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+self-test image
+===
+
+This image is used by the Metropolis E2E tests to perform some cluster-internal
+tests. See //metropolis/test/e2e:main_test.go for usage.
+
+The image should be run as a Kubernetes Job, and should return 0 if all tests
+have passed. If the job fails, its last log line will be printed.
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