Quiz: What command builds a Docker image from a Dockerfile in the current directory?
docker build -t myapp . reads the Dockerfile in the current directory and creates a new container image tagged as myapp .
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docker build -t myapp . reads the Dockerfile in the current directory and creates a new container image tagged as myapp .
A ReplicaSet maintains a stable set of replica Pods. Deployments manage ReplicaSets declaratively and are standard for application rollouts.
Docker Compose uses YAML files ( docker-compose.yml ) to configure application services, networks, and persistent volumes.
A Pod represents a single instance of a running process in your cluster, encapsulating one or more tightly coupled containers, storage resources, and an IP.
Trunk-Based Development encourages short-lived feature branches merged frequently into the central trunk, accelerating continuous integration.
Docker executes Dockerfile commands sequentially and checks its build cache; if a layer changes (e.g. COPY . ), all following layers must be rebuilt .
ConfigMaps hold general configuration data as key-value pairs; Secrets store sensitive data like credentials and TLS keys with restricted access controls.
Blue/Green deployments minimize downtime and risk by spinning up the new release alongside the current version and flipping traffic at the router once validated.