On Tuesday, February 11th, 2025 at 9:52 PM, Michael De Roover
<i...@nixmagic.com> wrote:
> On Monday, February 10, 2025 4:31:46 PM CET Ondřej Surý wrote:
>
>> I am pretty much confused, unless you are using this setup for educational
>
>> purposes, it makes little sense.
>
>>
>
>> Setup like this is similar to onion - it has layers and it makes you cry,
>
>> you can add docker for extra pain or kubernetes for permanent blindness.
>
>>
>
>> It is going to be much easier to get $5/month VPS. Alternatively get (used)
>
>> RPi and host it on a local network.
>
>>
>
>> Ondrej
>
> Raspberry Pi's are really interesting little devices, that - if the budget is
> around 50-200 euro - could offer a really competitive value proposition. I've
> had 5 of them for about half a decade by now, though I gave one of them to my
> little sister as a birthday gift. The first question she asked, was whether
> it could charge her phone :)
>
> The other four have been going on and off in my networks. 2 are currently
> still in use as gateway devices (running WireGuard and keepalived), while one
> of them has been used for a satellite network.
>
> Their base price of 35 euro is incredible, but there's other costs like power
> supply (5V 2-3A) to consider. Also, a micro SD card for storage. One may also
> want to use different means to power the Pi. Personally, I got myself a bunch
> of 15W UPS boards and used one of the 5V boards to power the aforementioned 2
> gateway devices over GPIO pins 3 and 5. This has been stable for about a year
> now.
>
> However, GreatScott (a German electrical engineer on YouTube) measured their
> outputs, and determined them to be quite electrically noisy. The Pi does not
> use 5V directly for anything but things like USB, the Broadcom CPU meanwhile
> uses 3.3V. This suggests that it is stepped down further using an internal
> power supply, where additional filtering would be expected. I'm not too
> concerned about it, and the benefits outweigh the costs. He was also heavily
> invested in fixing similar problems in his powerbanks at the time, so the
> verdict may have been biased. Lots of switching power supplies are noisy like
> that.
>
> https://www.youtube.com/watch?v=6bicunweBAQ
>
> Problem is, 1GB of memory in my 3B's is hardly sufficient for more than just
> BIND alone. For an entire network, it needed a lot more than that (DHCP,
> hostapd, Postfix/Dovecot, Samba, ...). The memory requirements quickly
> balloon back into a fraction of the 100-odd GB I need normally. In
> retrospect, I'd probably go for 4 or 8GB instead. Additionally, the SD cards
> are too slow. Newer Pi's do have PCIe exposed for an SSD though I believe,
> which may be a better option. But that also adds significantly to the cost.
>
> Finally, regarding the VPS's... It depends on whether this is for personal
> education or public production use I guess. If WinBIND was initially
> considered, I somehow doubt it. The way I see it, the public internet is far
> too risky a place to learn DNS in. Local service meanwhile can fail with
> hardly any repercussions.
>
> There is something to be said about an old PC, like one of the Optiplex 7040
> boxes I currently have in service. They're very quiet, cheap, and can contain
> up to 2 SATA drives (using a molex splitter and a 3.5" caddy). Those can have
> their RAM upgraded to 16GB too, and have dedicated 1G networking. The total
> cost may well be similar to the Pi when fully fleshed out, with the remaining
> difference being performance, and a UPS being either more expensive, or a lot
> more complex (replacing the inbuilt power supply and all its voltage rails,
> not for the faint of heart).
>
> As with everything engineering, I suppose it's a variety of compromises.
>
> --
>
> Met vriendelijke groet,
>
> Michael De Roover
>
> Mail: i...@nixmagic.com
>
> Web: michael.de.roover.eu.org
I had considered getting Raspberry Pi before. But the problem is that the
device supports only 1 network card.
Regards,
Mr. Turritopsis Dohrnii Teo En Ming
Targeted Individuals in Singapore
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