docker-compose with postgresql replication (no volumes, no scripts)

.gitlab-ci.yml

image: golang:1.21.0
stages:
  - test

tests/integration:
  stage: test
  parallel:
    matrix:
      - VERSION:
          - "16-alpine3.18"
#          - "15-alpine3.18"
#          - "14-alpine3.18"
#          - "13-alpine3.18"
#          - "12-alpine3.18"
#          - "11-alpine3.18"
#          - "10-alpine3.16" # there is no image with -alpine3.18
#          - "9.6"
#          - "9.5"
  services:
    - name: postgres:${VERSION}
      alias: postgres
      command:
        - bash
        - -c
        - echo -n -e "#!/bin/bash\necho \"host replication all all trust\" >>/var/lib/postgresql/data/pg_hba.conf\npsql -U postgres -c \"SELECT pg_reload_conf()\"" > /docker-entrypoint-initdb.d/hba.sh; chmod 755 /docker-entrypoint-initdb.d/hba.sh; docker-entrypoint.sh postgres -c 'shared_preload_libraries="pg_stat_statements"'
    - name: postgres:${VERSION}
      alias: standby
      command:
        - bash
        - -c
        - until pg_isready -h postgres; do sleep 1; done && pg_basebackup -P -R -X stream -c fast -h postgres -U postgres -D /var/lib/postgresql/data; docker-entrypoint.sh postgres
  variables:
    FF_NETWORK_PER_BUILD: "true"
    POSTGRES_HOST_AUTH_METHOD: trust
  image: golang:1.21.0-alpine3.18
  before_script:
    - apk add git curl make procps postgresql-client
    - while [ $(psql -qAtX -h postgres -U postgres -c 'SELECT count(1) FROM pg_stat_replication') -eq 0 ]; do sleep 1; done
    - psql -h postgres -U postgres -d postgres -c "TABLE pg_stat_replication"
    - make build
  script:
    - ./build/otel-collector --config config_ci_primary.yml &> primary.out &
    - while [ $(curl -s -o /dev/null -w "%{http_code}" 127.0.0.1:8889/metrics) -ne 200 ] ; do sleep 1; done
    - curl -s 127.0.0.1:8889/metrics |grep -oE '^postgresql_[a-z]+' |sort |uniq -c |sort -rnk1
    - /usr/bin/pkill -15 -f otel-collector || echo "process not found, ok"
    # add the same tests against standby
  artifacts:
    paths:
      - ./primary.out

docker-compose.yml

version: "3.9"

services:
  primary:
    image: postgres:15rc1
    ports:
      - "15432:5432"
    environment:
      POSTGRES_HOST_AUTH_METHOD: trust
    command:
      - bash
      - -c
      - echo -n -e "#!/bin/bash\necho \"host replication all all trust\" >>/var/lib/postgresql/data/pg_hba.conf\npsql -U postgres -c \"SELECT pg_reload_conf()\"" > /docker-entrypoint-initdb.d/test.sh; chmod 755 /docker-entrypoint-initdb.d/test.sh; docker-entrypoint.sh postgres

  standby:
    image: postgres:15rc1
    ports:
      - "15433:5432"
    environment:
      POSTGRES_HOST_AUTH_METHOD: trust
    command:
      - bash
      - -c
      - until pg_isready -h primary; do sleep 1; done && pg_basebackup -P -R -X stream -c fast -h primary -U postgres -D /var/lib/postgresql/data; docker-entrypoint.sh postgres
    depends_on: [ primary ]