Upgrading a FreeBSD 12.2 jail to FreeBSD 13 using mkjail

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Mark Felder and I have been working on a minimalist set of jail scripts for creating and updating jails. All jail management is accomplished via standard vanilla FreeBSD jails. No jail managers are involved. Everything goes through jail.conf. In this post: FreeBSD 13.0 host, recently update from FreeBSD 12.2 FreeBSD 12.s jail on that host, about to be updated to FreeBSD 13 These jails were NOT created with mkjail Jails are mounted at […]

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Adjusting my ZFS filesystems to conform with standard FreeBSD boot environments

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Get FreeBSD 12.2 mfsBSD (because that matches the OS on slocum), burn it to a thumb drive using OSX. NOTE: the following didn’t work. I wound up not having the right values in /lib and /var/db/ I don’t know what I did wrong, but I did manage to fix them up afterwards. I suspect that I still had zroot/usr mounted and did not notice. I will keep my notes here for future reference

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The odd battery post

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I have some odd batteries in use at home. This post will enable me to look them up without opening up the device. Wireless light switch This is used in the server room (aka laundry room in the basement) Cable tester I have had this cable tester for many years. It’s an Ideal LinkMaster. It’s always done well by me. This what the cable tester looks like from the outside.

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Updating my FreeBSD 12.2 host to FreeBSD 13.0

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I am going to upgrade a FreeBSD 12.2 host to FreeBSD 13.0 with one reboot. Actually, here, because of the zpool update, there is another reboot. This is significantly fewer than the standard upgrade process (yeah, critics claim 1 is not significantly less than 2; sigh). The instructions are taken from vermaden’s blog post on Upgrade FreeBSD with ZFS Boot Environments. I have seen a couple of references to this post lately and

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Moving zroot/usr/local to zroot/usr

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Today I was updating a FreeBSD server from 12.2 to 13.0 – I was using a new approach for my upgrades. This was my second host to upgrade like this. The first went smoothly. This one, not so much. NOTE: this turned out to be insufficient because /usr was mounted: [dan@slocum:~] $ zfs get canmount zroot/usr NAME PROPERTY VALUE SOURCE zroot/usr canmount on received This system was manually converted, poorly, to a BE

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snapshot ; ls ; destroy; dataset is busy – WTF?

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I have found this bizarre situation where a FreeBSD 12.2 snapshot cannot be destroyed. This is the simple example, which works: [dan@pkg01:~] $ sudo zfs snapshot tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ sudo zfs destroy tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ This is the simple example, which fails: [dan@pkg01:~] $ sudo zfs snapshot tank_fast/poudriere@snapshot-for-backup [dan@pkg01:~] $ ls /usr/local/poudriere/.zfs/snapshot/snapshot-for-backup cache data jails ports [dan@pkg01:~] $ sudo zfs destroy tank_fast/poudriere@snapshot-for-backup cannot destroy snapshot tank_fast/poudriere@snapshot-for-backup: dataset is busy [dan@pkg01:~] $ EDIT: we

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Converting an iocage vnet jail to a vnet jail

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In this post I will be creating a ‘new’ jail which uses vnet. I say ‘new’ because I am actually Converting an iocage jail to a vanilla jail which happens to use vnet. NOTE: I originally failed to get this to work. You can read about it. I’m going to repost this article soon with a working solution. I won’t describe the process of creating the jail. Sorry. For the record: FreeBSD 12.2

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Deleting old FreeBSD boot environments

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I like boot environments (BE) on FreeBSD. They were especially handy when building the AWS host for FreshPorts, since I had no serial console. I would create a BE saving the current status, then make some changes. I’d mark the current BE as boot once, so I could boot back in the known good BE. Worst case, I could mount the storage onto a rescue EC2 instance and adjust the bootfs value of

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net-mgmt/net-snmp wants /snmp/snmpd.conf

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NOTE: If you are looking to configure net-mgmt/net-snmp for the first time, the latest article is Configuration of net-mgmt/net-snmp on FreeBSD. snmpd can be royal pain to configure. I got my hints from Ryan Steinmetz, the maintainer for the FreeBSD port. Lately, net-snmpd has changed how net-snmp-config works. In this post: FreeBSD 12.2 net-snmp-5.9_3,1 Compare my hints with the following, run today with net-snmp-5.9_3,1: [dan@nginx01:~] $ sudo net-snmp-config –create-snmpv3-user -ro -x AES -a

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