docker install and use

install docker from

https://docs.docker.com/install/linux/docker-ce/ubuntu/

change directory containers

first create the folder

mkdir /home/$USER/docker-files/

copy all elements to new folder

sudo rsync -aXS /var/lib/docker/. /home/$USER/docker-files/

create a point mount in fstab

/home/$USER/docker-files/ /var/lib/docker none bind 0 0

Now mount of new configuration without reboot.

mount -a

Enabled autostart dockerd

sudo systemctl enable docker

edit file config service docker

nano /etc/systemd/system/multi-user.target.wants/docker.service

change ExecStart

ExecStart=/usr/bin/dockerd -H unix:// -H tcp://0.0.0.0:2375

reload files systemctl

sudo systemctl daemon-reload

add your user to group docker

sudo usermod -aG docker $USER

ready dockerd auto run now

now check the system to install

docker search ubuntu

now install the server

docker pull ubuntu

now run the server

docker run -i -t ubuntu /bin/bash 

show the containers

docker ps -a

copy the id of you container

example:
CONTAINER ID        IMAGE               COMMAND                 CREATED             STATUS                         PORTS               NAMES
6b1b845eae6a        cirel/ubuntu2       "/bin/bash"             2 minutes ago       Exited (0) 2 minutes ago     


descargar imagenes

sudo docker pull debian:jessie

docker images

docker images

docker commit 6b1b845eae6a cirel/ubuntu2

now check the container change, if you can run again you container use

docker run -it cirel/ubuntu2 /bin/bash

docker -it -d 1483112e529b /bin/bash

if want remove container

docker rm ID-CONTAINER

if want remove image

docker rm ID-IMAGE

remove all containers

docker rm $(docker ps -a -q)

problems with locale in container

apt-get install -y locales

dpkg-reconfigure locales

sed -i 's/^# *\(en_US.UTF-8\)/\1/' /etc/locale.gen && locale-gen

locale-gen en_US.UTF-8

Docker compose

sudo apt-get purge python-pip

sudo wget https://bootstrap.pypa.io/get-pip.py

sudo python get-pip.py

pip uninstall autopep8 pep8

pip install docker-compose

sudo docker-compose up

check files container

docker exec -it container_name bash

docker backup pgsql

docker exec -t your-db-container pg_dumpall -c -U postgres > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

or

docker exec -t your-db-container pg_dump --no-owner --no-acl -U drupal drupal > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

docker restore pgsql

cat your_dump.sql | docker exec -i your-db-container psql -U postgres

docker compose remove container with name image

sudo docker-compose rm postgresql

docker mysql

backup mysql

docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

docker exec -i mysql-5.6-new /usr/bin/mysqldump -u default --password=default --default-character-set=utf8 --all-databases  --routines  > alldb.sql

restore mysql

cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

docker exec -i CONTAINER /usr/bin/mysql --default-character-set=utf8 DATABASE -u default --password=default < /tmp/BACKUP_DATA_BASE

Docker restar and show logs container

DOCKER_CONTAINER="nginx" && sudo docker container restart $DOCKER_CONTAINER && sudo docker container logs -f -t --tail 40 $DOCKER_CONTAINER

Docker list containers running

docker ps

Docker list stats containers running

docker stats

keep running docker in command exec

tail -f /dev/null

docker error memory limit

sudo sysctl -w vm.max_map_count=262144

docker remove logs

sudo find /var/lib/docker/containers/ -type f -name "*.log" -delete

https://www.elastic.co/guide/en/elasticsearch/reference/5.0/vm-max-map-count.html#vm-max-map-count



Fuente: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04

http://alexander.holbreich.org/moving-docker-images-different-partition/