Exec probe

As explained in Kubernetes for Developers

A command-based probe is a Kubernetes probe that runs a command in a container and evaluates its exit status.

How Kubernetes for Developers covers it

How deep it goes

Explains exit-status semantics and gives a heartbeat-file implementation with worker, script, and Deployment configuration.

Examples

Uses a worker timestamp file, a Bash freshness script, and a Kubernetes Deployment probe.

What you can do after

Configure an exec-based liveness check for a background worker and tune its freshness and probe timing.

How it connects

Connects liveness probes with background tasks, restart policies, readiness probes, and container health.

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Also explained in

• 

  liveBookmanning.com
  Kubernetes in Action, Second EditionAn exec probe is a Kubernetes liveness-check mechanism that runs a command inside a container and succeeds when the command exits with code zero before its timeout.

Compare how 2 books explain exec probe →

Related concepts

• liveness checkkind of · A liveness check is an automated health test that determines whether a running workload remains functional or should be restarted.
• readiness checkkind of · A readiness check is a health probe that determines whether a running service or workload is prepared to receive requests or traffic.
• shell scriptuses · Bash is a Unix command-line shell and scripting language for executing commands interactively and through scripts.
• http get probealternative to · An HTTP GET probe is a Kubernetes liveness-check mechanism that sends an HTTP GET request to a specified path and port in a container and succeeds for a non-error response.
• file systemuses · A file system is a software-managed structure and interface for organizing, naming, storing, and accessing files and directories on storage.
• thresholdconfigured by · A threshold is a boundary value against which a quantity is compared to determine whether a condition is met or an action or decision is triggered.

This explainer was generated by Manning's knowledge graph from the text of Kubernetes for Developers. The section links point to the parts of the book it draws on.