Working with Docker-machine
When working with containerized applications, important to be able to easily deploy them in the cloud, not only running them locally using Docker for Mac/Windows or from a Linux box locally.
The tool to be able to create a remote VM easily and manage those containers is called docker- machine.
Create a docker machine
– Azure
This will create a virtual machine on Azure and install docker engine on it.
#!/usr/bin/env bash
set -e
MACHINE_NAME="VIRTUAL MACHINE NAME"
RESOURCE_GROUP="RESOURCE GROUP NAME"
SUBSCRIPTION="YOUR AZURE SUBSCRIPTION ID"
AZURE_LOCATION="eastus"
AZURE_VNET_NAME="VNET NAME"
docker-machine create --driver azure
--azure-availability-set="MACHINE_NAME-as"
--azure-subscription-id="${SUBSCRIPTION}"
--azure-location "${AZURE_LOCATION}"
--azure-open-port 80
--azure-open-port 443
--azure-size "${AZURE_MACHINE_SIZE}"
--azure-subnet "${AZURE_VNET_NAME}-subnet"
--azure-vnet "${AZURE_VNET_NAME}"
--azure-resource-group "${RESOURCE_GROUP}"
${MACHINE_NAME}
VERY IMPORTANT:
docker-machine rm <machine-name>
This command will DELETE the Azure virtual machine and all related resources from your subscription! Use it with care.
– VirtualBox
This will create a virtual machine on your local VirtualBox instance and install docker engine on it.
#!/usr/bin/env bash
set -e
MACHINE_NAME="MACHINE NAME"
docker-machine create --driver virtualbox ${MACHINE_NAME}
Generic
This will use the public identification key in order to connect to an existing machine (virtual or not) and install docker engine on it.
NOTE: This driver does not yet allow you to restart/shutdown the system.
#!/usr/bin/env bash
set -e
MACHINE_IP="MACHINE IP"
MACHINE_NAME="MACHINE NAME"
SSH_USER="MACHINE USERNAME"
SSH_PUBLIC_KEY="MACHINE USERNAME PUBLIC KEY PATH"
# If you did an ssh-copy-id to the machine: ~/.ssh/id_rsa
docker-machine create --driver generic
--generic-ip-address=${MACHINE_IP}
--generic-ssh-key ${SSH_PUBLIC_KEY}
--generic-ssh-user ${SSH_USER}
${MACHINE_NAME}
What esle is in – docker machine
Get a list of available machines:
docker-machine ls
NOTE: We’ll suppose the docker-machine is created, reachable and named demo-machine
Here is a simple docker-compose.yml example:
version: '2' services: web: image: dockercloud/hello-world:latest ports: - "80:80"
Deploy containers locally
Start this hello world docker-compose locally:
docker-compose up -d
You can curl it locally and see the content of the index.html page:
curl localhost:80
Now stop and delete the created container of the locally started docker-compose:
docker-compose down
Deploy containers to a remote host
Let’s do the same thing but on the remote demo-machine.
Change the local docker environment variables to the demo-machine ones:
eval $(docker-machine env demo-machine)
You’re now targeting demo-machine when using any docker commands. To validate which docker-machine you point to, use this command:
$ docker-machine active demo-machine
Start the same hello world docker-compose defined locally:
docker-compose up -d
Try to curl locally:
$ curl localhost:80 curl: (7) Failed to connect to localhost port 80: Connection refused
The docker commands are not run locally, they are run on the docker-machine we just configured! You must use the IP of the docker-machine itself as follow:
curl $(docker-machine ip demo-machine):80
SSH
Once the machine is created, it’s really easy to ssh into it because the SSH certificates are generated on the machine and kept locally:
docker-machine ssh demo-machine
Copy files to/from the machine
You can use SCP command to send/receive files to/from the machine.
Here is how to copy ~/localfile.txt into the home folder of the demo-machine
docker-machine scp ~/localfile.txt demo-machine:~/
Here is how to copy ~/remote.txt from the home folder of the demo-machine to the local home folder:
docker-machine scp demo-machine:~/removefile.txt ~/
Cleaning up the local docker environment
If you want to go back to your local instance:
eval $(docker-machine env -u)
To validate:
$ docker-machine active No active host found
Needs Cleaning
docker volume list // volumes
docker container list
docker container list -a // Show switched off containers
docker ps
docker ps -a
docker create -v /db_datka –name db_datka postgres /bin/true
docker container run -d –volumes-from db_datka –name db2 postgres
docker exec -it db2 /bin/bash
docker start db2
docker start db_datka
docker exec -it db2 /bin/bash
docker container run -d db_datka
docker start -d db_datka
docker start db_datka
docker container run -d –volumes-from db_datka –name db2 postgres
docker start db2
docker volume create –name db_datka
docker volume list
docker start db2
docker container run -d -v db_datka:/var/lib/data postgres
docker container run -it –rm -p 80:8080 python
docker image list
docker container run -it –name my_container_ubuntu ubuntu:16.04 bash
docker container run -it –rm -p 90:8080 python
docker container run -it –volumes-from db_datka –rm -p 90:8080 python
docker container run -it –volumes-from db_datka –name my_container_ubuntu ubuntu:16.04 bash
docker rm my_container_ubuntu
docker container run -it –volumes-from db_datka –name my_container_ubuntu ubuntu:16.04 bash
docker rm my_container_ubuntu
docker container run -it –volumes-from db_datka:/var/www/db_datka –name my_container_ubuntu ubuntu:16.04 bash
docker container run -it –volumes-from db_datka –name my_container_ubuntu ubuntu:16.04 bash
clea
docker container run -d –name bd -e MYSQL_ROOT_PASSWORD=minha mysql
docker container run -d -p 91:80 –name appatest –link bd tutum/apache-php
docker exec -it appatest /bin/bash
docker container exec -it appatest ping db
docker container exec -it appatest ping bd
docker exec -it appatest /bin/bash
docker exec -it appatest ping bd
docker network create –driver bridge isolated_nw
docker network list
docker container run -itd –net isolated_nw alpine sh
docker container exec -it stoic_shaw /bin/bash
docker exec -it stoic_shaw /bin/bash
docker exec -it 1d5ded2e565f /bin/bash
docker exec -it 1d5ded2e565f /sh
docker exec -it 1d5ded2e565f sh
docker network inspect isolated_nw
which docker-compose
base=https://github.com/docker/machine/releases/download/v0.16.0 &&\n curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine &&\n sudo mv /tmp/docker-machine /usr/local/bin/docker-machine &&\n chmod +x /usr/local/bin/docker-machine
docker-machine version
docker-machine use
base=https://raw.githubusercontent.com/docker/machine/v0.16.0
for i in docker-machine-prompt-bash docker-machine-wrapper.bash docker-machine.bash\ndo\nsudo wget “$base/contrib/completion/bash/${i}” -P /etc/bash_completion.d\ndone
sudo vim ~/.zshrc
base=https://raw.githubusercontent.com/docker/machine/v0.16.0\nfor i in docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash\ndo\n sudo wget “$base/contrib/completion/bash/${i}” -P /etc/bash_completion.d\ndone
man docker-manifest
docker-machine version
docker-machine
docker-machine ls
docker-machine create –driver=virtualbox vbox-test
docker-engine ls
docker-engine list
docker-machine ls
docker-machine ss
docker-machine version
docker-machine ssh vbox-test
docker-machine stop vbox-test
docker-machine create –driver=virutalbox –virtualbox-disk-size 30000 teste-virtualbox
docker-machine create –driver=virtualbox –virtualbox-disk-size 30000 teste-virtualbox
docker-machine env teste-virtualbox
docker machine ls
docker-machine ls
cd .docker/machine/machines/teste-virtualbox/
cd teste-virtualbox
eval $(docker-machine env teste-virtualbox)
docker-machine ls
docker-machine ssh teste-virtualbox
docker-machine stop teste-virtualbox
docker machine rm teste-virtualbox
docker system prune
docker-machine ls
docker-machine start teste-virtualbox
docker-machine env
eval $(docker-machine env teste-virtualbox)
docker run busybox echo hello world
docker-machine stop teste-virtualbox
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