Docker compose 保持运行健康检查

Question

我正在使用 docker 组合运行几个服务。

数据加载器服务必须等待翻译器，但是一旦数据加载器运行，运行状况检查不会停止执行，即使在退出后也是如此。

translator:
build: ./translator
container_name: translator
command: uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
healthcheck:
  test: curl -f translator:8000/healthcheck || exit 1
  interval: 5s
  timeout: 5s
  retries: 5
env_file:
  - ./translator/.env
networks:
  - fds-network
ports:
  - 8000:8000
restart: always
depends_on:
  - redis
volumes:
  - ./translator:/app/

data-loader:
build:
  context: ./data-loader
  dockerfile: Dockerfile
container_name: data-loader
command: python3 app/main.py
environment:
  - "DOCKER=true"
  - "BASE_LANG=es"
  - "LOAD_DISEASES=false"
depends_on:
  cassandra-load-keyspace:
    condition: service_completed_successfully
  translator:
    condition: service_healthy
env_file:
  - ./data-loader/.env
networks:
  - fds-network

运行状况检查的端点：

@app.get("/healthcheck")
async def healthcheck():
    return {"status": "ok"}

这是控制台 output：

cassandra-load-keyspace exited with code 0
data-loader              | Dataloader connected to Cassandra
data-loader              | Dataloader started
data-loader              | load diseases False
data-loader              | Skipping disease loading
translator               | INFO:     172.18.0.4:46638 - "GET /healthcheck HTTP/1.1" 200 OK
data-loader exited with code 0
translator               | INFO:     172.18.0.4:56822 - "GET /healthcheck HTTP/1.1" 200 OK
translator               | INFO:     172.18.0.4:56836 - "GET /healthcheck HTTP/1.1" 200 OK
translator               | INFO:     172.18.0.4:40618 - "GET /healthcheck HTTP/1.1" 200 OK
translator               | INFO:     172.18.0.4:40624 - "GET /healthcheck HTTP/1.1" 200 OK
translator               | INFO:     172.18.0.4:51620 - "GET /healthcheck HTTP/1.1" 200 OK
translator               | INFO:     172.18.0.4:51630 - "GET /healthcheck HTTP/1.1" 200 OK

等等。

如果数据加载器服务正在运行，那是因为健康检查正常，并且对端点的调用次数大于健康检查条件下的尝试次数，并且没有更多的服务或函数调用该端点，所以它必须是撰写时的 healthechk。

这里有什么问题？

Answer 1

所以它必须是撰写时的healthechk。

是的，translator 健康检查由 docker 运行，每隔 5 秒interval: 5s ，是否有任何依赖服务在运行。