feat: add role fingerprints to syslog

Feature: Add a fingerprint string to the system log to indicate when the role began
successfully, and when the role finished successfully.  The fingerprint string indicates
the role name, a timestamp, and the platform.

Reason: Users can see when the role was used and if it was used successfully.  This
information from the system log can be collected by log scanners and aggregators
for further analysis.

Result: The role logs fingerprints to the system log.

This also adds a test to check if the fingerprints were written upon a successful
role invocation.

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

.sanity-ansible-ignore-2.14.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.16.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.17.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.18.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.19.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.20.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.21.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

.sanity-ansible-ignore-2.22.txt

@@ -0,0 +1 @@
+plugins/modules/sr_fingerprint.py validate-modules:missing-gplv3-license

library/sr_fingerprint.py

@@ -0,0 +1,88 @@
+#!/usr/bin/python
+
+from __future__ import absolute_import, division, print_function
+
+__metaclass__ = type
+
+DOCUMENTATION = """
+---
+module: sr_fingerprint
+short_description: Write a message string to syslog using Ansible C(module.log) function.
+description:
+    - Writes the given string to the system log using Ansible C(module.log) function.
+    - Intended for role-internal or diagnostic use.
+author: Rich Megginson (@richm)
+options:
+    sr_message:
+        description: Text to record in syslog.
+        type: str
+        required: true
+"""
+
+EXAMPLES = """
+- name: Record a fingerprint message in syslog
+  sr_fingerprint:
+    sr_message: "system_role:ROLENAME"
+"""
+
+RETURN = r""" # """
+
+from ansible.module_utils.basic import AnsibleModule
+
+import datetime
+
+
+def _local_iso8601_no_microseconds():
+    """System local wall clock with local tz offset, ISO 8601, seconds only."""
+    try:
+        utc = datetime.timezone.utc
+    except AttributeError:
+        import time
+
+        return time.strftime("%Y-%m-%dT%H:%M:%S%z", time.localtime())
+    # Prefer the local clock interpreted in the system timezone (not UTC displayed).
+    now = datetime.datetime.now()
+    astimezone = getattr(now, "astimezone", None)
+    if astimezone is not None:
+        try:
+            return astimezone().replace(microsecond=0).isoformat()
+        except (OSError, TypeError, ValueError):
+            pass
+    return datetime.datetime.now(utc).astimezone().replace(microsecond=0).isoformat()
+
+
+def run_module():
+    module_args = dict(
+        sr_message=dict(type="str", required=True),
+    )
+
+    module = AnsibleModule(
+        argument_spec=module_args,
+        supports_check_mode=True,
+    )
+
+    log_message = "%s %s" % (
+        module.params["sr_message"],
+        _local_iso8601_no_microseconds(),
+    )
+
+    if module.check_mode:
+        module.exit_json(
+            changed=False,
+            message="Check mode: message not logged - [%s]" % log_message,
+        )
+
+    module.log(log_message)
+
+    # we don't actually change anything, so we're not changed - writing a log message
+    # is not considered a change
+    # also, we don't want to report changed every time the role runs
+    module.exit_json(changed=False)
+
+
+def main():
+    run_module()
+
+
+if __name__ == "__main__":
+    main()

tasks/main.yml

@@ -138,3 +138,9 @@
   when:
     - aide_cron_check is not none
     - not aide_cron_check | bool
+
+- name: Record role success fingerprint
+  sr_fingerprint:
+    sr_message: >-
+      success system_role:aide ansible_version={{ ansible_version.full }}
+      {{ ansible_facts['distribution'] }}-{{ ansible_facts['distribution_version'] }}

tasks/set_vars.yml

@@ -5,6 +5,12 @@
   when: __aide_required_facts |
     difference(ansible_facts.keys() | list) | length > 0
 
+- name: Record role begin fingerprint
+  sr_fingerprint:
+    sr_message: >-
+      begin system_role:aide ansible_version={{ ansible_version.full }}
+      {{ ansible_facts['distribution'] }}-{{ ansible_facts['distribution_version'] }}
+
 - name: Determine if system is ostree and set flag
   when: not __aide_is_ostree is defined
   block:

tests/roles/linux-system-roles.aide/library

@@ -0,0 +1 @@
+../../../library

tests/tests_default.yml

@@ -3,8 +3,25 @@
 - name: Ensure that the role runs with default parameters
   hosts: all
   tasks:
+    - name: Set the start time for the journal search
+      set_fact:
+        __journal_start_time: "{{ ansible_facts['date_time']['date'] ~ ' ' ~ ansible_facts['date_time']['time'] }}"
+
     - name: Run the role
       include_tasks: tasks/run_role_with_clear_facts.yml
+
+    # look for the exact module invocation, not some other message that might contain the string
+    - name: Check system journal contains role fingerprints
+      shell: >-
+        set -eo pipefail;
+        journalctl --since "{{ __journal_start_time }}" --no-pager |
+        grep -v " Invoked with" | grep "sr_fingerprint.*begin system_role:aide" ||
+        { echo ERROR: BEGIN fingerprint not found; exit 1; };
+        journalctl --since "{{ __journal_start_time }}" --no-pager |
+        grep -v " Invoked with" | grep "sr_fingerprint.*success system_role:aide" ||
+        { echo ERROR: SUCCESS fingerprint not found; exit 1; }
+      changed_when: false
+
     - name: Check if the file exists
       ansible.builtin.stat:
         path: /etc/aide.conf