Unable to install mysql with gitlab CI for django

Hi,

Here’s my gitlab-ci.yml file

image: python:3.6.5

services:
  - mysql:8.0.11

variables:
  MYSQL_ROOT_PASSWORD: Loknag#123
  MYSQL_USER: root


cache:
  paths:
  - ~/.cache/pip/

before_script:
  - python -V
  - mysql -V
  - pip install -r requirements.txt

test:
  script:
  - python manage.py test --keepdb --settings conf.test_settings

I am getting the below error, please help

Running with gitlab-runner 11.2.0-rc2 (1644837a)
  on docker-auto-scale ed2dce3a
Using Docker executor with image python:3.6.5 ...
Starting service mysql:8.0.11 ...
Pulling docker image mysql:8.0.11 ...
Using docker image sha256:5dbe5b6313e13db9674a452938731e74e9ed2adaf13cff3078acdbedae3d4bfa for mysql:8.0.11 ...
Waiting for services to be up and running...
Pulling docker image python:3.6.5 ...
Using docker image sha256:9a58cce9b09fab822c803138dca676c24c5644ce0a3c6a78418eb05fdb3f3f5a for python:3.6.5 ...
Running on runner-ed2dce3a-project-7459534-concurrent-0 via runner-ed2dce3a-srm-1534859390-5c782392...
Cloning repository...
Cloning into '/builds/lokesh1729/smarturl-me'...
Checking out ad1f50d8 as master...
Skipping Git submodules setup
Checking cache for default...
FATAL: file does not exist                         
Failed to extract cache
$ python -V
Python 3.6.5
$ mysql -V
/bin/bash: line 69: mysql: command not found
ERROR: Job failed: exit code 1

Anyone help??