Azure naming · Microsoft.ContainerInstance/containerGroups

ci Container instance

An Azure Container Instances container group.

Naming constraints

CAF abbreviationci
Resource typeMicrosoft.ContainerInstance/containerGroups
Length1–63 characters
CaseLowercase only
Allowed charactersLowercase letters, numbers, and hyphens. Can't start or end with a hyphen; no consecutive hyphens.
Uniqueness Resource group
SeparatorHyphen

Source: Microsoft Learn, “Naming rules and restrictions for Azure resources”, checked October 2026. Abbreviation from the Cloud Adoption Framework.

Example & copy-ready

A worked name for workload app, env prod, region weu, instance 001.

Example name
ci-app-prod-weu-001 Valid
Validation regex for CI checks or pre-commit hooks (.NET and JavaScript) 
^(?=.{1,63}$)(?!.*--)[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$
Bicep naming expression 
var name = take(toLower('ci-${workload}-${env}-${region}-${instance}'), 63)
Terraform local 
locals {
  name = substr(lower(join("-", compact(["ci", var.workload, var.env, var.region, var.instance]))), 0, 63)
}

Azure Policy can't evaluate regular expressions, so a policy can check the ci prefix but not the full format. Run the regex in your pipeline, or audit existing names on a schedule.

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Uniqueness scope

Unique within the parent resource group. The same name can be reused in a different resource group.

Open in the name generator

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