自建docker swarm体验简单之美
之前用的阿里云容器服务，但由于acsrouting的路由错乱问题，被逼上自建docker swarm的梁山。今天尝试自己搭建docker swarm，竟然轻松搞定，简单的超乎想象。以下是实际搭建操作步骤：
1. 创建集群
# docker swarm init --advertise-addr 10.251.242.231
Swarm initialized: current node (m9dfl7r9wo1e9jxsp3oe5du3x) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join --token xxx 10.251.242.231:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
主：10.251.242.231 是 docker 主机的内网IP地址
2. docker info 查看刚刚创建的集群信息
Swarm: active
NodeID: m9dfl7r9wo1e9jxsp3oe5du3x
Is Manager: true
ClusterID: j01wzizw7gy0ck95p1d7a4pmv
Managers: 1
Nodes: 1
Orchestration:
Task History Retention Limit: 5
3. docker node ls 查看节点信息
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
m9dfl7r9wo1e9jxsp3oe5du3t * swarm-websites-node1 Ready Active Leader
4. 创建用于部署应用容器的网络
# docker network create --driver=overlay --attachable cnblogs
5. 创建用于部署Docker Flow Proxy容器的网络（Docker Flow Proxy支持根据主机名将请求转发至对应的应用容器）
docker network create --driver overlay proxy
6. 查看刚刚创建的网络
# docker network ls
NETWORK ID NAME DRIVER SCOPE
rl96kcw8ytpa cnblogs overlay swarm
61kbxtvnivkx proxy overlay swarm
7. 部署 Docker Flow Proxy stack
7.1 下载 docker-compose-stack.yml 文件
# curl -o docker-compose-stack.yml \
https://raw.githubusercontent.com/\
vfarcic/docker-flow-proxy/master/docker-compose-stack.yml
7.2 部署 stack
# docker stack deploy -c docker-compose-stack.yml proxy
8. 编写示例应用 openapi 的 docker-compose-stack.yml
version: '3.2'
services:
api:
image: open-api:latest
deploy:
replicas: 2
update_config:
delay: 5s
labels:
- com.df.notify=true
- com.df.distribute=true
- com.df.serviceDomain=api.cnblogs.com
- com.df.port=80
networks:
- cnblogs
- proxy
networks:
cnblogs:
external: true
proxy:
external: true
9. 部署示例应用的 stack
docker stack deploy -c docker-compose-stack.yml openapi
10. 部署完成后可以通过 http://api.cnblogs.com 访问运行在 openapi_api service 中的站点
11. 添加机器进集群作为节点
docker swarm join --token xxxxxxxxx IP:2377
12. 将节点提升为manager
docker node promote ID或HOSTNAME
【参考资料】
[*]Getting started with swarm mode
[*]Using Docker Stack To Run Docker Flow Proxy In Swarm Mode
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