Container

Read the containers of a workload (a Deployment, StatefulSet, Job, Pod, …, through its pod template): images, environment variables, ports and counts, by container index or name.

Reference

Functions

containerCount

containerCount returns the number of containers in the pod spec.

{{ containerCount .deployment }}  → 2

containerEnv

containerEnv returns the value of a named environment variable from the container at the given index.

{{ containerEnv .deployment "APP_ENV" }}  → "production"

containerImage

containerImage returns the container image at the given index.

{{ containerImage .deployment }}    → "nginx:1.25"
{{ containerImage .deployment 1 }}  → "envoyproxy/envoy:v1.30"

containerPort

containerPort returns a containerPort number: by default the first port of the first container; an optional container index and port index choose another. 0 when there is no such port.

{{ containerPort .deployment }}  → 8080

containerPortByName

containerPortByName returns the port number for a named container port. Returns 0 when not found.

{{ containerPortByName .deployment 0 "metrics" }}  → 9090

containerPorts

containerPorts returns the containerPort numbers the container at index exposes.

{{ containerPorts .deployment 0 }}  → [8080 9090]

hasContainerPort

hasContainerPort reports whether the container exposes a specific port number.

{{ hasContainerPort .deployment 0 9090 }}  → true