grafana/public/app/plugins/datasource/mysql/partials/config.html

<h3 class="page-heading">MySQL Connection</h3>

<div class="gf-form-group">
	<div class="gf-form max-width-30">
		<span class="gf-form-label width-7">Host</span>
		<input type="text" class="gf-form-input" ng-model='ctrl.current.url' placeholder="localhost:3306" bs-typeahead="{{['localhost:3306', 'localhost:3307']}}" required></input>
	</div>

	<div class="gf-form max-width-30">
		<span class="gf-form-label width-7">Database</span>
		<input type="text" class="gf-form-input" ng-model='ctrl.current.database' placeholder="database name" required></input>
	</div>

	<div class="gf-form-inline">
		<div class="gf-form max-width-15">
			<span class="gf-form-label width-7">User</span>
			<input type="text" class="gf-form-input" ng-model='ctrl.current.user' placeholder="user"></input>
		</div>
		<div class="gf-form">
      <secret-form-field
        isConfigured="ctrl.current.secureJsonFields.password"
        value="ctrl.current.secureJsonData.password"
        on-reset="ctrl.onPasswordReset"
        on-change="ctrl.onPasswordChange"
        inputWidth="9"
      />
		</div>
	</div>

  <div class="gf-form max-width-30">
    <span class="gf-form-label width-10">Session Timezone</span>
    <input
            type="text"
            class="gf-form-input gf-form-input--has-help-icon"
            ng-model="ctrl.current.jsonData.timezone"
            spellcheck='false'
            placeholder="(default)"
    ></input>
    <info-popover mode="right-absolute">
      Specify the time zone used in the database session, e.g. <code>Europe/Berlin</code> or <code>+02:00</code>.
      This is necessary, if the timezone of the database (or the host of the database) is set to something other than UTC.
      The value is set in the session with <code>SET time_zone='...'</code>. If you leave this field empty,
      the timezone is not updated. You can find more information in the
      <a href="https://dev.mysql.com/doc/refman/8.0/en/time-zone-support.html">MySQL documentation</a>.
    </info-popover>
  </div>

	<div class="gf-form-group">
		<div class="gf-form-inline">
			<gf-form-checkbox class="gf-form" label="TLS Client Auth" label-class="width-10"
				checked="ctrl.current.jsonData.tlsAuth" switch-class="max-width-6"></gf-form-checkbox>
			<gf-form-checkbox class="gf-form" label="With CA Cert" tooltip="Needed for
				verifing self-signed TLS Certs" checked="ctrl.current.jsonData.tlsAuthWithCACert" label-class="width-11"
				switch-class="max-width-6"></gf-form-checkbox>
		</div>
		<div class="gf-form-inline">
			<gf-form-checkbox class="gf-form" label="Skip TLS Verify" label-class="width-10"
				checked="ctrl.current.jsonData.tlsSkipVerify" switch-class="max-width-6"></gf-form-checkbox>
		</div>
	</div>

<datasource-tls-auth-settings current="ctrl.current" ng-if="(ctrl.current.jsonData.tlsAuth || ctrl.current.jsonData.tlsAuthWithCACert)">
</datasource-tls-auth-settings>

<b>Connection limits</b>

<div class="gf-form-group">
	<div class="gf-form max-width-15">
		<span class="gf-form-label width-7">Max open</span>
		<input type="number" min="0" class="gf-form-input gf-form-input--has-help-icon" ng-model="ctrl.current.jsonData.maxOpenConns" placeholder="unlimited"></input>
		<info-popover mode="right-absolute">
			The maximum number of open connections to the database. If <i>Max idle connections</i> is greater than 0 and the
			<i>Max open connections</i> is less than <i>Max idle connections</i>, then <i>Max idle connections</i> will be
			reduced to match the <i>Max open connections</i> limit. If set to 0, there is no limit on the number of open
			connections.
		</info-popover>
	</div>
	<div class="gf-form max-width-15">
		<span class="gf-form-label width-7">Max idle</span>
		<input type="number" min="0" class="gf-form-input gf-form-input--has-help-icon" ng-model="ctrl.current.jsonData.maxIdleConns" placeholder="2"></input>
		<info-popover mode="right-absolute">
			The maximum number of connections in the idle connection pool. If <i>Max open connections</i> is greater than 0 but
			less than the <i>Max idle connections</i>, then the <i>Max idle connections</i> will be reduced to match the
			<i>Max open connections</i> limit. If set to 0, no idle connections are retained.
		</info-popover>
	</div>
	<div class="gf-form max-width-15">
		<span class="gf-form-label width-7">Max lifetime</span>
		<input type="number" min="0" class="gf-form-input gf-form-input--has-help-icon" ng-model="ctrl.current.jsonData.connMaxLifetime" placeholder="14400"></input>
		<info-popover mode="right-absolute">
			The maximum amount of time in seconds a connection may be reused. If set to 0, connections are reused forever.<br/><br/>
			This should always be lower than configured <a href="https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_wait_timeout" target="_blank">wait_timeout</a> in MySQL.
		</info-popover>
	</div>
</div>

<h3 class="page-heading">MySQL details</h3>

<div class="gf-form-group">
	<div class="gf-form-inline">
		<div class="gf-form">
			<span class="gf-form-label width-9">Min time interval</span>
			<input
        type="text"
        class="gf-form-input width-6 gf-form-input--has-help-icon"
        ng-model="ctrl.current.jsonData.timeInterval"
        spellcheck='false'
        placeholder="1m"
        ng-pattern="/^\d+(ms|[Mwdhmsy])$/"
      ></input>
			<info-popover mode="right-absolute">
				A lower limit for the auto group by time interval. Recommended to be set to write frequency,
				for example <code>1m</code> if your data is written every minute.
			</info-popover>
		</div>
	</div>
</div>

<div class="gf-form-group">
	<div class="grafana-info-box">
		<h5>User Permission</h5>
		<p>
			The database user should only be granted SELECT permissions on the specified database &amp; tables you want to query.
			Grafana does not validate that queries are safe so queries can contain any SQL statement. For example, statements
			like <code>USE otherdb;</code> and <code>DROP TABLE user;</code> would be executed. To protect against this we
			<strong>Highly</strong> recommmend you create a specific MySQL user with restricted permissions.

			Checkout the <a class="external-link" target="_blank" href="http://docs.grafana.org/features/datasources/mysql/">MySQL Data Source Docs</a> for more information.
		</p>
	</div>
</div>