Spyke

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10" vs 250mm in 3D printing

Many 3D printers have their biggest axis at 250mm max (at least those of my friends that I asked). While you can rotate the print a bit to max out the space, you have to print pretty high which apparently can become unreliable.

I wonder if cutting 2mm on each side for 10" mountable pieces is fine. The mount holes are are 236,5mm apart (measured from the center of each). If they get printed with 8mm diameter, that's 244,5mm (+4mm each side), so there's only 3mm left on each side when reducing the total with to 250 (instead of 5mm at 254mm total). That seems pretty narrow but then that part is not the load bearing one. Any experience with this?

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Building a Low Power NAS - searching for a case

I'm currently planning to build a low power nas for my upcoming minirack (10").

It's going to store daily proxmox vm disk snapshots, some image files and some backups from my laptop, all via NFS. Plus some more in the future, but generally, it's going to idle 95% of the day. Not decided on the OS yet, probably TrueNAS Core or OMV.

I already have an Olmaster 5,25" JBOD in which I'll put 3 x 2,5" 2TB SSD via SATA. The JBOD needs a single Molex connector for powering all SSDs. So I need at least 3 SATA + Boot.

Some recherche led me to this post and I tend towards a similar build with a J4105-ITX (cheaper, probably little less power consumption, enough CPU ofr NAS).

These officially are limited to 8GB RAM but seem to work fine with more if you don't update your BIOS which is not optimal but acceptable if everything else works fine. I'd like 16G for efficient ZFS but I guess even 8 are fine if it's not doing much else (2GB base + almost 1 for each TB storage + OS), just don't tell TrueNAS forum users.

While I don't plan 10G ethernet now, the PCIe slot should leave that possibility open.

I read good things about PicoPSUs, but that depends on which case I get as they usually already got some PSU.

The case question remains open - I tend to get something like the LC-1350MI-V2 as it's cheap, contains a 72W PSU and fits into the 10" rack nicely. In that case, I would need to go out of the case with the SATA cables and rack the JBOD on it's own - which is fine since there's pritable files for exactly that. Other possibility would be to get a case with bays for the 2,5" (seems unnecessary since I already have the JBOD and don't want to add more requirements to the PSU) or get a case with a 5,25" bay (rare in cases this size).

I'm mostly asking for advice regarding the case/PSU thing but nothing is set in stone other than the SSD/JBOD combo. I'd like to keep the rest < 150€ and prefer used hardware, at least for the case. I'd be glad for your thoughts and ideas!

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selfhosted·Selfhostedbytofuwabohu

Ghost blog adding activitypub

Not sure if this has already been posted since it's kind of old news (early 2024), but I think that's exciting. I'm currently looking into blog software with nice webgui and I might wait for this to become real. Looking at the announcement page, they seem to take it seriously and there's continuous merged PRs since April until recently regarding AP on their GitHub.

Ghost blog adding activitypubhttps://activitypub.ghost.org/Open linkView original on slrpnk.net
298
selfhosted·Selfhostedbytofuwabohu

What's up? - Sunday weekly

I thought of a weekly thread to post about what you set up lately, what kind of problems you currently think about or are running into, what new device you added to your homelab or what interesting service or article you read.

So I decided to just try it. Maybe we find a format that works! It doesn't have to be me, feel free to create this post on Sunday if it's not up already.

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47

Second LAN for homelab

I want to establish a second LAN at home. It's supposed to host different services on different infrastructure (vms, k8s, docker) and mostly serving as a lab.

I want to separate this from the default ISP router LAN (192.68.x.0/24).

I have a machine with 2 NIC (eno1 plugged in at ISP router and eno2), both with corresponding bridges and proxmox. I already set up the eno2 bridge with a 10.x.x.x IP and installed a opnsense vm that has eno1 as the WAN interface in the 192 network and eno2 as the LAN interface as 10. network with dhcp server.

I connected a laptop (no wifi) to eno2, got a dhcp lease and can connect the opnsense interface, machines in the 192 network and the internet, same for a vm on the eno2 bridge, so that part is working. There's a pihole in the 192 network that I successfuly set as the dns server in opnsense.

Here's what I am trying to achieve and where I'm not sure about how to properly do it:

  • Block access from the 10 network to 192 network except for specific devices - I guess that's simply firewall rules
  • Make services (by port) in the 10 network accessible to the internet. I currently have a reverse proxy vm in the 192 network which got 80 and 443 forwarded by the ISP router. Do I need to add a second nic to the vm or can I route some services through the firewall? I want to firewall that vm down so it can't open outgoing connections except for specific ports on specific hosts.
  • Make devices in the 10 network available for devices in the 192 network - here I'm not quite sure. Do I need to a static route?
  • Eventually I want to move all non-enduser devices to the new LAN so I can experiment without harming the family network but I want to make sure I understand it properly before doing that

I'd be glad for any hints on this, I'm a bit confused with the nomenclature here. If you have other ideas on how to approach this, I'm open for that too.

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15
raspberry_pi·Raspberry Pibytofuwabohu

Add SSD to raspi4 without zigbee interference

I'm looking for a solution to replace the SD card in my raspberry pi 4 with an SSD.

There are many "hats" from geekworm that do exactly that. However, they all use the USB port and mentioned that the adapter can create interference in the 2,4 GHz range.

The main purpose of the raspi is being the Home Assistant server and the Zigbee hub (Raspbee II dongle on the io pins). Zigbee is using 2,4GHz as well and I don't want the connectivity being impaired.

What's the best option here? I thought of getting an "external" ssd so the adapter isn't as close to the dongle. Does the interference from the adapter itself or the USB port on the raspi?

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