Posts

Running container with Podman Quadlet

Up until recently, my preferred method of creating Podman containers is to use Ansible, and that has been working fine for me. However, I just stumble the new-to-me method called “quadlet”. So far, I really like it, and already started moving some containers to quadlet. To learn more about Quadlet, check out [1]. But, today I’m going to share an example of creating a simple container with Quadlet. In this example, the container whoami is run in rootless mode, under a non-privileged user....

How to import ZFS pool with duplicated pool names

If you use ZFS as the file system, you probably already know that tank is the most common name for ZFS pools. That also applies to me, I do name most of my ZFS pools as tank as the default. There is no issue with that name, however, since ZFS’s pool name must be unique, this means I couldn’t import or have multiple ZFS pools with the name tank on a system....

How to enable and check linger for a systemd user

“The systemd login manager will terminate any user services when their login session ends unless you enable user lingering with the enable-linger option. Use loginctl with the enable-linger option to configure a user to start during the boot process and prevent the systemd service from terminating when the user session ends.” [1] To enable linger for a user, e.g. kenno, we can run the following command: # loginctl enable-linger kenno I usually ran the above command, and that was it....

Accessing host from inside Podman 5.0 container

Sometimes you need to connect to the host from a Podman container running on it. How would you do that? In the past I was able to get this working by connecting to the gateway IP of the container. For example, I have a web server running on the host listening on port 8080. ➜ nc -vz localhost 8080 Ncat: Version 7.92 ( https://nmap.org/ncat ) Ncat: Connected to 127.0.0.1:8080. Ncat: 0 bytes sent, 0 bytes received in 0....

Expand ZFS partition to use entire disk

This is just a quick note to jot down what I did to resize and expand a ZFS partition to entire disk. I never had to do this before; it tured out it was quite easy. First ensure that the autoexpand option is set on the zpool. Then, stop the VM in order to resize the disk volume. [root@phnomaural ~]# zpool set autoexpand=on immich [root@phnomaural ~]# poweroff [root@phnomaural ~]# Connection to phnomaural closed by remote host....

Fix container to container DNS lookup failed in Podman OpenSUSE Leap 15.16

I’ve started to running more containers in my homelab with Podman, running inside AlamaLinux. Most of the times, things just worked. However today, I tried to setup similar containers on OpenSUSE Leap 15.16 host, and I came across an issue getting containers to communicate with one another. Well, spoiler alert, I found a solution, hence this blog post. TL;DR - install cni-plugin-dnsname package from cni-plugin-dnsname build service. (No package from the official OpenSUSE repo)....

NGINX 413 Request Entity Too Large

While trying to upload a file to a web app using NGINX as a reverse proxy, I encountered the following error: ... Save(<data/c5ceb2d914>) returned error, retrying after 19.847451977s: client.PutObject: <html>Documents/Fonts/FiraCode.zip <head><title>413 Request Entity Too Large</title></head> <body> <center><h1>413 Request Entity Too Large</h1></center> <hr><center>nginx/1.20.1</center> </body> </html> Save(<data/d194099394>) returned error, retrying after 36.899440019s: client.PutObject: <html>Documents/Fonts/FiraCode.zip <head><title>413 Request Entity Too Large</title></head> <body> <center><h1>413 Request Entity Too Large</h1></center> <hr><center>nginx/1.20.1</center> </body> </html> ... It turned out that NGINX has default value for file upload limit to 1 MB set in client_max_body_size variable....

Look up one own's public IP easily

Occasionally, I need to look up my own public IP for various reasons. To do this, I would google “what is my ip”, and got a result on the browser. Recently, I found a way to easily do this using curl command to an easy to remember URL ifconfig.io. Here is an example, of course with the fake IPs as the results: ➜ curl ifconfig.io 2444:3444:20a:5310:d6c9:ffff:fef1:7777 To get the IPv4, we can supply the -4 option to curl command:...

Installing Nerd Font on Fedora

I want to install ‘Hack Nerd Font’ on my laptop running Fedora 40. As of today, there is no RPM package that I am aware of that provides this font. Therefore, I would need to download and install the font manually. Visit the Nerd font website, to choose a preferred font. I like Hack Nerd Font. It can be downloaded from the Download link. Unzip the downloaded (e.g. Hack.zip) and move or copy the directory to ~/....

Resizing a root partition on Linux VM

Well, I recently learned that one of my VMs had its root partition full. The following document on the root partition was resized on that VM. It’s not gonna be something exciting or anything special. However, I feel like I should document anyway, in case I forget on how to do that in the future, and partly due to I no longer work with these type of work as my daily job anymore....