ci: run postgresql as a service in a separate container

.gitlab-ci.yml

@@ -1,7 +1,13 @@
+services:
+  - postgres:latest
+
 variables:
   TEST_FOLDER: database
   DOCKER_IMAGE: ${CI_REGISTRY}/acs/public/villas/web-backend-go
   DOCKER_IMAGE_DEV: ${CI_REGISTRY}/acs/public/villas/web-backend-go/dev
+  POSTGRES_DB: testvillasdb
+  POSTGRES_USER: villasuser
+  POSTGRES_PASSWORD: villasuser
 
 stages:
   - prepare
@@ -21,14 +27,6 @@ prepare:redoc:
     - shell
     - linux
 
-prepare:docker-dev:
-  stage: prepare
-  script:
-    - docker build -f Dockerfile.dev -t $DOCKER_IMAGE_DEV .
-  tags:
-    - shell
-    - linux
-
 # Stage: build
 ##############################################################################
 
@@ -36,14 +34,12 @@ build:backend:
   stage: build
   tags:
     - docker
-  image: ${DOCKER_IMAGE_DEV}
+  image: golang:1.12.9-buster
   script:
     - go mod tidy
-    - go get -u github.com/swaggo/swag/cmd/swag
+    - go install github.com/swaggo/swag/cmd/swag
-    - ~/go/bin/swag init -p pascalcase -g "start.go" -o "./doc/api/"
+    - swag init -p pascalcase -g "start.go" -o "./doc/api/"
     - go build
-  dependencies:
-    - prepare:docker-dev
   artifacts:
     paths:
       - doc/api/swagger.json
@@ -80,9 +76,8 @@ test:all:
   stage: test
   tags:
     - docker
-  image: ${DOCKER_IMAGE_DEV}
+  image: golang:1.12.9-buster
   script:
-    - /etc/init.d/postgresql start
     - go mod tidy
     - go test $(go list ./... ) -p 1 -covermode=count -coverprofile ./testcover.txt
     - go tool cover -func=testcover.txt
@@ -93,12 +88,11 @@ test:database:
   stage: test
   tags:
     - docker
-  image: ${DOCKER_IMAGE_DEV}
+  image: golang:1.12.9-buster
   script:
-    - /etc/init.d/postgresql start
     - go mod tidy
     - cd ${TEST_FOLDER}
-    - go test -v
+    - go test -v -args -dbhost postgresql
   dependencies:
     - build:backend
 
@@ -151,9 +145,7 @@ deploy:docker:
   - docker login -u ${CI_REGISTRY_USER} -p ${CI_REGISTRY_PASSWORD} ${CI_REGISTRY}
   script:
     - docker push ${DOCKER_IMAGE}
-    - docker push ${DOCKER_IMAGE_DEV}
   dependencies:
-    - prepare:docker-dev
     - build:docker
   only:
     - master

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13.4-buster AS builder
+FROM golang:1.12.9-buster AS builder
 
 WORKDIR /go/src/app
 COPY . .

Dockerfile.dev

@@ -1,63 +0,0 @@
-FROM ubuntu:16.04
-
-ARG GIT_REV=unknown
-ARG GIT_BRANCH=unknown
-ARG VERSION=unknown
-ARG VARIANT=unknown
-
-# Update and Upgrade
-RUN apt-get update && apt-get upgrade -y
-
-# Install dependencies
-RUN apt-get install -y git ca-certificates g++ gcc libc6 libc6-dev pkg-config wget tar lsb-release
-
-# Install Go 1.12.9
-RUN cd /tmp && mkdir golang && cd golang && \
-    wget https://dl.google.com/go/go1.12.9.linux-amd64.tar.gz && \
-    tar -xvf go1.12.9.linux-amd64.tar.gz && \
-    mv go /usr/local && \
-    rm -rf /tmp/*
-
-ENV GOROOT=/usr/local/go
-ENV PATH=/usr/local/go/bin:${PATH}
-
-RUN go version
-
-# Add PostgreSQL Repository to Ubuntu
-RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
-    sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -sc)-pgdg main" > /etc/apt/sources.list.d/PostgreSQL.list'
-
-RUN apt-get update && apt-get install -y postgresql-11
-
-# Run the following commands as the ``postgres`` user
-USER postgres
-
-RUN /etc/init.d/postgresql start &&\
-    psql --command "CREATE USER villasuser WITH SUPERUSER PASSWORD 'villasuser';" && \
-    createdb -O villasuser testvillasdb && \
-    createdb -O villasuser villasdb
-
-# Add ``listen_addresses`` to ``/etc/postgresql/11/main/postgresql.conf``
-RUN echo "listen_addresses='*'" >> /etc/postgresql/11/main/postgresql.conf
-
-# Expose the PostgreSQL port
-EXPOSE 5432
-
-WORKDIR /villasweb
-ENTRYPOINT bash
-
-LABEL \
-        org.label-schema.schema-version="1.0" \
-        org.label-schema.name="VILLASweb" \
-        org.label-schema.license="GPL-3.0" \
-        org.label-schema.vcs-ref="$GIT_REV" \
-        org.label-schema.vcs-branch="$GIT_BRANCH" \
-        org.label-schema.version="$VERSION" \
-        org.label-schema.variant="$VARIANT" \
-        org.label-schema.vendor="Institute for Automation of Complex Power Systems, RWTH Aachen University" \
-        org.label-schema.author.name="Sonja Happ" \
-        org.label-schema.author.email="sonja.happ@eonerc.rwth-aachen.de" \
-        org.label-schema.description="A image containing all build-time dependencies for VILLASweb-backend-go based on Fedora" \
-        org.label-schema.url="http://fein-aachen.org/projects/villas-web/" \
-        org.label-schema.vcs-url="https://git.rwth-aachen.de/public/villas/web-backend-go"
-