Modify the healtchecks to make them disapear from the logs.

This is not perfect...
- dovecot now complains about waitpid/finding a new process
- postfix is still regularly pinging rspamd / his milter and that
generates a few lines worth of logs each time.

core/admin/Dockerfile

@@ -23,7 +23,7 @@ RUN set -euxo pipefail \
 RUN echo $VERSION >/version
 
 EXPOSE 80/tcp
-HEALTHCHECK CMD curl -skfLo /dev/null http://localhost/sso/login?next=ui.index
+HEALTHCHECK CMD curl -skfLo /dev/null http://localhost/ping
 
 VOLUME ["/data","/dkim"]
 

core/admin/mailu/__init__.py

@@ -5,9 +5,24 @@ import flask
 import flask_bootstrap
 
 from mailu import utils, debug, models, manage, configuration
+from gunicorn import glogging
+import logging
 
 import hmac
 
+class NoPingFilter(logging.Filter):
+    def filter(self, record):
+        if not (record.args['{host}i'] == 'localhost' and record.args['r'] == 'GET /ping HTTP/1.1'):
+            return True
+
+class Logger(glogging.Logger):
+    def setup(self, cfg):
+        super().setup(cfg)
+
+        # Add filters to Gunicorn logger
+        logger = logging.getLogger("gunicorn.access")
+        logger.addFilter(NoPingFilter())
+
 def create_app_from_config(config):
     """ Create a new application based on the given configuration
     """
@@ -69,6 +84,10 @@ def create_app_from_config(config):
     def format_datetime(value):
         return utils.flask_babel.format_datetime(value) if value else ''
 
+    def ping():
+        return ''
+    app.route('/ping')(ping)
+
     # Import views
     from mailu import ui, internal, sso
     app.register_blueprint(ui.ui, url_prefix=app.config['WEB_ADMIN'])

core/admin/start.py

@@ -53,8 +53,11 @@ def test_DNS():
 test_DNS()
 
 start_command=" ".join([
-    "gunicorn --threads ", str(os.cpu_count()),
+    "gunicorn",
+    f"--threads {str(os.cpu_count())}",
     "-b :80",
+    "--logger-class mailu.Logger",
+    "--worker-tmp-dir /dev/shm",
     "--access-logfile -" if (log.root.level<=log.INFO) else "",
     "--error-logfile -",
     "--preload",

core/dovecot/Dockerfile

@@ -16,7 +16,7 @@ COPY start.py /
 RUN echo $VERSION >/version
 
 EXPOSE 110/tcp 143/tcp 993/tcp 4190/tcp 2525/tcp
-HEALTHCHECK --start-period=350s CMD echo QUIT|nc localhost 110|grep "Dovecot ready."
+HEALTHCHECK CMD echo PING|nc -w2 localhost 5001|grep "PONG"
 
 VOLUME ["/mail"]
 

core/dovecot/conf/dovecot.conf

@@ -93,6 +93,13 @@ service auth-worker {
   }
 }
 
+service health-check {
+  executable = script -p health-check.sh
+  inet_listener health-check {
+      port = 5001
+  }
+}
+
 ###############
 # IMAP & POP
 ###############

core/postfix/conf/rsyslog.conf

@@ -31,6 +31,8 @@ module(load="imuxsock")
 # Discard messages from local test requests
 :msg, contains, "connect from localhost[127.0.0.1]"  ~
 :msg, contains, "connect from localhost[::1]"  ~
+:msg, contains, "haproxy read: short protocol header: QUIT"  ~
+:msg, contains, "discarding EHLO keywords: PIPELINING"  ~
 
 {% if POSTFIX_LOG_FILE %}
 # Log mail logs to file

towncrier/newsfragments/2606.misc

@@ -0,0 +1 @@
+Modify the healtchecks to make them disapear from the logs.