Docker 17.06.0-ce Swarm集群实战(二)

2017-07-29  本文已影响0人  Cyberpunk_ZYM

第二章 初步启动应用

下载dockercoins镜像

根据此地址https://github.com/jpetazzo/orchestration-workshop/tree/master/dockercoins中的docker镜像,在虚拟机(安装有harbor)中提前将镜像下载,并制作所需的服务镜像:

sudo docker pull python:alpine
sudo docker pull ruby:alpine
sudo docker pull redis
sudo docker pull node:4-slim
...
sudo docker images
...
sudo docker-compose build
...
sudo docker images
...
sudo docker push 192.168.0.106/dockercoins/dockercoins_webui:1.0
sudo docker push 192.168.0.106/dockercoins/dockercoins_rng:1.0
sudo docker push 192.168.0.106/dockercoins/dockercoins_hasher:1.0
sudo docker push 192.168.0.106/dockercoins/dockercoins_worker:1.0
sudo docker push 192.168.0.106/common/redis:3.2

在harbor中查看:

创建本地虚拟机

使用docker-machine创建出docker虚拟机node01、node02、node03、node04和node05

sudo docker-machine create \
--driver virtualbox \
--virtualbox-cpu-count "1" \
--virtualbox-disk-size "20000" \
--virtualbox-memory "1536" \
--virtualbox-boot2docker-url "file://$HOME/tool/docker/machine/iso/boot2docker.iso" \
--engine-insecure-registry 192.168.0.106 \
node01
...
node02
...
node03
...
node04
...
node05

说明:
--driver 虚拟机的驱动类型
--virtualbox-cpu-count cpu数量
--virtualbox-disk-size 磁盘大小
--virtualbox-memory 内存大小
--virtualbox-boot2docker-url 虚拟机系统的镜像地址,因网速原因,建议提前下载到本地,再设置成本地地址
--engine-insecure-registry 本地的docker应用镜像仓库地址,即harbor所在的192.168.0.106
更为详尽的说明,请参考官网docker-machine create
使用docker-machine ls查看:

搭建swarm集群

设置node01为swarm的manager

sudo docker-machine ssh node01 "docker swarm init --advertise-addr 192.168.99.100:2377"

查看结果:

sudo docker-machine ssh node01 "docker node ls"

设置其他节点为swarm的worker

sudo docker-machine ssh node02 \
"docker swarm join \
--token SWMTKN-1-3qkohhjezgy21hpsou98idgms6hvpaijkz643fguevzra6s3yy-5avd4fgrnb211hqpylsjxozln \
192.168.99.100:2377"

以此类推,继续添加node03、node04、node05。查看结果:

设置node02、node03为manager
sudo docker-machine ssh node01 "docker node promote node02 node03"

启动应用

编辑应用的配置文件dockercoins.yml

version: "3"
services:
  webui:
    image: 192.168.0.106/dockercoins/dockercoins_webui:1.0
    deploy:
      replicas: 1
      resources:
        limits:
          cpus: "0.2"
          memory: 100M
      restart_policy:
        condition: on-failure
    ports:
      - "8000:80"
    networks:
      - webnet

  hasher:
    image: 192.168.0.106/dockercoins/dockercoins_hasher:1.0
    deploy:
      replicas: 1
      resources:
        limits:
          cpus: "0.2"
          memory: 100M
      restart_policy:
        condition: on-failure
    networks:
      - webnet

  rng:
    image: 192.168.0.106/dockercoins/dockercoins_rng:1.0
    deploy:
      replicas: 1
      resources:
        limits:
          cpus: "0.2"
          memory: 100M
      restart_policy:
        condition: on-failure
    networks:
      - webnet

  worker:
    image: 192.168.0.106/dockercoins/dockercoins_worker:1.0
    deploy:
      replicas: 1
      resources:
        limits:
          cpus: "0.2"
          memory: 100M
      restart_policy:
        condition: on-failure
    networks:
      - webnet

  redis:
    image: 192.168.0.106/common/redis:3.2
    volumes:
      - /data:/data
    deploy:
      placement:
        constraints: [node.hostname==node03]
    networks:
      - webnet
networks:
  webnet:

注意:要预先在node03中设置目录/data

把dockercoins.yml文件发送到node01上:
sudo docker-machine scp dockercoins.yml node01:~

启动dockercoins应用:
sudo docker-machine ssh node01 "docker stack deploy -c dockercoins.yml dockercoins"

sudo docker-machine ssh node01 "docker stack ls"

sudo docker-machine ssh node01 "docker stack ps dockercoins"

sudo docker-machine ssh node01 "docker service ls"

根据上图可知,webui服务在node05上
查看node05的地址:
sudo docker-machine env node05

访问http://192.168.99.104:8000(端口8000在dockercoins.yml已设定)


至此,在swarm集群上的dockercoins应用已被初步启动了。

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