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--- tips:zfs [2017/01/31 10:16] – [remote replication] scipio
+++ tips:zfs [2023/01/18 11:22] (current) – sscipioni
@@ Line 36: / Line 36: @@
 zpool create lxd /dev/sda4
 </code>
+===== docker =====
+<code>
+systemctl stop docker
+rm -fR /var/lib/docker
+zfs create -o mountpoint=/var/lib/docker rpool/docker-root
+zfs create -o mountpoint=/var/lib/docker/volumes rpool/docker-volumes
+systemctl start docker
+</code>
+/etc/docker/daemon.json
+<code>
+{
+  "default-address-pools":
+  [
+    {"base":"172.16.0.0/21","size":26}
+  ],
+  "storage-driver": "zfs",
+  "features": {
+    "buildkit" : true
+  }
+}
+</code>
 ===== libvirt =====
@@ Line 41: / Line 68: @@
 add ZFS pool to libvirt
 <code>
+# in bionic
+apt install libvirt-daemon-driver-storage-zfs && systemctl restart libvirtd
 # create zfs filesystem
 zfs create rpool/libvirt
-virsh pool-define-as --name zfspool --source-name rpool --type zfs
+virsh pool-define-as --name zfspool --source-name rpool/libvirt --type zfs
 virsh pool-start zfspool
 virsh pool-autostart zfspool
@@ Line 59: / Line 89: @@
 </code>
+add volume to instance
+create file mydevice.xml
+<code>
+<disk type='block' device='disk'>
+      <driver name='qemu' type='raw' cache='none'/>
+      <source dev='/dev/zvol/rpool/libvirt/juju-controller'/>
+      <target dev='vda' bus='virtio'/>
+</disk>
+</code>
+add volume
+<code>
+virsh attach-device --config juju-controller mydevice.xml
+</code>
+===== virtualbox =====
+create volume
+<code bash>
+zfs create -V 50G rpool/win7
+</code>
+create vmdk file that point /dev/zvol/rpool/win7 (/opt/vms/win7.vmdk keeps little)
+<code>
+VBoxManage internalcommands createrawvmdk -filename /opt/vms/win7.vmdk -rawdisk /dev/zvol/rpool/win7
+</code>
+now use /opt/vms/win7.vmdk file as virtual hard disk for virtualbox guest
 ===== tuning =====
@@ Line 70: / Line 129: @@
 <code bash>
 zpool export rpool
-zfs import -R /mnt rpool
+zpool import -R /mnt rpool
+umount everything inside /mnt
 zfs mount rpool/ROOT/ubuntu
@@ Line 98: / Line 160: @@
 destination volume cannot be exists
 <code bash>
-zfs snap storage/cimiteriali@snap1
+zfs send -R storage/cimiteriali@snap1 | pv | ssh zfs1 zfs recv -F -u rpool/cimiteriali
-zfs send storage/cimiteriali@snap1 | pv -s 20G | ssh zfs1 zfs recv rpool/cimiteriali
 # zfs destroy storage/cimiteriali@snap1
 </code>
@@ Line 112: / Line 173: @@
 zfs get volsize,reservation rpool/cimiteriali
 </code>
+==== syncoid ====
+  * https://github.com/jimsalterjrs/sanoid
+<code>
+apt install pv lzop mbuffer
+wget https://raw.githubusercontent.com/jimsalterjrs/sanoid/master/syncoid -O /usr/local/bin/syncoid
+chmod +x /usr/local/bin/syncoid
+</code>
+using from server zfs1 (to server zfs2)
+<code>
+syncoid rpool/share-os root@zfs2:rpool/share-os
+</code>
+===== incremental backup =====
+consider a FS rpool/test
+<code bash>
+FS=rpool/test
+# make a first snapshot
+zfs snapshot rpool/test@snap01
+</code>
+if files are added to FS used space of FS grow
+<code bash>
+sync && zfs list -t all -r $FS
+GROW --->rpool/test      200M   138G   200M  /test
+         rpool/test@01    64K      -   100M  -
+</code>
+if files are changed in FS used space of SNAP grow
+<code bash>
+sync && zfs list -t all -r $FS
+         rpool/test      200M   138G   200M  /test
+GROW --->rpool/test@01   100M      -   100M  -
+</code>
+------> CRYPTOLOCKER grows SNAP
+check crypto locker every day
+<code bash>
+LIMIT_MB=100
+FS=rpool/test
+USED=$(zfs get -Hp used $FS@01 | cut -f3)
+if [ $USED -gt $(($LIMIT_MB*1000*1000)) ]; then
+   echo "CRYPTOLOCKER detected"
+fi
+</code>
+===== swap =====
+<code>
+zfs create -V 4G -b $(getconf PAGESIZE) -o compression=zle \
+      -o logbias=throughput -o sync=always \
+      -o primarycache=metadata -o secondarycache=none \
+      -o com.sun:auto-snapshot=false rpool/swap
+mkswap -f /dev/zvol/rpool/swap
+</code>
+<code>
+echo /dev/zvol/rpool/swap none swap defaults 0 0 >> /etc/fstab
+swapon -av
+</code>