Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops, data center VMs, or the cloud.
Docker is now moby project for advanced containerzation movement
https://blog.docker.com/2017/04/introducing-the-moby-project/
- Install docket toolbox with kinematic https://www.docker.com/products/docker-toolbox
- after installation in some machines virtualization need to enabled follow below link https://blogs.technet.microsoft.com/canitpro/2015/09/08/step-by-step-enabling-hyper-v-for-use-on-windows-10/
- Now start docker console
Use below shell script to install docker on any ubuntu machines
wget -nv -O - https://get.docker.com/ | sh
After installation add current user to docker group
sudo groupadd docker
sudo usermod -aG docker ${USER}
su -s ${USER}
Verify docker by pulling hello-world image
docker run hello-world
For more troubleshooting in linux refer this link
- docker run
- docker start <name|id>
- docker stop <name|id>
- docker ps [-a include stopped containers] - to list all docker containers
- docker rm <name|id>
- docker build -t /<app_name> .
- docker-machine ssh default -- Used to SSH docker
- docker-machine env default -- get environment commands for your new VM
- docker-machine regenerate-certs default
-https://coderwall.com/p/siqnjg/disable-tls-on-boot2docker -Create docker machine with TLS false docker-machine create -d virtualbox --engine-opt tlsverify=false node1
- Download docker toolbox
https://www.docker.com/products/docker-toolbox
- Create username in docker.com
- To dock node js app https://nodejs.org/en/docs/guides/nodejs-docker-webapp/
- To search images
docker search --filter=stars=3 hello
docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' f5f5384dd63b
- To build a docker image first we need to create a file "Docker"
FROM <image-name>:<tag>
RUN <command>
COPY <src> <dest>
EXPOSE <port>
CMD -a arga value -b argb-value
FROM nginx:1.11-alpine
COPY index.html /usr/share/nginx/html/index.html
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]
FROM node:boron
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
COPY package.json /usr/src/app/
RUN npm install
COPY . /usr/src/app
EXPOSE 8080
CMD [ "npm", "start" ]
# Build and running image into container
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After creation of docker file run command to take a build of image
docker build -t <any-name> . -
To verify run below command this will list image with given name
docker images REPOSITORY TAG IMAGE ID CREATED SIZE my-nodejs-app latest 50bdaca3105f 11 hours ago 667 MB node boron e0fb852254e6 5 days ago 659 MB jenkins latest ee06af673de2 2 weeks ago 713 MB kitematic/hello-world-nginx latest 03b4557ad7b9 20 months ago 7.91 MB -
Below command launch the built image is
docker run -d --name my-running-app -p 3000:3000 my-nodejs-app sudo docker run -d --name hostapp -p 8082:4000 hostapp docker run --name prometheus -d -p 127.0.0.1:9090:9090 nameThis binds port 4000 of the container to port 8082 on 127.0.0.1(ip) of the host machine. The Docker User Guide explains in detail how to manipulate ports in Docker.
-
After running above command go to tcp url with port 3000
192.168.99.100:32768 or curl 192.168.99.100:32768 -
To verify build is present in container
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES df289bf2768a my-nodejs-app:latest "npm start" 2 minutes ago Up 2 minutes 0.0.0.0:32768->7899/tcp my-nodejs-app-2
- Automatically restart crashed containers by specifying a restart policy
Even though our application crashes continues to exit with an error, Docker is continuously restarting the container every time it exits.
$ sudo docker run -d —name hello-app —restart always hello-app -
To resolve this do following steps , Goto Virtualbox > Preferences -> Network -> Host-only Network and remove all adapters listed.
-
Remove existing docker machine
$ docker-machine rm default
-
Create new virtual machine
docker-machine create --driver virtualbox default -
Create new virtual machine
docker-machine create --driver virtualbox default -
Set machine as
eval "$(docker-machine env default)"-
docker-machine regenerate-certs default
- docker-machine restart default
- eval $(docker-machine env default)
- docker-machine ls
-
docker daemon configuration https://docs.docker.com/engine/admin/#troubleshoot-the-daemon
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- Ship yard https://github.com/shipyard/shipyard
- Portainer https://github.com/portainer/portainer
- https://docs.docker.com/engine/installation/linux/ubuntu/#uninstall-docker
- https://docs.docker.com/engine/admin/
- https://docs.docker.com/engine/security/certificates/#understanding-the-configuration
- https://docs.docker.com/engine/reference/commandline/dockerd/
- docker ps -aq - List all container id
- docker stop $(docker ps -aq) Stop all running containers
- docker rm $(docker ps -aq) Remove all containers
- docker rmi $(docker images -q) Remove all images
- docker container ls --all - List all container details
- docker update --restart=always (container-id) - Run docker container automatically
- docker exec it /bin/bash
- docker run -it image_name sh
- docker swarm init
- docker node ls
- sudo apt-get purge docker-ce
- sudo rm -rf /var/lib/docker