rpaisley.com

ZFS Snapshotting With Incremental Send/Receive

Mon, 17 Nov 2025 14:34:23 +0000

ZFS Snapshotting With Incremental Send/Recieve

This serves as a note to myself on the process of creating a ZFS snapshot and sending the incremental from the last snapshot it to my backup server. It maybe useful for others by substituting d=cachecove/zwift with your ZFS pool / dataset name.

ds=cachecove/zwift
set -x
from="$(ssh gore zfs list -H -t snapshot -o name -s creation "$ds" | tail -n 1)"
d="$(date -Imin)"
zfs snapshot "$ds@$d"
printf "Sending from %s to %s\n" "$from" "$ds@$d"
zfs send -i "$from" "$ds@$d" | ssh gore zfs receive "$ds"

Sticky Watts

Tue, 11 Nov 2025 02:07:27 +0000

Sticky Watts

On Friday November, 7th, 2025 Fury Rhinos raced in a club ladder 5v5 race against SISU Kohota. I’m a member of Fury Rhinos, this was my third race. I finished 7th place and should have earned 4 points for our team but I was disqualified for “Sticky Watts.”

Ladder Result (Login Required)

Below you’ll find a description of sticky watts followed by my defense. I did not cheat and it annoys me to have a disqualification on my record that implies such.

Zwift Checklist

Mon, 03 Nov 2025 20:12:01 +0000

Zwift Checklist

General list of things I’m likely to forget to do and regret it mid-ride or mid-race.

My fan switch is next to the trainer, or it would be on the checklist as well.

Pre-Ride

Kit / Socks
Heart Rate Strap
Water Bottle(s)
Food / Gels / Snacks
Towel
Sweatbands (head/wrist)
Ensure Heat is off
Lube the chain?
Turn on Trainer
If recording, start

5-10 Minute Warning

Join Discord as necessary
Swap Bike / Wheels / Jersey / Update Name
Join Event
Restroom
Ice pack in jersey pocket if high intensity
Eat a gel

Post Ride

Stop recording
Trim Video
Upload
Turn off Fans / Trainer

Zwift ZRL

Tue, 30 Sep 2025 01:06:59 +0000

Zwift Racing League

For the first time I recorded my Zwift Racing League race in the hopes to get feedback and get better at it.

ZRL Round 1 Stage 2 on Fine and Sandy Olive Division 1 (C) Fiery Rhinos

I’ll share some of the feedback I get from that race here eventually.

ffmpeg

Tue, 30 Sep 2025 00:53:41 +0000

ffmpeg Commonly Used Commands

Trimming Files Without Re-encoding

The following steps is how I trim recorded Zwift rides and/or races. I aim to eliminate the setup at the beginning and the teardown at the end without having to re-encode the video as that’s an expensive process. Using the nearest key frame allows skipping the re-encode and I do it in two separate steps to avoid math caused by the initial seek changing the end time of the video.

OpenBSD Update Procedure

Fri, 20 Jun 2025 12:40:54 +0000

OpenBSD Update Procedure

This is a brief overview of how I upgrade to the latest OpenBSD release. Mostly for my own documentation purposes.

Prepare

Backup existing configuration files to avoid things like sshd host key changes
```
tar -czf /home/whistler-20250620.tar.gz /etc /home/rpaisley /root /var
```

Make a note of which ethernet interfaces map to which devices

$ ifconfig -a
re0: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4> mtu 1500
 lladdr 88:c9:b3:bf:0d:16
 index 1 priority 0 llprio 3
 groups: outside egress
 media: Ethernet autoselect (1000baseT full-duplex,rxpause,txpause)
 status: active
 inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
re1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 lladdr 88:c9:b3:bf:0d:17
 index 2 priority 0 llprio 3
 media: Ethernet autoselect (1000baseT full-duplex,rxpause,txpause)
 status: active
 inet 10.1.1.254 netmask 0xffffff00 broadcast 10.1.1.255
re2: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 lladdr 88:c9:b3:bf:0d:18
 index 3 priority 0 llprio 3
 media: Ethernet autoselect (1000baseT full-duplex)
 status: active
 inet 10.1.3.254 netmask 0xffffff00 broadcast 10.1.3.255
re3: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 lladdr 88:c9:b3:bf:0d:19
 index 4 priority 0 llprio 3
 media: Ethernet autoselect (1000baseT full-duplex)
 status: active
 inet 10.1.2.254 netmask 0xffffff00 broadcast 10.1.2.255
re4: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4> mtu 1500
 lladdr 00:e0:4c:68:14:f7
 index 5 priority 0 llprio 3
 groups: outside
 media: Ethernet autoselect (1000baseT full-duplex)
 status: active
 inet 67.241.21.20 netmask 0xfffffc00 broadcast 67.241.23.255
re5: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4> mtu 1500
 lladdr 00:e0:4c:68:14:f8
 index 6 priority 0 llprio 3
 media: Ethernet autoselect (none)
 status: no carrier

Save list of installed packages

Prometheus

Tue, 17 Jun 2025 22:44:47 +0000

Prometheus

After following FedoraRHEL Based How To Install Prometheus on Fedora 41 I needed to do the following as my Fedora installation’s SELinux policy denied the service exec permission:

sudo restorecon -R /usr/local/bin

The SELinux context should be:

unconfined_u:object_r:bin_t:s0

Flex Switch Adoption

Fri, 23 May 2025 20:50:00 +0000

USW-Flex (46W)

In order to adopt the USW-Flex from outside the layer two segement the Unifi network controller exists on, the switch must be able to resolve unifi and connect to port 8080 via TCP to the IP address unifi resolves to.

In my environment this required giving the switch a gateway and a DNS server which I generally do not provide to my camera network.

Attic Cameras

Sun, 18 May 2025 15:08:09 +0000

Camera Power Draw Table for Future Reference

Power is Maximum Power Draw in Watts (W)
Viewing Angles are listed after lens correction in degrees

Camera	Count	Power	Horizontal	Vertical
UVC-G3-Bullet	1	4	72	42.9
UVC-G3-Dome	1	4	87.8	55.4
UVC-G3-Flex	2	4	80	46
UVC-G4-Bullet	1	4	86	60
UVC-G6-Bullet	2	9.9	109.9	56.7
UVC-G6-Turret	2	12.5	109.9	56.7

Firewall

Mon, 16 Dec 2024 21:42:58 +0000

OpenBSD 7.6 Installation Process

Download the install7.6.iso file linked from the download section of the OpenBSD website
Place ISO into ISO partition of a Ventoy USB stick
Boot from the USB stick and begin the installation process

Installer Questions / Answers

The following is how I configure a nearly minimal firewall suitable for home use. It assumes the internal LAN IP address is 10.67.33.254/24 with re0 being the interface with external connectivity and re1 being the internal LAN.

Clonezilla

Tue, 22 Oct 2024 00:58:34 +0000

Tips

When cloning filesystems, clonezilla is good at only storing the occupied blocks of each partition’s filesystem. If you might ever need to restore to a smaller disk, spend the up front time to:

Boot to a Live Disk.

In my case an Ubuntu 22.04 LTS netboot was used. The tools were already installed and netbooting was already present.
Figure out how much space is actually in use:
```
df -h
```
Resize the filesystem close to that number (not so close that the machine is unusable from no free space)

IPv6

Wed, 09 Oct 2024 20:41:24 +0000

Starlink Debugging

Today at work was one of those days where the day was spent trying to ascertain why an IPsec tunnel wouldn’t work between two TP-Link Omada VPN routers. They worked when directly connected to one another but not across the Starlinks. The only differences in their configurations was a dynamic DNS IP address provided by no-ip for Starlink and hard coded IP addresses for the direct connections.

After far too long than I’d like to admit, I noticed via the Starlink dashboard that one of the terminals had two IP addresses listed: The IPv4 address that no-ip was returning, and an IPv6 address. Once the terminal with multiple IP addresses was rebooted, everything worked perfectly again. The theory is that the one terminal was configured via a small wireless router so we could align the starlink terminals with the Starlink app got either the IPv6 or both the IPv4 and IPv6 addresses and it stuck with it while it was powered on.

About

Mon, 30 Sep 2024 19:50:00 +0000

Rob Paisley’s the author of this site. I’m currently employed as a Software Engineer at North Point Defense

Links to various sites where I’m active:

The source code for this site is available on GitLab.

This Site's Hugo Setup

Mon, 30 Sep 2024 18:17:55 +0000

This Site’s Hugo Setup

The initial configuration with hermit-v2 is straightforward. My goal was a simple site without a JavaScript requirement which this achieves. Be sure to use the suggested hugo.toml.example or you’ll run into the following error message:

Error: error building site: render: failed to render pages: render of "section" failed: "/w/themes/hermit-v2/layouts/_default/list.html:39:50": execute of template failed: template: _default/list.html:39:50: executing "main" at <.Site.Params.dateformShort>: invalid value; expected string

Fixing i18n Issues

The hermit-v2 theme uses English as it’s default rendering if i18n isn’t setup properly.