Docker Commands

docker --version
docker info
docker image ls
docker container ls --all
================================================================
Dockerfile
# Use an official Python runtime as a parent image
FROM python:2.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]


#ENV http_proxy host:port
#ENV https_proxy host:port
#
===============================================================

docker build -t friendlyhello .

sudo service docker restart

docker run -p 4000:80 friendlyhello

docker run -d -p 4000:80 friendlyhello


docker login  // https://hub.docker.com/

{docker tag image username/repository:tag}
docker tag friendlyhello gordon/get-started:part2

{docker push username/repository:tag}

=================================================================================









docker build -t friendlyhello .  # Create image using this directory's Dockerfile
docker run -p 4000:80 friendlyhello  # Run "friendlyname" mapping port 4000 to 80
docker run -d -p 4000:80 friendlyhello         # Same thing, but in detached mode
docker container ls                                # List all running containers
docker container ls -a             # List all containers, even those not running
docker container stop            # Gracefully stop the specified container
docker container kill          # Force shutdown of the specified container
docker container rm         # Remove specified container from this machine
docker container rm $(docker container ls -a -q)         # Remove all containers
docker image ls -a                             # List all images on this machine
docker image rm             # Remove specified image from this machine
docker image rm $(docker image ls -a -q)   # Remove all images from this machine
docker login             # Log in this CLI session using your Docker credentials
docker tag username/repository:tag  # Tag for upload to registry
docker push username/repository:tag            # Upload tagged image to registry
docker run username/repository:tag                   # Run image from a registry
docker port static-site

docker swarm init
docker stack ls                                            # List stacks or apps
docker stack deploy -c   # Run the specified Compose file
docker service ls                 # List running services associated with an app
docker service ps                   # List tasks associated with an app
docker inspect                    # Inspect task or container
docker container ls -q                                      # List container IDs
docker stack rm                              # Tear down an application
docker swarm leave --force      # Take down a single node swarm from the manager

docker-machine create --driver virtualbox myvm1 # Create a VM (Mac, Win7, Linux)
docker-machine create -d hyperv --hyperv-virtual-switch "myswitch" myvm1 # Win10
docker-machine env myvm1                # View basic information about your node
docker-machine ssh myvm1 "docker node ls"         # List the nodes in your swarm
docker-machine ssh myvm1 "docker node inspect "        # Inspect a node
docker-machine ssh myvm1 "docker swarm join-token -q worker"   # View join token
docker-machine ssh myvm1   # Open an SSH session with the VM; type "exit" to end
docker node ls                # View nodes in swarm (while logged on to manager)
docker-machine ssh myvm2 "docker swarm leave"  # Make the worker leave the swarm
docker-machine ssh myvm1 "docker swarm leave -f" # Make master leave, kill swarm
docker-machine ls # list VMs, asterisk shows which VM this shell is talking to
docker-machine start myvm1            # Start a VM that is currently not running
docker-machine env myvm1      # show environment variables and command for myvm1
eval $(docker-machine env myvm1)         # Mac command to connect shell to myvm1
& "C:\Program Files\Docker\Docker\Resources\bin\docker-machine.exe" env myvm1 | Invoke-Expression   # Windows command to connect shell to myvm1
docker stack deploy -c   # Deploy an app; command shell must be set to talk to manager (myvm1), uses local Compose file
docker-machine scp docker-compose.yml myvm1:~ # Copy file to node's home dir (only required if you use ssh to connect to manager and deploy the app)
docker-machine ssh myvm1 "docker stack deploy -c "   # Deploy an app using ssh (you must have first copied the Compose file to myvm1)
eval $(docker-machine env -u)     # Disconnect shell from VMs, use native docker
docker-machine stop $(docker-machine ls -q)               # Stop all running VMs
docker-machine rm $(docker-machine ls -q) # Delete all VMs and their disk images





docker pull mysql/mysql-server:tag
docker pull mysql/mysql-server:
shell> docker images
docker run --name=mysql1 -d mysql/mysql-server:tag
shell> docker ps
docker logs mysql1
shell> docker logs mysql1 2>&1 | grep GENERATED
GENERATED ROOT PASSWORD: Axegh3kAJyDLaRuBemecis&EShOs

docker exec -it mysql1 mysql -uroot -p
 ALTER USER 'root'@'localhost' IDENTIFIED BY 'newpassword';

docker stop mysql1
docker start mysql1
docker restart mysql1

shell> docker inspect mysql1
...
 "Mounts": [
            {
                "Type": "volume",
                "Name": "4f2d463cfc4bdd4baebcb098c97d7da3337195ed2c6572bc0b89f7e845d27652",
                "Source": "/var/lib/docker/volumes/4f2d463cfc4bdd4baebcb098c97d7da3337195ed2c6572bc0b89f7e845d27652/_data",
                "Destination": "/var/lib/mysql",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],
...


docker run --name=mysql1 \
--mount type=bind,src=/path-on-host-machine/my.cnf,dst=/etc/my.cnf \
--mount type=bind,src=/path-on-host-machine/datadir,dst=/var/lib/mysql \
-d mysql/mysql-server:tag

Connect to MySQL from an Application in Another Docker Container
docker network create my-custom-net
docker run --name=mysql1 --network=my-custom-net -d mysql/mysql-server
docker exec -it myapp1 mysql --host=mysql1 --user=myuser --password




docker network inspect bridge

#!/bin/bash

# build the flask container
docker build -t prakhar1989/foodtrucks-web .

# create the network
docker network create foodtrucks-net

# start the ES container
docker run -d --name es --net foodtrucks-net -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:6.3.2

# start the flask app container
docker run -d --net foodtrucks-net -p 5000:5000 --name foodtrucks-web prakhar1989/foodtrucks-web




sample
# start from base
FROM ubuntu:14.04
MAINTAINER Prakhar Srivastav

# install system-wide deps for python and node
RUN apt-get -yqq update
RUN apt-get -yqq install python-pip python-dev curl gnupg
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash
RUN apt-get install -yq nodejs

# copy our application code
ADD flask-app /opt/flask-app
WORKDIR /opt/flask-app

# fetch app specific deps
RUN npm install
RUN npm run build
RUN pip install -r requirements.txt

# expose port
EXPOSE 5000

# start app
CMD [ "python", "./app.py" ]



=========================================================
version: "3"
services:
  es:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: es
    environment:
      - discovery.type=single-node
    ports:
      - 9200:9200
    volumes:
      - esdata1:/usr/share/elasticsearch/data
  web:
    image: prakhar1989/foodtrucks-web
    command: python app.py
    depends_on:
      - es
    ports:
      - 5000:5000
    volumes:
      - ./flask-app:/opt/flask-app
volumes:
    esdata1:
      driver: local
 

docker-compose up
docker-compose down -v
docker network ls