Nestcloud with docker-compose consul micro-service connection refused - docker-compose

Question

I've dockerize a nestcloud app with consul and a bunch of microservices.
However, i'm unable to start any of the microservice (for example test-service below, as it seems consul is refusing any tcp connection :
[Nest] 1 - 11/23/2021, 9:47:34 PM [NestFactory] Starting Nest application...
[Nest] 1 - 11/23/2021, 9:50:56 PM [ConfigModule] Unable to initial ConfigModule, retrying...
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] ServiceRegistryModule dependencies initialized +114ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] LoggerModule dependencies initialized +0ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] BootModule dependencies initialized +0ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] HttpModule dependencies initialized +6ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] AppModule dependencies initialized +2ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [InstanceLoader] ConsulModule dependencies initialized +0ms
[Nest] 1 - 11/23/2021, 9:47:34 PM [ConfigModule] Unable to initial ConfigModule, retrying... +39ms
Error: consul: kv.get: connect ECONNREFUSED 127.0.0.1:8500
Here's my docker-compose.yaml :
version: "3.2"
services:
test-service:
build:
context: .
dockerfile: apps/test-service/Dockerfile
args:
NODE_ENV: development
image: "test-service:latest"
restart: always
depends_on:
- consul
environment:
- CONSUL_HOST=consul
- DISCOVERY_HOST=localhost
ports:
- 50054:50054
consul:
container_name: consul
ports:
- "8400:8400"
- "8500:8500"
- "8600:53/udp"
image: consul
command: ["agent", "-server", "-bootstrap", "-ui", "-client", "0.0.0.0"]
labels:
kompose.service.type: nodeport
kompose.service.expose: "true"
kompose.image-pull-policy: "Always"
the Dockerfile for my microservice test-service :
FROM node:12-alpine
ARG NODE_ENV=production
ENV NODE_ENV $NODE_ENV
RUN mkdir -p /usr/src/app
ADD . /usr/src/app
WORKDIR /usr/src/app
RUN yarn global add #nestjs/cli
RUN yarn install --production=false
# Build production files
RUN nest build test-service
# Bundle app source
COPY . .
EXPOSE 50054
CMD ["node", "dist/apps/test-service/main.js"]
and the bootstrap-development.yaml used by nestcloud to launch the microservice
consul:
host: localhost
port: 8500
config:
key: mybackend/config/${{ service.name }}
service:
discoveryHost: localhost
healthCheck:
timeout: 1s
interval: 10s
tcp: ${{ service.discoveryHost }}:${{ service.port }}
maxRetry: 5
retryInterval: 5000
tags: ["v1.0.0", "microservice"]
name: io.mybackend.test.service
port: 50054
loadbalance:
ruleCls: RandomRule
logger:
level: info
transports:
- transport: console
level: debug
colorize: true
datePattern: YYYY-MM-DD h:mm:ss
label: ${{ service.name }}
- transport: file
name: info
filename: info.log
datePattern: YYYY-MM-DD h:mm:ss
label: ${{ service.name }}
# 100M
maxSize: 104857600
json: false
maxFiles: 10
- transport: dailyRotateFile
filename: info.log
datePattern: YYYY-MM-DD-HH
zippedArchive: true
maxSize: 20m
maxFiles: 14d
I can successfully ping the consul container from the microservice container with :
docker exec -ti test-service ping consul
Do you see anything wrong with my config, and if so can you please tell how i can get it to work please ?

Answer 1

You trying to access consul with localhost from NestJs service, this is another container, it's localhost is different from consul localhost, you need to access consule with the container name as the host
Change consul host to ${{ CONSUL_HOST }} in bootstrap-development.yaml.
CONSUL_HOST is defined in docker-compose.yaml: CONSUL_HOST=consul
new bootstrap-development.yaml:
consul:
host: ${{CONSUL_HOST}}
port: 8500
...
and rebuilt the container with : docker-compose --project-directory=. -f docker-compose.dev.yml up --build