Proxmox VE（PVE） 7.X 升级到 8.0

【温馨提醒】

❉大版本的系统更新会有更新失败的风险，更新前你要考虑清楚：能否承受更新失败带来的后果？以及更新系统后虚拟机能否顺利启动？

❉生产环境用机不建议升级更新！生产环境用机不建议升级更新！生产环境用机不建议升级更新！

❉根据PVE官网的【升级说明】，在升级到PVE8.0之前，需要先更新到PVE7.4-15。

❉在正式操作之前，必须把虚拟机全部关机，并取消所有虚拟机的“自动启动”设置。有重要数据的话强烈建议先备份！

【升级步骤】

修改/etc/vim/vimrc.tiny
```
set nocompatible
set backspace=2
```

依次输入以下命令（每次复制一行，到PVE的Shell里面粘贴，按回车执行），目的是替换源以及把PVE版本更新到7.4-15版本；

rm -rf /etc/apt/sources.list.d/pve-install-repo.list
echo "deb https://enterprise.proxmox.com/debian/pve Bullseye pve-enterprise" > /etc/apt/sources.list.d/pve-enterprise.list
wget https://mirrors.ustc.edu.cn/proxmox/debian/proxmox-release-bullseye.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
echo "deb https://mirrors.ustc.edu.cn/proxmox/debian/pve bullseye pve-no-subscription" > /etc/apt/sources.list.d/pve-no-subscription.list
echo "deb https://mirrors.ustc.edu.cn/proxmox/debian/ceph-pacific bullseye main" > /etc/apt/sources.list.d/ceph.list
sed -i.bak "s#http://download.proxmox.com/debian#https://mirrors.ustc.edu.cn/proxmox/debian#g" /usr/share/perl5/PVE/CLI/pveceph.pm
sed -i.bak "s#ftp.debian.org/debian#mirrors.aliyun.com/debian#g" /etc/apt/sources.list
sed -i "s#security.debian.org#mirrors.aliyun.com/debian-security#g" /etc/apt/sources.list
echo "deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription" >> /etc/apt/sources.list

修改/etc/apt/sources.list

deb https://mirrors.aliyun.com/debian bullseye main co://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free

deb http://mirrors.aliyun.com/debian bullseye-updates main contrib

# security updates
deb http://mirrors.aliyun.com/debian-security bullseye-security main contrib
deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription
deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription

# 添加清华源
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free

编辑pve企业源：

mv /etc/apt/sources.list.d/pve-enterprise.list /etc/apt/sources.list.d/pve-enterprise.list.bak
# 在末尾添加免费的存储库
echo "deb http://security.debian.org/debian-security bullseye-security main contrib" >> /etc/apt/sources.list
echo "deb https://mirrors.tuna.tsinghua.edu.cn/proxmox/debian bullseye pve-no-subscription" >> /etc/apt/sources.list.d/pve-enterprise.list

执行更新
```
apt update && apt dist-upgrade -y
```
更新中，耐心等待；
当命令全部运行结束后，会回到“root@pve:~#”这样的命令行状态，点PVE菜单上的重启键，重启一次；
重启完成再进入到Shell状态下，此时可以看到系统版本已经变成7.4-15了；
输入命令pve7to8回车，检查一下是否符合升级要求；
还好只有一个警告项，然后FAILUSER这一项的数字为0，证明可以升级；

= SUMMARY =

TOTAL:    29
PASSED:   23
SKIPPED:  5
WARNINGS: 1
FAILUSER: 0

ATTENTION: Please check the output for detailed information!

复制下面三行命令到PVE的Shell里面粘贴，按回车执行；

sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list
echo "deb https://enterprise.proxmox.com/debian/pve bookworm pve-enterprise" > /etc/apt/sources.list.d/pve-enterprise.list
echo "deb http://download.proxmox.com/debian/ceph-quincy bookworm no-subscription" > /etc/apt/sources.list.d/ceph.list

输入apt update回车；
如果出现“Failed to fetch ******** 401 Unauthorized”这个错误；

复制下面命令到PVE的Shell里面粘贴，按回车执行；

echo "#deb https://enterprise.proxmox.com/debian/pve bullseye pve-enterprise" > /etc/apt/sources.list.d/pve-enterprise.list

再次输入命令apt update回车，这次就不会报错了；
输入命令apt dist-upgrade -y回车，开始升级PVE8.0；
升级过程中会弹出这些界面，需要我们手动确认，无需选择，全部直接按回车就行了；
当命令全部运行结束后，会回到root@pve:~#这样的命令行状态，这样就更新成功了；
不需要重启，直接把电脑浏览器关掉，重新登录进入PVE，会看到版本已经变成8.0.3了；
在Shell状态下输入apt autoremove -y回车，并输入y回车，自动清理本次升级更新产生的临时文件；
至此，升级工作全部完成！

Proxmox VE（PVE） 7.X 升级到 8.0

参考文档