50 Kubernetes Concepts Every Devops Engineer Should Know Link Free Pdf «iPad»

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Managing application state, environment variables, and persistent data. 31. ConfigMap

A highly available, consistent, key-value store used as Kubernetes' backing store for all cluster data.

The foundation of every Kubernetes cluster is split between the (the "brain") and Worker Nodes (where applications run). Cluster Architecture | Kubernetes Want to keep this reference guide handy at all times

The safety net. It ensures that a specified number of identical pod replicas are running at any given time. 14. Deployment

While the is the atomic unit, a DevOps engineer lives in the abstractions above it:

: Automating the dynamic provisioning of cloud volumes. 5. Advanced Operations & Security Cluster Architecture | Kubernetes The safety net

: A worker machine (VM or physical machine) in Kubernetes.

Determines if an application within a container has started. All other probes are disabled until the startup probe succeeds. 48. Horizontal Pod Autoscaler (HPA)

Injects ConfigMap or Secret data directly into the container processes at runtime. 36. Downward API Job Controller) shipped with Kubernetes.

The "package manager" for Kubernetes. Helm Charts (like nginx-1.2.3.tgz ) bundle YAML files into repeatable, template-driven applications.

The muscle of the cluster. These physical or virtual machines run your containerized applications. 3. kube-apiserver

Ensures that a specified number of pod replicas are running at any given time. 13. Deployment

A daemon that embeds the core control loops (e.g., Node Controller, Job Controller) shipped with Kubernetes.