Docker Swarm первый взгляд

Делаю: 15.02.2018

ПО


Файлы для старта виртуальных машин с coreos
https://bitbucket.org/sysadm-ru/native-docker-clustering

Файлы готовил не я. Ну да ладно.


$ cd /tmp
$ git clone https://bitbucket.org/sysadm-ru/native-docker-clustering
$ cd native-docker-clustering
$ vagrant box update
$ vagrant up


$ vagrant status
Current machine states:

core-01                   running (virtualbox)
core-02                   running (virtualbox)
core-03                   running (virtualbox)
core-04                   running (virtualbox)
core-05                   running (virtualbox)
core-06                   running (virtualbox)
core-07                   running (virtualbox)


Работаю с первыми 3 виртуальными машинами, на остальные предлагаю забить.

$ vagrant ssh core-01
$ vagrant ssh core-02
$ vagrant ssh core-03


Делаем:

core-01 - manager1 (172.17.8.101)
core-02 - worker1  (172.17.8.102)
core-03 - worker2  (172.17.8.103)


На всех:

$ docker pull swarm

$ docker run swarm -v
swarm version 1.2.8 (48d86b1)


core-01

$ docker swarm init --advertise-addr <MANAGER-IP>

$ docker swarm init --advertise-addr 172.17.8.101     
Swarm initialized: current node (1j517f9tyh969t51ap4uzknc4) is now a manager.

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

    docker swarm join \
    --token SWMTKN-1-2pz4il4gexlaan2ik825mr5xdxmpllbqxhmhhf6x6z8kvcf889-ekfm7so78lcqgy06eqvanudcg \
    172.17.8.101:2377

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


core-02 core-03

$ docker swarm join \
--token SWMTKN-1-2pz4il4gexlaan2ik825mr5xdxmpllbqxhmhhf6x6z8kvcf889-ekfm7so78lcqgy06eqvanudcg \
172.17.8.101:2377


core-01

$ docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS
jy14pbjj9e6hfm7ltebjg68oy *   core-01             Ready               Active              Leader
5bant3omhyf5pjmft849b70gd     core-02             Ready               Active              
v9k79tqie9oos1x9sytr3vvw3     core-03             Ready               Active   


Create a service


$ docker service create \
  --name=viz \
  --publish=8080:8080/tcp \
  --mount=type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
  dockersamples/visualizer


-- если нужно будет удалить
$ docker service rm viz


$ docker service scale viz=10


$ docker service ps viz
ID                  NAME                IMAGE                             NODE                DESIRED STATE       CURRENT STATE                ERROR               PORTS
ba11rp3bfn9t        viz.1               dockersamples/visualizer:latest   core-02             Running             Running about a minute ago                       
j9tp5lfp930c        viz.2               dockersamples/visualizer:latest   core-01             Running             Running 55 seconds ago                           
t5zpsoshkvg2        viz.3               dockersamples/visualizer:latest   core-02             Running             Running 57 seconds ago                           
nju79l93cdxh        viz.4               dockersamples/visualizer:latest   core-03             Running             Running 33 seconds ago                           
n21y9evs773b        viz.5               dockersamples/visualizer:latest   core-01             Running             Running 55 seconds ago                           
upd0ajc2679m        viz.6               dockersamples/visualizer:latest   core-02             Running             Running 57 seconds ago                           
z7pwn0toygjk        viz.7               dockersamples/visualizer:latest   core-01             Running             Running 56 seconds ago                           
mcfqzprv3kbp        viz.8               dockersamples/visualizer:latest   core-03             Running             Running 33 seconds ago                           
14m0p2dbt6e7        viz.9               dockersamples/visualizer:latest   core-03             Running             Running 33 seconds ago                           
e94x2rbahfit        viz.10              dockersamples/visualizer:latest   core-03             Running             Running 36 seconds ago    


http://172.17.8.101:8080/


Визуализация Docker Swarm


Конечно, такое количество запущенных контейнеров с однотипными задачами, в данном случае, избыточно.