Shulou(Shulou.com)06/02 Report--

Docker swarm is a docker host management software, and there are K8s and mesos as similar container management software. After docker 10.15, docker does not need to be installed separately.

Https://docs.docker.com/engine/swarm/services/

VirtualBox runs 3 virtual machines

Host list

Swarm01 192.168.0.127

Swarm02 192.168.0.128

Swarm03 192.168.0.129

Install docker

$curl-fsSL get.docker.com-o get-docker.sh

$sudo sh get-docker.sh-mirror Aliyun

# $sudo sh get-docker.sh-- mirror AzureChinaCloud

Sudo systemctl start docker

Sudo systemctl enable docker

Native 3 Nic, broadcast on enp0s3 192.168.0.127 bridge Nic enp0s8

Docker swarm init-- advertise-addr 192.168.0.127

Password for work joining

Docker swarm join-- token SWMTKN-1-0wlbnf7ezi6d39j7m0sv9912ikzf13f10jgk384ttiuj6ovy88-4sjlkdp9ul3fe353b0iq0q56c 192.168.0.127VR 2377

Docker node ls

Three machines that have joined the cluster can be found.

Set up a hello service

Docker search alpine

Docker pull registry.docker-cn.com/library/alpine

Docker service create-replicas 1-name hello busybox

Mao, registry is gone?

Nginx should have it.

Docker service create-name my_web nginx

Docker service ls

Create a task

Docker service create-name helloworld alpine ping www.baidu.com

Docker service ls

Nginx service plus one port

Docker service update-publish-add 80 my_web

Docker service scale my_web=3

It's okay to rollback if you make a mistake.

Docker service update-replicas=5 my_web

Docker service update-rollback my_web

192.168.0.127-1293 servers can access nginx's public network NAT port 3000 on port 30000.

Where did the port of 30000 come from? let me update it.

Docker service update\

-- publish-add published=80,target=80\

My_web

Node port 80 can access birds.

Docker network ls

There are two kinds of network. Bridge is accessed externally, and overlay is the communication network within the container.

Docker network create-d overlay-- attachable swarm_test

Add swarm communication network card

Create a network when creating a service

Docker service create\

-- replicas 3\

-- network swarm_test\

-- name my_web2\

Nginx

Compare the differences between the two services

Docker service inspect my_web

Docker service inspect my_web2

The network is different.

Other docker services commands

Https://docs.docker.com/engine/reference/commandline/service_update/

Docker service create

Create a new service

Docker service inspect

Display detailed information on one or more services

Docker service logs

Fetch the logs of a service or task

Docker service ls

List services

Docker service ps

List the tasks of one or more services

Docker service rm

Remove one or more services

Docker service rollback

Revert changes to a service's configuration

Docker service scale

Scale one or multiple replicated services

Docker service update

Update a service

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