Docker Help

Docker_help.sh

Help : https://devhints.io/

#List local available images

$ docker images


$docker run <image>
  
$docker run -d <image> = run in disconnected / daemon mode
  
$docker run --name="Some Name" = name the running instance
  
$docker start <name> = will restart a closed / exited instance of the image
  
$docker exec -it <name> <command> = run a command within a running container without changing the state of the running container
  
$docker stop <name> = stop a running container by using the name

$docker rm containerid = removes an instance of the container that was run

$docker rm `docker ps -a -q` = remove all stopped containers

$docker rmi image-name = removes the docker image and its dependencies

$docker run -P = will redirect the container's port to a random port on the host machine's user port (port no 32,000+)

$docker run -p 8080:80 = will redirect the container's port 80 to a port 8080 on the host machine's user port 

$docker port <container-name> = will list the port mapping information
  

using the "-v" option mounts the local file system. eg to mount for an nginx on centos

-v /home/user/www:/usr/share/nginx/html  
  
  
$docker login --username=<username>   #Enter password


docker status check 

$ps -ef | grep docker 


#add user to docker group

$sudo usermod -aG docker $USER

$sudo gpasswd -a $USER docker  #  adding user to sudo permissions on docker

$getent group sudo

$getent group docker


Sample Json file :  /etc/docker/daemon.json


   {
   
       "insecure-registries": [ "f7engr090.cg.na.nodegos.com:5000" ],
       
       "dns": [ "11.15.43.57", "10.11.34.67" ],
       
       "storage-driver": "overlay2"
       
   }



List docker process :

$docker ps -a


List Dockers images:

$docker images


Example "jenkins" user docker launch :

$docker run  -u jenkins -it -v ~/.ssh:/home/jenkins/.ssh -w /home/jenkins/workspace local-nodegos-wrlinux:latest bash


Service restart Ubuntu: 

$service docker restart

$sudo systemctl daemon-reload # reload systemd

$sudo systemctl restart docker # now reload dockerd



Start a container in background

$ docker run -d jenkins


Start an interactive container

$ docker run -it ubuntu bash


Export port from a container

$ docker run -p 80:80 -d nginx


Start a named container

$ docker run --name mydb redis


Restart a stopped container

$ docker start mydb


Stop a container

$ docker stop mydb


Add metadata to container

$ docker run -d label=traefik.backend=jenkins jenkins


Build an image from Dockerfile in current directory
$ docker build --tag myimage .


Manage Containers

List running containers

$ docker ps


Force rebuild of Docker image

$ docker build --no-cache .


Convert a container to image

$ docker commit c7337 myimage


Run another process in running container

$ docker exec -it c7337 bash


Show live logs of running daemon container

$ docker logs -f c7337


Show exposed ports of a container

$ docker port c7337


List all containers ( running & stopped )

$ docker ps -a

Delete all stopped containers

$ docker rm $(docker ps --filter status=exited -q)


Create a local volume

$> docker volume create --name myvol


Mounting a volume on container start

$> docker run -v myvol:/data redis


Destroy a volume

$ docker volume rm myvol


List volumes

$ docker volume ls

Create a local network

$ docker network create mynet


Attach a container to a network on start

$ docker run -d --net mynet redis


Connect a running container from a network

$ docker network connect mynet c7337


Disconnect container to a network

$ docker network disconnect mynet c7337


List all containers with a specific label

$ docker ps --filter label=traefik.backend


Inspect containers metadatas

$ docker inspect c7337



Start a container automatically removed on stop

$ docker run --rm ubuntu bash


Query a specific metadata of a running container

$ docker inspect -f '{{ .NetworkSettings.IPAddress }}' c7337


Remove all unused images

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


$ docker-compose up -d         # start containers in background

$ docker-compose kill          # stop containers

$ docker-compose up -d --build # force rebuild of Dockerfiles

$ docker-compose rm            # remove stopped containers

$ docker ps                    # see list of running containers

$ docker exec -ti [NAME] bash # ssh to the container


#tag and publishing

$docker tag <id> buonzz/name:version


docker login

$docker push buonzz/name


delete image

$docker rmi -f <id>


run an image

$docker run yourusername/docker-whale


view logs

$docker logs [OPTIONS] CONTAINER


set the port to expose in host

$docker run -p 3000 my_image


start new container interactively

$ docker container run -it

$ docker-compose up -d         # start containers in background

$ docker-compose kill          # stop containers

$ docker-compose up -d --build # force rebuild of Dockerfiles

$ docker-compose rm            # remove stopped containers

$ docker ps                    # see list of running containers

$ docker exec -ti [NAME] bash # ssh to the container


# tag and publishing

docker tag <id> buonzz/name:version

docker login

docker push buonzz/name


# delete image

docker rmi -f <id>


# run an image

docker run yourusername/docker-name


# view logs

docker logs [OPTIONS] CONTAINER


# set the port to expose in host

docker run -p 3000 my_image


# start new container interactively

docker container run -it