Open Source

Optimizing UPS power use when the power goes out

Leave a Comment / Eaton, Network monitoring, nut, UPS / By /

This post is mostly for myself. I’m just putting my Sunday morning thoughts down for later review and consideration. When Selecting replacements batteries for my Eaton 5PX UPS (5PX2200RT & 5PXEBM48RT), I began to think about: when the power goes off, why can’t I keep using my laptop? Usually, I still have an Internet connection: the ISP isn’t going offline. Why not turn off the two servers in the basement, and anything else […]

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Loading up an old copy of a PostgreSQL database, zfs snapshots, and sanoid snapshot management

Leave a Comment / FreeBSD, Open Source, PostgreSQL, sanoid, snapshots, ZFS / By /

Sometimes you want to go back to a known good state. And you want to do it quickly, without waiting around. In my case, that’s going to be a zfs snapshot. Today I am preparing to test some code changes so that FreshPorts properly creates a new category. See these recent blog posts for details: Welcome to the new category: filesystems Fixing the category creation code In this post: FreeBSD 14.1-RELEASE-p5 postgresql16-server-16.4 dbclone

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zfs hold / release

Leave a Comment / FreeBSD, Open Source, snapshots, ZFS / By /

Let’s talk about zfs hold. Based on man zfs-hold: “If a hold exists on a snapshot, attempts to destroy that snapshot by using the zfs destroy command return EBUSY.” Let’s apply that to some FreshPorts snapshots which I don’t want going away: This is your typical FreshPorts website: [15:03 dvl-nginx01 dvl ~] % zfs list NAME USED AVAIL REFER MOUNTPOINT data02 1.13T 565G 96K none data02/freshports 671G 565G 88K none data02/freshports/jailed 326G 565G

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Self-hosting Bitwarden / VaultWarden on FreeBSD

6 Comments / FreeBSD, Jails, Open Source, Security, VaultWarden / By /

The time has come for me to consider another application for my TOTP data (think 6-digit codes produced by Google Authenticator or an RSA device. I’ve been using an app called 2STP – I have long liked it. Support for it ended about 7 years ago, yet it continued to slug along on my phone and on my watch. Recently, it stopped working on my watch. That was the tipping point. I decided

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fail2ban – adding to my website to deter abuse

Leave a Comment / fail2ban, FreeBSD, Open Source, pf / By /

The type of abuse recently seen on FreshPorts isn’t a big deal. I would ignore it if it was on my own server. However, I’m using a “paid” service and the credits go faster when pillocks do pillocky stuff. While I hope I’ve covered what I’ve done, I’ve been sick with a cold for a week, and helping to look after two < 4 year-olds for two weekends in a row. Perhaps I've

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kernel: Limiting closed port RST response from x to y packets/sec

Leave a Comment / dma, FreeBSD, Mail, Open Source, Postfix / By /

For 3 days now, I’ve been seeing these messages. If you search online, it’s usually the result of port scanning. Aug 7 14:05:15 zuul kernel: Limiting closed port RST response from 212 to 195 packets/sec Aug 7 14:05:16 zuul kernel: Limiting closed port RST response from 219 to 215 packets/sec Aug 7 14:05:17 zuul kernel: Limiting closed port RST response from 220 to 193 packets/sec Aug 7 14:05:18 zuul kernel: Limiting closed port

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What’s this gap in the graphs?

Leave a Comment / Backups, Bacula, FreeBSD / By /

I was checking email this (Friday Jul 19, 2024) morning, over coffee, while many IT folks dealt with Cloudstrike fallout, when I noticed this message from the logs: Jul 19 09:12:18 zuul kernel: [zone: pf states] PF states limit reached I’ve seen that message before. It’s not of high concern. That server contains many services including PGCon, the former BSDCan website, and my blogs. I didn’t give it much concern, although I should

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Where’s my backup?

Leave a Comment / Backups, FreeBSD, Open Source / By /

Nagios was telling me: FILE_AGE WARNING: /usr/home/rsyncer/backups/aws-1/postgresql/freshports.org.dump is 117636 seconds old and 3608113799 bytes That means the FreshPorts backup is more than a day old, and it should have been refreshed by now. OK, let’s go look. I log into the host known as aws-1 and check the files. They look fresh to me: [rsyncer@aws-1 ~/backups/database-backup/postgresql]$ ls -lt total 3525154 -rw-r–r– 1 rsyncer rsyncer 3963 Jul 16 02:14 globals.sql drwxr-xr-x 2 rsyncer rsyncer

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Transferring a VM from one provider to another

Leave a Comment / Azure, DigitalOcean, FreeBSD, ZFS / By /

Yesterday, I mentioned (in more than one place) that I planned to move a 2017 Digital Ocean droplet over to Azure. As I sit here, with coffee, on the balcony, overlooking lot of green trees, at 7:45 AM, I’m trying to put into words the plan I came up with about 30 minutes ago. In this post: Digital Ocean Microsoft Azure FreeBSD 14.1 Why move? There is no technical issue or dissatisfaction involved

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Updating some jails from FreeBSD 14.0 to FreeBSD 14.1 via mkjail

Leave a Comment / FreeBSD, mkjail, Open Source / By /

I’ve updated all my hosts to FreeBSD 14.1 – but not all the jails. I’m going to do some of that today. In this post: FreeBSD 14.0 FreeBSD 14.1 mkjail-0.0.4 What’s on r730-03 to update? Full disclosure: mkjail was originally written by Mark Felder, and I joined him in maintaining it. I use it for: Creating jails Updating jails (patching, like freebsd-update fetch install) Upgrading jails (as in going from FreeBSD 14.0 to

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