commands.md

Images

List images

docker images

Remove images

docker rmi {image_name/id}

docker rmi -f {image_name/id}

Remove dangling (none) images

docker rmi $(docker images -f "dangling=true" -q)

Container

Create container

docker run -d {image:tag}

-d => stands for de-attach mode

Re-Name

docker rename {current_container_name} {new_container_name}

List containers

docker ps -l

docker ps -a

Remove container

docker rm {Container Id}

Use force `-f` To remove running container

docker rm -f {container_id}

Start contaier

docker start {}

Name the container

docker run -d --name {container name} -p 80:80 nginx

Run container (restart always)

docker run --restart always --detach --name auto-start-redis redis

Expose Port

To expose port use -p-

docker run -d -p {host_os_port}:{docker_port} {image:tag}
docker run -d -p 9090:80 nginx:alpine

Statistics of container (CPU/RAM/...)

docker stats {container_id}

Limit the memory usage of container

docker run -d --name {container_name} --memory "200mb" nginx:alpine

Limit the CPU usage

[0,3] - means use oly 0 and 3. [0-3] means use 0 to 3

docker run -d --name {container_image} --memory "200mb" --cpuset-cpus 0-3 ngnix:alpine

Create image from the container

docker commit {container_id} {imageName}:{tag_name}

Temporary container

Once exit from bash container will get destroy.

docker run --rm -ti ubuntu bash

Inspect container

docker inspect {container_id}

RUN

Use to install application

FROM ubuntu
RUN apt-get install git

CMD

Command to execute

From ubuntu
RUN apt-get install nginx
ngnixctl -DFOREGROUND

The process must be foregroud, otherwise the docker will exit. If there is no foreground process then use the following command ti (terminal) to keep alive for debug

docker run -d -ti --name {Container_name} -p {PORT:PORT} {image}

Login/Access Container

docker exec -ti {containerName} bash

Copy files from host to docker container

docker cp {filename} {container_name}:/{destination}

docker cp thirumal.txt nginx1:/var/www/

Copy files from docker container to host

docker cp {container_name}:/{source path}  /{destination}

docker cp nginx1:/var/www/thirumal.txt .