Can't mount volume in Docker Compose right - docker

Question

Firstly, I went all that step by step: https://docs.docker.com/language/golang/develop/
Works perfectly.
Then I started to try the same with my golang project. It requires not only db in a volume but also 'assets' and 'creds' directories which I was able to provide working with normal Dockerfile and --mount flag in 'docker run' comand.
So my schema was:
Create a volume 'roach'.
Create a temp container for copying folders.
docker container create --name temp -v roach:/data busybox \
docker cp assets/ temp:/data \
docker rm temp
Run my container with
docker run -it --rm \
--mount 'type=volume,src=roach,dst=/usr/data' \
--network mynet \
--name postgres-server \
-p 80:8080 \
-e PGUSER=totoro \
-e PGPASSWORD=myfriend \
-e PGHOST=db \
-e PGPORT=26257 \
-e PGDATABASE=mydb \
postgres-server
Go files have acces to /usr/data/my_folders
BTW here is Dockerfile:
# syntax=docker/dockerfile:1
FROM golang:1.18-buster AS build
WORKDIR /app
COPY go.mod .
RUN go mod download
COPY . .
RUN go mod tidy
RUN go build -o /t main/main.go main/inst_list.go
## Deploy
FROM gcr.io/distroless/base-debian10
ENV GO111MODULE=on
ENV GOOGLE_APPLICATION_CREDENTIALS='/usr/data/credentials/creds.json'
WORKDIR /
COPY --from=build /t /t
EXPOSE 8080
USER root:root
ENTRYPOINT ["/t"]
================================================================
Then I started to try to make a Docker-compose.yml file like in the end of that example.
It has no --mount flags but I found plenty ways to specify mount path.
I tried much more but left 3 variants of it in code bellow(2 of 3 are commented):
version: '3.8'
services:
docker-t-roach:
depends_on:
- roach
build:
context: .
container_name: postgres-server
hostname: postgres-server
networks:
- mynet
ports:
- 80:8080
environment:
- PGUSER=${PGUSER:-totoro}
- PGPASSWORD=${PGPASSWORD:?database password not set}
- PGHOST=${PGHOST:-db}
- PGPORT=${PGPORT:-26257}
- PGDATABASE=${PGDATABASE-mydb}
deploy:
restart_policy:
condition: on-failure
roach:
image: cockroachdb/cockroach:latest-v20.1
container_name: roach
hostname: db
networks:
- mynet
ports:
- 26257:26257
- 8080:8080
volumes:
# - type: volume
# source: roach
# target: /usr/data
- roach:/usr/data
# - "${PWD}/cockroach-data/roach:/usr/data"
command: start-single-node --insecure
volumes:
roach:
networks:
mynet:
driver: bridge
and it still doesn't work. Moreover it creates 2 Volumes: 'roach' and 'WORKDIRNAME_roach'. I actually tried to copy my folders to both of those. It's not working. The output of build command is alwaysl like that:
postgres-server | STARTED AT
postgres-server | Sep 4 10:43:10
postgres-server | lstat /usr/data/assets/current_batch: no such file or directory
postgres-server | 2022/09/04 10:43:10 lstat /usr/data/assets/current_batch: no such file or directory
(first 2 strings are produced my my go.files, 'assets' is the folder I'm copying)
I think that I'm seaking in the wrong place: maybe the way I copy folders doesn't work with this kind of build?
UPDATE:
At the same time command
docker run -it --rm -v roach:/data ubuntu ls /data/usr
showes that my folders are there. But container is in kind of cycle that doesn't let him see them.

Answer 1

Mihai is tried to help but I didn't understand what he meant. He actually meant that I had to add volume to my app service. I did it now and it works. In example bellow I named 2 volumes for db and app different just for better accuracy:
version: '3.8'
services:
docker-parser:
depends_on:
- roach
build:
context: .
container_name: parser
hostname: parser
networks:
- mynet
ports:
- 80:8080
volumes:
- assets:/data
environment:
- PGUSER=${PGUSER:-totoro}
- PGPASSWORD=${PGPASSWORD:?database password not set}
- PGHOST=${PGHOST:-db}
- PGPORT=${PGPORT:-26257}
- PGDATABASE=${PGDATABASE-mydb}
deploy:
restart_policy:
condition: on-failure
roach:
image: cockroachdb/cockroach:latest-v20.1
container_name: roach
hostname: db
networks:
- mynet
ports:
- 26257:26257
- 8080:8080
volumes:
- roach:/db
command: start-single-node --insecure
volumes:
assets:
roach:
networks:
mynet:
driver: bridge