chore: add parameters for zookeeper

addons/zookeeper/config/zookeeper-config-constraint.cue

@@ -29,16 +29,14 @@
 	"clientPort": int & >=1 & <=65535 | *2181
 
 	// Limits the number of concurrent connections (at the socket level) that a single client, identified by IP address, may make to a single member of the ZooKeeper ensemble. This is used to prevent certain classes of DoS attacks, including file descriptor exhaustion. The default is 60. Setting this to 0 entirely removes the limit on concurrent connections.
-	"maxClientCnxns"?: int
+	"maxClientCnxns"?: int & >=0 & <=2000 | *60
 
 	// New in 3.3.0: the maximum session timeout in milliseconds that the server will allow the client to negotiate.
-	"maxSessionTimeout"?: int
+	"maxSessionTimeout"?: int & >=1 & <=600000 | *20
 
-	// New in 3.4.0: When enabled, ZooKeeper auto purge feature retains the autopurge.snapRetainCount most recent snapshots and the corresponding transaction logs in the dataDir and dataLogDir respectively and deletes the rest. Defaults to 3. Minimum value is 3.
-	"autopurge.snapRetainCount"?: int
-
-	// New in 3.4.0: The time interval in hours for which the purge task has to be triggered. Set to a positive integer (1 and above) to enable the auto purging. Defaults to 0.
-	"autopurge.purgeInterval"?: int
+	// The minimum session timeout in milliseconds that the server will allow the client to negotiate.
+  // Default is 2 times the tickTime. Maximum should be 20 times the tickTime.
+  "minSessionTimeout": int & >=1 & <=600000 | *2
 
 	// the location where ZooKeeper will store the in-memory database snapshots and, unless specified otherwise, the transaction log of updates to the database.Be careful where you put the transaction log. A dedicated transaction log device is key to consistent good performance. Putting the log on a busy device will adversely effect performance.
 	"dataDir": string | *"/zookeeper/data"
@@ -54,4 +52,20 @@
 
 	// A list of comma separated Four Letter Words commands that user wants to use
 	"4lw.commands.whitelist": string | *"srvr, mntr, ruok, conf"
+
+	// The time interval in hours for which the purge task has to be triggered. Set to a positive integer (1 and above) to enable the auto purging. Defaults to 0.
+	"autopurge.purgeInterval": int & >=0 | *0
+
+  // The number of requests that can be queued by ZooKeeper.
+  // Default is 1000. Increase this if dealing with large bursts of requests.
+  "globalOutstandingLimit": int & >=1 & <=20000 | *1000
+
+	// The time in milliseconds that ZooKeeper waits before starting shutdown when a shutdown is requested.
+  // Default is 5000ms (5 seconds). This allows pending requests to complete.
+  "preAllocSize": int & >=1 & <=100000 | *65536
+
+  // The number of snapshots to retain in dataDir.
+  // Default is 3. Minimum value is 3 for recovery purposes.
+  "autopurge.snapRetainCount": int & >=3 & <=30 | *3
+
 }

addons/zookeeper/config/zookeeper-config.tpl

@@ -17,17 +17,21 @@ clientPort=2181
 # the maximum number of client connections.
 # increase this if you need to handle more clients
 maxClientCnxns=500
+# the maximum session timeout that the server  allow the client to negotiate
+maxSessionTimeout=20
+# the minimum session timeout that the server  allow the client to negotiate
+minSessionTimeout=2
 #
 # Be sure to read the maintenance section of the
 # administrator guide before turning on autopurge.
 #
 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
 #
 # The number of snapshots to retain in dataDir
-#autopurge.snapRetainCount=3
+autopurge.snapRetainCount=3
 # Purge task interval in hours
 # Set to "0" to disable auto purge feature
-#autopurge.purgeInterval=1
+autopurge.purgeInterval=0
 
 ## Metrics Providers
 #