Bind mount kmod if the container is debian or raspbian

Use docker-toolbelt module.
The bind mount is read-only.

CHANGELOG.md

@@ -1,3 +1,5 @@
+* Bind mount kmod if the container is debian or raspbian [Pablo]
+
 # v1.12.1
 
 * Fix preloaded apps by passing appId to extendEnvVars

package.json

@@ -15,6 +15,7 @@
     "coffee-script": "~1.9.1",
     "docker-delta": "0.0.11",
     "docker-progress": "^2.1.0",
+    "docker-toolbelt": "^1.0.0",
     "dockerode": "~2.2.9",
     "event-stream": "^3.0.20",
     "express": "^4.0.0",

src/application.coffee

@@ -165,6 +165,13 @@ fetch = (app) ->
 			logSystemEvent(logTypes.downloadAppError, app, err)
 			throw err
 
+shouldMountKmod = (image) ->
+	docker.imageRootDir(image)
+	.then (rootDir) ->
+		utils.getOSVersion(rootDir + '/etc/os-release')
+	.then (version) ->
+		return version? and (version.match(/^Debian/i) or version.match(/^Raspbian/i))
+
 application.start = start = (app) ->
 	volumes =
 		'/data': {}
@@ -238,13 +245,16 @@ application.start = start = (app) ->
 				portList.forEach (port) ->
 					ports[port + '/tcp'] = [ HostPort: port ]
 			restartPolicy = createRestartPolicy({ name: env['RESIN_APP_RESTART_POLICY'], maximumRetryCount: env['RESIN_APP_RESTART_RETRIES'] })
-			container.startAsync(
-				Privileged: true
-				NetworkMode: 'host'
-				PortBindings: ports
-				Binds: binds
-				RestartPolicy: restartPolicy
-			)
+			shouldMountKmod(app.imageId)
+			.then (shouldMount) ->
+				binds.push('/bin/kmod:/bin/kmod:ro') if shouldMount
+				container.startAsync(
+					Privileged: true
+					NetworkMode: 'host'
+					PortBindings: ports
+					Binds: binds
+					RestartPolicy: restartPolicy
+				)
 			.catch (err) ->
 				statusCode = '' + err.statusCode
 				# 304 means the container was already started, precisely what we want :)

src/device.coffee

@@ -9,6 +9,7 @@ configPath = '/boot/config.json'
 request = Promise.promisifyAll(require('request'))
 execAsync = Promise.promisify(require('child_process').exec)
 fs = Promise.promisifyAll(require('fs'))
+
 exports.getID = do ->
 	deviceIdPromise = null
 	return ->
@@ -219,15 +220,4 @@ do ->
 		return
 
 exports.getOSVersion = ->
-	fs.readFileAsync(config.hostOsVersionPath)
-	.then (releaseData) ->
-		lines = (new String(releaseData)).split('\n')
-		releaseItems = {}
-		for line in lines
-			[ key, val ] = line.split('=')
-			releaseItems[_.trim(key)] = _.trim(val)
-		# Remove enclosing quotes: http://stackoverflow.com/a/19156197/2549019
-		return releaseItems['PRETTY_NAME'].replace(/^"(.+(?="$))"$/, '$1')
-	.catch (err) ->
-		console.log('Could not get OS Version: ', err, err.stack)
-		return undefined
+	return utils.getOSVersion(config.hostOsVersionPath)

src/docker-utils.coffee

@@ -1,4 +1,4 @@
-Docker = require 'dockerode'
+Docker = require 'docker-toolbelt'
 { getRegistryAndName, DockerProgress } = require 'docker-progress'
 Promise = require 'bluebird'
 progress = require 'request-progress'
@@ -9,10 +9,7 @@ knex = require './db'
 { request } = require './request'
 Lock = require 'rwlock'
 
-docker = Promise.promisifyAll(new Docker(socketPath: config.dockerSocket))
-# Hack dockerode to promisify internal classes' prototypes
-Promise.promisifyAll(docker.getImage().constructor.prototype)
-Promise.promisifyAll(docker.getContainer().constructor.prototype)
+docker = new Docker(socketPath: config.dockerSocket)
 
 exports.docker = docker
 dockerProgress = new DockerProgress(socketPath: config.dockerSocket)

src/utils.coffee

@@ -191,3 +191,16 @@ exports.getKnexApp = (appId, columns) ->
 			throw new AppNotFoundError('App not found')
 		return app
 
+exports.getOSVersion = (path) ->
+	fs.readFileAsync(path)
+	.then (releaseData) ->
+		lines = releaseData.toString().split('\n')
+		releaseItems = {}
+		for line in lines
+			[ key, val ] = line.split('=')
+			releaseItems[_.trim(key)] = _.trim(val)
+		# Remove enclosing quotes: http://stackoverflow.com/a/19156197/2549019
+		return releaseItems['PRETTY_NAME'].replace(/^"(.+(?="$))"$/, '$1')
+	.catch (err) ->
+		console.log('Could not get OS Version: ', err, err.stack)
+		return undefined