I am trying to set up a Dockerfile with an ubuntu image that runs a mysql server (I know I should use the mysql image instead, but I need to do it this way for an assignment). I am having a lot of trouble designing the Dockerfile. My Dockerfile looks like this right now:
FROM ubuntu:latest
EXPOSE 3306
VOLUME [ "/var/lib/mysql" ]
RUN apt update && \
apt install -y mysql-server && \
apt-get install -y gosu
ENV MYSQL_ROOT_PASSWORD=secret
COPY ./wordpress.sql /docker-entrypoint-initdb.d/
COPY ./docker-entrypoint.sh /usr/local/bin/
COPY ./entrypoint.sh /
RUN chmod +x entrypoint.sh && \
chmod +x /docker-entrypoint-initdb.d/wordpress.sql && \
chmod +x /usr/local/bin/docker-entrypoint.sh
ENTRYPOINT ["docker-entrypoint.sh"]
CMD [ "mysqld" ]
(I am running docker build -t sql . to build the image, and docker run --name sql_cont -v sql_vol:/var/lib/mysql sql_img to run the container)
I have a folder where I have the docker-entrypoint.sh file and the entrypoint.sh file, because when I install mysql-server, these files are not created by default as If I was just using the mysql docker image.
I just need a Dockerfile from an ubuntu image that runs mysql and just stays waiting ready for connections, so, If anybody know how to refactor this Dockerfile or just give me the answer I'd much appreciate it.
If I got What is the difference between CMD and ENTRYPOINT in a Dockerfile? right, the argument in CMD will be passed to the ENTRYPOINT. Don’t know about your ENTRYPOINT script, but I expect it to just ignore parameters.
I would suggest to:
not replace the default ENTRYPOINT (defaults to /bin/sh -c)
start the docker-entrypoint.sh from CMD
Append mysqld to docker-ENTRYPOINT.sh
Related
I am totally new in Docker community and I am trying to create a custom container image with mysql and a .war file inside and to run it on a AWS EC2 instance. I've tried a lot but I cannot figure this out..
To build the container image I rum this
docker build -t <name-of-image> -f Dockerfile
I suppose Docker file content should contain something like
FROM mysql:latest
ENV TARGETD /opt/apache-tomcat-9.0.35
ENV WAR /target/NewWebApp.war
RUN apt-get -y update
RUN apt-get -y upgrade
# Create database
RUN mkdir /usr/sql
#RUN CHMOD 644 /usr/sql
ADD db.sql /usr/sql/db.sql
RUN mysql -h localhost -P 3306 --protocol=tcp -u root start && \
mysql -u root -e < /usr/sql/db.sql
EXPOSE 3306
ADD ${WAR} ${TARGETD}/webapps
And to run(deploy) image I use
docker run -d -p 8080:3306 <name-of-image>:latest
I have already installed Tomcat on 8080
What can I do in order to run this image and to be able to access it through AWS EC2?
I have a complex Dockerfile which install much more than just mysql-server so I cannot start from an existing mysql container.
When removing all the extra-stuff I get this Dockerfile
FROM ubuntu:latest
ENV MYSQL_ROOT_PASSWORD=root
ENV MYSQL_ROOT_USER=root
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update
RUN apt-get install -y apt-utils
RUN apt-get install -y mysql-server
RUN usermod -d /var/lib/mysql/ mysql
RUN service mysql start
Unfortunately, mysql does not want to start:
---> 57a66bd64c2c
Step 8/9 : RUN usermod -d /var/lib/mysql/ mysql
---> Running in 596df248c2e4
---> ee78442bcc56
Step 9/9 : RUN service mysql start
---> Running in 0d9e5803cf33
* Starting MySQL database server mysqld
...fail!
The command '/bin/sh -c service mysql start' returned a non-zero code: 1
What is my mistake?
Looks like you've removed the most important parts of your docker file. Here is the Official MySQL repo Docker file.
FROM oraclelinux:7-slim
ENV PACKAGE_URL https://repo.mysql.com/yum/mysql-8.0-community/docker/x86_64/mysql-community-server-minimal-8.0.2-0.1.dmr.el7.x86_64.rpm
# Install server
RUN rpmkeys --import http://repo.mysql.com/RPM-GPG-KEY-mysql \
&& yum install -y $PACKAGE_URL \
&& yum install -y libpwquality \
&& rm -rf /var/cache/yum/*
RUN mkdir /docker-entrypoint-initdb.d
VOLUME /var/lib/mysql
COPY docker-entrypoint.sh /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]
EXPOSE 3306 33060
CMD ["mysqld"]
You need to include a proper source with correct version to pull the image from.
and expose right ports, separate out volumes for MySQL to run. your container maybe failing due to any of this. I'd say remove the MySQL part out of your dockerfile and run the rest of the container.
Use the official mySQL image and install it in separate container. and then you can connect the Database with other apps.
I want to build a new MySQL image based on the official MySQL docker container image. I want to reduce the number of parameters I need to add when running the image. (eg. -e MYSQL_USER, -e MYSQL_DATABASE and even -e MYSQL_ROOT_PASSWORD='rootsecret')
that already includes my settings for the global variables and my Create Database SQL file in the docker-entrypoint-initdb.d folder.
How do I add all my settings and create a new image to simply docker run mysql:config1 docker run mysql:config2 and so on?
You could build your own mysql docker image using a docker file, configure username, password and everything else you might need, build that image, upload it to the docker hub and then when you launch a new docker container you just use the previously built container.
An example of a Docker file to build an ubuntu image with a mysql server inside would be something like bellow (save it to a file called Dockerfile):
FROM ubuntu:latest
RUN apt-get update \
&& apt-get install -y apt-utils \
&& { \
echo debconf debconf/frontend select Noninteractive; \
echo mysql-community-server mysql-community-server/data-dir \
select ''; \
echo mysql-community-server mysql-community-server/root-pass \
password 'Desired-Password'; \
echo mysql-community-server mysql-community-server/re-root-pass \
password 'Desired-Password'; \
echo mysql-community-server mysql-community-server/remove-test-db \
select true; \
} | debconf-set-selections \
&& apt-get install -y mysql-server mysql-client
Then build your mysql docker container like this (you have to be in the folder where the Docker file was/is saved):
docker build my-ubuntu-mysql-docker
Then you have to push it to the docker hub and then you can use it to start a new docker container like this:
docker run -d -p 2222:22 -p 3306:3306 --name my-ubuntu-mysql-docker ...
Where 2222 is local ssh port mapped to ssh port 22 of the docker container and 3306 is local mysql port mapped to the mysql port of the docker container.
I hope this helps!
The following has to be written into the Dockerfile:
FROM mysql:latest
LABEL Name=mylabel Version=0.0.1
COPY path/to/sh/sql/sql.gz/files /docker-entrypoint-initdb.d
ENV MYSQL_ROOT_PASSWORD='rootpassword'
As stated in the documentation on the official docker website:
When a container is started for the first time, a new database with
the specified name will be created and initialized with the provided
configuration variables. Furthermore, it will execute files with
extensions .sh, .sql and .sql.gz that are found in
/docker-entrypoint-initdb.d. Files will be executed in alphabetical
order.
What you you would want to do is to modify Mysql's image entry point
and please note that you do not need to pass all the parameters, most of them are optional
i have problems...
Firstly i have a Dockerfile where i define all the steps, like updating system, installing mysql, change mysql root password.
Then i set an EntryPoint so my container on start will exec mysql server.
I have 2 problems:
- When i start the container, it restarts every 10 seconds.
- When i use exec to enter the docker it says: "No docker with such id".
This is my Dockerfile:
# Set the base image
FROM ubuntu:14.04
MAINTAINER redigaffi
RUN apt-get update \
&& apt-get -y install mysql-server \
&& service mysql start \
&& mysqladmin -u root password FEGj5nmKYRha
ENTRYPOINT service mysql start \
&& bash
#VOLUME /root/mysql:/var/lib/mysql:rw Please run -v running this docker since Dockerfile has not access to host files
EXPOSE 3306
I put bash on the end on the entrypoint because without it container just closes, so it remains in background.
I have tried many commands to execute this container:
docker run -d df0bb600c10f /bin/bash # This one closes the container after 2 seconds
docker run -d --restart=always df0bb600c10f /bin/bash # This one remains, but restarts every 10 seconds and i cant access this docker using exec.
Please help, what is wrong ?
Thank you!
Try using the supervisor. This article here shows the steps.
So i have this Dockerfile:
FROM debian:squeeze
MAINTAINER Name < email : >
# Update the repository sources list
RUN apt-get update
# Install apache, PHP, and supplimentary programs. curl and lynx-cur are for debugging the container.
RUN DEBIAN_FRONTEND=noninteractive apt-get -y install apache2 build-essential php5 mysql-server openssh-server libapache2-mod-php5 php5-mysql php5-gd php-pear php-apc php5-curl curl lynx-cur
# Enable apache mods.
RUN a2enmod php5
RUN a2enmod rewrite
# Manually set up the apache environment variables
ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2
ENV APACHE_LOCK_DIR /var/lock/apache2
ENV APACHE_PID_FILE /var/run/apache2.pid
EXPOSE 80
# Copy site into place.
ADD www /var/www/site
# Update the default apache site with the config we created.
ADD apache-config.conf /etc/apache2/sites-enabled/000-default.conf
# start mysqld and apache
EXPOSE 3306
RUN mkdir /var/run/sshd
RUN echo 'root:123' | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config
EXPOSE 22
CMD bash -c ' (mysqld &); /usr/sbin/apache2ctl -D FOREGROUND;/usr/sbin/sshd -D'
it builds up, no problem,MySQL and Apache start and work fine but the ssh won't work and i don't know why. openssh-server is installed.
i tried starting it up like this:
#startup.sh file
#/bin/bash
sshd
+
ADD ./startup.sh /opt/startup.sh
ENTRYPOINT ["/opt/startup.sh"]
and many other,i'm stuck.
What am i doing wrong?
you are starting apache in the foreground, hence the apachectl process will never give back the hand to the shell that started it and thus the /usr/sbin/sshd -D will never be called (unless you kill apache).
The following instruction will start both mysql and apache in the background and then sshd in the foreground:
CMD bash -c ' (mysqld &); /usr/sbin/apache2ctl start;/usr/sbin/sshd -D'
While such a CMD statement is ok for tests I would advise using a different approach for running multiple processes in a single docker container:
supervisor
phusion/baseimage
Replace below lines of code in the docker file,
RUN mkdir /var/run/sshd
RUN echo 'root:123' | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config
Using these codes
RUN apt-get install -y openssh-server
RUN echo 'root:password' |chpasswd
RUN mkdir -p /var/run/sshd
this works for me.
Note: Use ssh only for debugging purpose, it is not a good practice at all.