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zfs_snapshot_send_receive [2017/08/27 13:48]
ian 		zfs_snapshot_send_receive [2020/02/13 22:55] (current)
Line 4: Line 4:
  
 http://www.znapzend.org/ http://www.znapzend.org/
 +
 +1. znapzend is installed as a deb package (systemd service) using: https://github.com/Gregy/znapzend-debian
 +
 +2. Create a shared key for SSH to allow password-less login from source to dest server as the receiver backupuser
 +
 +<note>
 +Do not specify a password on the shared key, just press enter when prompted.
 +</note>
 +
 +<code>
 +ssh-keygen
 +ssh-copy-id -i /root/.ssh/id_rsa.pub root@destserver
 +</code>
 +
 +3. Create the remote ZFS volume to receive the snapshots and delegate permissions to a non-root user.
  
 <note>The ZFS volume of the given name must exist on the remote node <note>The ZFS volume of the given name must exist on the remote node
 <code>*** WARNING: destination 'root@destserver:data/test' does not exist, will be ignored! ***</code></note> <code>*** WARNING: destination 'root@destserver:data/test' does not exist, will be ignored! ***</code></note>
  
-1. znapzend is installed as a deb package (systemd service) using: https://github.com/Gregy/znapzend-debian+<code> 
 +destserver:~# zfs create data/test 
 +</code>
  
-2. Create a shared key for SSH to allow password-less login from source to dest server as root+<note> 
 +'zfs allow' does not yet work with ZFS on Linux < 0.7.0 to allow a non-root destination user
  
 <code> <code>
-ssh-keygen +destserver:~# zfs allow -u backupuser create,receive,rename,mount,send data/test 
-ssh-copy-id -i /root/.ssh/id_rsa.pub root@desterver+ 
 +destserver:~# zfs allow data/test 
 +---- Permissions on data/test ---------------------------------------- 
 +Local+Descendent permissions: 
 +        user backupuser create,mount,receive,rename,send
 </code> </code>
 +</note>
  
 3. Create a snapshot schedule consisting of a local SRC schedule, and the remote DST schedule to send the snapshots. 3. Create a snapshot schedule consisting of a local SRC schedule, and the remote DST schedule to send the snapshots.
Line 22: Line 45:
 Keep snapshots for 1week, with a snapshot every 30 minutes Keep snapshots for 1week, with a snapshot every 30 minutes
 <code> <code>
-# znapzendzetup create --recursive SRC '1week=>30min' data/test DST '1week=>30min' root@destserver:data/test+# znapzendzetup create SRC '1week=>30min' data/test DST '1week=>30min' root@destserver:data/test
 </code> </code>
 </note> </note>
Line 36: Line 59:
 data/test  org.znapzend:tsformat       %Y-%m-%d-%H%M%S                         local data/test  org.znapzend:tsformat       %Y-%m-%d-%H%M%S                         local
 data/test  org.znapzend:pre_znap_cmd   off                                     local data/test  org.znapzend:pre_znap_cmd   off                                     local
-data/test  org.znapzend:dst_0          root@destserver:data/test  local+data/test  org.znapzend:dst_0          root@destserver:data/test               local
 data/test  org.znapzend:mbuffer        off                                     local data/test  org.znapzend:mbuffer        off                                     local
 data/test  org.znapzend:dst_0_plan     1weeks=>30minutes                       local data/test  org.znapzend:dst_0_plan     1weeks=>30minutes                       local
 data/test  org.znapzend:enabled        on                                      local data/test  org.znapzend:enabled        on                                      local
 data/test  org.znapzend:zend_delay     0                                       local data/test  org.znapzend:zend_delay     0                                       local
-data/test  org.znapzend:recursive      on                                      local+data/test  org.znapzend:recursive      off                                     local
 data/test  org.znapzend:mbuffer_size   1G                                      local data/test  org.znapzend:mbuffer_size   1G                                      local
 data/test  org.znapzend:post_znap_cmd  off                                     local data/test  org.znapzend:post_znap_cmd  off                                     local
Line 47: Line 70:
 </code> </code>
  
-Watch the output of the znapzend daemon:+Watch the output of the znapzend daemon for any errors:
 <code> <code>
-:~# journalctl -u znapzend.service -f+:~# journalctl -u znapzend.service -f &
 </code> </code>
  
Line 56: Line 79:
 # zfs list -t snap # zfs list -t snap
 NAME                                 USED  AVAIL  REFER  MOUNTPOINT NAME                                 USED  AVAIL  REFER  MOUNTPOINT
-data/test@2017-08-27-100000             0      -   128K  - +data/test@2017-08-27-110000             0      -   128K  - 
-data/test@2017-08-27-103000             0      -   128K  -+</code> 
 + 
 +<code> 
 +destserver:~# zfs list -t snap 
 +NAME                          USED  AVAIL  REFER  MOUNTPOINT 
 +data/test@2017-08-27-110000      0      -    19K  - 
 +</code> 
 + 
 +<code> 
 +~# znapzendztatz -r data/test 
 +USED    LAST SNAPSHOT       DATASET 
 +85.2K   2017-08-27-110000   data/test 
 +    0   2017-08-27-110000   root@destserver:data/test 
 +</code> 
 + 
 +5. You can see how the files and directories looked at snapshot time by accessing the hidden .zfs directory 
 +<code> 
 +:~# find /data/test/.zfs -type f -ls 
 +              7      1 -rw-r--r--   1 root     root            0 Aug 27 11:08 /data/test/.zfs/snapshot/2017-08-27-113000/a.txt 
 +</code> 
 + 
 +<code> 
 +destserver:~# find /data/test/.zfs -type f -ls 
 +              7      1 -rw-r--r--   1 root     root            0 Aug 27 14:08 /data/test/.zfs/snapshot/2017-08-27-113000/a.txt 
 +</code> 
 + 
 +<code> 
 +:~# zfs diff data/test@2017-08-27-113000 
 +M       /data/test/ 
 +M       /data/test/a.txt 
 ++       /data/test/b.txt 
 +</code> 
 + 
 +<code> 
 +:~# zfs diff data/test@2017-08-27-110000 data/test@2017-08-27-113000 
 +M       /data/test/ 
 ++       /data/test/a.txt
 </code> </code>
  
zfs_snapshot_send_receive.1503856097.txt.gz · Last modified: 2020/02/13 22:55 (external edit)

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