From 9f3889c76d06f8e1c47b01168a032df809a09e52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9goire=20C?=
 <82955277+gc-advens@users.noreply.github.com>
Date: Tue, 31 Aug 2021 08:20:14 +0200
Subject: [PATCH] Revert changes

---
 functions/onprem/orborus/orborus.go | 67 ++++++++++++++++++++++++++---
 functions/onprem/orborus/run.sh     |  1 +
 2 files changed, 61 insertions(+), 7 deletions(-)

diff --git a/functions/onprem/orborus/orborus.go b/functions/onprem/orborus/orborus.go
index 73faafeb..6ca42b24 100644
--- a/functions/onprem/orborus/orborus.go
+++ b/functions/onprem/orborus/orborus.go
@@ -16,6 +16,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/exec"
 	"strconv"
 	"strings"
 	"time"
@@ -52,12 +53,13 @@ var orgId = os.Getenv("ORG_ID")
 var baseUrl = os.Getenv("BASE_URL")
 var environment = os.Getenv("ENVIRONMENT_NAME")
 var dockerApiVersion = os.Getenv("DOCKER_API_VERSION")
+var runningMode = strings.ToLower(os.Getenv("RUNNING_MODE"))
 var cleanupEnv = strings.ToLower(os.Getenv("CLEANUP"))
 var timezone = os.Getenv("TZ")
-var containerName = os.Getenv("CONTAINER_NAME")
 var executionIds = []string{}
 
 var dockercli *dockerclient.Client
+var containerId string
 
 func init() {
 	var err error
@@ -66,16 +68,60 @@ func init() {
 	if err != nil {
 		panic(fmt.Sprintf("Unable to create docker client: %s", err))
 	}
+
+	getThisContainerId()
+}
+
+// form id of current running container
+func getThisContainerId() {
+	fCol := ""
+
+	// some adjusting based on current running mode
+	switch runningMode {
+	case "kubernetes":
+		// cgroup will be like:
+		// 11:net_cls,net_prio:/kubepods/besteffort/podf132b44d-cfcf-43f7-9906-79f58e268333/851466f8b5ed5aa0f265b1c95c6d2bafbc51a38dd5c5a1621b6e586572150009
+		fCol = "5"
+		log.Printf("[INFO] Running containerized in Kubernetes!")
+
+	case "docker":
+		// cgroup will be like:
+		// 12:perf_event:/docker/0f06810364f52a2cd6e80bfba27419cb8a29758a204cd676388f4913bb366f2b
+		fCol = "3"
+		log.Printf("[INFO] Running containerized in Docker!")
+
+	default:
+		fCol = "3" // for backward-compatibility with production
+		log.Printf("[WARNING] RUNNING_MODE not set - defaulting to Docker (NOT Kubernetes).")
+	}
+
+	if fCol != "" {
+		cmd := fmt.Sprintf("cat /proc/self/cgroup | grep memory | tail -1 | cut -d/ -f%s | grep -o -E '[0-9A-z]{64}'", fCol)
+		out, err := exec.Command("bash", "-c", cmd).Output()
+		if err == nil {
+			containerId = strings.TrimSpace(string(out))
+
+			// cgroup error. Hardcoding this.
+			// https://github.com/moby/moby/issues/7015
+			//log.Printf("Checking if %s is in %s", ".scope", string(out))
+			if strings.Contains(string(out), ".scope") {
+				containerId = "shuffle-orborus"
+				//docker-76c537e9a4b7c7233011f5d70e6b7f2d600b6413ac58a96519b8dca7a3f7117a.scope
+			}
+		} else {
+			if fCol == "0" {
+				containerId = "shuffle-orborus"
+				log.Printf("[WARNING] Failed getting container ID: %s", err)
+			}
+		}
+	}
+
+	log.Printf(`[INFO] Started with containerId "%s"`, containerId)
 }
 
 // Deploys the internal worker whenever something happens
 // https://docs.docker.com/engine/api/sdk/examples/
 func deployWorker(image string, identifier string, env []string) {
-	if containerName == "" {
-		log.Printf("[INFO] CONTAINER_NAME is not set, defaulting to 'shuffle-orborus'")
-		containerName = "shuffle-orborus"
-	}
-
 	// Binds is the actual "-v" volume.
 	// Max 20% CPU every second
 
@@ -91,7 +137,14 @@ func deployWorker(image string, identifier string, env []string) {
 		Binds: []string{
 			"/var/run/docker.sock:/var/run/docker.sock:rw",
 		},
-		NetworkMode: container.NetworkMode(fmt.Sprintf("container:%s", containerName))
+	}
+
+	// form container id and use it as network source if it's not empty
+	if containerId != "" {
+		//log.Printf("[INFO] Found container ID %s", containerId)
+		hostConfig.NetworkMode = container.NetworkMode(fmt.Sprintf("container:%s", containerId))
+	} else {
+		//log.Printf("[INFO] Empty self container id, continue without NetworkMode")
 	}
 
 	if cleanupEnv == "true" {
diff --git a/functions/onprem/orborus/run.sh b/functions/onprem/orborus/run.sh
index 9c6d8db5..48e5b701 100644
--- a/functions/onprem/orborus/run.sh
+++ b/functions/onprem/orborus/run.sh
@@ -3,6 +3,7 @@ docker run \
 	--env ENVIRONMENT_NAME="Shuffle" \
 	--env BASE_URL=http://shuffle-backend:5001 \
 	--env DOCKER_API_VERSION=1.42 \
+	--env RUNNING_MODE="Docker" \
 	--network "shuffle_shuffle" \
 	-v /var/run/docker.sock:/var/run/docker.sock \
 	frikky/shuffle:orborus