In my home setup, Raspberry pis are connected to synology nas over ethernet (Synology provides the iSCSI target) but the ethernet connection doesn’t provide internet. The Raspberry pis are connected to internet over wifi. In this post, we are going to see how to set the default gateway so that the pis can speak reach internet. Open /etc/dhcpcd.conf, Add the below statement to the file interface eth0 metric 300 interface wlan0 metric 200 reboot Now check the routing table with route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.254 0.0.0.0 UG 200 0 0 wlan0 0.0.0.0 10.0.0.2 0.0.0.0 UG 300 0 0 eth0 10.0.0.0 0.0.0.0 255.255.255.0 U 300 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 200 0 0 wlan0
Use iSCSI device as root for raspberry pi Model 4
In this post we are going to document how to make a raspberry use a root iSCSI volume while booting from SD card. Disable swap We do not want to use swap on a network drive. To disable swap sudo systemctl disable dphys-swapfile Reboot after disabling swap so that we can verify it is actually disabled. free -h total used free shared buff/cache available Mem: 7.6Gi 95Mi 7.4Gi 1.0Mi 100Mi 7.4Gi Swap: 0B 0B 0B the 0B in output says swap is disabled. ...
Adding block storage to Raspberry PI (part 2)
In Part 1, we saw how to connect raspberry pi to synology nas using iSCSI. The previous post had a few hiccups. Server startup was really slow. Restart of open-iscsi service was slow. Multiple errors in Synology NAS regarding Max Connections In this post, we are going to streamline the configuration. 1. Stop initiators to attempt multiple sessions. Prestep: Check for active sessions and logout of these sessions Find active sessions: ...
Adding block storage to Raspberry PI
If you want to run any persistent services on your home server, one of the biggest bottleneck is running databases. There are three main issues Storage size - Raspberry pis have a small SD card that cannot hold all the data you want. Volume of Read/Writes Resiliency - How do you RAID the storage attached to your raspberry pi? It would be nice to have a separate server that can handle storage and let our raspberry pi mount block devices over network. Luckily with Synology NAS, we can achieve this easily. ...
Ups Management for Synology and Raspberry Pi clusters
The main component required for running a cluster of servers at your home is supplying them with uninterrupted power. Not only is powering them correctly important, it is also important that the servers can shut down gracefully in the event of a power failure. The standard way to do this in linux is to use NUT. My current home setup consists of cluster of raspberry pis and a Synology NAS. The below configs are a documentation of the NUT master, slave and Synology DSM config. ...
Home network setup
The devices provided by ISPs such as Xfinity and Comcast typically do not have enough power to run a proper home networking solution. They also cost us around $10 per month in rent. We can reduce this cost and get better networking by managing our devices. To do this, we need to understand a bit about networking. The device provided by your ISP does four actions primarily. Modem -> To encode & decode the data over the wire. Router -> To route traffic from your ISP network to the internal network. Switch -> If your device has multiple ethernet ports, you are also running a switch. (The lines are blurry, and I don’t have a full grasp on the differences between a switch and a router except that a switch is layer-2 technically) Access Point -> The device that provides you with wifi access. I like buying small or medium business equipment as I think they provide the best value for our money. Given this, below is the list of devices I use. ...
Firefox and addons everyone should have
I like using Firefox as it aligns with my privacy outlook. I also love Firefox just for the major rewrite they did with Rust. I try to convince my friends to start using these addons and I thought it might be a good idea to start writing these down. So here is a quick list. uBlock Origin Note the name uBlock Origin. It’s not uBlock or Adblock Plus. uBlock Origin is the one that is maintained by the original author. This is the addon that will protect you from ads and unwanted trackers. Not uBlock or Adblock Plus. ...