Proxmox VE

疑難雜症

LXC Container Permission denied 備份失敗
錯誤訊息 : LXC Container 備份時出現下列錯誤訊息，備份失敗 

 INFO: create storage snapshot 'vzdump' INFO: creating vzdump archive '/mnt/pve/xxxxxx/dump/vzdump-lxc-401-2024_06_08-00_19_50.tar.zst' INFO: tar: /mnt/pve/xxxxxx/dump/vzdump-lxc-401-2024_06_08-00_19_50.tmp: Cannot open: Permission denied INFO: tar: Error is not recoverable: exiting now 

 問題成因 : 

 只有在 非特權容器 (Unpriviledged container) 才會發生，如果是 特權容器 (Priviledged container) 則可以順利備份。這兩種模式在 vzdump 程式備份時使用的身份不一樣，前者會使用大於 100000 的 UID，而後者直接用 root 執行。 

 

 解決方式 : 修改 pve /etc/vzdump.conf 

 mkdir /temp && mkdir /temp/vzdump

vim /etc/vzdump.conf 

 

 # vzdump default settings 

 tmpdir: /temp/vzdump #dumpdir: DIR #storage: STORAGE_ID #mode: snapshot|suspend|stop #bwlimit: KBPS #performance: [max-workers=N][,pbs-entries-max=N] #ionice: PRI #lockwait: MINUTES #stopwait: MINUTES #stdexcludes: BOOLEAN #mailto: ADDRESSLIST #prune-backups: keep-INTERVAL=N[,...] #script: FILENAME #exclude-path: PATHLIST #pigz: N #notes-template: {{guestname}} 

 

 存檔後即可 資料來源 : 

 節省工具箱 Jason Tools http://blog.jason.tools/2021/07/proxmox-ve-vzdump-lxc-fail.html

Storage 相關

Ceph指令
#建立Crush Rule 

 ceph osd crush rule create-replicated rule-nvme default host nvme ceph osd crush rule create-replicated rule-hdd default host hdd ceph osd crush rule rm replicated_rule 

   

 為HDD Pool建立SSD快取 

 ceph osd tier add Ceph_Pool Cache ceph osd tier cache-mode Cache writeback ceph osd tier set-overlay Ceph_Pool Cache ceph osd pool set Cache hit_set_type bloom #ceph osd pool set Cache hit_set_count 12 #ceph osd pool set Cache hit_set_period 14400 

 ceph osd pool set Cache target_max_bytes xxxxxx ceph osd pool set Cache target_max_objects xxxxxx ceph osd pool set Cache min_read_recency_for_promote 2 ceph osd pool set Cache min_write_recency_for_promote 2 

 ceph osd pool set Cache cache_target_dirty_ratio 0.4 ceph osd pool set Cache cache_target_dirty_high_ratio 0.6 ceph osd pool set Cache cache_target_full_ratio 0.8 ceph osd pool set Cache cache_min_flush_age 600 ceph osd pool set Cache cache_min_evict_age 1800 

 #remove Cache Pool 

 ceph osd tier cache-mode Cache readproxy radow -p Cache ls radow -p Cache cache-flush-evict-all ceph osd tire remove-overlay Ceph_Pool ceph osd tire remove Ceph_Pool Cache ceph delete Cache Cache --yes-i-really-really-mean-it 

   

 #移除以前是Ceph LVM的Disk Lable 

 ceph-volume lvm zap /dev/sdX --destroy 

   

 #確認Ceph 狀態 

 ceph -s 

 ceph osd pool stats 

 #關閉ceph cluster準備 

 ceph osd set noout ceph osd set nobackfill ceph osd set norecover 

 #ceph cluster開機後執行 

 ceph osd unset noout ceph osd unset nobackfill ceph osd unset norecover

ZFS指令
設定ZFS使用SSD做Cache與Log 

 zpool add ZFS_Pool cache << /dev/xxxx >> 

 zpool add ZFS_Pool log << /dev/xxxx >> 

 

 顯示ZFS相關資訊 

 zfs list 

 

 zpool list 

 

 zpool status

GuestOS相關

Guest OS安裝Qemu Guest Agent
各版本OS安裝Qemu Guest Agent的方式 

 

 Windows 2012以後 

 最新的VirtIO ISO中有 Qemu-GA可以安裝 

 https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso 

 

 Windows 2008 R2 / 7 

 最後能安裝的版本為 100.0 https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-qemu-ga/qemu-ga-win-100.0.0.0-3.el7ev/ 

 注意 !! 只要安裝了比100更新的版本會造成安裝錯誤，並無法再安裝任何版本的Qemu-GA，請勿必注意 !! 

 

 Windows 2003(含) 以前 

 無任何Qemu-GA可以安裝 

 

 CentOS/Redhat/Rocky 

 dnf install qemu-guest-agent -y systemctl enable qemu-guest-agent systemctl start qemu-guest-agent 

 

 Ubuntu / Debian 

 apt update && apt -y install qemu-guest-agent systemctl enable qemu-guest-agent systemctl start qemu-guest-agent