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Xavier

@xalexander.io

DevSecOps Engineer | Learning In Public ☸ #TechWithX https://xalexander.io

22
Followers 17
Following 91
Posts 02.02.2025
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Latest posts by Xavier @xalexander.io

4xx Error Guide While troubleshooting an error, my coworker said, "Oh, that's 4xx, so that's a client error". I never approached troubleshooting like this. I just knew that 200s were good, and 500s were bad 😅.…

4xx Error Guide ⚠️
#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes #technology

13.02.2026 14:50 👍 2 🔁 0 💬 0 📌 0

Keeping up with new image or package releases can feel overwhelming fast. Here are some methods that might be helpful!

xalexander.io/how-to-keep-track-of-new-releases/

#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes #technology

06.02.2026 14:50 👍 2 🔁 0 💬 0 📌 0

Literally 0 interest in trying Clawdbot 😅

#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #technology

06.02.2026 10:48 👍 3 🔁 0 💬 0 📌 0

I Didn't Know What TLS Termination Was...Until Now

xalexander.io/tls-terminat...

#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes #technology

28.01.2026 14:50 👍 3 🔁 0 💬 0 📌 0

Load balancers and proxies often get lumped together, but they solve very different problems at different points in the request journey.

xalexander.io/load-balancers-vs-proxies/

#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes #technology

20.01.2026 14:50 👍 2 🔁 0 💬 0 📌 0

A Bitbucket Migration Resulting In Missing Commits 🫨
xalexander.io/missing-commits/

#DevOps #k8s #learnk8s #git #100DaysOfCode #kubernetes #technology

13.01.2026 13:18 👍 1 🔁 0 💬 0 📌 0

Reflecting on lessons learned in 2025 as a DevSecOps Engineer.
https://xalexander.io/2025/12/29/5-lessons-learned-as-a-devsecops-engineer-in-2025/

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #Career #Docker

29.12.2025 13:47 👍 1 🔁 0 💬 0 📌 0
SadServers - Linux & DevOps Troubleshooting Interviews Linux Troubleshooting Interview DevOps SRE

Another great resource to keep the skills sharp. You get a remote server with a problem, and your goal is to fix it.

sadservers.com

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

24.11.2025 09:43 👍 5 🔁 0 💬 0 📌 0

When someone is questioning your reasoning, it’s usually not personal. Curiosity isn’t criticism. 💡

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

22.11.2025 23:32 👍 4 🔁 0 💬 0 📌 0
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This made me laugh out loud. Soooo accurate 🤣

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

21.11.2025 22:55 👍 6 🔁 0 💬 0 📌 0
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Whenever I “mess up” at work, I think of outages like these, and remind myself that my situation could be worse. Glad they're back online ✅

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

18.11.2025 18:48 👍 3 🔁 0 💬 0 📌 0

After many years, I finally purchased a MobaXTerm license 😅

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

17.11.2025 23:53 👍 6 🔁 0 💬 0 📌 0
Preview
a man is laying on his stomach on the ground with the words `` almost ... there '' written on the ground . ALT: a man is laying on his stomach on the ground with the words `` almost ... there '' written on the ground .

Ive been tasked with migrating and containerizing our Atlassian Tools (Bitbucket, Confluence and Jira ). All done with Confluence and Bitbucket. Jira in a few more days.

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX #Docker

15.11.2025 20:45 👍 4 🔁 0 💬 0 📌 0

The “Well, that’s how we’ve always done it.” reason for not pursuing a new initiative should always be challenged. Gotta keep evolving.

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX

10.11.2025 02:09 👍 3 🔁 0 💬 0 📌 0

Some advice from a senior engineer that stuck with me, recently:

“Don’t try to memorize everything. Learn where the docs are and bookmark them.”

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX

09.11.2025 18:32 👍 10 🔁 1 💬 0 📌 0

Some concepts come easy. Some take time. But that "aha" moment? Worth it every time.
For me, recently, this was understanding TLS termination. What was your recent "aha" moment?

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX

09.11.2025 00:00 👍 2 🔁 0 💬 0 📌 0

You sure "rsync -av" keeps files in sync? It only compares the file's size and timestamp. If content changes without either updating, it's skipped. The "--checksum" flag is the real truth-teller.
#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #Linux #Tech #TechWithX

08.11.2025 16:18 👍 2 🔁 0 💬 0 📌 0

Got a crash course in TLS termination, today. The learning never stops ! #Productivity #Tech #DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes #IT

05.11.2025 22:56 👍 3 🔁 0 💬 0 📌 0

To all the "Getting Into DevOps" tutorials that don't have any modules on Networking ..shame on you. Networking is such an important foundation that gets skimmed over, or completely skipped, in a lot of tutorials.

#Tech #DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

05.11.2025 00:26 👍 2 🔁 0 💬 0 📌 0

Switched to Notesnook from Obsidian and haven't looked back!

#Productivity #Tech #DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

04.11.2025 20:28 👍 6 🔁 0 💬 0 📌 0

A year ago I couldn’t tell you what a PVC or ingress was. Today I’m recovering from broken clusters, migrating core services, and — most importantly — actually feeling confident. 🚀

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

17.08.2025 14:14 👍 2 🔁 0 💬 0 📌 0


- Stumbled upon mailgun, and am now using their free tier for my SMTP needs. Which aren't much.
- Deployed Komodo to monitor my docker containers.
#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

17.08.2025 14:14 👍 1 🔁 0 💬 0 📌 0

I was experimenting with Longhorn and accidentally corrupted a few PVCs, including the one for Pi-hole. Since Pi-hole handles DNS inside my cluster, its downtime meant the entire cluster lost DNS. As a result, Infisical couldn’t resolve DNS, and my apps couldn’t access their secrets.

17.08.2025 14:14 👍 0 🔁 0 💬 0 📌 0


- Moved PiHole and Infisical (Secrets Manager) to external VMs outside of my K8s cluster. Not sure why I didn't do this when I initially built my cluster 🤷🏾‍♂️ . So what happened? #DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

17.08.2025 14:14 👍 1 🔁 0 💬 0 📌 0


- Fully migrated my K8s stack to RKE2. Having my apps "GItOps"ed made the process less painful then what it could've been.

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

17.08.2025 14:14 👍 1 🔁 0 💬 0 📌 0

Haven't posted in a while. Just a few update on my learning journey 🧵

#DevOps #learnk8s #100DaysOfCode #100DaysOfDevOps #homelab #kubernetes

17.08.2025 14:13 👍 1 🔁 0 💬 5 📌 0

Upcoming Project:
Migrate my current k8s stack to RKE2.
#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes

04.07.2025 09:42 👍 2 🔁 0 💬 0 📌 0
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Goodby, Homepage.
Hello, Glance
#DevOps #k8s #learnk8s #cncf #100DaysOfCode #100DaysOfDevOps #kubernetes

20.06.2025 23:47 👍 5 🔁 0 💬 0 📌 0

In the end, I resolved it by just manually recreating the secret pihole was looking for.
✅

20.06.2025 00:40 👍 0 🔁 0 💬 0 📌 0

My secrets are managed by External Secrets, which was also failing because it couldn't resolve the dns name for Infisical because.... Pi-hole was down

20.06.2025 00:40 👍 0 🔁 0 💬 1 📌 0