无法使用mysqlclient从docker连接

Question

I'm trying to connect to my mysql container but whenever I try to run mysql -uroot -p I always get bash: mysql: command not found but mysql is already installed in the docker container when I try to run pip3 freeze I get this result

alembic==0.9.6
appdirs==1.4.3
bcrypt==3.1.4
certifi==2017.11.5
cffi==1.11.2
chardet==3.0.4
click==6.7
elasticsearch==5.5.1
flasgger==0.8.0
Flask==0.12.2
Flask-Cors==3.0.3
gevent==1.2.2
greenlet==0.4.12
idna==2.6
iso3166==0.8
itsdangerous==0.24
Jinja2==2.10
jsonschema==2.6.0
Mako==1.0.7
MarkupSafe==1.0
mistune==0.8.3
mock==2.0.0
mysqlclient==1.3.12
packaging==16.8
pbr==3.1.1
pybuilder==0.11.12
pycparser==2.18
pycrypto==2.6.1
pyparsing==2.2.0
python-dateutil==2.6.1
python-editor==1.0.3
PyYAML==3.12
redis==2.10.6
requests==2.18.4
six==1.11.0
SQLAlchemy==1.2.0
tblib==1.3.2
ujson==1.35
urllib3==1.21.1
validate-email==1.3
Werkzeug==0.13

As you can see mysqlclient is installed. If I try to check if mysql container is accessible inside my docker using ping. It's working properly and I was able to get a response. How do I connect now since it says bash: mysql: command not found

-- UPDATE --

After running docker run I connected inside the docker container and run pip install --no-cache-dir -r requirements.txt and below is the output

Now it says requirement already satisfied. I'm not sure but does this mean it already installed the package? Below is my dockerfile

FROM python:3.5.2
ADD deployment /root/.ssh
RUN chmod 700 /root/.ssh/id_rsa
RUN ssh-keyscan -t rsa bitbucket.org > /root/.ssh/known_hosts
RUN mkdir -p /app
ADD . /app
WORKDIR /app
RUN pip install --no-cache-dir -r requirements.txt
WORKDIR /app/myproject
CMD ["python", "./init.py", "-c", "config/config.yaml"]

Answer 1

The problem here is that the CLI command mysql is not installed on your HOST machine. It is most likely installed inside your docker container however. As one of the comments pointed out, the mysqlclient you installed with pip would NOT install the mysql command line tool.

As a quick workaround, I would suggest running the mysql command INSIDE your mysql container, like so:

docker exec -it <container id> mysql -u root -h localhost -p