docker run -v mounts data volumes abnormally, and the container status is always restarting

Problems:

After adding the -v parameter to docker run, the container will always be in the restarting state. Removing the -v parameter will allow it to run normally.

Find the problem:

Use docker logs 'containerId'

This containerId is the containerId returned after docker run

As you can see, it is a permission denied issue.

Solving the problem:

Add parameters when running docker: add --privileged=true

For example:

docker run -dit -e MYSQL_ROOT_PASSWORD=123456 --name saasdev-mysql --restart always -v /home/data/mysql:/var/lib/mysql --privileged=true -p 3308:3306 mysql:5.6

The problem was successfully solved and the container started normally

A little explanation:

--privileged=true

With this parameter, the root in the container has real root permissions.

Otherwise, the root in the container has only the permissions of an ordinary user outside.

A container started with privileged can see many devices on the host and can mount them.

It even allows you to start a docker container within a docker container

Supplement: docker --restart=always parameter docker restarts the container automatically

When you add the parameter --restart=always when creating a container, the container will automatically start when Docker is restarted.

Directions:

docker container update --restart=always container name

The operation examples are as follows:

[root@localhost mnt]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
46cdfc60b7a6 nginx "nginx -g 'daemon ..." About a minute ago Up 42 seconds 80/tcp n3
79d55a734c26 nginx "nginx -g 'daemon ..." About a minute ago Up 42 seconds 80/tcp n2
f7b2206c019d nginx "nginx -g 'daemon ..." About a minute ago Up 46 seconds 80/tcp n1
[root@localhost mnt]# docker container update --restart=always n1
n1
[root@localhost mnt]# systemctl restart docker 
[root@localhost mnt]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
46cdfc60b7a6 nginx "nginx -g 'daemon ..." 2 minutes ago Exited (0) 5 seconds ago n3
79d55a734c26 nginx "nginx -g 'daemon ..." 2 minutes ago Exited (0) 5 seconds ago n2
f7b2206c019d nginx "nginx -g 'daemon ..." 2 minutes ago Up 2 seconds 80/tcp n1
 

The above is my personal experience. I hope it can give you a reference. I also hope that you will support 123WORDPRESS.COM. If there are any mistakes or incomplete considerations, please feel free to correct me.