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mysql_config.go
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mysql_config.go
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/*
Copyright 2023 The Vitess Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// This codebase originates from https://github.com/github/freno, See https://github.com/github/freno/blob/master/LICENSE
/*
MIT License
Copyright (c) 2017 GitHub
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
package config
import (
"sync/atomic"
)
//
// MySQL-specific configuration
//
// MySQLClusterConfigurationSettings has the settings for a specific MySQL cluster. It derives its information
// from MySQLConfigurationSettings
type MySQLClusterConfigurationSettings struct {
MetricQuery string // override MySQLConfigurationSettings's, or leave empty to inherit those settings
CacheMillis int // override MySQLConfigurationSettings's, or leave empty to inherit those settings
ThrottleThreshold *atomic.Uint64 // override MySQLConfigurationSettings's, or leave empty to inherit those settings
Port int // Specify if different than 3306 or if different than specified by MySQLConfigurationSettings
IgnoreHostsCount int // Number of hosts that can be skipped/ignored even on error or on exceeding thresholds
IgnoreHostsThreshold float64 // Threshold beyond which IgnoreHostsCount applies (default: 0)
HTTPCheckPort int // Specify if different than specified by MySQLConfigurationSettings. -1 to disable HTTP check
HTTPCheckPath string // Specify if different than specified by MySQLConfigurationSettings
IgnoreHosts []string // override MySQLConfigurationSettings's, or leave empty to inherit those settings
}
// MySQLConfigurationSettings has the general configuration for all MySQL clusters
type MySQLConfigurationSettings struct {
MetricQuery string
CacheMillis int // optional, if defined then probe result will be cached, and future probes may use cached value
ThrottleThreshold *atomic.Uint64
Port int // Specify if different than 3306; applies to all clusters
IgnoreDialTCPErrors bool // Skip hosts where a metric cannot be retrieved due to TCP dial errors
IgnoreHostsCount int // Number of hosts that can be skipped/ignored even on error or on exceeding thresholds
IgnoreHostsThreshold float64 // Threshold beyond which IgnoreHostsCount applies (default: 0)
HTTPCheckPort int // port for HTTP check. -1 to disable.
HTTPCheckPath string // If non-empty, requires HTTPCheckPort
IgnoreHosts []string // If non empty, substrings to indicate hosts to be ignored/skipped
Clusters map[string](*MySQLClusterConfigurationSettings) // cluster name -> cluster config
}