AI
Running AI Agent Generated Code Safely: What Actually Contains It
If an agent can run shell commands, you have an arbitrary code execution problem. Here is what each isolation option genuinely protects against.
Networking
x509: certificate signed by unknown authority
Your browser trusts the certificate and your application does not. They use different trust stores, and inside a container there may not be one at all.
Docker
Debugging a Container With No Shell, No curl, and No ps
Distroless and scratch images are great for security and miserable when something breaks. Here is how to investigate a container that ships nothing.
DevOps
Your CI Cache Is Making Builds Slower and Occasionally Wrong
A cache with the wrong key restores nothing and uploads everything. A cache with too broad a key restores stale artifacts. Both are common.
Networking
Your Cache-Control Header Is Probably Wrong
no-cache does not mean do not cache. max-age on a CDN is not what you think. Here is what each directive actually does.
Docker
Containers Share a Kernel and That Is the Whole Story
The difference between a container and a microVM is one sentence long, and almost every isolation decision follows from it.
Kubernetes
ImagePullBackOff vs ErrImagePull: What Each One Means
Two statuses, one underlying problem, and about six causes. Here is how to read the event message and fix the right thing.