写在前面

这个版本是把一些近期积累的PR统一发版，另外就是把 n9e-server 的心跳换成 DB，同时为未来做准备，未来准备支持在页面上配置 datasource，然后n9e-server和datasource的关联关系在页面上完成

后端更新

• support tpls reload by @xiaoziv in https://github.com/ccfos/nightingale/pull/1104
• use slim base image by @xiaoziv in https://github.com/ccfos/nightingale/pull/1105
• Update docker-compose.yaml by @JellyTony in https://github.com/ccfos/nightingale/pull/1107
• optimize error report by @xiaoziv in https://github.com/ccfos/nightingale/pull/1109
• add ping监控指标中文说明 by @nondevops in https://github.com/ccfos/nightingale/pull/1110
• 增加 aws cloudwatch rds metrics 中文信息 by @mofrom in https://github.com/ccfos/nightingale/pull/1111
• 添加告警规则执行日志 by @bbaobelief in https://github.com/ccfos/nightingale/pull/1112
• improve community governance by @laiwei in https://github.com/ccfos/nightingale/pull/1115
• feat: support handle event service api by @710leo in https://github.com/ccfos/nightingale/pull/1113
• read prom url from database by @UlricQin in https://github.com/ccfos/nightingale/pull/1119
• docs: sync pg init sql by @tanxiao1990 in https://github.com/ccfos/nightingale/pull/1122
• feat: alert rule support cate by @710leo in https://github.com/ccfos/nightingale/pull/1123
• Mgmt server cluster name in web by @UlricQin in https://github.com/ccfos/nightingale/pull/1127

前端更新

• feat: stat 图支持选择值字段（是的，可以展示 label value 了）

• feat: 图表标题、描述、链接设置以及分组标题等支持关联大盘变量值（支持 $var 和 ${var} 的写法）

• refactor: 折线图标题和内容间距优化

• refactor: 优化图表 query 输入框，解决未输入完成就触发查询导致接口报错问题

• refactor: 优化大盘变量下拉选择框宽度，尽可能完整展示内容

• fix: 修复切换大盘集群后没有更新大盘数据

• fix: 修复表格渲染报错问题 #175

New Contributors

• @JellyTony made their first contribution in https://github.com/ccfos/nightingale/pull/1107
• @nondevops made their first contribution in https://github.com/ccfos/nightingale/pull/1110
• @mofrom made their first contribution in https://github.com/ccfos/nightingale/pull/1111

SQL

alter table alert_rule add column cate varchar(128) not null default '' after group_id;
alter table alert_mute add column cate varchar(128) not null default '' after group_id;
alter table alert_subscribe add column cate varchar(128) not null default '' after group_id;
alter table alert_cur_event add column cate varchar(128) not null default '' after group_id;
alter table alert_his_event add column cate varchar(128) not null default '' after group_id;

CREATE TABLE `alerting_engines`
(
    `id` int unsigned NOT NULL AUTO_INCREMENT,
    `instance` varchar(128) not null default '' comment 'instance identification, e.g. 10.9.0.9:9090',
    `cluster` varchar(128) not null default '' comment 'target reader cluster',
    `clock` bigint not null,
    PRIMARY KEY (`id`),
    UNIQUE KEY (`instance`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

Full Changelog: https://github.com/ccfos/nightingale/compare/v5.10.3...v5.11.0