linux:zfs

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linux:zfs [2024/04/17 03:47] – adminlinux:zfs [2025/02/05 12:49] (current) – [ZFS - notification] admin
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 ====== Linux ZFS ====== ====== Linux ZFS ======
 +https://lepkov.ru/zfs-cheatsheet/ backup https://habr.com/ru/companies/macloud/articles/547056/ \\
 <https://denisbondar.github.io/post/zfs-manual-rus/> - manual <https://xakep.ru/2014/07/08/zfs-at-home/#toc07.> old one\\ <https://denisbondar.github.io/post/zfs-manual-rus/> - manual <https://xakep.ru/2014/07/08/zfs-at-home/#toc07.> old one\\
 <code BASH> <code BASH>
 +# zfs pools and mount points
 +tree /dev/zvol/
 +/dev/zvol/
 +├── rpool
 +    ├── data
 +    │   ├── vm-100-disk-1 -> ../../../zd0
 +    │   └── vm-100-disk-1-part1 -> ../../../zd0p1
 +    └── swap -> ../../zd16
 +    
 +zfs get all rpool/data/subvol-111-disk-1  | grep com
 +zfs set compression=off rpool/data/subvol-111-disk-1
 +    
 +zfs get compressratio
 +NAME                          PROPERTY       VALUE  SOURCE
 +rpool                         compressratio  1.07x  -
 +rpool/ROOT                    compressratio  1.78x  -
 +rpool/ROOT/pve-1              compressratio  1.78x  -
 +rpool/data                    compressratio  1.06x  -
 +rpool/data/subvol-110-disk-0  compressratio  1.77x  -
 +
 +
 # start trim operation # start trim operation
  zpool trim rpool  zpool trim rpool
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  zpool status -t rpool  zpool status -t rpool
 </code> </code>
 +
 +===== ZFS move - recompress =====
 +++++ Recompress zfs|
 +<code BASH>
 +#You basically have to rewrite every block of every file.
 +
 +#A reasonably safe and simple way to do it is like this, however this
 +#assumes you have sufficient space.
 +
 +#First set the new value for compression.
 +
 +zfs set compression=on tank/fs
 +
 +#Send a snapshot to a temporary name
 +
 +zfs snapshot tank/***@1
 +zfs send -R tank/***@1 | zfs recv -vFd tank/fs-recompressed
 +
 +#Mark the original as readonly and send anything newly written
 +#since the 'zfs send' above started.
 +
 +zfs set readonly=on tank/fs
 +zfs snapshot tank/***@2
 +zfs send -i tank/***@1 tank/***@2 | zfs recv -v tank/fs-recompressed
 +
 +#Now delete the original and rename the newone into its place.
 +
 +zfs delete tank/fs
 +zfs rename tank/fs-recompressed tank/fs
 +
 +#Note that the new tank/fs will have all the the snapshots of
 +#the original as well since -R was used with the zfs send.
 +</code>
 +++++
 +
 +
 +===== ZFS - notification =====
 +++++ telegram notification zfs|
 +<code BASH>
 + # https://github.com/leovp/telegram_notifications
 +nano /etc/zfs/zed.d/zed-telegram.sh
 +
 +#!/bin/bash
 +TELEGRAM_BOT_TOKEN="righttoken" # put your token here
 +TELEGRAM_CHAT_ID="chatid" # your chat_id for sending notification
 +
 +subject="$1"
 +details="$2"
 +
 +MESSAGE="🚨 ZFS Alert on $(hostname) 🚨
 +Event: $subject
 +Details:
 +$details"
 +
 +curl -s -X POST "https://api.telegram.org/bot$TELEGRAM_BOT_TOKEN/sendMessage" \
 +     -d "chat_id=$TELEGRAM_CHAT_ID" \
 +     -d "text=$MESSAGE"
 +
 +chmod +x /etc/zfs/zed.d/zed-telegram.sh
 +
 +# zed-functions.sh Modified zed_notify function
 +zed_notify()
 +{
 +    zed_notify_email "${subject}" "${pathname}"; rv=$?
 +    [ "${rv}" -eq 0 ] && num_success=$((num_success + 1))
 +    [ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1))
 +
 +    # Execute external Telegram script if it exists
 +    if [ -x "/etc/zfs/zed.d/zed-telegram.sh" ]; then
 +        /etc/zfs/zed.d/zed-telegram.sh "${subject}" "$(cat "${pathname}")"; rv=$?
 +        [ "${rv}" -eq 0 ] && num_success=$((num_success + 1))
 +        [ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1))
 +    fi
 +}
 +</code>
 +++++
 +
 +
 +
 +
 +===== ZFS backup =====
 +
 +<code bash>
 +# create file  20 gb
 +dd if=/dev/zero of=/mnt/sdb3/zpool_test bs=1G count=20
 +# create pool on file 
 +zpool create test /mnt/sdb3/zpool_test
 +
 +
 +# send data replication to local  system 
 + zfs send -vR rpool@snap1 | zfs receive  test -F
 +
 +# send data of zpool to file 
 +zfs send -vR rpool@snap1 > /mnt/pve/backup/zfs-pve-rpool-20240624.backup
 +# recieve 
 +zfs receive rpool < /mnt/pve/backup/zfs-pve-rpool-20240624.backup
 +
 +
 +zpool attach rpool nvme-512GB_SSD_NJM358R015419P70GX-part3 ata-SPCC_Solid_State_Disk_AA230918S351201018-part3
 +zpool remove rpool /mnt/sdb3/zpool_mirror1_1
 +</code>
 +
 +===== ZFS monitoring =====
 +https://blog.roberthallam.org/2022/09/monitoring-zfs-with-influxdb-grafana-publishing-and-reflection-part-5/ \\
 +https://github.com/richardelling/zpool_influxdb \\
 +
  
  
  
  • linux/zfs.1713325647.txt.gz
  • Last modified: 2024/04/17 03:47
  • by admin