Benpian is about docker docker machine in The Three Musketeers.

Note: The environment for CentOS7, docker 19.03.

docker docker-machine is one of the official Three Musketeers project, which is a command-line tool. We use docker-machine environment can quickly create a docker. It also supports multiple cloud computing environments, allowing users to install and maintain docker operating environment on multiple platforms.

The figure is a schematic docker-machine, it is connected to a different type of platform is achieved by a corresponding drive, the former comprises a destination time has integrated ⽀ AWS, IBM, Google, and OpenStack, VirtualBox, vSphere other cloud platform hold.

Docker-machine installation

Docker-machine installation on linux only official release from the library directly download the compiled binary files to

base=https://github.com/docker/machine/releases/download/v0.16.0 &&
  curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine &&
  sudo mv /tmp/docker-machine /usr/local/bin/docker-machine

chmod +x /usr/local/bin/docker-machine

After installation is complete, view the version information:

# docker-machine version
docker-machine version 0.16.0, build 702c267f

docker-machine supports command completion, you need to download the file bash machine library

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

Then execute

source /etc/bash_completion.d/docker-machine-prompt.bash

To enable docker-machine shell prompt, add $(__docker_machine_ps1)to PS1 set in ~ / .bashrc.PS1='[\u@\h \W$(__docker_machine_ps1)]\$ '

Use docker-machine

Installation docker

docker-machine installation supports multiple environments, here we introduce several

virtualbox

docker-machine support through virtualbox drive installed and configured docker host, provided that I need to install virtualbox (https://www.virtualbox.org/wiki/Downloads)

docker-machine create --driver virtualbox default

genernic

genernic way can be installed via ssh directly on the remote docker, but before that must first configure ssh authentication

1. Generate Key

# ssh-keygen           
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:V7kl+8c0paW/yGFCA+TOvBoH86MtLdKBBZ432TwlrN0 root@centos1
The key's randomart image is:
+---[RSA 2048]----+
|        ..       |
|     .  oo . .   |
|    . o *o+ + . o|
|     o *+=.E = +.|
|      +oS+ooo o..|
|     . .+.o .. +.|
|      ..o= . o. +|
|     . +*.. + o..|
|      .oo.   o . |
+----[SHA256]-----+

2. Host installation key

# ssh-copy-id [email protected]

As a result the machine can not require a password to log the remote host.

3.genernic installation docker

# docker-machine create --driver generic --generic-ip-address 192.168.10.11 --generic-ssh-key ~/.ssh/id_rsa --generic-ssh-user=root centos2

Note: If you do not docker installed on the host, the waiting time will be longer this process.

4. View Host

# docker-machine ls
NAME      ACTIVE   DRIVER    STATE     URL                        SWARM   DOCKER     ERRORS
centos2   -        generic   Running   tcp://192.168.10.11:2376           v19.03.1

Other platforms

Installation for other platforms are not explained in detail here, if required, can be found https://docs.docker.com/machine.

docker-machine command

docker-machine provides a series of sub-commands corresponding to different functions.

Here are the commands specific usage

active

Format docker-machine active [arg...]. ⽀ hold -timeout， -t "10"option, on behalf of the timeout, the default is 10s. View the current Docker host active. Activation means that the current state of DOCKER_HOST environment variable to point to the host. For example, ⾯ command lists the currently active host dev Host:

# docker-machine ls
NAME      ACTIVE   DRIVER    STATE     URL                        SWARM   DOCKER     ERRORS
centos2   -        generic   Running   tcp://192.168.10.11:2376           v19.03.1

config

Format docker-machine config [OPTIONS] [arg...]. ⽀ hold --swarmparameters, monitor print Swarm cluster information table, ⽽ not Docker information. Check the connection configuration information Docker host. For example, the host dev ⾯ displayed connection information:

# docker-machine config centos2
--tlsverify
--tlscacert="/root/.docker/machine/machines/centos2/ca.pem"
--tlscert="/root/.docker/machine/machines/centos2/cert.pem"
--tlskey="/root/.docker/machine/machines/centos2/key.pem"
-H=tcp://192.168.10.11:2376

create

Format docker-machine create [OPTIONS] [arg...]. Docker ⼀ create a host environment. ⽀ support options include:

--driver, -d "virtualbox": specifies the type of drive;
--engine-install-url "https://get.docker.com": when the installation URL Docker host configuration;
--engine-opt option: to specify the parameters Docker key engine of creation of format;
--engine-insecure-registry option: Docker on the format created to allow access to the engine do not support this warehouses holding registration authentication service specified in the key;
--engine-registry-mirror option: Use designated-registered warehouses mirror;
--engine-label option: Add tags for Docker engine created;
--engine-storage-driver: rear drive type storage;
--engine-env option: Specifies the environment variable;
--swarm: Host Configuration Docker filling with the Swarm cluster;
--swarm-image "swarm: latest": Using Swarm when recorded using a mirror;
--swarm-master: configuring the machine as the master node of the cluster Swarm;
--swarm-discovery: Swarm cluster service discovery mechanism parameters;
--swarm-strategy "spread": Swarm default scheduling policy;
--swarm-opt option: any of the parameters passed to Swarm;
--swarm-host "tcp: //0.0.0.0: 3376": the specified address will listen Swarm master node request;
--swarm-addr: Send Wide-broadcast filling with Swarm cluster service from the specified address.

For example, you can create a Docker ⼀ host virtual machine image with the following command:

# docker-machine create -d virtualbox \
--engine-storage-driver overlay \
--engine-label name=testmachine \
--engine-label year=2018 \
--engine-opt dns=8.8.8.8 \
--engine-env HTTP_PROXY=http://proxy.com:3128 \
--engine-insecure-registry registry.private.com \
mydockermachine

Docker Docker host virtual machine engine created:

Using the overlay type of storage drive; - with name = testmachine year = 2015 and two labels;
8.8.8.8 engines are recorded using the default DNS;
Environment variable to specify the HTTP proxy service http://proxy.com:3128.
Use allowed without verification of registered warehouses registry.private.com.

env

Format docker-machine env [OPTIONS] [arg...]. The monitor is connected to a host environment variables needed. ⽀ support options include:
· -swarm: displayed Swarm cluster configuration;
· -shell: Shell environment ⾯ to specify the default for the current Auto detection;
· -unset, -u: remove the corresponding environment variable;
· - no-proxy: add objects to the host address NO_PROXY environment variable.
For example, the monitor connected to the host default environment variables required:

# docker-machine env  centos2
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.10.11:2376"
export DOCKER_CERT_PATH="/root/.docker/machine/machines/centos2"
export DOCKER_MACHINE_NAME="centos2"
# Run this command to configure your shell: 
# eval $(docker-machine env centos2)

inspect

Format docker-machine inspect [OPTIONS] [arg...]. Json output format to specify details Docker host. ⽀ hold -format, -f option to specify the Go Using the template formatted output.

ip

Gets the Docker host address. For example, the host obtains the address centos2, the following command can use it:

# docker-machine ip centos2
192.168.10.11

kill

Docker directly kill the specified host. Docker specified hosts will be strong ⾏ stops.

ls

Lists all hosts managed. Format docker-machine ls [OPTIONS] [arg...]. It can be --filteroutput only some Docker host, including the name of the filter holder ⽀ regular expressions, the drive type, the Swarm management node name, and status. E.g:

# docker-machine ls --filter state=Running
NAME      ACTIVE   DRIVER    STATE     URL                        SWARM   DOCKER     ERRORS
centos2   -        generic   Running   tcp://192.168.10.11:2376           v19.03.1

⽀ support options include:

--quiet, -q: Off ⽆ reduce output information;
--filter [--filter option - filter option]: matching the filter output only the host;
-timeout, -t "10": Perform command timeout, default is 10s;
-format, -f: Use the specified template Go formatted output.

docker practice seven: docker-machine