Docker Swarm 官方教程部分实践.

准备

• 49.233.14.19 manager

• 49.232.2.215 worker

• 49.193.125.218 worker

• 大聪明是我没跑了,　折腾了半天虚拟机, 最后买了三台腾讯服务器...按时间/流量买的, 钱没白花(才5毛钱),　学到了:)

官方流程

| docker swarm init       | Initialize a swarm                    |
| ----------------------- | ------------------------------------- |
| docker swarm join       | Join a swarm as a node and/or manager |
| docker swarm join-token | Manage join tokens                    |
| docker swarm leave      | Leave the swarm                       |
| docker swarm unlock     | Unlock swarm                          |
| docker swarm unlock-key | Manage the unlock key                 |
| docker swarm update     | Update the swarm                      |

init

• 初始化 (node/manager, join)

sudo docker swarm init --advertise-addr 192.168.0.108
Swarm initialized: current node (fotvc7m73dar1t0p48gflmcg1) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-595cs5j33r4j7vuwgu45c9f9ayvmxvllfa4h1ap6r5zq5n0uf8-et6d1c656lce4raotegtkyucb 192.168.0.108:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

• 查看docker swarm信息 (clusterID)

docker info

Swarm: active
  NodeID: fotvc7m73dar1t0p48gflmcg1
  Is Manager: true
  ClusterID: b18jkvkfkv1vndp4k5peom2et
  Managers: 1
  Nodes: 1
  Default Address Pool: 10.0.0.0/8  
  SubnetSize: 24
  Data Path Port: 4789
  Orchestration:
   Task History Retention Limit: 5

join

1 manager 2 worker

 docker swarm join --token SWMTKN-1-595cs5j33r4j7vuwgu45c9f9ayvmxvllfa4h1ap6r5zq5n0uf8-et6d1c656lce4raotegtkyucb 192.168.0.108:2377

ubuntu@VM-16-7-ubuntu:~$ docker node ls
ID                            HOSTNAME         STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
wvm63vim2zz89gc84s3hx0xsb     VM-0-5-ubuntu    Ready     Active                          20.10.7
o4iy3kqfbr0c31grvktewhoy5     VM-0-6-ubuntu    Ready     Active                          20.10.7
ox88eqv22abu2grslu1we2edc *   VM-16-7-ubuntu   Ready     Active         Leader           20.10.8

service

服务创建及扩缩容.

docker service create --name redis --replicas=5 redis:3.0.6

ubuntu@VM-16-7-ubuntu:~$ docker service ps redis
ID             NAME      IMAGE         NODE             DESIRED STATE   CURRENT STATE           ERROR     PORTS
n207mmo0p9kj   redis.1   redis:3.0.6   VM-0-5-ubuntu    Running         Running 4 minutes ago             
5vbp2n1yzkqu   redis.2   redis:3.0.6   VM-0-6-ubuntu    Running         Running 4 minutes ago             
pbkbkvlt37v1   redis.3   redis:3.0.6   VM-16-7-ubuntu   Running         Running 5 minutes ago             
qttp0jimvaae   redis.4   redis:3.0.6   VM-0-5-ubuntu    Running         Running 4 minutes ago             
mezxg72e4vmq   redis.5   redis:3.0.6   VM-16-7-ubuntu   Running         Running 5 minutes ago             
ubuntu@VM-16-7-ubuntu:~$ docker service update --replicas=3 redis 
redis
overall progress: 3 out of 3 tasks 
1/3: running   [==================================================>] 
2/3: running   [==================================================>] 
3/3: running   [==================================================>] 
verify: Service converged 
ubuntu@VM-16-7-ubuntu:~$ docker service ps redis
ID             NAME      IMAGE         NODE             DESIRED STATE   CURRENT STATE           ERROR     PORTS
n207mmo0p9kj   redis.1   redis:3.0.6   VM-0-5-ubuntu    Running         Running 7 minutes ago             
5vbp2n1yzkqu   redis.2   redis:3.0.6   VM-0-6-ubuntu    Running         Running 7 minutes ago             
pbkbkvlt37v1   redis.3   redis:3.0.6   VM-16-7-ubuntu   Running         Running 8 minutes ago