35. docker swarm dockerStack 部署 投票应用

1. 编写 docker-compose.yml

# docker-compose.yml

version: "3"

services:

redis:

image: redis:alpine

ports:

- "6379"

networks:

- frontend

deploy:

replicas: 2

update_config:

parallelism: 2

delay: 10s

restart_policy:

condition: on-failure

db:

image: postgres:9.4

volumes:

- db-data:/var/lib/postgresql/data

networks:

- backend

deploy:

placement:

constraints: [node.role == manager]

vote:

image: dockersamples/examplevotingapp_vote:before

ports:

- 5000:80

networks:

- frontend

depends_on:

- redis

deploy:

replicas: 2

update_config:

parallelism: 2

restart_policy:

condition: on-failure

result:

image: dockersamples/examplevotingapp_result:before

ports:

- 5001:80

networks:

- backend

depends_on:

- db

deploy:

replicas: 1

update_config:

parallelism: 2

delay: 10s

restart_policy:

condition: on-failure

worker:

image: dockersamples/examplevotingapp_worker

networks:

- frontend

- backend

deploy:

mode: replicated

replicas: 1

labels: [APP=VOTING]

restart_policy:

condition: on-failure

delay: 10s

max_attempts: 3

window: 120s

placement:

constraints: [node.role == manager]

visualizer:

image: dockersamples/visualizer:stable

ports:

- "8080:8080"

stop_grace_period: 1m30s

volumes:

- "/var/run/docker.sock:/var/run/docker.sock"

deploy:

placement:

constraints: [node.role == manager]

networks:

frontend:

backend:

volumes:

db-data:

2. 启动service  并  查看 service 的状态

　　docker stack deploy vote -c=docker-compose.yml

　　docker stack ls

　　docker stack services vote

　　docker stack ps vote

3. 对 vote_vote service 进行拓展

　　docker service stack scale vote_vote=3

4. 访问

　　访问 192.168.205.10:5000　　进行投票

　　访问 192.168.205.10:5001　　查看投票情况

　  访问 192.168.205.10:8080　　查看容器 部署情况