docker-compose 健康检查问题

Question

I'm currently working on a microservice project using docker-compose. So I was adding health checks to my containers. But except mysql every thing else stays unhealthy but I don't know why.

Here is my docker-compose.yml file.

version: "3"
services:
  zookeeper:
    image: wurstmeister/zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"

  kafka:
    image: wurstmeister/kafka
    container_name: kafka
    ports:
      - "9092:9092"
    environment:
      KAFKA_ADVERTISED_HOST_NAME: 52.78.52.254
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    depends_on:
      - zookeeper

  mysql:
    image: mysql
    container_name: mysql
    ports:
      - "3306:3306"
    volumes:
      - ./data/mysql:/var/lib/mysql:rw
    environment:
      - MYSQL_ROOT_PASSWORD=dnjscksdn98@
      - MYSQL_DATABASE=explanet_dev
      - MYSQL_USER=alex
      - MYSQL_PASSWORD=dnjscksdn98@
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "mysql", "-u$$MYSQL_USER", "-p$$MYSQL_ROOT_PASSWORD" ]
      interval: 30s
      timeout: 10s
      retries: 3

  api-gateway:
    container_name: api-gateway
    ports:
      - "80:80"
    build:
      context: ./api-gateway
      args:
        ENVIRONMENT: dev
      dockerfile: Dockerfile
    healthcheck:
      test: [ "CMD", "curl", "-f", "http://api-gateway/health-check" ]
      interval: 30s
      timeout: 10s
      retries: 3
    depends_on:
      - mysql

  chatting-service:
    container_name: chatting-service
    ports:
      - "8080:8080"
    build:
      context: ./chatting-service
      args:
        ENVIRONMENT: dev
      dockerfile: Dockerfile
    healthcheck:
      test: [ "CMD", "curl", "-f", "http://chatting-service:8080/health-check" ]
      interval: 30s
      timeout: 10s
      retries: 3
    depends_on:
      - mysql
      - kafka
      - api-gateway

And if I type docker inspect ${any container name} it shows like this in the State .

"Health": {
                "Status": "unhealthy",
                "FailingStreak": 12,
                "Log": [
                    {
                        "Start": "2020-12-01T04:47:28.090046668Z",
                        "End": "2020-12-01T04:47:28.158193366Z",
                        "ExitCode": -1,
                        "Output": "OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused \"exec: \\\"curl\\\": executable file not found in $PATH\": unknown"
                    },
                    {
                        "Start": "2020-12-01T04:47:58.162656864Z",
                        "End": "2020-12-01T04:47:58.233280387Z",
                        "ExitCode": -1,
                        "Output": "OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused \"exec: \\\"curl\\\": executable file not found in $PATH\": unknown"
                    },
                    {
                        "Start": "2020-12-01T04:48:28.238446336Z",
                        "End": "2020-12-01T04:48:28.325520772Z",
                        "ExitCode": -1,
                        "Output": "OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused \"exec: \\\"curl\\\": executable file not found in $PATH\": unknown"
                    },
                    {
                        "Start": "2020-12-01T04:48:58.330407168Z",
                        "End": "2020-12-01T04:48:58.398503364Z",
                        "ExitCode": -1,
                        "Output": "OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused \"exec: \\\"curl\\\": executable file not found in $PATH\": unknown"
                    },
                    {
                        "Start": "2020-12-01T04:49:28.403163576Z",
                        "End": "2020-12-01T04:49:28.477627297Z",
                        "ExitCode": -1,
                        "Output": "OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused \"exec: \\\"curl\\\": executable file not found in $PATH\": unknown"
                    }
                ]
            }

My java Dockerfile looks like this.

FROM adoptopenjdk/openjdk11:alpine-jre
COPY build/libs/base-service-0.0.1-SNAPSHOT.jar base-service.jar
ARG ENVIRONMENT
ENV SPRING_PROFILES_ACTIVE=${ENVIRONMENT}
ENTRYPOINT ["java", "-jar", "base-service.jar"]

I'm currently running on Ubuntu 20.04 server. Is there any solutions?

Answer 1

Hello the error message is pretty clear, you can't run curl for health check because it's not included in base image you use, you need to install it.
Exemple for alpine images