平台云基石-CoreOS之集群篇(无需互联网)

      首先按照《平台云基石-CoreOS之离线安装篇(无需互联网)》安装三台CoreOS机器(按照CoreOS官方的说法做集群至少需要三台机器)。

      官方文档中关于集群的配置需要在cloud-config.yaml中配置discovery,而我的实验环境没有外网。

#cloud-config

coreos:
  etcd:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new
    discovery: https://discovery.etcd.io/<token>
    # multi-region and multi-cloud deployments need to use $public_ipv4
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start

 解决方案1、搭建自己的Discovery Endpoint(我没解决)

https://github.com/coreos/discovery.etcd.io 下载本地部署。我部署访问显示不能生成token,放弃尝试,有兴趣的朋友可以尝试下,期待你的解决。

解决方案2、手工启动etcd(有问题)

登录coreos1

ssh [email protected]

执行如下代码 

etcd -name="coreos1" -addr="192.168.1.104:4001" -peer-addr="192.168.1.104:7001"  -data-dir="/home/core/etcd"

登录coreos2

ssh [email protected]

 执行如下代码 

etcd -name="coreos2" -addr="192.168.1.105:4001" -peer-addr="192.168.1.105:7001" -peers="192.168.1.104:7001" -data-dir="/home/core/etcd"

登录coreos3

ssh [email protected]

 执行如下代码

etcd -name="coreos3" -addr="192.168.1.106:4001" -peer-addr="192.168.1.106:7001" -peers="192.168.1.104:7001,192.168.1.105:7001" -data-dir="/home/core/etcd"

测试集群

新开窗口登录coreos1

ssh [email protected]

 输入

fleetctl list-machines

 得到

core@coreos1 ~ $ fleetctl list-machines
MACHINE         IP              METADATA
79a6a4fe...     192.168.1.103   -
d049e2ca...     192.168.1.106   -
dcbf31c5...     192.168.1.105   -

问题

1、etcd不能后台运行

按照上面的etcd命令执行,当关闭客户端的时候,etcd就关闭了,随之集群就没有了,尝试nohup无效。

解决方案3:使用cloud-config.yaml(用这个吧)

单个机器按照《平台云基石-CoreOS之离线安装篇(无需互联网)》,配置按照如下做修改。完美解决!此处要格外小心yaml文件的格式缩进、空格、tab等等,若失败多检查文件。

第一台机器

为主节点,配置如下

cloud-config-104.yaml

#cloud-config

hostname: coreos1

coreos:  
  etcd:    
    addr: 192.168.1.104:4001
    peer-addr: 192.168.1.104:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: static.network
      content: |
        [Match]
        Name=enp3s0

        [Network]
        Address=192.168.1.104/24
        Gateway=192.168.1.254
        DNS=192.168.1.254	
users:  
  - name: core
    ssh-authorized-keys: 
      - ssh-rsa #你的公钥

  - groups:
      - sudo
      - docker

 第二台机器

cloud-config-105.yaml

#cloud-config

hostname: coreos2

coreos:  
  etcd:    
    peers: 192.168.1.104:7001
    addr: 192.168.1.105:4001
    peer-addr: 192.168.1.105:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: static.network
      content: |
        [Match]
        Name=enp3s0

        [Network]
        Address=192.168.1.105/24
        Gateway=192.168.1.254
        DNS=192.168.1.254	
users:  
  - name: core
    ssh-authorized-keys: 
      - ssh-rsa #你的公钥

  - groups:
      - sudo
      - docker

 第三台机器

 cloud-config-106.yaml

#cloud-config

hostname: coreos3

coreos:  
  etcd:    
    peers: 192.168.1.104:7001
    addr: 192.168.1.106:4001
    peer-addr: 192.168.1.106:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: static.network
      content: |
        [Match]
        Name=enp3s0

        [Network]
        Address=192.168.1.106/24
        Gateway=192.168.1.254
        DNS=192.168.1.254	
users:  
  - name: core
    ssh-authorized-keys: 
      - ssh-rsa  #你的公钥
  - groups:
      - sudo
      - docker

 测试

fleetctl list-machines

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