# init container

CEFR C2 · Compound

Source: https://englishreference.com/word/init-container
Updated: 2026-07-22

## Definition

a special type of computer program that runs and finishes its job before the main application starts. You use it to set up things like databases or security settings so the main program is ready to work.

For teachers: a specialised container that runs to completion before any app containers in a pod are started. It is used to perform initialisation logic, such as seeding a database or configuring network permissions, that must be isolated from the main application runtime.

## Examples

- The init container sets up the database before the app starts.
- The developer configured an init container to download the necessary configuration files from a secure server before the main web server launched.
- By decoupling the setup logic into an init container, the engineering team ensured that the primary application container remained lightweight and lacked the elevated permissions required for the initial environment configuration.

## Usage notes

- Commonly used in the context of Kubernetes and container orchestration; typically defined within a pod specification.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.