# 更換 Proxmox 叢集網路

## 目標
* 將 proxmox 網段從 `192.168.50.0/24` 更換到 `192.168.61.0/24`


#### 原本網路設定
> p1: 192.168.50.100/24
> p2: 192.168.50.101/24
> p3: 192.168.50.102/24

#### 目標網路設定
> p1: 192.168.61.100/24
> p2: 192.168.61.101/24
> p3: 192.168.61.102/24

## 設定
1. 檢查 corosync 設定檔

$ cat /etc/pve/corosync.conf
logging {
  debug: off
  to_syslog: yes
}

nodelist {
  node {
    name: p1
    nodeid: 1
    quorum_votes: 1
    ring0_addr: 192.168.50.100
  }
  node {
    name: p2
    nodeid: 2
    quorum_votes: 1
    ring0_addr: 192.168.50.101
  }
  node {
    name: p3
    nodeid: 3
    quorum_votes: 1
    ring0_addr: 192.168.50.102
  }
}

quorum {
  provider: corosync_votequorum
}

totem {
  cluster_name: topgun
  config_version: 4
  interface {
    linknumber: 0
  }
  ip_version: ipv4-6
  link_mode: passive
  secauth: on
  version: 2
}

2. 更改 corosync 設定檔
* 當第一台做完設定會同步到所有 node 上

$ cp /etc/pve/corosync.conf /etc/pve/corosync.conf.new

# config_version 一定要往上增加數字，只要比原本數值大就可以，這個非常重要
$ nano /etc/pve/corosync.conf.new
logging {
  debug: off
  to_syslog: yes
}

nodelist {
  node {
    name: p1
    nodeid: 1
    quorum_votes: 1
    ring0_addr: 192.168.61.100        # change
  }
  node {
    name: p2
    nodeid: 2
    quorum_votes: 1
    ring0_addr: 192.168.61.101        # change
  }
  node {
    name: p3
    nodeid: 3
    quorum_votes: 1
    ring0_addr: 192.168.61.102        # change
  }
}

quorum {
  provider: corosync_votequorum
}

totem {
  cluster_name: topgun
  config_version: 5                   # change
  interface {
    linknumber: 0
  }
  ip_version: ipv4-6
  link_mode: passive
  secauth: on
  version: 2
}


$ mv /etc/pve/corosync.conf.new /etc/pve/corosync.conf

3. 更換每一台 Proxmox host `/etc/hosts` & `/etc/network/interfaces`
* 設定 p1

$ nano /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.61.100 p1.example.com p1

$ nano /etc/network/interfaces
auto lo
iface lo inet loopback

iface ens32 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.61.100/24
        gateway 192.168.61.2
        bridge-ports ens32
        bridge-stp off
        bridge-fd 0


source /etc/network/interfaces.d/*

* 重啟服務

$ systemctl restart networking

$ systemctl restart pve-cluster.service

$ systemctl restart corosync.service 

* 設定 p2

$ nano /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.61.101 p2.example.com p2

$ nano /etc/network/interfaces
auto lo
iface lo inet loopback

iface ens32 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.61.101/24
        gateway 192.168.61.2
        bridge-ports ens32
        bridge-stp off
        bridge-fd 0


source /etc/network/interfaces.d/*

* 重啟服務

$ systemctl restart networking

$ systemctl restart pve-cluster.service

$ systemctl restart corosync.service 

* 設定 p3

$ nano /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.61.102 p3.example.com p3

$ nano /etc/network/interfaces
auto lo
iface lo inet loopback

iface ens32 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.61.102/24
        gateway 192.168.61.2
        bridge-ports ens32
        bridge-stp off
        bridge-fd 0


source /etc/network/interfaces.d/*

* 重啟服務

$ systemctl restart networking

$ systemctl restart pve-cluster.service

$ systemctl restart corosync.service 

## 檢查

* 確認已更換到新的網段，並且叢集皆正常


## 參考文件
https://codingpackets.com/blog/proxmox-cluster-change-ip-addresses/

https://pve.proxmox.com/wiki/Separate_Cluster_Network