feat: add Docker healthchecks

Dockerfile

@@ -8,7 +8,7 @@ FROM node:12-alpine
 
 WORKDIR /room-assistant
 
-RUN apk add --no-cache bluez bluez-deprecated libusb avahi-dev bind-tools dmidecode tini \
+RUN apk add --no-cache bluez bluez-deprecated libusb avahi-dev bind-tools dmidecode tini curl \
     && setcap cap_net_raw+eip $(eval readlink -f `which node`) \
     && setcap cap_net_raw+eip $(eval readlink -f `which hcitool`) \
     && setcap cap_net_admin+eip $(eval readlink -f `which hciconfig`) \
@@ -17,3 +17,4 @@ COPY --from=build /usr/local/lib/node_modules/room-assistant /usr/local/lib/node
 
 ENTRYPOINT ["tini", "--", "room-assistant"]
 CMD ["--digResolver"]
+HEALTHCHECK --start-period=15s CMD curl --fail http://localhost:6415/status/ || exit 1

dev.Dockerfile

@@ -9,12 +9,13 @@ FROM node:12-alpine
 
 WORKDIR /room-assistant
 
-RUN apk add --no-cache bluez bluez-deprecated libusb avahi-dev bind-tools dmidecode \
+RUN apk add --no-cache bluez bluez-deprecated libusb avahi-dev bind-tools dmidecode tini curl \
     && setcap cap_net_raw+eip $(eval readlink -f `which node`) \
     && setcap cap_net_raw+eip $(eval readlink -f `which hcitool`) \
     && setcap cap_net_admin+eip $(eval readlink -f `which hciconfig`) \
     && ln -s /usr/local/lib/node_modules/room-assistant/bin/room-assistant.js /usr/local/bin/room-assistant
 COPY --from=build /usr/local/lib/node_modules/room-assistant /usr/local/lib/node_modules/room-assistant
 
-ENTRYPOINT ["room-assistant"]
+ENTRYPOINT ["tini", "--", "room-assistant"]
 CMD ["--digResolver"]
+HEALTHCHECK --start-period=15s CMD curl --fail http://localhost:6415/status/ || exit 1

docker-compose.yml

@@ -1,7 +1,9 @@
 version: '3'
 services:
   room-assistant:
-    build: .
+    build:
+      context: .
+      dockerfile: dev.Dockerfile
     network_mode: host
     environment:
       NODE_CONFIG: >

src/status/status.controller.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { StatusController } from './status.controller';
+
+describe('Status Controller', () => {
+  let controller: StatusController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [StatusController]
+    }).compile();
+
+    controller = module.get<StatusController>(StatusController);
+  });
+
+  it('should return healthy', () => {
+    expect(controller.health()).toEqual('healthy');
+  });
+});

src/status/status.controller.ts

@@ -0,0 +1,9 @@
+import { Controller, Get } from '@nestjs/common';
+
+@Controller('status')
+export class StatusController {
+  @Get()
+  health(): string {
+    return 'healthy';
+  }
+}

src/status/status.module.ts

@@ -3,9 +3,11 @@ import { StatusService } from './status.service';
 import { ClusterModule } from '../cluster/cluster.module';
 import { EntitiesModule } from '../entities/entities.module';
 import { ConfigModule } from '../config/config.module';
+import { StatusController } from './status.controller';
 
 @Module({
   imports: [ClusterModule, EntitiesModule, ConfigModule],
-  providers: [StatusService]
+  providers: [StatusService],
+  controllers: [StatusController]
 })
 export class StatusModule {}