added code to detect docker containers

config/config.go

@@ -9,7 +9,8 @@ var (
 	defaultPath string
 	defaults = map[string]interface{}{
             "IPTable": "/etc/p2p-rendering/ip_table.json",
-            "DockerFile": "/home/akilan/Documents/p2prendering/p2p-redering-computation/server/docker/containers/docker-ubuntu-sshd/",
+            "DockerContainers": "/home/akilan/Documents/p2prendering/p2p-redering-computation/server/docker/containers/",
+            "DefaultDockerFile": "/home/akilan/Documents/p2prendering/p2p-redering-computation/server/docker/containers/docker-ubuntu-sshd/",
             "SpeedTestFile":"/etc/p2p-rendering/50.bin",
     }
 	configName = "config"
@@ -19,9 +20,10 @@ var (
 )
 
 type Config struct {
-	IPTable string
-	DockerFile string
-	SpeedTestFile string
+	IPTable           string
+	DockerContainers  string
+	DefaultDockerFile string
+	SpeedTestFile     string
 }
 
 // Exists reports whether the named file or directory exists.
@@ -45,7 +47,8 @@ func SetDefaults() error {
 
 	//Setting default paths for the config file
 	defaults["IPTable"] = defaultPath + "p2p/ip_table.json"
-	defaults["DockerFile"] = defaultPath + "server/docker/containers/docker-ubuntu-sshd/"
+	defaults["DefaultDockerFile"] = defaultPath + "server/docker/containers/docker-ubuntu-sshd/"
+	defaults["DockerContainers"] = defaultPath + "server/docker/containers/"
 	defaults["SpeedTestFile"] = defaultPath + "p2p/50.bin"
 
 	//Paths to search for config file

server/docker/containers/docker-ubuntu-sshd/description.txt

@@ -0,0 +1 @@
+Simple Ubuntu 20.04 image

server/docker/docker.go

@@ -16,6 +16,7 @@ import (
 	"github.com/lithammer/shortuuid"
 	"github.com/phayes/freeport"
 	"io"
+	"io/ioutil"
 	"os/exec"
 	"time"
 )
@@ -33,6 +34,15 @@ type DockerVM struct {
 	 GPU string `json:"GPU"`
 }
 
+type DockerContainers struct {
+	 DockerContainer []DockerContainer `json:"DockerContainer"`
+}
+
+type DockerContainer struct {
+	ContainerName string `json:"DockerContainerName"`
+	ContainerDescription string `json:"ContainerDescription"`
+}
+
 type ErrorLine struct {
 	Error       string      `json:"error"`
 	ErrorDetail ErrorDetail `json:"errorDetail"`
@@ -44,7 +54,7 @@ type ErrorDetail struct {
 
 var dockerRegistryUserID = ""
 
-func BuildRunContainer(NumPorts int, GPU string) (*DockerVM,error) {
+func BuildRunContainer(NumPorts int, GPU string, ContainerName string) (*DockerVM,error) {
 	//Docker Struct Variable
 	var RespDocker *DockerVM = new(DockerVM)
 
@@ -81,7 +91,7 @@ func BuildRunContainer(NumPorts int, GPU string) (*DockerVM,error) {
 	if err != nil {
 		return nil,err
 	}
-	RespDocker.ImagePath = config.DockerFile
+	RespDocker.ImagePath = config.DefaultDockerFile
 
 	// Gets docker information from env variables
 	cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
@@ -238,7 +248,7 @@ func (d *DockerVM)runContainer(dockerClient *client.Client) error{
 	return nil
 }
 
-// StopAndRemoveContainer TODO: Implement and remove docker instance running
+// StopAndRemoveContainer 
 // Stop and remove a container
 // Reference (https://gist.github.com/frikky/e2efcea6c733ea8d8d015b7fe8a91bf6)
 func StopAndRemoveContainer(containername string) error {
@@ -266,6 +276,47 @@ func StopAndRemoveContainer(containername string) error {
 	return nil
 }
 
+// ViewAllContainers returns all containers runnable and which can be built
+func ViewAllContainers() (*DockerContainers, error){
+	// Traverse the folder path as per given in the config file
+	config, err := config.ConfigInit()
+	if err != nil {
+		return nil,err
+	}
+
+	folders, err := ioutil.ReadDir(config.DockerContainers)
+	if err != nil {
+		return nil, err
+	}
+
+	//Declare variable DockerContainers of type struct
+	var Containers *DockerContainers = new(DockerContainers)
+
+	for _, f := range folders {
+		if f.IsDir() {
+			fmt.Print(f.Name())
+			//Declare variable DockerContainer of type struct
+            var Container DockerContainer
+
+            // Setting container name to folder name
+            Container.ContainerName = f.Name()
+            // Getting Description from file description.txt
+			Description, err := ioutil.ReadFile(config.DockerContainers + "/" + Container.ContainerName + "/description.txt")
+			// if we os.Open returns an error then handle it
+			if err != nil {
+				return nil, err
+			}
+
+			// Get Description from description.txt
+			Container.ContainerDescription = string(Description)
+
+			Containers.DockerContainer = append(Containers.DockerContainer, Container)
+		}
+	}
+
+	return Containers,nil
+}
+
 func print(rd io.Reader) error {
 	var lastLine string
 

server/docker/docker_test.go

@@ -7,7 +7,7 @@ import (
 
 func TestDocker(t *testing.T) {
 	//TODO overwrite with custom docker paths
-	resp,err := BuildRunContainer(2,"true")
+	resp,err := BuildRunContainer(2,"true","")
 
 	if err != nil {
 		t.Error(err)
@@ -15,3 +15,12 @@ func TestDocker(t *testing.T) {
 
 	fmt.Print(resp.VNCPort)
 }
+
+func TestViewAllContainers(t *testing.T) {
+	_,err := ViewAllContainers()
+
+	if err != nil {
+		t.Error(err)
+	}
+
+}

server/rpc.go

@@ -19,8 +19,7 @@ type Docker struct {
 
 // Starts container using RPC calls
 func (l *Listener) StartContainer( reply *Docker) error {
-	fmt.Print("here")
-	vm, err := docker.BuildRunContainer(3,"false")
+	vm, err := docker.BuildRunContainer(3,"false","")
 	if err != nil {
 		return err
 	}

server/server.go

@@ -104,7 +104,7 @@ func Server() error{
 
 		// Creates container and returns back result to
 		// access container
-		resp, err := docker.BuildRunContainer(PortsInt,GPU)
+		resp, err := docker.BuildRunContainer(PortsInt,GPU,"")
 
 		if err != nil {
 			c.String(http.StatusInternalServerError, fmt.Sprintf("error: %s", err))
@@ -122,6 +122,15 @@ func Server() error{
 		c.String(http.StatusOK, "success")
 	})
 
+	//Show images avaliable
+	r.GET("/ShowImages", func(c *gin.Context) {
+		resp, err := docker.ViewAllContainers()
+		if err != nil {
+			c.String(http.StatusInternalServerError, fmt.Sprintf("error: %s", err))
+		}
+		c.JSON(http.StatusOK, resp)
+	})
+
 	// Future feature
 	/*r.GET("/create_vm/:virtualization", func(c *gin.Context) {
 		virtualization := c.Param("virtualization")