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Skip Files

Trivy traversals directories and looks for all lock files by default. If your image contains lock files which are not maintained by you, you can skip the file.

$ trivy image --skip-files "/Gemfile.lock" --skip-files "/var/lib/gems/2.5.0/gems/http_parser.rb-0.6.0/Gemfile.lock" quay.io/fluentd_elasticsearch/fluentd:v2.9.0

Skip Directories

Trivy traversals directories and look for all lock files by default. If your image contains lock files which are not maintained by you, you can skip traversal in the specific directory.

$ trivy image --skip-dirs /var/lib/gems/2.5.0/gems/fluent-plugin-detect-exceptions-0.0.13 --skip-dirs "/var/lib/gems/2.5.0/gems/http_parser.rb-0.6.0" quay.io/fluentd_elasticsearch/fluentd:v2.9.0

File patterns

When a directory is given as an input, Trivy will recursively look for and test all files based on file patterns. The default file patterns are here.

In addition to the default file patterns, the --file-patterns option takes regexp patterns to look for your files. For example, it may be useful when your file name of Dockerfile doesn't match the default patterns.

This can be repeated for specifying multiple file patterns.

A file pattern contains the analyzer it is used for, and the pattern itself, joined by a semicolon. For example: 

--file-patterns "dockerfile:.*.docker" --file-patterns "yaml:deployment" --file-patterns "pip:requirements-.*\.txt"

For more details, see an example

Exit Code

By default, Trivy exits with code 0 even when vulnerabilities are detected. Use the --exit-code option if you want to exit with a non-zero exit code.

$ trivy image --exit-code 1 python:3.4-alpine3.9
Result 
2019-05-16T12:51:43.500+0900    INFO    Updating vulnerability database...
2019-05-16T12:52:00.387+0900    INFO    Detecting Alpine vulnerabilities...

python:3.4-alpine3.9 (alpine 3.9.2)
===================================
Total: 1 (UNKNOWN: 0, LOW: 0, MEDIUM: 1, HIGH: 0, CRITICAL: 0)

+---------+------------------+----------+-------------------+---------------+--------------------------------+
| LIBRARY | VULNERABILITY ID | SEVERITY | INSTALLED VERSION | FIXED VERSION |             TITLE              |
+---------+------------------+----------+-------------------+---------------+--------------------------------+
| openssl | CVE-2019-1543    | MEDIUM   | 1.1.1a-r1         | 1.1.1b-r1     | openssl: ChaCha20-Poly1305     |
|         |                  |          |                   |               | with long nonces               |
+---------+------------------+----------+-------------------+---------------+--------------------------------+

This option is useful for CI/CD. In the following example, the test will fail only when a critical vulnerability is found.

$ trivy image --exit-code 0 --severity MEDIUM,HIGH ruby:2.4.0
$ trivy image --exit-code 1 --severity CRITICAL ruby:2.4.0

Reset

The --reset option removes all caches and database. After this, it takes a long time as the vulnerability database needs to be rebuilt locally.

$ trivy image --reset
Result 
2019-05-16T13:05:31.935+0900    INFO    Resetting...