Added docker functionality

go.mod

@@ -2,4 +2,13 @@ module git.abbiamoundominio.org/blallo/openportal
 
 go 1.15
 
-require github.com/docker/docker v1.13.1 // indirect
+require (
+	github.com/Microsoft/go-winio v0.4.15 // indirect
+	github.com/docker/distribution v2.7.1+incompatible // indirect
+	github.com/docker/docker v1.13.1 // indirect
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b // indirect
+)

go.sum

@@ -1,2 +1,35 @@
+github.com/Microsoft/go-winio v0.4.15 h1:qkLXKzb1QoVatRyd/YlXZ/Kg0m5K3SPuoD82jjSOaBc=
+github.com/Microsoft/go-winio v0.4.15/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docker/distribution v2.7.1+incompatible h1:a5mlkVzth6W5A4fOsS3D2EO5BUmsJpcB+cRlLU7cSug=
+github.com/docker/distribution v2.7.1+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
 github.com/docker/docker v1.13.1 h1:IkZjBSIc8hBjLpqeAbeE5mca5mNgeatLHBy3GO78BWo=
 github.com/docker/docker v1.13.1/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
+github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
+github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw=
+github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20201110031124-69a78807bb2b h1:uwuIcX0g4Yl1NC5XAz37xsr2lTtcqevgzYNVt49waME=
+golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

main.go

@@ -1,23 +1,59 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
-	//"html/template"
+	"io"
 	"log"
 	"net/http"
+	"os"
+	"time"
+
+	"github.com/docker/go-connections/nat"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
 )
 
 var (
-	Unauthorized    = errors.New("unauthorized")
+	Unauthorized      = errors.New("unauthorized")
-	Unauthenticated = errors.New("unauthenticated")
+	Unauthenticated   = errors.New("unauthenticated")
-	UnknownAuth     = errors.New("unknown authentication method")
+	UnknownAuth       = errors.New("unknown authentication method")
-	USER            = "DUMMY_USER"
+	ContainerNotFound = errors.New("openpod not found")
-	PASSWORD        = "DUMMY_PASSWORD"
+	USER              = "DUMMY_USER"
-	//dockerClient =
+	PASSWORD          = "DUMMY_PASSWORD"
+	PORT              = "8081"
+	dockerClient      *client.Client
+	baseImage         = "openpod/open-pod"
+	timeout           = time.Minute
 )
 
 func init() {
+	var err error
+	dockerClient, err = client.NewEnvClient()
+	if err != nil {
+		log.Fatalln(err)
+	}
+	user, ok := os.LookupEnv("OPENPORTAL_USER")
+	if !ok {
+		log.Print("WARNING: DEFAULT USER")
+	} else {
+		USER = user
+	}
+	pass, ok := os.LookupEnv("OPENPORTAL_PASS")
+	if !ok {
+		log.Print("WARNING: DEFAULT PASSWORD")
+	} else {
+		PASSWORD = pass
+	}
+	port, ok := os.LookupEnv("OPENPORTAL_PORT")
+	if !ok {
+		log.Print("WARNING: DEFAULT PORT")
+	} else {
+		PORT = port
+	}
 }
 
 func verifyAuthentication(r *http.Request) error {
@@ -84,23 +120,117 @@ func cmdHandler(w http.ResponseWriter, r *http.Request) {
 		newVersion = "latest"
 	}
 
-	err := updateOpenPODVersion(newVersion)
+	err := updateOpenPODVersion(newVersion, w)
 	if err != nil {
 		http.Error(w, fmt.Sprint(err), http.StatusInternalServerError)
 		return
 	}
-	fmt.Fprint(w, "Success")
+	fmt.Fprint(w, "\n\n\nSuccess")
 }
 
-func updateOpenPODVersion(newVersion string) error {
+func dockerPull(version string, out io.Writer) error {
-	log.Println("New OpenPOD version:", newVersion)
+	ctx := context.Background()
+	image := fmt.Sprintf("docker.io/%s:%s", baseImage, version)
+	log.Println("Image to be pulled:", image)
+	reader, err := dockerClient.ImagePull(ctx, image, types.ImagePullOptions{})
+	if err != nil {
+		return err
+	}
+	io.Copy(out, reader)
 	return nil
 }
 
+func dockerStart(version string) error {
+	ctx := context.Background()
+	hostConfig := &container.HostConfig{
+		PortBindings: nat.PortMap{
+			"8080/tcp": []nat.PortBinding{
+				{
+					HostIP:   "0.0.0.0",
+					HostPort: "8080",
+				},
+			},
+		},
+	}
+	config := &container.Config{
+		Image: fmt.Sprintf("docker.io/%s:%s", baseImage, version),
+		Env: []string{
+			"APP_HOST=localhost",
+			"APP_PORT=8080",
+			"APP_SCHEME=https",
+			"SECRET_KEY_BASE=\"SWl0xVj8AVXoc2G0eUk6VfeOd/lppjkaKbiHWs4ucxAUJ8+wzAEa4bMo0ZVjtVVk\"",
+		},
+		ExposedPorts: nat.PortSet{
+			"8080/tcp": struct{}{},
+		},
+	}
+
+	resp, err := dockerClient.ContainerCreate(ctx, config, hostConfig, nil, "openpod")
+	if err != nil {
+		return err
+	}
+
+	return dockerClient.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{})
+}
+
+func dockerStop() error {
+	ctx := context.Background()
+	containers, err := dockerClient.ContainerList(ctx, types.ContainerListOptions{All: true})
+	if err != nil {
+		return err
+	}
+
+	for _, container := range containers {
+		if isIn("/openpod", container.Names) {
+			err = dockerClient.ContainerStop(ctx, container.ID, &timeout)
+			if err != nil {
+				return err
+			}
+			return dockerClient.ContainerRemove(ctx, container.ID, types.ContainerRemoveOptions{Force: true})
+		}
+	}
+	return ContainerNotFound
+}
+
+func isIn(t string, l []string) bool {
+	for _, el := range l {
+		if el == t {
+			return true
+		}
+	}
+	return false
+}
+
+func updateOpenPODVersion(newVersion string, out io.Writer) error {
+	var err error
+	log.Println("New OpenPOD version:", newVersion)
+	err = dockerPull(newVersion, out)
+	if err != nil {
+		log.Print("Pull failed")
+		return err
+	}
+	err = dockerStop()
+	switch err {
+	case nil:
+	case ContainerNotFound:
+		log.Println("WARNING: OpenPOD was not running")
+	default:
+		log.Println("Stop failed")
+		return err
+	}
+	err = dockerStart(newVersion)
+	if err != nil {
+		log.Println("Start failed:", err)
+	}
+	return err
+}
+
 func main() {
 	http.HandleFunc("/", manageHandler)
 	http.HandleFunc("/cmd", cmdHandler)
 
-	log.Println("Starting on :8080")
+	bindAddr := fmt.Sprintf(":%s", PORT)
-	log.Fatal(http.ListenAndServe(":8080", nil))
+
+	log.Println("Starting on", bindAddr)
+	log.Fatal(http.ListenAndServe(bindAddr, nil))
 }