Add ability to read rules files from directories #348
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When the argument to -r <path> or an entry in falco.yaml's rules_file list is a directory, read all files in the directory and add them to the rules file list. The files in the directory are sorted alphabetically before being added to the list. The installed falco adds directories /etc/falco/rules.available and /etc/falco/rules.d and moves /etc/falco/application_rules.yaml to /etc/falco/rules.available. /etc/falco/rules.d is empty, but the idea is that admins can symlink to /etc/falco/rules.available for applications they want to enable. This will make it easier to add application-specific rulesets that admins can opt-in to.
Copy the rules/trace file from the test multiple_rules to a new test
rules_directory. The rules files are in rules/rules_dir/{000,001}*.yaml,
and the test uses a rules_file argument of rules_dir. Ensure that the
same events are detected.
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When the argument to -r or an entry in falco.yaml's rules_file
list is a directory, read all files in the directory and add them to the
rules file list. The files in the directory are sorted alphabetically
before being added to the list.
The installed falco adds directories /etc/falco/rules.available and
/etc/falco/rules.d and moves /etc/falco/application_rules.yaml to
/etc/falco/rules.available. /etc/falco/rules.d is empty, but the idea is
that admins can symlink to /etc/falco/rules.available for applications
they want to enable.
This will make it easier to add application-specific rulesets that
admins can opt-in to.
This fixes #187.