[OpenIndiana-discuss] ZFS Rollback Question

Sašo Kiselkov skiselkov.ml at gmail.com
Sat Mar 9 00:02:22 UTC 2013


The root file system of a zone is not kept in the zonepath but in
zonepath/ROOT/zbe - look for that filesystem to snapshot/rollback, not
the zonepath filesystem itself (which is just an empty container). Your
snapshot listing below shows that.

--
Saso

On 03/08/2013 11:58 PM, DormitionSkete at hotmail.com wrote:
> I decided to try out the zfs rollback feature today.  I halted my tomcat zone, and took a zfs snapshot of it like this:
> 
> 
> myadmin at baptist.ds:~# zoneadm -z tomcat halt
> myadmin at baptist.ds:~# zoneadm list -cv
>   ID NAME             STATUS     PATH                           BRAND    IP    
>    0 global           running    /                              ipkg     shared
>    1 routerb2         running    /zones/routerb2                ipkg     excl  
>    4 webphp4          running    /zones/webphp4                 ipkg     excl  
>    6 mysql            running    /zones/mysql                   ipkg     excl  
>   12 dovecot2         running    /zones/dovecot2                ipkg     excl  
>   13 mail             running    /zones/mail                    ipkg     excl  
>   14 stamps           running    /zones/stamps                  ipkg     excl  
>    - zone1            installed  /zones/zone1                   ipkg     excl  
>    - tomcat           installed  /zones/tomcat                  ipkg     excl  
>    - dovecot          installed  /zones/dovecot                 ipkg     excl  
>    - zone2            installed  /zones/zone2                   ipkg     excl  
> myadmin at baptist.ds:~# zfs snapshot rpool/zones/tomcat at 2013-0308-1553
> myadmin at baptist.ds:~# zoneadm -z tomcat boot
> 
> 
> Then I logged into the zone with "zlogin -C tomcat".  I did some work which created a bunch of files in /usr and /var. I didn't like how it worked out, so I logged out of the zone, exited the console, and then halted the zone.
> 
> I did a zfs rollback to the snapshot I had just taken previously.
> 
> 
> myadmin at baptist.ds:~# zoneadm -z tomcat halt
> myadmin at baptist.ds:~# zfs rollback rpool/zones/tomcat at 2013-0308-1553
> cannot rollback to 'rpool/zones/tomcat at 2013-0308-1553': more recent snapshots exist
> use '-r' to force deletion of the following snapshots:
> rpool/zones/tomcat at zfs-auto-snap_frequent-2013-03-08-16h01
> myadmin at baptist.ds:~# zfs rollback -r rpool/zones/tomcat at 2013-0308-1553
> myadmin at baptist.ds:~# zoneadm -z tomcat boot
> myadmin at baptist.ds:~# 
> 
> 
> I booted the zone, and logged back into it.  All of those files I had created, that I didn't like, were still there.
> 
> The zfs-auto-snap_frequent that I thought was supposed to be deleted still remains, too.
> 
> 
> myadmin at baptist.ds:~# zfs list -t snapshot | grep tomcat
> rpool/zones/tomcat at zfs-auto-snap_hourly-2013-02-20-21h45                           19K      -    32K  -
> rpool/zones/tomcat at zfs-auto-snap_weekly-2013-02-27-13h45                           18K      -    33K  -
> rpool/zones/tomcat at zfs-auto-snap_weekly-2013-03-06-13h45                           18K      -    33K  -
> rpool/zones/tomcat at zfs-auto-snap_daily-2013-03-08-13h46                              0      -    33K  -
> rpool/zones/tomcat at zfs-auto-snap_hourly-2013-03-08-15h46                             0      -    33K  -
> rpool/zones/tomcat at 2013-0308-1553                                                    0      -    33K  -
> rpool/zones/tomcat at zfs-auto-snap_frequent-2013-03-08-16h31                           0      -    33K  -
> rpool/zones/tomcat/ROOT at zfs-auto-snap_weekly-2013-03-06-13h45                        0      -    31K  -
> rpool/zones/tomcat/ROOT at zfs-auto-snap_daily-2013-03-08-13h46                         0      -    31K  -
> rpool/zones/tomcat/ROOT at zfs-auto-snap_hourly-2013-03-08-15h46                        0      -    31K  -
> rpool/zones/tomcat/ROOT at zfs-auto-snap_frequent-2013-03-08-16h31                      0      -    31K  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-20-18h45                 328K      -   317M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-20-20h45                 208K      -   317M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-20-21h45                 271K      -   317M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-20-22h45                 207K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-21-02h45                  33K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_weekly-2013-02-27-13h45                  62K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-02-28-02h45                  26K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-02-13h45                   27K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-03-13h45                   27K      -   358M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-03-20h45                2.56M      -   359M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-04-02h46                  76K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-04-13h45                   42K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-05-02h45                  69K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-05-10h45                  91K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-05-12h45                  55K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-05-13h45                   18K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_weekly-2013-03-06-13h45                25.5K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-07-02h48                25.5K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-07-13h46                 25.5K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-08-12h46                  24K      -   362M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_daily-2013-03-08-13h46                 48.2M      -   413M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_hourly-2013-03-08-15h46                2.64M      -   569M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_frequent-2013-03-08-16h01              28.0M      -   594M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_frequent-2013-03-08-16h16              10.2M      -   579M  -
> rpool/zones/tomcat/ROOT/zbe at zfs-auto-snap_frequent-2013-03-08-16h31               532K      -   596M  -
> myadmin at baptist.ds:~# 
> 
> 
> So, what did I do wrong?
> 
> I thought those files should have been gone, and the zone should have been set back to the way it was at the snapshot I took...
> 
> 
> 
> 
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