caot/docker linux

## docker linux
1. add USER-ID to the group docker
usermod -aG docker ${USER}

2. find out what groups you belong to
groups $USER

# gpasswd --delete root docker  # Removing user root from group docker

docker stop `docker ps | grep {IMAGE NAME} | awk '{print $1}'`

docker ps -aq
docker stop $(docker ps -q)
docker system prune -a   # can fix "no space left on device"

docker rm $(docker ps -aq)      # Remove all containers
docker rm -f $(docker ps -a -q)
docker rmi $(docker images -q)  # Remove all images

# Then use docker export to export the filesystem to tar:
docker export $(docker ps -lq) | tar tf -
# The docker ps -lq there means "give me the id of the most recent docker cotnainer".
# You could replace that with an explicit container name or id.

docker run --rm image-name ls -lrt /

--------
# Delete all stopped containers
docker rm $( docker ps -q -f status=exited)
# Delete all dangling (unused) images
docker rmi $( docker images -q -f dangling=true)
--------
xargs with --no-run-if-empty is even better as it does cleanly handle the case when there is nothing to be removed.
--------
# Delete all stopped containers
docker ps -q -f status=exited | xargs --no-run-if-empty docker rm
# Delete all dangling (unused) images
docker images -q -f dangling=true | xargs --no-run-if-empty docker rmi

docker exec -it $container /bin/bash -c "export TERM=xterm; exec bash"

docker container ls -a
docker start <container id>

# get rid of all untagged images
docker rmi -f $(docker images | grep "<none>" | awk "{print \$3}")

docker-machine create -d virtualbox node-1

$ docker swarm init   --advertise-addr $(docker-machine ip)
Swarm initialized: current node (mc13mvd41lgvx3amzihbt82g5) is now a manager.
To add a worker to this swarm, run the following command:
    docker swarm join --token SWMTKN-1-16njjbj7b5lgtofpf07o4game4lmexez1dlyvdn74pldbgnhsf-5tgexd722dkb0cn3vot48a3qm 192.168.99.100:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

cpuset - confine processes to processor and memory node subsets

## gunicorn
Deploying Gunicorn
	1. add USER-ID to the group docker
	usermod -aG docker ${USER}

	2. find out what groups you belong to
	groups $USER

	# gpasswd --delete root docker # Removing user root from group docker

	docker stop `docker ps \| grep {IMAGE NAME} \| awk '{print $1}'`

	docker ps -aq
	docker stop $(docker ps -q)
	docker system prune -a # can fix "no space left on device"

	docker rm $(docker ps -aq) # Remove all containers
	docker rm -f $(docker ps -a -q)
	docker rmi $(docker images -q) # Remove all images

	# Then use docker export to export the filesystem to tar:
	docker export $(docker ps -lq) \| tar tf -
	# The docker ps -lq there means "give me the id of the most recent docker cotnainer".
	# You could replace that with an explicit container name or id.

	docker run --rm image-name ls -lrt /

	--------
	# Delete all stopped containers
	docker rm $( docker ps -q -f status=exited)
	# Delete all dangling (unused) images
	docker rmi $( docker images -q -f dangling=true)
	--------
	xargs with --no-run-if-empty is even better as it does cleanly handle the case when there is nothing to be removed.
	--------
	# Delete all stopped containers
	docker ps -q -f status=exited \| xargs --no-run-if-empty docker rm
	# Delete all dangling (unused) images
	docker images -q -f dangling=true \| xargs --no-run-if-empty docker rmi

	docker exec -it $container /bin/bash -c "export TERM=xterm; exec bash"

	docker container ls -a
	docker start <container id>

	# get rid of all untagged images
	docker rmi -f $(docker images \| grep "<none>" \| awk "{print \$3}")

	docker-machine create -d virtualbox node-1

	$ docker swarm init --advertise-addr $(docker-machine ip)
	Swarm initialized: current node (mc13mvd41lgvx3amzihbt82g5) is now a manager.
	To add a worker to this swarm, run the following command:
	docker swarm join --token SWMTKN-1-16njjbj7b5lgtofpf07o4game4lmexez1dlyvdn74pldbgnhsf-5tgexd722dkb0cn3vot48a3qm 192.168.99.100:2377
	To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

	cpuset - confine processes to processor and memory node subsets