嵌入mongodb的gitlab管道

我正在尝试为使用嵌入式mongo实例的gradle java应用程序构建管道.我已经构建了一个容器,其中包含java和mongo.但是,对于需要嵌入式mongo实例的所有测试,我一直收到以下错误.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'embeddedMongoServer' 
defined in class path resource [org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfiguration.class]: 
Invocation of init method failed; nested exception is java.io.IOException: 
Cannot run program "/tmp/extract-f816c11c-614b-46d7-ad29-68923ca9d624extractmongod": error=2, No such file or directory

我gitlab-ci.yml看起来像这样:

image: java:latest
services:
  - docker:dind

variables:
  GRADLE_OPTS: "-Dorg.gradle.daemon=false"
  DOCKER_DRIVER: overlay
  SPRING_PROFILES_ACTIVE: gitlab-ci

stages:
  - build
  - test

build:
  stage: build
  script: ./gradlew --build-cache assemble
  cache:
    key: "$CI_COMMIT_REF_NAME"
    policy: push
    paths:
      - build
      - .gradle

test:
  stage: test
  image: registry.gitlab.com/path/to/explorer-ci:1.0.0
  script: ./gradlew check --debug
  cache:
    key: "$CI_COMMIT_REF_NAME"
    policy: pull
    paths:
      - build
      - .gradle

构建作业正常,测试作业失败.我的explorer-ci容器是使用以下Dockerfile构建的

FROM openjdk:8-jdk-alpine

RUN apk update && \
    apk add --no-cache \
        mongodb \
        bash

VOLUME /data/db
VOLUME log

RUN ["mongod", "--smallfiles", "--fork", "--logpath", "log/mongodb.log"]

我用一堆不同的配置花了一个星期,但似乎无法破解它.请注意,构建/测试在我的本地计算机上运行良好.我做错了什么想法？