Johannes Schnatterer

@schnatterer.info

30 Followers 15 Following

Software engineer, author, speaker. Field CTO of Cloudogu. My particular interests are #k8s, #GitOps, #PlatformEngineering, #o11y, #IaC, #DevOps technical leadership and of course #FLOSS/ #FOSS/ #OSS. I like owning my data and devices.

Image of sandworm Shai-Hulud of the Dune saga. Namesake of the supply chain campaign.

LinkedIn settings showing settings where this setting is enabled:

Data for Generative AI Improvement

Can LinkedIn use your personal data and content you create on LinkedIn to train generative AI models that create content?

Use my data for training content creation AI models

Terminal window showing zsh with tmux and starship and a prompt that shows the time.
Command "sleep 3" returns "took 3s"

Featured graphic: k3d LDAP deployment challenges

Terminal showing command "helm images get prometheus-community/kube-prometheus-stack" and a list of images as output

Diagram showing all parts of GOP
K8s-Cluster containing Vault, External Secrets Operator, Grafana, Prometheus, Ingress-nginx, Argo CD.
Next to it, Cloudogu Ecosystem containing SCM-Manager and Jenkins.

Air-Gapped presenting the challenges:
Argo CD: No fetching helm charts from the internet
K8s Cluster: No fetching images from the internet
Jenkins: No fetching plugins, images, libs, packages, build packs, maven wrapper, etc.
from the internet

Terminal emulator showing this command:
helm unittest . -f unittests/prometheus/scrape_config_selector_test.yaml

And its output

PASS test scrapeConfigSelector unittests/prometheus/scrape_config_selector_test.yaml

Charts: 1 passed, 1 total
Test Suites: 1 passed, 1 total
Tests: 4 passed, 4 total
Snapshot: 0 passed, 0 total
Time: 152.612251ms

An example for blocking access to a path via ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: example-metrics-blocker
namespace: my-ns
labels:
annotations:
acme.cert-manager.io/http01-ingress-class: nginx
kubernetes.io/ingress.class: nginx
kubernetes.io/tls-acme: "true"
# Allow access from within the cluster only
nginx.ingress.kubernetes.io/whitelist-source-range: 10.0.0.0/8
spec:
tls:
- hosts:
- "example.com"
secretName: example-certificate
rules:
- host: "example.com"
http:
paths:
- path: /metrics
pathType: Prefix
backend:
service:
name: my-svc
port:
number: 8080

ArtifactHub Page of Helm Chart bitnami/mongodb showing: "Sorry, the package you requested was not found."

Gartner Hype Cycle Diagram for Emerging Technologies 2024, showing, among other things, GitOps almost in the center, almost at the top of the Peak of inflated expectations, color-coded in white, which means Plateau will be reached in <2 years.