T7756: Fix rsyslog configuration generation

1.) Fix both syslog and logrotate writing /etc/logrotate.d/vyos-rsyslog
- system_syslog.py generates /etc/logrotate.d/vyos-rsyslog-user for user file
  logrotate
- system_logs.py generates /etc/logrotate.d/vyos-rsyslog using configured
  rotation parameters

2.) Fix /run/rsyslog/rsyslog.conf ignoring configured size for /var/log/messages
- system_syslog.py retrieves "system logs" config to set rotation limits
- default rotation size is now based on configuration defaults

3.) prifilt strings for rsyslog are modified to use override syntax
  (e.g. ";facility.none") when all is combined with other facilities to honor
  per facility user intent

Smoke test changes:

Commonize configuration of syslog facilities
Check that prifilt is sane based on configured facilities (i.e. overides only
    present when required)
Test wildcard (all) only, specific facility only, and wildcard + specific facility

2 files changed, 21 insertions, 7 deletions

diff --git a/src/conf_mode/system_logs.py b/src/conf_mode/system_logs.py
index f0e742d1b..f31986034 100755
--- a/src/conf_mode/system_logs.py
+++ b/src/conf_mode/system_logs.py
@@ -19,6 +19,8 @@ from sys import exit
 from vyos import ConfigError
 from vyos import airbag
 from vyos.config import Config
+from vyos.configdep import set_dependents
+from vyos.configdep import call_dependents
 from vyos.logger import syslog
 from vyos.template import render
 from vyos.utils.dict import dict_search
@@ -35,6 +37,8 @@ def get_config(config=None):
     else:
         conf = Config()
 
+    set_dependents('syslog', conf)
+
     base = ['system', 'logs']
     logs_config = conf.get_config_dict(base, key_mangling=('-', '_'),
                                        get_first_key=True,
@@ -64,8 +68,8 @@ def generate(logs_config):
 
 
 def apply(logs_config):
-    # No further actions needed
-    pass
+    # Ensure dependent config scripts (e.g., syslog) are re-run
+    call_dependents()
 
 
 if __name__ == '__main__':
diff --git a/src/conf_mode/system_syslog.py b/src/conf_mode/system_syslog.py
index 90bb45c51..7e5b4f90c 100755
--- a/src/conf_mode/system_syslog.py
+++ b/src/conf_mode/system_syslog.py
@@ -40,7 +40,8 @@ airbag.enable()
 
 cert_dir = '/etc/rsyslog.d/certs'
 rsyslog_conf = '/run/rsyslog/rsyslog.conf'
-logrotate_conf = '/etc/logrotate.d/vyos-rsyslog'
+logrotate_user_conf = '/etc/logrotate.d/vyos-rsyslog-user'
+logrotate_messages_conf = '/etc/logrotate.d/vyos-rsyslog'
 
 systemd_socket = 'syslog.socket'
 systemd_service = systemd_services['syslog']
@@ -124,7 +125,16 @@ def get_config(config=None):
         with_pki=True,
     )
 
-    syslog.update({ 'logrotate' : logrotate_conf })
+    syslog.update({ 'logrotate' : logrotate_messages_conf })
+
+    logs_config = conf.get_config_dict(
+        ['system', 'logs'],
+        key_mangling=('-', '_'),
+        get_first_key=True,
+        with_recursive_defaults=True,
+    )
+    max_size_mb = dict_search('logrotate.messages.max_size', logs_config)
+    syslog['logrotate_size_limit'] = int(max_size_mb) * 1024 * 1024
 
     syslog = conf.merge_defaults(syslog, recursive=True)
     if syslog.from_defaults(['local']):
@@ -192,8 +202,8 @@ def generate(syslog):
     if not syslog:
         if os.path.exists(rsyslog_conf):
             os.unlink(rsyslog_conf)
-        if os.path.exists(logrotate_conf):
-            os.unlink(logrotate_conf)
+        if os.path.exists(logrotate_user_conf):
+            os.unlink(logrotate_user_conf)
 
         return None
 
@@ -203,7 +213,7 @@ def generate(syslog):
                 _save_tls_certificates_for_remote(syslog, remote_options)
 
     render(rsyslog_conf, 'rsyslog/rsyslog.conf.j2', syslog)
-    render(logrotate_conf, 'rsyslog/logrotate.j2', syslog)
+    render(logrotate_user_conf, 'rsyslog/logrotate.j2', syslog)
     return None
 
 def apply(syslog):