[RONDB-845] Load Balancers are getting banned from MySQL servers (#44)

- Increase `max-connect-errors` to 9223372036854775807
- Parameterized `max-connections` and `max-prepared-stmt-count`

Author: Fabio Buso

Chart.yaml

@@ -5,7 +5,7 @@ name: rondb
 
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
-version: 0.6.4
+version: 0.6.5
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application.

files/configs/my.cnf

@@ -2,20 +2,21 @@
 default-character-set = utf8mb4
 
 [mysqld]
-basedir         = /srv/hops/mysql
+basedir                  = /srv/hops/mysql
 {{ if .forBinlogServers -}}
-datadir         = {{ include "rondb.mysqld.binlogServers.dataDir" $ }}
+datadir                  = {{ include "rondb.mysqld.binlogServers.dataDir" $ }}
 {{ else }}
-datadir         = {{ include "rondb.mysqldDataDir" $ }}
+datadir                  = {{ include "rondb.mysqldDataDir" $ }}
 {{ end }}
-port            = 3306
-socket          = {{ include "rondb.dataDir" $ }}/mysql.sock
-bind-address    = 0.0.0.0
-pid-file        = {{ include "rondb.dataDir" $ }}/mysqld.pid
-tmpdir          = /tmp
-max-connections = 512
-max-prepared-stmt-count = 65530
-log-error-verbosity = 3
+port                     = 3306
+socket                   = {{ include "rondb.dataDir" $ }}/mysql.sock
+bind-address             = 0.0.0.0
+pid-file                 = {{ include "rondb.dataDir" $ }}/mysqld.pid
+tmpdir                   = /tmp
+max-connections          = {{ .Values.mysql.config.maxConnections }}
+max-connect-errors       = {{ .Values.mysql.config.maxConnectErrors }}
+max-prepared-stmt-count  = {{ .Values.mysql.config.maxPreparedStmtCount }}
+log-error-verbosity      = 3
 
 # this allows us to run benchmarks
 local_infile = ON

values.schema.json

@@ -837,6 +837,27 @@
                         "additionalProperties": false
                     },
                     "description": "A list of MySQL users and their privileges."
+                },
+                "config": {
+                    "type": "object",
+                    "description": "MySQL configuration options",
+                    "properties": {
+                        "maxConnections": {
+                            "type": "integer",
+                            "description": "Maximum number of connections to the MySQL server.",
+                            "default": 512
+                        },
+                        "maxConnectErrors": {
+                            "type": "string",
+                            "description": "Maximum number of connection errors before the MySQL server blocks the host.",
+                            "default": "9223372036854775807"
+                        },
+                        "maxPreparedStmtCount": {
+                            "type": "integer",
+                            "description": "Maximum number of prepared statements.",
+                            "default": 65530
+                        }
+                    }
                 }
             },
             "required": [

values.yaml

@@ -1,5 +1,5 @@
 # Copyright (c) 2024-2025 Hopsworks AB. All rights reserved.
-
+#
 # This file is auto-generated from the values.schema.json file.
 # The file is also used to generate the GitHub Pages documentation.
 # Schema JSON files allow defining restrictions, enums and references.
@@ -203,6 +203,10 @@ meta:
       name: mysqld-replica-appliers
 mysql:
   clusterUser: helm
+  config:
+    maxConnectErrors: '9223372036854775807'
+    maxConnections: 512
+    maxPreparedStmtCount: 65530
   credentialsSecretName: mysql-passwords
   exporter:
     enabled: false