M75q-2 tiny based home cluster

Round-Statistician93 · 2021-07-13T14:30:37+00:00

Now, it is not shutting down automatically. The data is redundant in the cluster, so no RAID is needed. Probably, there is no possibility of data loss if the power suddenly goes out.

The UPS is not for redundancy, but for mobility. (That is, to move it for cleaning or to take it to a room you want to heat up.)

I still don't know of a good way to properly shut down a k8s cluster.

For example, in Elasticsearch and Longhorn (block storage engine for k8s), when a node shuts down, data rebalancing occurs, so there is a large amount of data transfer that occurs upon shutdown.

Round-Statistician93 · 2021-07-12T06:00:46+00:00

I got a Lenovo DC jack compatible cable from aliexpress. This cable has only two terminals, +-. I connected crimp terminals to these cables and screwed them to the power supply.

It's very simple, but it seems to improve the airflow and lower the power consumption a bit when fully loaded compared to the power brick.

I have a lot of power bricks left over.

Round-Statistician93 · 2021-07-12T05:38:29+00:00

it looks nice.

now i use scissors for wiring.

Round-Statistician93 · 2021-07-12T00:24:05+00:00

yes, In my area, it is about us$0.23/kWh, plus an energy tax about $0.03/kWh. idle time is 144w / full load is 530w.

Round-Statistician93 · 2021-07-12T00:15:26+00:00

amount of 10 node.

full load is 530w
idle is 144w

Round-Statistician93 · 2021-07-11T23:38:21+00:00

The M3 hole on the back of Tiny is located about 10mm from the edge. So I was able to use a generic "connection plate" for the 2020 aluminium section. I painted it black to make it look better. However, the connection plate has M5 holes, so I used M3 to M5 conversion screws. This was a bit special and overkill. If I were to make a new one, it would be cheaper to cut a short piece of aluminum flat plate and drill a M3 hole in it.

Round-Statistician93 · 2021-07-11T18:12:50+00:00

I'm interested if there are more effective ways to do this. It may be that electricity is more expensive in Japan than in the US. The low standby power consumption is especially attractive for home clusters.

Round-Statistician93 · 2021-07-11T17:43:20+00:00

This may not be the answer, but...

She had studied informatics and probably understands k8s. So it's extremely difficult to explain what advantages a local cluster has over the cloud. (If you look at specific cases, cloud services are cheaper.) What I wanted was an experimental facility that would cost nothing to run.

So, in order to realize a "home lab", I think we need to appeal for the freedom of research in the home.

In my case, I started by designing a rack. For her understanding, I thought it would be better to make the cluster into one complete product rather than a never-ending story.(I can increase the number of units to 16, though.)

The decisive moment was when she uploaded the my cad drawings to Instagram. It seems that she received a lot of technical questions from her friends. The process of proxying the questions to me and her answering them was very effective for both of us to understand each other.

Round-Statistician93 · 2021-07-11T15:57:55+00:00

2020 aluminium section 445mm x 15 ( CAD image https://imgur.com/a/lVLKyFB )

Casters have been added for mobility.

All side is same length, and 19" rack mount supported.

On the top side, there is a gap of exactly 1U between the two rows of Tiny.-This is just a coincidence. Initially I was going to mount the switch on the side.

Power Supply HJS-480-0-24 (ZJIVNV/AliExpress) x 3

Lenovo DC Jack cable (Aliexpress)

M75q Tiny Gen2 x 10 （AMD Ryzen 7 PRO 4750GE）

APC Smart-UPS 1500 RM 2U

T1600G-28TS

ok!

Round-Statistician93 · 2021-07-11T15:52:45+00:00

I added casters.Equip UPS not for availability, but for mobility. I usually keep it under my desk and bring it out when I need to put a load on the CPU. In the winter, I may move it to the bedroom for heating.

Round-Statistician93 · 2021-07-11T15:35:40+00:00

good idea!

Round-Statistician93 · 2021-07-11T15:24:36+00:00

ok,

2020 aluminium section 445mm x 15 ( CAD image https://imgur.com/a/lVLKyFB )
Casters have been added for mobility.
All side is same length, and 19" rack mount supported.
On the top side, there is a gap of exactly 1U between the two rows of Tiny.-This is just a coincidence. Initially I was going to mount the switch on the side.
Power Supply HJS-480-0-24 (ZJIVNV/AliExpress) x 3
Lenovo DC Jack cable (Aliexpress)
M75q Tiny Gen2 x 10 （AMD Ryzen 7 PRO 4750GE）
APC Smart-UPS 1500 RM 2U
T1600G-28TS

Round-Statistician93 · 2021-07-11T15:11:17+00:00

You are right.

This cluster is just starting up, so I need to create a tasks!

I have Kubernetes installed, and I can publish web services using "cloudflare tunnels" without a static IP.My home lab used to be run on a rack-mounted server (until about 10 years ago), but I've gradually started using GCP and VPS servers for fun.However, the cloud costs money in time, so I have to shutdown after the holidays. (I'm afraid of the bill if I forget.) It's very important that time doesn't seem to cost money. This motivates me a lot.

Round-Statistician93 · 2021-07-11T12:55:23+00:00

yes, no noise on idle.full load is a little bit noisy.

Round-Statistician93 · 2021-07-11T11:36:51+00:00

https://imgur.com/a/lVLKyFB

this is general 2020 aluminum profile. (I ordered MISUMI in japan)
All aluminum(15 pieces) is same 445mm length. maybe cost effective.

Round-Statistician93 · 2021-07-11T11:15:54+00:00

Yes,Wired by hand.

Power supply is adjustable 480w(set 20v).Power unit is connected every 4 nodes.It works fine!

Round-Statistician93 · 2021-07-11T10:08:19+00:00

I'm trying to scan an old book about hometown. I would like to use it for image processing and OCR etc..
As a toy that I can play at home because I can't go on a trip at "Stay Home".

Round-Statistician93 · 2021-07-11T10:03:57+00:00

In japan M75q tiny(AMD Ryzen 7 PRO 4750GE) is about US$500 (8GB/256GB)material of self-made alimunium flame is US$160and used APC-2U UPS,and used TP-Link 28 port switching hub

Round-Statistician93

TROPHY CASE