prometheus详解1

一、start、reload 与 shutdown

1、启动prometheus 进程

nohup ./prometheus --config.file=prometheus.yml > prometheus.log  2>&1 &

2、重载prometheus配置文件（reload）

kill -s SIGHUP <PID>

3、优雅的shutdown一个prometheus 进程实例

kill -s SIGTERM <PID>

二、 prometheus 启动参数详解

选项	默认值	描述
-h --help		帮助
–version		打印版本
–config.file	prometheus.yaml	配置文件路径，主要是配置抓取的endpoint的配置，即prometheus.yaml配置文件
–web.listen-address	0.0.0.0:9090	监听端口即web UI 端监听端口和 API端监听端口
–web.enable-lifecycle	false	启用通过http来reload配置文件和shutdown服务的功能
–web.enable-admin-api	false	启用HTTP API管理控制
–web.page-title	Prometheus Time Series Collection and Processing Server	prometheus 服务实例的title
–web.console.templates	consoles	console template(管理端静态页面路径)
–query-timout	2m	一次查询的最大超时时间，默认2分钟（2m）,只适用于server mode下
–query.max-concurrency	20	最大并发查询数量，默认20，只适用于server mode下 超出的并发数量会怎么样？
–log.level	info	日志等级，默认info，可选值为[debug,info,warn,error]
–log.format	logfmt	日志格式，默认logfmt 可选值[logfmt,json]

三、实践

1、–web.enable-lifecycle

启用通过http来reload配置文件和shutdown服务的功能

# reload配置文件，并不会重启服务
 curl -X PUT http://10.240.184.81:9090/-/reload
 # shutdown服务
 curl -X PUT http://10.240.184.81:9090/-/quit

2、–web.page-title

默认值 Prometheus Time Series Collection and Processing Server

可以通过设置 –web.page-title=hello改成 hello

3、–web.enable-admin-api 启用HTTP API管理控制

[kyzjj@yyzc-zjjcs04 ~]$ curl -X GET  http://10.240.184.81:9090/-/healthy
Prometheus Server is Healthy.
[kyzjj@yyzc-zjjcs04 ~]$
[kyzjj@yyzc-zjjcs04 ~]$ curl -X GET  http://10.240.184.81:9090/-/ready
Prometheus Server is Ready.

[kyzjj@yyzc-zjjcs04 ~]$ curl -X GET  http://10.240.184.81:9090/api/v1/query?query=node_filesystem_files_free
{"status":"success","data":{"resultType":"vector","result":[{"metric":{"__name__":"node_filesystem_files_free","device":"/dev/mapper/vg_app-lv_kyzjj","fstype":"xfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/kyzjj"},"value":[1709356667.786,"20940287"]},{"metric":{"__name__":"node_filesystem_files_free","device":"/dev/mapper/vg_root-lv_root","fstype":"xfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/"},"value":[1709356667.786,"15433370"]},{"metric":{"__name__":"node_filesystem_files_free","device":"/dev/mapper/vg_root-lv_tmp","fstype":"xfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/tmp"},"value":[1709356667.786,"10485744"]},{"metric":{"__name__":"node_filesystem_files_free","device":"/dev/vda1","fstype":"xfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/boot"},"value":[1709356667.786,"1048246"]},{"metric":{"__name__":"node_filesystem_files_free","device":"rootfs","fstype":"rootfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/"},"value":[1709356667.786,"15433370"]},{"metric":{"__name__":"node_filesystem_files_free","device":"tmpfs","fstype":"tmpfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/run"},"value":[1709356667.786,"483795"]},{"metric":{"__name__":"node_filesystem_files_free","device":"tmpfs","fstype":"tmpfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/run/user/0"},"value":[1709356667.786,"485287"]},{"metric":{"__name__":"node_filesystem_files_free","device":"tmpfs","fstype":"tmpfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/run/user/2411"},"value":[1709356667.786,"485285"]},{"metric":{"__name__":"node_filesystem_files_free","device":"tmpfs","fstype":"tmpfs","instance":"localhost:9100","job":"prometheus---node","mountpoint":"/run/user/370"},"value":[1709356667.786,"485287"]}]}}[kyzjj@yyzc-zjjcs04 ~]

4、使用本地时区

prometheus默认使用UTC+0时区，但是中国使用东八区时区即UTC+8，可以设置使用本地时区，设置方式如下：