Variáveis de Ambiente

~/compose$ ls
compose.yaml
~/compose$ vim compose.yaml

Se as variáveis de ambiente não forem especificadas, por exemplo, para a imagem postgres, o container não permance em execução.

Postgres - Official Image | Docker Hub

Arquivo compose.yaml editado para remover os containers nginx e especificar somente o container postgre:

version: "3.8"

services:
  postgre:
    image: postgres:13.16
    ports:
      - 5432:5432
    environment:
      POSTGRES_PASSWORD: kubenews
      POSTGRES_USER: kubenews
      POSTGRES_DB: kubenews

Subida do Docker Compose em mode detach:

~/compose$ docker compose up -d
[+] Running 1/1
 ✔ Container compose-postgre-1  Started

Teste de conexão com o DBeaver:

Na subida do compose foram encontrados alguns containers órfãos. Eles foram criados recentemente com o mesmo arquivo compose.yaml.

Com o arquivo compose.yaml atual, a especificação destes containers foram sobrescritos para a especificação do banco de dados postgre.

Por padrão, os containers não são eliminados.

Informações obtidas com a subida do Docker Compose em modo detach:

~/compose$ docker compose up -d
WARN[0000] /home/marcelo/compose/compose.yaml: the attribute `version` is obsolete, 
it will be ignored, please remove it to avoid potential confusion
WARN[0000] Found orphan containers ([nginx02 nginx]) for this project. 
If you removed or renamed this service in your compose file, 
you can run this command with the --remove-orphans flag to clean it up.
[+] Running 1/1
 ✔ Container compose-postgre-1  Started

É possível verificar que os containers ainda existem:

$ docker container ls -a
CONTAINER ID   IMAGE            COMMAND                  CREATED         STATUS                        PORTS
                           NAMES
3ff758148126   postgres:13.16   "docker-entrypoint.s…"   6 minutes ago   Up 5 minutes                  0.0.0.0:5432->5432/tcp, :::5432->5432/tcp   compose-postgre-1
06e0af593137   nginx:latest     "/docker-entrypoint.…"   24 hours ago    Exited (255) 16 minutes ago   0.0.0.0:8181->80/tcp, :::8181->80/tcp       nginx02
7542994383e7   nginx:latest     "/docker-entrypoint.…"   24 hours ago    Exited (255) 16 minutes ago   0.0.0.0:8080->80/tcp, :::8080->80/tcp       nginx

Subida do Docker Compose com a remoção dos containers órfãos:

$ docker compose up -d --remove-orphans
WARN[0000] /home/marcelo/compose/compose.yaml: the attribute `version` is obsolete, 
it will be ignored, please remove it to avoid potential confusion
[+] Running 3/0
 ✔ Container nginx              Removed                                    0.0s
 ✔ Container nginx02            Removed                                    0.0s
 ✔ Container compose-postgre-1  Running                                    0.0s

$ docker container ls -a
CONTAINER ID   IMAGE            COMMAND                  CREATED         STATUS         PORTS                                       NAMES
3ff758148126   postgres:13.16   "docker-entrypoint.s…"   7 minutes ago   Up 7 minutes   0.0.0.0:5432->5432/tcp, :::5432->5432/tcp   compose-postgre-1