,7 @@ func newContainer(rspec *spec.Spec) (*Container, error) {
 	}
 
 	ctr := new(Container)
-	ctr.config = new(containerConfig)
+	ctr.config = new(ContainerConfig)
 	ctr.state = new(containerRuntimeInfo)
 
 	ctr.config.ID = stringid.GenerateNonCryptoID()

libpod/sql_state.go

@@ -544,7 +544,8 @@ func (s *SQLState) AllContainers() ([]*Container, error) {
                               containerState.Pid
                       FROM containers
                       INNER JOIN
-                          containerState ON containers.Id = containerState.Id;`
+                          containerState ON containers.Id = containerState.Id
+                      ORDER BY containers.CreatedTime DESC;`
 
 	if !s.valid {
 		return nil, ErrDBClosed

libpod/sql_state_internal.go

@@ -186,7 +186,7 @@ func ctrFromScannable(row scannable, runtime *Runtime, specsDir string) (*Contai
 	}
 
 	ctr := new(Container)
-	ctr.config = new(containerConfig)
+	ctr.config = new(ContainerConfig)
 	ctr.state = new(containerRuntimeInfo)
 
 	ctr.config.ID = id

libpod/sql_state_test.go

@@ -15,7 +15,7 @@ import (
 
 func getTestContainer(id, name string) *Container {
 	ctr := &Container{
-		config: &containerConfig{
+		config: &ContainerConfig{
 			ID:              id,
 			Name:            name,
 			RootfsImageID:   id,
@@ -518,4 +518,15 @@ func TestGetAllContainersTwoContainers(t *testing.T) {
 	ctrs, err := state.AllContainers()
 	assert.NoError(t, err)
 	assert.Equal(t, 2, len(ctrs))
+
+	// Containers should be ordered by creation time
+
+	// Use assert.EqualValues if the test fails to pretty print diff
+	// between actual and expected
+	if !testContainersEqual(testCtr2, ctrs[0]) {
+		assert.EqualValues(t, testCtr2, ctrs[0])
+	}
+	if !testContainersEqual(testCtr1, ctrs[1]) {
+		assert.EqualValues(t, testCtr1, ctrs[1])
+	}
 }