tl;dr The strict-dynamic source list keyword allows you to simplify your CSP policy by favoring hashes and nonces...

Sidekiq 7 adds a new feature called capsules. Use cases: a chrome queue limited to 1 for e.g. PDF processing...

In Ruby on Rails ActiveRecord::Relation#merge overwrites existing conditions on the same column. This may cause the relation to...

To navigate between test and test subject Rubymine requires you to set the test root sources as Test Sources Root...

If you're using a Redis cache in Rails (e.g. :redis_cache_store), it's possible to configure additional parameters...

Let's say we have posts with an attribute title that is mandatory. Our example feature request is to tag...

A lot of web applications require being called over https, which is a good thing. It's possible to configure...

We will achieve this by creating a block accepting method to optionally create and then lock a .lock File of...

In dieser Card machst du einige Übungsaufgaben um Linux Server mit Ansible zu verwalten. Da es vermutlich zu aufwendig ist...

When a nginx reverse proxy complains about upstreams sending too big headers, tweaking the buffers responsibly can help to prevent...

This is a checklist I use to work on issues. For this purpose I extracted several cards related to the...

Rails partials have a lot of "hidden" features and this card describes some non-obvious usages of Rails Partials.

Not all email clients support external images in all situations, e.g. an image within a link. In some cases, a...

Sometimes I ran across a GitHub merge request of a gem where it was not completely obvious in which version...

Das Standardtool für Monitoring auf AWS ist Cloudwatch. Du hast dir in den AWS Kapiteln Cloudwatch sicherlich schon grundsätzlich angesehen...

Du verstehst was eine Custom Resource ist und warum das nützlich sein kann. Du weißt, was ein Operator ist...

Du verstehst, warum man Healthchecks u.ä. haben möchte. Du weißt auch, dass solche Checks nicht exklusiv für Kubernetes...

Im Kapitel 502 Eine Applikation als Container mit CI pipelines deployen hast du eine Applikation auf AWS deployed. In diesem...

Du weißt, welcher Linux Service für das starten/stoppen/löschen von Containern zuständig ist. Wie wird die Authentifizierung für Requests...

Du verstehst, welche Aufgaben der Kubernetes API Server übernimmt. Du weißt, wie der API Server in das Management des...

If you want to check the configuration of a running JVM process you can use jcmd. List the running processes...

If you have for e.g. a Java application which outputs multiline stack traces inside a container running in kubernetes you...

Using ActiveRecord's #signed_id and .find_signed methods you can create URLs that expire after some time. No conditionals...

In dieser Card geht es um Netzwerke in Kubernetes. Schau noch einmal kurz auf Netzwerke zurück und schau dir die...