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

Swarm is a set of extremely simple tools for managing docker clusters, which makes docker clusters exposed to users as a virtual whole.

Build the environment:

Turn off the firewall and secure linux

[root@localhost ~] # systemctl stop firewalld

[root@localhost ~] # setenforce 0

Modify the hostname separately:

[root@localhost ~] # vi / etc/hostname

Swarm01

Swarm02

Restart and add a bridge card to the network

[root@swarm01 ~] # systemctl restart network

[root@swarm02 ~] # systemctl restart network

[root@swarm01 ~] # vi / etc/yum.repos.d/CentOS-Base.repo / / configure yum sources respectively

[docker-repo]

Name=Docker Repository

Baseurl= https://yum.dockerproject.org/repo/main/centos/7/

Enabled=1

Gpgcheck=1

Gpgkey= https://yum.dockerproject.org/gpg

[base]

Name=centos-$releasever-Base

Baseurl= file:///mnt

Enabled=1

Gpgcheck=0

[root@swarm02 ~] # vi / etc/yum.repos.d/CentOS-Base.repo

[docker-repo]

Name=Docker Repository

Baseurl= https://yum.dockerproject.org/repo/main/centos/7/

Enabled=1

Gpgcheck=1

Gpgkey= https://yum.dockerproject.org/gpg

[base]

Name=centos-$releasever-Base

Baseurl= file:///mnt

Enabled=1

Gpgcheck=0

Download and install docker respectively:

Yum install-y docker-engine

Systemctl enable docker

Systemctl start docker

Modify the listening port of docker

[root@swarm01 ~] # vi / lib/systemd/system/docker.service

Add the following after ExecStart:

-H tcp://0.0.0.0:2375-H unix:///var/run/docker.sock

[root@swarm01 ~] # systemctl daemon-reload / / reload the configuration file

[root@swarm01 ~] # systemctl restart docker / / restart docker

[root@swarm01 ~] # docker pull swarm

[root@swarm01 ~] # docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

Swarm latest ff454b4a0e84 7 months ago 12.7MB

[root@swarm02 ~] # docker pull swarm

[root@swarm02 ~] # docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

Swarm latest ff454b4a0e84 7 months ago 12.7MB / / download swarm successfully

Initialize Swarm

[root@swarm01] # docker swarm init-- advertise-addr 192.168.100.30

After the above command is executed, the machine automatically joins the swarm cluster. This will create a cluster token

Obtain the global unique token as the unique identity of the cluster. This token value will be used later when other nodes are added to the cluster.

View the swarm node

[root@swarm02] # docker swarm join-- token SWMTKN-1-45wi0d159hormsyptmtnve18a1sas6zfo1alxzsk60ow5ii36t-bi167goeagg6tb0yf9dnzgmcv 192.168.100.30VR 2377

After Swarm02 joins the swarm cluster, there are two nodes, and several servers can join the swarm cluster with this token value.

Create a cluster network overlay

[root@swarm01] # docker network create-- driver overlay skynet

Docker network ls view!

[root@swarm01 ~] # docker pull httpd

Deployment test

[root@swarm01 ~] # docker service create-p 80:80-- name webserver-- replicas 4 httpd / / if you want to continue to add services such as nginx, you need to change port 80 and service name

[root@swarm01 ~] # docker service ls / / View the list of services

[root@swarm01 ~] # docker service ps webserver | grep Running / / View the details of service enablement

Visit: http://192.168.100.30/

Http://192.168.100.40/

The whole swarm02 has not downloaded the httpd service.

Restart docker, systemctl restart docker if you can't access it.

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