安裝 Ubuntu + LXD 移轉 PVE 內的舊 CT

apt update && apt install -y bridge-utils
mkdir -p /root/netplan-backup
mv /etc/netplan/*.yaml /root/netplan-backup/
cat > /etc/netplan/01-netcfg.yaml << 'EOF'
network:
  version: 2
  renderer: networkd
  ethernets:
    ens18:
      dhcp4: no
      dhcp6: no
  bridges:
    br0:
      interfaces: [ens18]
      addresses: [192.168.1.210/24]
      routes:
        - to: default
          via: 192.168.1.1
          metric: 100  # 明確 metric，避免衝突
      nameservers:
        addresses: [1.1.1.1, 8.8.8.8]
      parameters:
        stp: false
        forward-delay: 0
EOF
netplan generate  # 應無錯誤/警告
netplan apply  # 套用（暫斷網幾秒；用 console 執行以防 SSH 斷）

# 安裝 snapd
apt update
apt install snapd -y

# 安裝 LXD
snap install lxd

# 初始化 LXD
lxd init --auto

# 建立 systemd 服務來自動 mount v1 控制器（持久化，重啟後生效）：
# 建立啟動腳本（mount）
cat > /usr/local/bin/mount-cgroup-v1.sh << 'EOF'
#!/bin/bash
set -e

# 建立目錄（新增 systemd）
mkdir -p /sys/fs/cgroup/{cpu,cpuacct,cpuset,memory,devices,freezer,blkio,net_cls,net_prio,pids,perf_event,systemd}

# Mount v1 控制器（新增 systemd）
mount -t cgroup -o none,name=cpu cpu /sys/fs/cgroup/cpu || true
mount -t cgroup -o none,name=cpuacct cpuacct /sys/fs/cgroup/cpuacct || true
mount -t cgroup -o none,name=cpuset cpuset /sys/fs/cgroup/cpuset || true
mount -t cgroup -o none,name=memory memory /sys/fs/cgroup/memory || true
mount -t cgroup -o none,name=devices devices /sys/fs/cgroup/devices || true
mount -t cgroup -o none,name=freezer freezer /sys/fs/cgroup/freezer || true
mount -t cgroup -o none,name=blkio blkio /sys/fs/cgroup/blkio || true
mount -t cgroup -o none,name=net_cls net_cls /sys/fs/cgroup/net_cls || true
mount -t cgroup -o none,name=net_prio net_prio /sys/fs/cgroup/net_prio || true
mount -t cgroup -o none,name=pids pids /sys/fs/cgroup/pids || true
mount -t cgroup -o none,name=perf_event perf_event /sys/fs/cgroup/perf_event || true
mount -t cgroup -o none,name=systemd systemd /sys/fs/cgroup/systemd || true

echo "cgroup v1 controllers (incl. systemd) mounted successfully."
EOF

# 更新 umount 腳本（新增 systemd）
cat > /usr/local/bin/umount-cgroup-v1.sh << 'EOF'
#!/bin/bash
set -e

umount /sys/fs/cgroup/systemd 2>/dev/null || true
umount /sys/fs/cgroup/perf_event 2>/dev/null || true
umount /sys/fs/cgroup/pids 2>/dev/null || true
umount /sys/fs/cgroup/net_prio 2>/dev/null || true
umount /sys/fs/cgroup/net_cls 2>/dev/null || true
umount /sys/fs/cgroup/blkio 2>/dev/null || true
umount /sys/fs/cgroup/freezer 2>/dev/null || true
umount /sys/fs/cgroup/devices 2>/dev/null || true
umount /sys/fs/cgroup/memory 2>/dev/null || true
umount /sys/fs/cgroup/cpuset 2>/dev/null || true
umount /sys/fs/cgroup/cpuacct 2>/dev/null || true
umount /sys/fs/cgroup/cpu 2>/dev/null || true

echo "cgroup v1 controllers unmounted."
EOF

# 設定權限
chmod +x /usr/local/bin/mount-cgroup-v1.sh /usr/local/bin/umount-cgroup-v1.sh

# 建立單位檔案
cat > /etc/systemd/system/cgroup-v1-legacy.service << 'EOF'
[Unit]
Description=Mount legacy cgroup v1 controllers for LXC containers
After=systemd-remount-fs.service
Before=lxd.service

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/usr/local/bin/mount-cgroup-v1.sh
ExecStop=/usr/local/bin/umount-cgroup-v1.sh

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable --now cgroup-v1-legacy.service
systemctl restart cgroup-v1-legacy.service
systemctl status cgroup-v1-legacy.service

mount | grep cgroup  # 應看到多個 v1 mount 如 /sys/fs/cgroup/cpu 等
cat /proc/cgroups   # 應顯示 v1 控制器可用

vzdump 118 --dumpdir /tmp
scp /tmp/vzdump-lxc-118-2025_11_13-14_03_41.tar [email protected]:/tmp