96 lines
2.9 KiB
Markdown
96 lines
2.9 KiB
Markdown
|
# mysql
|
|||
|
|
|
|||
|
|
mysql 监控采集插件，核心原理就是连到 mysql 实例，执行一些 sql，解析输出内容，整理为监控数据上报。
|
|||
|
|
|
|||
|
|
## Configuration
|
|||
|
|
|
|||
|
|
```toml
|
|||
|
|
# # collect interval
|
|||
|
|
# interval = 15
|
|||
|
|
|
|||
|
|
# 要监控 MySQL，首先要给出要监控的MySQL的连接地址、用户名、密码
|
|||
|
|
[[instances]]
|
|||
|
|
address = "127.0.0.1:3306"
|
|||
|
|
username = "root"
|
|||
|
|
password = "1234"
|
|||
|
|
|
|||
|
|
# # set tls=custom to enable tls
|
|||
|
|
# parameters = "tls=false"
|
|||
|
|
|
|||
|
|
# 通过 show global status监控mysql，默认抓取一些基础指标，
|
|||
|
|
# 如果想抓取更多global status的指标，把下面的配置设置为true
|
|||
|
|
extra_status_metrics = true
|
|||
|
|
|
|||
|
|
# 通过show global variables监控mysql的全局变量，默认抓取一些常规的
|
|||
|
|
# 常规的基本够用了，扩展的部分，默认不采集，下面的配置设置为false
|
|||
|
|
extra_innodb_metrics = false
|
|||
|
|
|
|||
|
|
# 监控processlist，关注较少，默认不采集
|
|||
|
|
gather_processlist_processes_by_state = false
|
|||
|
|
gather_processlist_processes_by_user = false
|
|||
|
|
|
|||
|
|
# 监控各个数据库的磁盘占用大小
|
|||
|
|
gather_schema_size = true
|
|||
|
|
|
|||
|
|
# 监控所有的table的磁盘占用大小
|
|||
|
|
gather_table_size = false
|
|||
|
|
|
|||
|
|
# 是否采集系统表的大小，通过不用，所以默认设置为false
|
|||
|
|
gather_system_table_size = false
|
|||
|
|
|
|||
|
|
# 通过 show slave status监控slave的情况，比较关键，所以默认采集
|
|||
|
|
gather_slave_status = true
|
|||
|
|
|
|||
|
|
# # timeout
|
|||
|
|
# timeout_seconds = 3
|
|||
|
|
|
|||
|
|
# # interval = global.interval * interval_times
|
|||
|
|
# interval_times = 1
|
|||
|
|
|
|||
|
|
# 如果要复用Grafana的大盘，Grafana的大盘一般使用instance标识的，
|
|||
|
|
# 建议为mysql实例附一个instance的标签
|
|||
|
|
# important! use global unique string to specify instance
|
|||
|
|
# labels = { instance="n9e-10.2.3.4:3306" }
|
|||
|
|
|
|||
|
|
## Optional TLS Config
|
|||
|
|
# use_tls = false
|
|||
|
|
# tls_min_version = "1.2"
|
|||
|
|
# tls_ca = "/etc/categraf/ca.pem"
|
|||
|
|
# tls_cert = "/etc/categraf/cert.pem"
|
|||
|
|
# tls_key = "/etc/categraf/key.pem"
|
|||
|
|
## Use TLS but skip chain & host verification
|
|||
|
|
# insecure_skip_verify = true
|
|||
|
|
|
|||
|
|
# 自定义SQL，指定SQL、返回的各个列那些是作为metric，哪些是作为label
|
|||
|
|
# [[instances.queries]]
|
|||
|
|
# mesurement = "users"
|
|||
|
|
# metric_fields = [ "total" ]
|
|||
|
|
# label_fields = [ "service" ]
|
|||
|
|
# # field_to_append = ""
|
|||
|
|
# timeout = "3s"
|
|||
|
|
# request = '''
|
|||
|
|
# select 'n9e' as service, count(*) as total from n9e_v5.users
|
|||
|
|
# '''
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 监控多个实例
|
|||
|
|
|
|||
|
|
大家最常问的问题是如何监控多个mysql实例，实际大家对toml配置学习一下就了解了，`[[instances]]` 部分表示数组，是可以出现多个的，所以，举例：
|
|||
|
|
|
|||
|
|
```toml
|
|||
|
|
[[instances]]
|
|||
|
|
address = "10.2.3.6:3306"
|
|||
|
|
username = "root"
|
|||
|
|
password = "1234"
|
|||
|
|
labels = { instance="n9e-10.2.3.6:3306" }
|
|||
|
|
|
|||
|
|
[[instances]]
|
|||
|
|
address = "10.2.6.9:3306"
|
|||
|
|
username = "root"
|
|||
|
|
password = "1234"
|
|||
|
|
labels = { instance="zbx-10.2.6.9:3306" }
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 监控大盘和告警规则
|
|||
|
|
|
|||
|
|
本 README 的同级目录，大家可以看到 dashboard.json 就是监控大盘，导入夜莺就可以使用，alerts.json 是告警规则，也是导入夜莺就可以使用。
|