ZFS

FreeBSD jailed ZFS datasets – how do I find the .zfs/snapshot directory?

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On FreeBSD, you can jail a ZFS dataset – that is, the jail can manipulate the ZFS dataset as if it was a host (more or less). This has useful applications. In my case, I want to backup a snapshot of that dataset from the host. For example, I want to backup this dataset: [12:19 r730-01 dvl ~] % zfs list data02/freshports/jailed/dev-ingress01/data/latest_commits NAME USED AVAIL REFER MOUNTPOINT data02/freshports/jailed/dev-ingress01/data/latest_commits 572K 798G 120K /var/db/ingress/latest_commits Within […]

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Backing up FreeBSD with Bacula via ZFS snapshot

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Tonight, while watching an episode of The Great British Bake Off, I configured a new Bacula backup jobs to cover some datasets which were not already backed up. I already have a backup jobs to backup all the jails, but only for datasets which sit right under zroot/jails (for example). This new solution takes a list of datasets, snapshots them, backs them up, then destroys those snapshots. Why backup a snapshot? Consistency. During

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Debugging snmp output when using LibreNMS

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Librenms is my tool-of-choice for grabbing metrics from switches, servers, wireless access points, and anything else with an snmp interface. In this post: FreeBSD 14.0 LibrenMS 23.11.0,1 – updated to 23.11.0_1,1 within this post net-snmp-5.9.1_4,1 After updating some hosts to FreeBSD 14, the zfs application/extension broke. It was quickly amended after a report was lodged. However, after the fix, I still wasn’t getting graphs. It was nan all across the board for ZFS:

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Jails with embedded, but not jailed, ZFS datasets – how to mount/umount – corrected

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This is a rewrite of Jails with embedded, but not jailed, ZFS datasets – how to mount/umount. First, this is not about jailed ZFS datasets. I use them for FreshPorts, but that’s not I’m going to talk about here. In this post: FreeBSD 13.2 This is my example: [22:25 r730-03 dvl ~] % zfs list | grep bacula-sd-04 data01/bacula-volumes 12.1T 4.18T 96K /jails/bacula-sd-04/usr/local/bacula/volumes data01/bacula-volumes/DiffFile 109G 915G 109G /jails/bacula-sd-04/usr/local/bacula/volumes/DiffFile data01/bacula-volumes/FullFile 4.00T 2.00T 3.89T /jails/bacula-sd-04/usr/local/bacula/volumes/FullFile

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Moving 4x storage devices into a new home

Leave a Comment / Disks, FreeBSD, hardware, nvme, R730, ZFS / By /

Yesterday I did some scavenging of some servers which I’m going to dispose of. I managed to put together 4 x 1TB storage devices: 2 x NVMe sticks and 2 x SSDs. I also pulled a riser card from an R730 and relocated it to another host. The NVMe sticks are mounted on these PCIe cards, which I do not regret buying. They came with full height and low-profile brackets. More to the

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Jails with embedded, but not jailed, ZFS datasets – how to mount/umount

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This approach did not work, because I used the wrong set of filesystems. See below for Error. This post has been replaced by Jails with embedded, but not jailed, ZFS datasets – how to mount/umount – corrected. NOTE: on yesterday’s (2023-10-04) reboot, the file systems did not properly mount. zfs get mounted said they were mounted, but the directories were empty. Stopping, then starting the jail resulted in a proper mount. I wonder

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Moving time capsule from host to jail and connecting my MacBook to ZFS on FreeBSD

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I have Macbooks at home I use them. I use Time Capsule on ZFS on FreeBSD to back them up. In this post: FreeBSD 13.2 OSX Ventura 13.6 I first implemented this directly on the FreeBSD host. Today, I am moving that service into a jail. This post will roughly outline the changes I made to accomplish this move. It won’t go into the details of how to set up Time Capsule. See

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Bacula – calculating Maximum Volume Bytes and Maximum Volumes based on historical data

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I’ve used Bacula since at least January 2004 (so nearly 20 years). I liked it so much I dropped my deployment-in-motion of another tool (if you search lightly, you can find out which one). I liked it so much, I wrote a PostgreSQL backend for it. This post is not for Bacula novices. This post is for those who have already deployed a Bacula instance and are rather familiar with the process. I

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Moving ZFS filesystems/datasets from one ZFS zpool to another

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Now that I’ve filled up data01, I bought some more SSDs and created another zpool. Today, on this snow-is-anticipated Saturday winter morning, I’m going to move some ZFS filesystems/datasets around. Side note: I like the term dataset better than filesystem. man zfs talks about datasets, which can be a file system, a volume, a snapshot, or a bookmark. However, usually when I talk about a filesystem, it might be dataset. It’s a fine

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Dan makes another zpool

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I spent my lunch, and most of my mortgage payment, on 4 x 4TB Blue 4TB SSD 3D NAND (WDS400T2B0A). In this post: FreeBSd 13.1 smartctl output partition creation zpool creation In they go This is them, being inserted into the system: I am concerned by that 150.000MB/s transfers smartctl Let’s look at the smartctl output, just in cases there are returns. What speed can that drive do? I was concerned about that

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