Ansible Playbook execution in Docker container skipping task completion - docker

Question

I am trying to Dockerize a ansible playbook that runs a MySQL dump.
---
- name: MySQL Dump
hosts: lh
connection: local
vars_files:
- ./vars/sql-credentials.yml
- ./vars/aws-credentials.yml
tasks:
- name: Create Folder To Store
file:
state: directory
path: ./backups
- name: Get Dump from MySQL DB
mysql_db:
name: "{{ db_name }}"
config_file: .my.cnf
login_host: "{{ db_login_host }}"
login_user: "{{ db_login_user }}"
login_password: "{{ db_login_password }}"
state: dump
target: "backups/z-{{ ansible_date_time.date }}.sql.gz"
Executing the playbook outside of the container, I get the sql dump file that I am expecting (dump file is about 80mb). When the playbook runs inside the container, it does the playbook finishes early (almost immediately after task was listed) without any errors, the output of the file is 20kb.
FROM ubuntu:bionic
RUN apt-get update && \
apt-get dist-upgrade -y && \
apt-get install -y software-properties-common systemd && \
rm -rf /var/lib/apt/lists/*
RUN apt-add-repository -y ppa:ansible/ansible && apt-get update && apt-get install -y \
git \
ansible \
mysql-client \
python-pip \
python-dev \
build-essential \
&& rm -rf /var/lib/apt/lists/*
COPY . .
RUN pip install -r requirements.txt
RUN echo "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts
CMD [ "ansible-playbook", "-i", "inventory", "playbook.yml", "-vvvv" ]
I've tried running it in verbose mode inside the container, and I'm not getting any errors at all.
The reason why I want to have this run in a container is because I want Travis CI to execute this dump in a CRON and then deploy it to a S3 bucket.