I’m going to implement zfstools on all my ZFS-based hosts today. I first started using this tool in July 2019. In this post: FreeBSD 12.0 and 12.1 zfstools 0.3.6_1 sanoid-2.0.1_2 Local snapshots only I will be using zfstool only for creating local snapshots. If I wanted snapshots for sending to other hosts, I would probably […]
zfstools & sanoid – snapshots on the local host Read More »
I noticed this the other day, and thought it was interesting. When the jailed property is set on a ZFS fileset, it affects the mountpoint within the jail. If your jail uses allow.mount.zfs (known as allow_mount_zfs when using iocage), the mountpoints become relative to the jail. For example, in my poudriere jail, this is what
How allow.mount.zfs affects mountpoints for ZFS Read More »
Today is the day. Today I move a zpool from an R710 into an R720. The goal: all services on that zpool start running on the new host. Fortunately, that zpool is dedicated to jails, more or less. I have done some planning about this, including moving a poudriere on the R710 into a jail.
Migrating drives and the zpool from one host to another. Read More »
In my recent post you saw this: [dan@r720-01 ~]$ zpool status zroot pool: zroot state: ONLINE scan: resilvered 818M in 0 days 00:00:09 with 0 errors on Tue Oct 15 21:32:12 2019 config: NAME STATE READ WRITE CKSUM zroot ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 ada0p3 ONLINE 0 0 0 gpt/zfs1 ONLINE
Going from partition to label in zpool status Read More »
I planned to create a zroot mirror when I installed FreeBSD on the R720 but the supplier shipped only one of the two purchased SSDs. Today the second drive arrived. Let’s create a zroot mirror. In this post: FreeBSD 12 man 8 zpool Posts I looked at: creating a mirrored ZFS Pool out of a
Creating a mirror from your zroot Read More »
I have obtained a Dell R720 containing 10 x 400GB SSDs. The drives are connected to a RAID controller (H710P) which cannot do JBOD / IT mode. This means the drives are effectively hidden from ZFS, which is never good. In this post: FreeBSD 12.0 ZFS Dell R720 SAS 9207-8i This post describes past work
Preparing the Dell R720 for ZFS Read More »
ZFS is very flexible about mountpoints, and there are many features available to provide great flexibility. When you create your second zpool this is what it might look like: $$ zfs list -r main_tank NAME USED AVAIL REFER MOUNTPOINT main_tank 893G 3.52T 96K /main_tank main_tank/data 786G 3.52T 88K /main_tank/data main_tank/data/dvl 755G 3.52T 755G /main_tank/data/dvl main_tank/data/freshports
Mount your ZFS datasets anywhere you want Read More »
I have been using ezjail since at least 2008 (see earlier blog post). A few years ago, I started deploying iocage on new servers. About three months ago, I starting converting systems from ezjail to iocage. When I converted my first system, I found that the existing documentation for conversion was incomplete. Specifically, symlinks were
Converting thin jails to thick jails Read More »
Current FreeBSD versions will allow you to create a zroot zpool from which you can boot. However, when I created the main zpool for slocum (on Fri May 3 2:16 2013), that option did not exist. You might ask: how do I know that date? [dan@slocum:~] $ zfs get creation system NAME PROPERTY VALUE SOURCE
Adding a zroot pool to an existing system Read More »
This is x8dtu (named after the SuperMicro motherboard). This is the new FreshPorts server. The older post is still available In short: FreeBSD 11.2 booting off a mirrored pair of zfsroot SSDs 4.5TB of mirrored ZFS 196612 MB of RAM (yeah, that’s 196GB of RAM) SuperMicro X8DTU motherboard Intel Xeon E5620 @ 2.40GHz (two of