1 介绍

minio 有多种搭建方式，minio笔记01–部署与测试minio已经介绍了单机上搭建测试集群和常见使用方式，本文将进一步介绍如何基于swarm 搭建多机集群。

2 初始化swarm集群

初始化 master 节点
master节点执行init，初始化集群
```
# docker swarm init
```

添加 worker节点：
在work节点执行join，加入集群

在每个work上依次执行该命令：
# docker swarm join --token SWMTKN-1-61sdyxdby3ofx0s3p4x44hmyahfrcvijcxf7v2fgbhf3yd007c-5d5lt1vhkr28aw4koith8ya8j 192.168.2.131:237

集群节点初始状态：

新建测试服务

# docker service create --name nginx --network host nginx:1.19.6 
扩容到9个副本：
# docker service scale nginx=4 -d
默认情况下master节点也是worker，因此也会部署服务；但是可以通过drain是master只充当管理节点，不部署服务：
# docker node update --availability drain kmaster
kmaster

# docker node ls # 此时状态为Drain，master节点上的nginx飘到其它节点上了。
ID                            HOSTNAME                          STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION
x6krw762e277z3cg9jcty17rh *   kmaster    Ready     Drain          Leader           20.10.1
cv2qe94em477zz5kx92a9qt1m     knode01    Ready     Active                          20.10.1

测试完毕，删除服务，nginx服务
# docker service rm nginx 

笔者此处刚刚好4个节点，因此需要设置master节点可用；线上环境可以专门用3个低配机器当作master，不部署其它服务。
# docker node update --availability active kmaster

3 搭建minio集群

创建secret_key 和 access_ke

echo "minio" | docker secret create access_key -
echo "minio123" | docker secret create secret_key -

对节点打标签，以将minio实例调度到不同节点上

docker node update --label-add minio1=true x6krw762e277z3cg9jcty17rh
docker node update --label-add minio2=true cv2qe94em477zz5kx92a9qt1m
docker node update --label-add minio3=true utp02b0firo331snlz3jvgexy
docker node update --label-add minio4=true jl0wocdk31hik8xlgkovaoz44
注意：打标签必须使用node的ID来标识节点，否则会失败

依次在4个节点创建/home/minio/data 目录

# adduser --home /home/minio minio
# su - minio
$ mkdir /home/minio/data

下载并修改配置文件

# wget https://raw.githubusercontent.com/minio/minio/master/docs/orchestration/docker-swarm/docker-compose-secrets.yaml
# vim docker-compose-secrets.yaml
version: '3.7'

services:
  minio1:
    image: minio/minio:RELEASE.2021-01-16T02-19-44Z
    hostname: minio1
    volumes:
      - /home/minio/data:/export
    ports:
      - "9001:9000"
    networks:
      - minio_distributed
    deploy:
      restart_policy:
        delay: 10s
        max_attempts: 10
        window: 60s
      placement:
        constraints:
          - node.labels.minio1==true
    command: server http://minio{
      
      1...4}/export
    secrets:
      - secret_key
      - access_key
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
      interval: 30s
      timeout: 20s
      retries: 3

  minio2:
    image: minio/minio:RELEASE.2021-01-16T02-19-44Z
    hostname: minio2
    volumes:
      - /home/minio/data:/export
    ports:
      - "9002:9000"
    networks:
      - minio_distributed
    deploy:
      restart_policy:
        delay: 10s
        max_attempts: 10
        window: 60s
      placement:
        constraints:
          - node.labels.minio2==true
    command: server http://minio{
      
      1...4}/export
    secrets:
      - secret_key
      - access_key
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
      interval: 30s
      timeout: 20s
      retries: 3

  minio3:
    image: minio/minio:RELEASE.2021-01-16T02-19-44Z
    hostname: minio3
    volumes:
      - /home/minio/data:/export
    ports:
      - "9003:9000"
    networks:
      - minio_distributed
    deploy:
      restart_policy:
        delay: 10s
        max_attempts: 10
        window: 60s
      placement:
        constraints:
          - node.labels.minio3==true
    command: server http://minio{
      
      1...4}/export
    secrets:
      - secret_key
      - access_key
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
      interval: 30s
      timeout: 20s
      retries: 3

  minio4:
    image: minio/minio:RELEASE.2021-01-16T02-19-44Z
    hostname: minio4
    volumes:
      - /home/minio/data:/export
    ports:
      - "9004:9000"
    networks:
      - minio_distributed
    deploy:
      restart_policy:
        delay: 10s
        max_attempts: 10
        window: 60s
      placement:
        constraints:
          - node.labels.minio4==true
    command: server http://minio{
      
      1...4}/export
    secrets:
      - secret_key
      - access_key
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
      interval: 30s
      timeout: 20s
      retries: 3

networks:
  minio_distributed:
    driver: overlay

secrets:
  secret_key:
    external: true
  access_key:
    external: true

启动集群

# docker stack deploy --compose-file=docker-compose-secrets.yaml minio_stack
Creating network minio_stack_minio_distributed
Creating service minio_stack_minio2
Creating service minio_stack_minio3
Creating service minio_stack_minio4
Creating service minio_stack_minio1

服务创建成功后如下：在这里插入图片描述

在master节点添加集群信息

# mc alias set minio http://localhost:9001 minio minio123
Added `minio` successfully
# mc mb test01
Bucket created successfully `test01`.
# mc ls minio 
[2021-01-22 17:00:33 CST]     0B test01/

删除集群

在master上删除minio_stack
# docker stack rm minio_stack
在每个work节点执行清除卷的功能
# docker volume prune

minio 集群信息：
在这里插入图片描述

访问minio集群：
http://ip:9001/minio/ 在这里插入图片描述

4 说明

软件环境
笔者系统为ubuntu18.04
docker 20.10.1
minio镜像：minio/minio:RELEASE.2021-01-16T02-19-44Z

minio笔记02--基于swarm搭建minio集群

minio笔记02--基于swarm搭建minio集群

1 介绍

2 初始化swarm集群

3 搭建minio集群

4 说明

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