Docker can't start MariaDB/MySQL during Docker build

Question

My current `Dockerfile` looks like this: ``` FROM ubuntu:14.04 ENV DEBIAN_FRONTEND noninteractive ENV INITRD No ENV LANG en_US.UTF-8 # Maria DB Versions ENV MARIADB_MAJOR 5.5 ENV MARIADB_VERSION 5.5.55+maria-1~trusty # Create mysql user and group RUN groupadd -r mysql && useradd -r -g mysql mysql # Install needed dependencies RUN apt-get update && apt-get install -y --no-install-recommends software-properties-common && rm -rf /var/lib/apt/lists/* # Add the MariaDB PGP key to verify their Debian packages. RUN apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db # Add MariaDB's repository. We use the Ubuntu 14.04 version as there ain't no MariaDB 5.5 for Ubuntu 16.04. RUN add-apt-repository 'deb http://mirror.jmu.edu/pub/mariadb/repo/5.5/ubuntu trusty main' # Install Maria DB and open the access for outside of the container RUN apt-get update \ && apt-get install -y --no-install-recommends mariadb-server=$MARIADB_VERSION \ && rm -rf /var/lib/apt/lists/* \…

Accepted Answer

1)It is not stuck. The MariaDB start running. But you need to use CMD command and not RUN command to achieve your purpose.

The command CMD, similarly to RUN, can be used for executing a specific command. However, unlike RUN it is not executed during build, but when a container is instantiated using the image being built.

2) The last part of your dockerfile should look like this

```
#Run as user mysql
USER mysql

RUN echo "@TODO: Create DB, User and grant access"

#Expose Port
EXPOSE 3306

#Right way to run mysqld
CMD ["mysqld"]
```

For building your image

```
docker build -t testmariadb .
```

For running the built image

```
docker run testmariadb
```

OR ( for detached mode )

```
docker run -d testmariadb
```

3) Please ask your self why are you using ubuntu base image (FROM ubuntu:14.04). According to me you should use https://hub.docker.com/_/mariadb/ if you just want to run mariaDb in the container.

Docker can't start MariaDB/MySQL during Docker build

Solution

Problem