Eric Radman : A Journal

Persistent Volumes provide a means of connecting a service with storage.

These are the steps to diagnosing a problem booting OpenBSD using EFI and PXE. probing: pc0 com0 mem[636K 1887M 16M 84K 88K 752K 16K 4M 584K 7M 6M 6148M] disk: hd0* hd1* hd2* hd3* hd4 >> OpenBSD/amd64 BOOTX64 3.69 boot> cannot open tftp:/etc/random.seed:…

QEMU is perhaps best known for the ability to emulate various architectures, but it also has wide support for the native Linux and Mac hypervisors.

For large data sets, home directories, or backups, ZFS has a wide range of supurb features.

Among the brilliant features of WireGuard is the ability to classify traffic based on peer public keys.

If a local network is secure, we can easily configure a local registry without having to manage TLS certificates $ kubectl get svc -o wide registry NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR registry ClusterIP None

After bootstrapping up a basic Kubernetes Lab, a dynamic routing protocol provides effective routing at all layers because each router and switch understands how to route traffic effectively # ospfctl show rib Destination Nexthop Path T…

Also known as pivot tables, distributing categories across colums is a very intuative way to display query results.

I first configured IPv6 Internet access at my home in 2003.

awk is a processing language with a man page that can be printed on eight sheets of paper.

In my view, the most significant feature missing from PostgreSQL is the ability to create views without hard dependencies.

ZFS has a truly unique combination of features ZFS is able to distribute data across multiple devices, and this format is portable.

For many reasons it is useful to store arbitrary nested key-value and array data in JSON.

Puppeteer is a Node.js library which provides an API to control Chromium using the DevTools Protocol.

Declarative partitioning in enables the PostgreSQL query planner to optimize queries in several ways, most notably by pruning partitions that are irrelevant for the query.

For FreeBSD, the ability to PXE boot BIOS and UEFI systems is not new, but documentation frequently assumes an NFS mounted root file system.

One of the most useful skills a Systems Engineer employees is a method of keeping personal notes.

In software or systems engineering, the ability to spin up virtual machines is a valuable capability.

These are operations that I commonly use to aid supporting PostgreSQL databases.

Ubuntu supports major version upgrades using the do-release-upgrade utility, but in my experience this is not a reliable means of updating the operating system.

Any time a task needs to be repeated it is a good candidate for automation.

sidecomment.io is a service that allows readers to select text and create a ticket with suggestions or corrections that the site owner can respond to.

I first posted my notes on using OpenBSD as my workstation in of 2013, but I probably switched from Arch Linux in 2005.

JSON Web Tokens (JWT) provide a standardized representation of claims to be transferred between two parties.

Modern web browsers all allow REST interfaces to external services depends on using a request-response standard called Cross-Origin Resource Sharing.

Some virtual private server providers support OpenBSD as an install target.

There are two reasons I have found it advantageous to synchronize local user accounts to an SQL lookup table: Databases frequently keep records based on the user who ran a task; a users table allows you to write queries that include or exclude certain gro…

SQL databases provide a critical service by giving the application globally consistent access to data, but logical replication makes it possible to trade in the guarantee that a query always reads the most recent write for other features.

The PostgreSQL server does not have a feature called "autocomit", but the most popular database library for Python, psycopg2 has it enabled by default.

Haml is an templating language for writing HTML.

OpenBSD has a very good story for automated installations, which includes features such as: Boot parameters set on boot (example: switch to serial port) Configuration of network interfaces Partitioning & adaptive disklabels Selection and installation of b…