Category: kubernetes

How to Return Custom Response Headers with Nginx Ingress in Kubernetes This method is useful when you have multiple Ingresses and want to confirm which one is responding.

If you encounter the error "no matches for kind 'CronJob' in version 'batch/v1beta1'" when registering a Kubernetes CronJob, you can resolve it by changing batch/v1beta1 to batch/v1.

When `docker run -it` over an `ssh` connection errors `the input device is not a TTY`, drop `-t` or invoke ssh with `-t` to allocate a TTY.

Checklist of timeout settings (Ingress, uWSGI, Django, nginx) to verify so slow responses don't get cut off in a Kubernetes + uWSGI stack.

Make `X-Forwarded-For` / `X-Real-IP` reflect the real client IP through Kubernetes nginx-ingress instead of the cluster-internal IP.

Deploy a locally built Docker image directly to a remote microk8s cluster via `ctr` (containerd CLI), without going through a registry.

Migrate a Kubernetes Ingress from `extensions/v1beta1` to `networking.k8s.io/v1`, with YAML examples. The `backend` field structure must be rewritten.

Bottle's SimpleTemplate basics, plus how to switch to Jinja2 / Mako templates inside Python's bottle framework.

Notes on using `pipenv install --system --skip-lock` to install dev versions without strict locking, and how to run without a Pipfile.lock.

When `kubectl rollout restart` makes Pods take too long to restart, check `terminationGracePeriodSeconds` and any preStop hooks — both are common bottlenecks.

Notes on porting a JAN code check-digit validation script from ASP.NET / JavaScript to PHP, with a working PHP sample.

Install ChromeDriver 126 on Ubuntu 22.04 and run Selenium against it — apt + manual download steps, plus matching the Chromium / Chrome version.

Detect that an element does not exist with Pyppeteer — catch the `waitForSelector` timeout and return `None`.

Install k3s (a lightweight Kubernetes distribution) on a Raspberry Pi (Raspbian) and bring up a single-node cluster — step-by-step.

Open a specific 1Password item directly from the Mac terminal with `open 'onepassword://...'` — also how to get the item URL.