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README.md

civ - container image verifier

The container image verifier - civ checks based on constraints container images. For this purpose is a config file required which contains the constraint definitions. The config file must be passed as argument to civ. civ writes the results into a separate file.

Currently is json and yaml supported. As default will be yaml used. Optionally can be specified via the second arg the result file.

civ config.yaml [ result.yaml ]

Constraints

Labels

Exists

Verify if container image volkerraschek/civ:latest has label org.opencontainers.image.documentation defined.

images:
  volkerraschek/civ:latest:
    labelConstraints:
      org.opencontainers.image.documentation:
        exists: true

Compare Semantic Versioning

Verify, if the container image volkerraschek/civ:latest has label org.opencontainers.image.version defined and has a greater version than 2.5.7.

images:
  volkerraschek/civ:latest:
    labelConstraints:
      org.opencontainers.image.version:
        compareSemver:
          greaterThan: 2.5.7

Alternatively, can lessThan and equal be used. For example to define a range of 2.5.7~2.8.4 with lessThan and greaterThan.

images:
  volkerraschek/civ:latest:
    labelConstraints:
      org.opencontainers.image.version:
        compareSemver:
          greaterThan: 2.5.7
          lessThan: 2.8.4

Compare String

Verify, if the container image volkerraschek/civ:latest has label org.opencontainers.image.documentation defined and the value starts with https:// and ends with README.md.

images:
  volkerraschek/civ:latest:
    labelConstraints:
      org.opencontainers.image.documentation:
        compareString:
          hasPrefix: "https://"
          hasSuffix: "README.md"

Alternatively, can be equal used to compare the value of a label with a expected value.

Count labels with corresponding prefix, suffix or match pattern

No more than 3 labels with the prefix org.opencontainers and exactly one labels with the suffix version may be defined for the image volkerraschek/civ:latest.

images:
  volkerraschek/civ:latest:
    labelConstraints:
      org.opencontainers%:
        count:
          lowerThan: 4
      %version:
        count:
          equal: 1

The functions lessThan and equal are also available as constraints.