I have from issue running mysql using Dockerfile
FROM mysql:latest
# Add a database
ENV MYSQL_DATABASE some_table_name
ENV MYSQL_ROOT_PASSWORD some_password
ADD some_table.sql /docker-entrypoint-initdb.d
ENTRYPOINT /bin/bash
Building an image works for this code but mysql service is not found in the container when I try to run service mysql start. mysqld command would not run due to some root security issues. Is anyone able to help? Thank you.
Remove the ENTRYPOINT
build and run the container.
Run another process to check inside the container name like:
docker exec -ti {containername} mysql -u root -p
This will check the password is set right. Then SHOW CREATE TABLE {db.tablename}
Related
I want to install nginx and mysql in same image. I start out with a mysql image with the plan to install docker using dockerfile.
Here is my dockerfile:
FROM mysql:latest
ENV MYSQL_ROOT_PASSWORD=HelloWorld \
MYSQL_DATABASE=content
RUN apt update
RUN apt install nginx -y
COPY nginx.conf /etc/nginx/nginx.conf
This starts the mysql db perfectly and nginx also gets installed. Unfortunately, nginx doesn't start. To start nginx I also added another command in the docker file:
CMD service nginx start
After adding this line in the dockerfile, the container closes after creation. What am I doing wrong here?
I am using below command to start container with above image:
docker run -it -p 3306:3306 -p 8080:80 -p 8081:443 --name mycontainer myimage
it's best to run each process in a separate container. but if you wanna do that, you should create a bash file to start MySQL and Nginx. finally, you should use that bash file as the ENTRYPOINT of your image/container
I am building a docker machine using the image "mysql". I have some setup script to run for the first time the machine is built. This setup script will create some database and dabase users with specified permmissions.
Following are the minimized version of my files..
pcdb1.entrypoint.sh
#!/bin/sh
mysql -uroot -p'pass123' -e 'show databases MYENTRYDB;'
Dockerfile
FROM mysql:5.7
COPY ./pcdb1.entrypoint.sh /
ENTRYPOINT ["/pcdb1.entrypoint.sh"];
I am getting the following error in the log
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
pcdb1 exited with code 1
What I understood is, my script is trying to run before mysql is started. But I am not sure how to do it properly. Can I get a suggestion?
EDIT: 20181007
I have found the way you mentioned in question--initialize DB while building docker image. But with a little difference, the way I found seems like initializing DB while running a container from image, although the initializing script was specified while building the image.
According to the official information about mysql:5.7, there is paragraph named "Initializing a fresh instance". We could just add a initializing script into the directory /docker-entrypoint-initdb.d, the default ENTRYPOINT and CMD of image mysql:5.7 would execute it after database start-up.
For example:
FROM mysql:5.7
COPY init-database.sql /docker-entrypoint-initdb.d/
content of init-database.sql:
create database light;
create user 'light'#'%' identified by 'abc123';
grant all privileges on light.* to 'light'#'%' identified by 'abc123';
grant all privileges on light.* to 'light'#'localhost' identified by 'abc123';
Build new image:
docker build -t light/mysql:5.7 .
Run a container:
docker run -tid --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD='abc123' light/mysql:5.7
Examine initialization:
docker run -ti mysql /bin/bash
root#25e73d40c4ff:/# mysql -uroot -p
Enter password: (abc123)
Welcome to the MySQL monitor.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
All work well.
Former answer below.
How to start mysql damon in container?
First of all, you are right on "trying to run before mysql is started" part. But still, there is a missing on "how MySQL starts exactly". If you execute docker history mysql:5.7 --no-trunc, you could see three important records among output like below:
/bin/sh -c #(nop) CMD ["mysqld"]
/bin/sh -c #(nop) ENTRYPOINT ["docker-entrypoint.sh"]
/bin/sh -c ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh
So far we should know when we start a mysql container with command below, the exact initial command in container is docker-entrypoint.sh mysqld.
docker run -tid -e MYSQL_ROOT_PASSWORD='abc123' mysql:5.7
How to initiate mysql in container?
Secondly, let's now have a check on docker-entrypoint.sh script.
There is a specific line like below, just at roughly middle position of this script, which means to start mysql daemon.
mysql=( mysql --protocol=socket -uroot -hlocalhost --socket="${SOCKET}" )
After starting mysql, we could see lots of initiating statements in docker-entrypoint.sh script. Such as creating root user with password or not, granting privileges to root, creating database declared by users with MYSQL_DATABASE env and so on.
Now here are solutions offered for you.
Self-defining the docker-entrypoint.sh script.
In this way, you could whatever you want which is legal in mysql.
Get the whole entrypoint.sh script on your host.
Add your self-definition of mysql in the script, make your
self-defining content at the bottom of this script. I assume you
don't want to mess it with original content.
Build a new mysql image for your own with command and Dockerfile below.
command: docker build -t mysql:self .
Dockerfile:
FROM mysql:5.7
COPY /path/to/your-entrypoint.sh /
ENTRYPOINT ["/your-entrypoint.sh"]
CMD ["mysqld"]
If your don't want a new image, there is another way to change
ENTRYPOINT when you run a container. But still, you should make your own script available in container.
docker run -tid -v /path/to/your-entrypoint.sh:/entrypoint.sh -p 3306:3306 -e MYSQL_ROOT_PASSWORD='abc123' mysql:5.7
Using default ENVs provided by mysql:5.7
In this way, there is a limit, especially on "specified permmissions" you mentioned.
The ENVs you need are: MYSQL_DATABASE, MYSQL_USER, MYSQL_PASSWORD.
The command should like this:
docker run -tid -e MYSQL_ROOT_PASSWORD='abc123' -e MYSQL_DATABASE='apps' -e MYSQL_USER='light' -e MYSQL_PASSWORD='abc123' mysql:5.7
This means that the database apps and user light will be created automatically, and the user light will be granted superuser permissions for the database apps.
More reference here on hub.docker.com.
I want to deploy data slot to the distributed mysql databases via middleware，need one mysql docker container running two instances with different port, eg. 3306 and 3316.
tried many ways, such as:
Add mysql_3316.sh:
#!/bin/bash
/entrypoint.sh --defaults-file=/etc/mysql/my_3316.cnf
in the rc.local:
#!/bin/sh -e
/usr/local/bin/mysql_3316.sh || exit 1
exit 0
and modified the Dockerfile like below,
RUN touch /etc/mysql/my_3316.cnf
COPY mysql_3316.sh /usr/local/bin/mysql_3316.sh
RUN chmod +x /usr/local/bin/mysql_3316.sh
COPY rc.local /etc/rc.local
RUN chmod +x /etc/rc.local
RUN chown root:root /etc/rc.local
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306 3316
CMD ["mysqld"]
it doesn't work while the mysql container comes up, but the 3316 mysql
port instance works by run the /entrypoint.sh --defaults-file=/etc/mysql/my_3316.cnf shell line manually.
tried the init.d ,
RUN touch /etc/mysql/my_3316.cnf
COPY mysql_3316.sh /etc/init.d/mysql_3316
RUN chmod +x /etc/init.d/mysql_3316
RUN update-rc.d mysql_3316 defaults 99
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306 3316
CMD ["mysqld"]
doesn't work too.
tried the crontab,
#reboot /usr/local/bin/mysql_3316.sh
#Don't remove the empty line at the end of this file. It is required to run the cron job
and the Dockerfile as that,
COPY mysql_3316.sh /usr/local/bin/mysql_3316.sh
RUN chmod +x /usr/local/bin/mysql_3316.sh
ADD crontab /etc/cron.d/docker-cron
RUN chmod +x /etc/cron.d/docker-cron
RUN crontab /etc/cron.d/docker-cron
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306 3316
CMD ["mysqld"]
doesn't work third.
It's been spent much on this key, almost give up...
Any kindly suggestion are welcomed please.
The docker-compose.yml for mysql right here:
services:
mysql:
image: mysql:latest
container_name: mysql
hostname: mysql
restart: unless-stopped
networks:
dockernet:
ipv4_address: 172.18.0.5
ports:
- 3306:3306
- 3316:3316
volumes:
- /Docker/mysql/:/var/lib/mysql/
- ./docker/mysql/mysql/my.cnf:/etc/mysql/my.cnf
- ./docker/mysql/mysql/my_3316.cnf:/etc/mysql/my_3316.cnf
- ./docker/mysql/mysql/logs/:/var/log/mysql/
- ./docker/mysql/mysql/init/:/docker-entrypoint-initdb.d/
entrypoint: ['/entrypoint.sh', '--default-authentication-plugin=mysql_native_password']
Normally you do NOT want to run more than one process in the same container. Despite your title I really think that what you are looking for is to start two containers, both from a MySQL image.
You should not need to change any startup scripts, Dockerfile or anything else to start up similar containers bound to different ports.
Remember that the EXPOSE command only exposes the ports to different containers, not to the outside world.
To access the port you need to use the -p flag with your docker run: https://docs.docker.com/engine/reference/run/#expose-incoming-ports
You can use the same docker image from the same Dockerfile. Just give different -p parameter when you run.
Edit:
You added your docker-compose.yml after my initial response. Using docker-compose will make my advice about -p obsolete, and you should use the ports: section of the docker-compose.yml to vary the port numbers instead.
This answer, however, might not be what you are looking for because based on your comment I think I do not fully understand your use case here.
Use the stock mysql container and just run:
docker run -p3306:3306 --name mysql1 mysql
docker run -p3316:3306 --name mysql2 mysql
# plus appropriate -d -e ... -v ... as needed on both commands
Don't try to build your own image and definitely don't try to run two servers with expected different lifetimes in a single container.
Hi there,
I'm trying to create a docker container that will run a mysql script which generates a database and then table. My Dockerfile looks like this:
FROM mysql:latest
WORKDIR /
ADD . /
EXPOSE 3306
CMD mysql -u "root" -proot < "schema.sql"
I create the image through this:
docker build -t database .
And then I run it through this:
docker run -d -p 3306:3306 database
At this point the script should be run- however instead I just get this random line in the terminal:
0b2503b42482a4fa840351925845392e1abdf6022b23447187ff49ed4f0fa05b
Grateful for your help!
you are getting 0b2503b42482a4fa840351925845392e1abdf6022b23447187ff49ed4f0fa05b because of the option "-d" in docker run -d -p 3306:3306 database which indicates that the container will be running in the background. You can remove it if you dont want that.
For more info about this please check this link: Docker run command
The container should be running though.
Check the command Docker ps that will show you infos about running containers.
Hope this helps!
don't worry, this is 0b2503b42482a4fa840351925845392e1abdf6022b23447187ff49ed4f0fa05b ID from container.
You can use id to stop or check status or collect information of container. if you want check your command is work or not, you can run with this command docker run -it database bash or docker run -it database sh
Hope this helps.
Best Regards
as you are overriding CMD entry command in docker file, you would need to start mysqld service explicitly
CMD [mysqld, mysql -u "root" -proot < "schema.sql"]
I'm new in docker, and i have two microservices running in two containers and i would like to create simple database for them.
i created it like that:
docker run --net=kajsnetwork -d -e MYSQL_ROOT_PASSWORD='mypassword' -v /storage/mysql1/mysql-datadir:/var/lib/mysql mysql
i enter the container using
docker exec -it containernumber /bin/bash
and then i created database... But when i went to /var/lib/mysql mysql on host i haven't there nothing new - no database which i created from docker file. Did i something wrong ?
I would like to have database with data stored on host, but running in a docker container (is it good solution?) ? How to do it correctly?
You should not have to docker exec to create an instance: the container should already have one.
The doc mentions:
The -v /my/own/datadir:/var/lib/mysql part of the command mounts the /my/own/datadir directory from the underlying host system as /var/lib/mysql inside the container, where MySQL by default will write its data files.
So the order matters.
The docker cmd option -v /storage/mysql1/mysql-datadir:/var/lib/mysql indicates that you are mounting host directory /storage/mysql1/mysql-datadir to /var/lib/mysql as a data volume of the container.
So if you check /var/lib/mysql from the container your should see the same contents as /storage/mysql1/mysql-datadir in your host machine.
More details:
https://docs.docker.com/engine/tutorials/dockervolumes/#mount-a-host-directory-as-a-data-volume