Merge pull request #30187 from rallytime/bp-27606

Back-port #27606 to 2015.8

conf/master

@@ -27,31 +27,6 @@
 # modified files cause conflicts, set verify_env to False.
 #user: root
 
-# Max open files
-#
-# Each minion connecting to the master uses AT LEAST one file descriptor, the
-# master subscription connection. If enough minions connect you might start
-# seeing on the console (and then salt-master crashes):
-#   Too many open files (tcp_listener.cpp:335)
-#   Aborted (core dumped)
-#
-# By default this value will be the one of `ulimit -Hn`, ie, the hard limit for
-# max open files.
-#
-# If you wish to set a different value than the default one, uncomment and
-# configure this setting. Remember that this value CANNOT be higher than the
-# hard limit. Raising the hard limit depends on your OS and/or distribution,
-# a good way to find the limit is to search the internet. For example:
-#   raise max open files hard limit debian
-#
-#max_open_files: 100000
-
-# The number of worker threads to start. These threads are used to manage
-# return calls made from minions to the master. If the master seems to be
-# running slowly, increase the number of threads. This setting can not be
-# set lower than 3.
-#worker_threads: 5
-
 # The port used by the communication interface. The ret (return) port is the
 # interface used for the file server, authentication, job returns, etc.
 #ret_port: 4506
@@ -204,6 +179,59 @@
 #   - /etc/salt/extra_config
 
 
+#####  Large-scale tuning settings   #####
+##########################################
+# Max open files
+#
+# Each minion connecting to the master uses AT LEAST one file descriptor, the
+# master subscription connection. If enough minions connect you might start
+# seeing on the console (and then salt-master crashes):
+#   Too many open files (tcp_listener.cpp:335)
+#   Aborted (core dumped)
+#
+# By default this value will be the one of `ulimit -Hn`, ie, the hard limit for
+# max open files.
+#
+# If you wish to set a different value than the default one, uncomment and
+# configure this setting. Remember that this value CANNOT be higher than the
+# hard limit. Raising the hard limit depends on your OS and/or distribution,
+# a good way to find the limit is to search the internet. For example:
+#   raise max open files hard limit debian
+#
+#max_open_files: 100000
+
+# The number of worker threads to start. These threads are used to manage
+# return calls made from minions to the master. If the master seems to be
+# running slowly, increase the number of threads. This setting can not be
+# set lower than 3.
+#worker_threads: 5
+
+# Set the ZeroMQ high water marks
+# http://api.zeromq.org/3-2:zmq-setsockopt
+
+# The publisher interface ZeroMQPubServerChannel
+#pub_hwm: 1000
+
+# These two ZMQ HWM settings, salt_event_pub_hwm and event_publisher_pub_hwm
+# are significant for masters with thousands of minions.  When these are
+# insufficiently high it will manifest in random responses missing in the CLI
+# and even missing from the job cache.  Masters that have fast CPUs and many
+# cores with appropriate worker_threads will not need these set as high.
+
+# On deployment with 8,000 minions, 2.4GHz CPUs, 24 cores, 32GiB memory has
+# these settings:
+#
+#   salt_event_pub_hwm: 128000
+#   event_publisher_pub_hwm: 64000
+
+# ZMQ high-water-mark for SaltEvent pub socket
+#salt_event_pub_hwm: 20000
+
+# ZMQ high-water-mark for EventPublisher pub socket
+#event_publisher_pub_hwm: 10000
+
+
+
 #####        Security settings       #####
 ##########################################
 # Enable "open mode", this mode still maintains encryption, but turns off

salt/config.py

@@ -420,6 +420,11 @@
     # http://api.zeromq.org/3-2:zmq-setsockopt
     'pub_hwm': int,
 
+    # ZMQ HWM for SaltEvent pub socket
+    'salt_event_pub_hwm': int,
+    # ZMQ HWM for EventPublisher pub socket
+    'event_publisher_pub_hwm': int,
+
     # The number of MWorker processes for a master to startup. This number needs to scale up as
     # the number of connected minions increases.
     'worker_threads': int,
@@ -957,12 +962,20 @@
     'sudo_user': '',
     'http_request_timeout': 1 * 60 * 60.0,  # 1 hour
     'http_max_body': 100 * 1024 * 1024 * 1024,  # 100GB
+    # ZMQ HWM for SaltEvent pub socket - different for minion vs. master
+    'salt_event_pub_hwm': 2000,
+    # ZMQ HWM for EventPublisher pub socket - different for minion vs. master
+    'event_publisher_pub_hwm': 1000,
 }
 
 DEFAULT_MASTER_OPTS = {
     'interface': '0.0.0.0',
     'publish_port': '4505',
     'pub_hwm': 1000,
+    # ZMQ HWM for SaltEvent pub socket - different for minion vs. master
+    'salt_event_pub_hwm': 2000,
+    # ZMQ HWM for EventPublisher pub socket - different for minion vs. master
+    'event_publisher_pub_hwm': 1000,
     'auth_mode': 1,
     'user': 'root',
     'worker_threads': 5,

salt/utils/event.py

@@ -296,6 +296,11 @@ def connect_pub(self):
         Establish the publish connection
         '''
         self.sub = self.context.socket(zmq.SUB)
+        try:
+            self.sub.setsockopt(zmq.HWM, self.opts.get('salt_event_pub_hwm'))
+        except AttributeError:
+            self.sub.setsockopt(zmq.SNDHWM, self.opts.get('salt_event_pub_hwm'))
+            self.sub.setsockopt(zmq.RCVHWM, self.opts.get('salt_event_pub_hwm'))
         self.sub.connect(self.puburi)
         self.poller.register(self.sub, zmq.POLLIN)
         self.sub.setsockopt_string(zmq.SUBSCRIBE, u'')
@@ -867,6 +872,11 @@ def run(self):
         self.context = zmq.Context(1)
         # Prepare the master event publisher
         self.epub_sock = self.context.socket(zmq.PUB)
+        try:
+            self.epub_sock.setsockopt(zmq.HWM, self.opts.get('event_publisher_pub_hwm'))
+        except AttributeError:
+            self.epub_sock.setsockopt(zmq.SNDHWM, self.opts.get('event_publisher_pub_hwm'))
+            self.epub_sock.setsockopt(zmq.RCVHWM, self.opts.get('event_publisher_pub_hwm'))
         # Prepare master event pull socket
         self.epull_sock = self.context.socket(zmq.PULL)
         if self.opts.get('ipc_mode', '') == 'tcp':