Make delta application logs easier to parse for multicontainer

Change-type: patch
Signed-off-by: Cameron Diver <cameron@balena.io>

src/application-manager.coffee

@@ -45,6 +45,7 @@ fetchAction = (service) ->
 		action: 'fetch'
 		image: imageForService(service)
 		serviceId: service.serviceId
+		serviceName: service.serviceName
 	}
 
 # TODO: implement additional v2 endpoints
@@ -138,6 +139,7 @@ module.exports = class ApplicationManager extends EventEmitter
 								# and it's relevant mostly for the legacy GET /v1/device endpoint
 								# that assumes a single-container app
 								@reportCurrentState(update_downloaded: true)
+						, step.serviceName
 				)
 			removeImage: (step) =>
 				@images.remove(step.image)

src/compose/images.ts

@@ -89,6 +89,7 @@ export class Images extends (EventEmitter as {
 		image: Image,
 		opts: FetchOptions,
 		onFinish = _.noop,
+		serviceName: string,
 	): Promise<null> {
 		if (this.imageFetchFailures[image.name] != null) {
 			// If we are retrying a pull within the backoff time of the last failure,
@@ -148,7 +149,7 @@ export class Images extends (EventEmitter as {
 			try {
 				let id;
 				if (opts.delta && (opts as DeltaFetchOptions).deltaSource != null) {
-					id = await this.fetchDelta(image, opts, onProgress);
+					id = await this.fetchDelta(image, opts, onProgress, serviceName);
 				} else {
 					id = await this.fetchImage(image, opts, onProgress);
 				}
@@ -598,6 +599,7 @@ export class Images extends (EventEmitter as {
 		image: Image,
 		opts: FetchOptions,
 		onProgress: (evt: FetchProgressEvent) => void,
+		serviceName: string,
 	): Promise<string> {
 		this.logger.logSystemEvent(LogTypes.downloadImageDelta, { image });
 
@@ -609,6 +611,7 @@ export class Images extends (EventEmitter as {
 			image.name,
 			deltaOpts,
 			onProgress,
+			serviceName,
 		);
 
 		if (!Images.hasDigest(image.name)) {

src/lib/docker-utils.ts

@@ -68,6 +68,7 @@ export class DockerUtils extends DockerToolbelt {
 		imgDest: string,
 		deltaOpts: DeltaFetchOptions,
 		onProgress: ProgressCallback,
+		serviceName: string,
 	): Promise<string> {
 		const deltaSourceId =
 			deltaOpts.deltaSourceId != null
@@ -77,7 +78,7 @@ export class DockerUtils extends DockerToolbelt {
 		const timeout = deltaOpts.deltaApplyTimeout;
 
 		const log = (str: string) =>
-			console.log(`delta(${deltaOpts.deltaSource}): ${str}`);
+			console.log(`delta([${serviceName}] ${deltaOpts.deltaSource}): ${str}`);
 
 		if (!_.includes([2, 3], deltaOpts.deltaVersion)) {
 			log(

test/14-application-manager.spec.coffee

@@ -226,6 +226,7 @@ describe 'ApplicationManager', ->
 					image: @applications.imageForService(target.local.apps[0].services[1])
 					serviceId: 24
 					appId: 1234
+					serviceName: 'anotherService'
 				}])
 		)
 
@@ -264,7 +265,8 @@ describe 'ApplicationManager', ->
 					action: 'fetch'
 					image: @applications.imageForService(target.local.apps[0].services[0])
 					serviceId: 23
-					appId: 1234
+					appId: 1234,
+					serviceName: 'aservice'
 				}, { action: 'noop', appId: 1234 }])
 		)