Identifiersflags: g

Docker Image Tag

Match Docker image references with an explicit tag — e.g. nginx:1.21, mycorp/service:v2.3.1.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
\b[a-z0-9]+(?:[._\-\/][a-z0-9]+)*:[\w.\-]+\b   (flags: g)

Raw source: \b[a-z0-9]+(?:[._\-\/][a-z0-9]+)*:[\w.\-]+\b

How it works

Image name is lowercase alphanumerics with optional . _ - / separators for registry paths. Tag follows the colon and can include letters, digits, dots, hyphens, and underscores.

Examples

Input

FROM nginx:1.21

Matches

  • nginx:1.21

Input

image: mycorp/service:v2.3.1

Matches

  • mycorp/service:v2.3.1

Input

ubuntu:latest

Matches

  • ubuntu:latest

Common use cases

  • •Dockerfile auditing
  • •CI pipeline image pinning
  • •Vulnerability scanning input
  • •Deployment manifest validation

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