Verify that a Datadog monitor alerts you when pods are not ready to accept traffic for a certain time.

Motivation

Kubernetes features a readiness probe to determine whether your pod is ready to accept traffic. If it isn't becoming ready, Kubernetes tries to solve it by restarting the underlying container and hoping to achieve its readiness eventually. If this isn't working, Kubernetes will eventually back off to restart the container, and the Kubernetes resource remains non-functional.

Structure

First, check that the Datadog monitor responsible for tracking non-ready containers is in an 'okay' state. As soon as one of the containers is crash looping, caused by the crash loop attack, the Datadog monitor should alert and escalate it to your on-call team.

Solution Sketch

• Kubernetes liveness, readiness, and startup probes

Verify that Dynatrace alerts you on pods not being ready to accept traffic for a certain amount of time.

Motivation

Kubernetes features a readiness probe to determine whether your pod is ready to accept traffic. If it isn't becoming ready, Kubernetes tries to solve it by restarting the underlying container and hoping to achieve its readiness eventually. If this isn't working, Kubernetes will eventually back off to restart the container, and the Kubernetes resource remains non-functional.

Structure

First, check that Dynatrace has no problems for an entity and doesn't alert already on non-ready containers. As soon as one of the containers is crash looping, caused by the Steadybit attack crash loop, Dynatrace should detect the problem and alert to ensure your on-call team is taking action.

Solution Sketch

• Kubernetes liveness, readiness, and startup probes

Verify that a Grafana alert rule alerts you when pods are not ready to accept traffic for a certain time.

Motivation

Kubernetes features a readiness probe to determine whether your pod is ready to accept traffic. If it isn't becoming ready, Kubernetes tries to solve it by restarting the underlying container and hoping to achieve its readiness eventually. If this isn't working, Kubernetes will eventually back off to restart the container, and the Kubernetes resource remains non-functional.

Structure

First, check that the Grafana alert rule responsible for tracking non-ready containers is in an 'okay' state. As soon as one of the containers is crash looping, caused by the crash loop attack, the Grafana alert rule should fire and escalate it to your on-call team.

Solution Sketch

• Kubernetes liveness, readiness, and startup probes

Intent

Verify that Instana alerts you that pods are not ready to accept traffic for some time.

Motivation

Kubernetes features a readiness probe to determine whether your pod is ready to accept traffic. If it isn't becoming ready, Kubernetes tries to solve it by restarting the underlying container and hoping to achieve its readiness eventually. If this isn't working, Kubernetes will eventually back off to restart the container, and the Kubernetes resource remains non-functional.

Structure

First, check that Instana has no critical events for an application perspective. As soon as one of the containers is crash looping, caused by the Steadybit attack crash loop, Instana should detect this via a critical event to ensure your on-call team is taking action.

Solution Sketch

• Kubernetes liveness, readiness, and startup probes