"Docker machine" - quickly create a host running docker service @ 20210416

Steamed chicken with vegetables 2021-04-16 15:01:37
docker machine quickly create host


Problem description

stay GitLab CI in , We found a kind of Executor by Docker Machine type . therefore , We're beginning to understand Docker Machine Related content , Learn its functions and usage scenarios , Think about whether it can solve our problems .

This note will be recorded : stay Docker in , Use Dcoker Machine Methods , And how to deal with common problems .

Solution

adopt Docker Machine Tools , Can quickly create and run Docker Host of service . For quick understanding Docker Machine The role of , See the following example :

First step 、 install Docker Machine command

It's a tool , So we need to install the relevant commands ( We Linux Environmental Science ):

# Download command 
base=https://github.com/docker/machine/releases/download/v0.16.0
curl -L $base/docker-machine-$(uname -s)-$(uname -m) > /usr/local/bin/docker-machine
# Authorization to execute 
chmod +x /usr/local/bin/docker-machine
# To configure Bash completion 
base=https://raw.githubusercontent.com/docker/machine/v0.16.0
for i in docker-machine-prompt.bash docker-machine-wrapper.bash docker-machine.bash
do
sudo wget "$base/contrib/completion/bash/${i}" -P /etc/bash_completion.d
done

The second step 、 Use Docker Mainche command

// On first execution , Nothing there?
// After all, it's the first time , We haven't created anything yet
# docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
// Execute the following command , Will be in the local Virtolbox Create virtual machine in
// Running in this virtual machine instance Docker service
# docker-machine create --driver virtualbox default
Running pre-create checks...
Creating machine...
(staging) Copying /Users/ripley/.docker/machine/cache/boot2docker.iso to /Users/ripley/.docker/machine/machines/default/boot2docker.iso...
(staging) Creating VirtualBox VM...
(staging) Creating SSH key...
(staging) Starting the VM...
(staging) Waiting for an IP...
Waiting for machine to be running, this may take a few minutes...
Machine is running, waiting for SSH to be available...
Detecting operating system of created instance...
Detecting the provisioner...
Provisioning with boot2docker...
Copying certs to the local machine directory...
Copying certs to the remote machine...
Setting Docker configuration on the remote daemon...
Checking connection to Docker...
Docker is up and running!
To see how to connect Docker to this machine, run: docker-machine env default
// When we look again , You'll see the instance we created
# docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
default * virtualbox Running tcp://192.168.99.187:2376 v1.9.1
// To access our newly created instance , Environment variable needs to be set
# docker-machine env default
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://172.16.62.130:2376"
export DOCKER_CERT_PATH="/Users/<yourusername>/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
# Run this command to configure your shell:
# eval "$(docker-machine env default)"
// Next , We can use it directly docker command , To create a container in this instance
# docker run busybox echo hello world
Unable to find image 'busybox' locally
Pulling repository busybox
e72ac664f4f0: Download complete
511136ea3c5a: Download complete
df7546f9f060: Download complete
e433a6c5b276: Download complete
hello world

Docker Machine That's the tool .

Of course , except VirtualBox outside , Options --driver virtualbox Can be replaced by --driver vmwarefusion / --driver aliyunecs wait , Reference resources docker.github.io/AVAILABLE_DRIVER_PLUGINS.md page , To quickly deploy in different environments to create runs Docker Virtual machine instance of service .

A summary

As a store of knowledge , At the moment, we don't need to use Docker Machine The scene of the tool .

stay GitLab CI in , Can be configured Docker Machine Realization GitLab Runner Dynamic expansion of nodes . however Docker Machine Can manipulate Docker service , Instead of just running the container on a remote host as we thought , therefore , We can't apply it to GitLab in .

Related articles

「Docker」- Image and warehouse
「Kubernetes」- install cert-manager Components
「Docker」- Update configuration , But there's no need to restart the service
「Kubernetes」- journal
「Kubernetes Objects」- Init Containers( Learning notes )
「Docker」- configure network
「Docker」- View the disk space used by the container

reference

Docker Machine overview | Docker Documentation
docker-machine create | Docker Documentation
Install Docker Machine | Docker Documentation

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https://javamana.com/2021/04/20210416133759045Y.html

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