运维监控系统之Prometheus-MySQLl监控
2011 年 9 月 25 日
简介
mysqld_exporter是用于获取mysql实例的指标服务。
安装
mysql授权
CREATE USER exporter@localhost identified by "mima"; GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'localhost' WITH MAX_USER_CONNECTIONS 3; flush privileges;
直接通过命令下载就可以了。
wget -t 1000 -c https://github.com/prometheus/mysqld_exporter/releases/download/v0.12.1/mysqld_exporter-0.12.1.linux-amd64.tar.gz tar zxvf mysqld_exporter-0.12.1.linux-amd64.tar.gz -C /opt/ cd /opt/mysqld_exporter-0.12.1.linux-amd64 export DATA_SOURCE_NAME='exporter:mima@(localhost:3306)/' ./mysqld_exporter
这里设置用户名密码是通过环境变量的形式，也可以用配置文件，默认找的配置文件是~/.my.cnf，也可以使用参数–config.my-cnf=”/opt/mysqld_exporter/.my.cnf” 进行设置。
./mysqld_exporter --config.my-cnf="/opt/mysqld_exporter/.my.cnf"
其他参数
usage: mysqld_exporter [] Flags: -h, --help Show context-sensitive help (also try --help-long and --help-man). --exporter.lock_wait_timeout=2 Set a lock_wait_timeout on the connection to avoid long metadata locking. --exporter.log_slow_filter Add a log_slow_filter to avoid slow query logging of scrapes. NOTE: Not supported by Oracle MySQL. --collect.heartbeat.database="heartbeat" Database from where to collect heartbeat data --collect.heartbeat.table="heartbeat" Table from where to collect heartbeat data --collect.info_schema.processlist.min_time=0 Minimum time a thread must be in each state to be counted --collect.info_schema.processlist.processes_by_user Enable collecting the number of processes by user --collect.info_schema.processlist.processes_by_host Enable collecting the number of processes by host --collect.info_schema.tables.databases="*" The list of databases to collect table stats for, or '*' for all --collect.mysql.user.privileges Enable collecting user privileges from mysql.user --collect.perf_schema.eventsstatements.limit=250 Limit the number of events statements digests by response time --collect.perf_schema.eventsstatements.timelimit=86400 Limit how old the 'last_seen' events statements can be, in seconds --collect.perf_schema.eventsstatements.digest_text_limit=120 Maximum length of the normalized statement text --collect.perf_schema.file_instances.filter=".*" RegEx file_name filter for performance_schema.file_summary_by_instance --collect.perf_schema.file_instances.remove_prefix="/var/lib/mysql/" Remove path prefix in performance_schema.file_summary_by_instance --web.listen-address=":9104" Address to listen on for web interface and telemetry. --web.telemetry-path="/metrics" Path under which to expose metrics. --timeout-offset=0.25 Offset to subtract from timeout in seconds. --config.my-cnf="/home/jalright/.my.cnf" Path to .my.cnf file to read MySQL credentials from. --collect.mysql.user Collect data from mysql.user --collect.info_schema.tables Collect metrics from information_schema.tables --collect.info_schema.innodb_tablespaces Collect metrics from information_schema.innodb_sys_tablespaces --collect.info_schema.innodb_metrics Collect metrics from information_schema.innodb_metrics --collect.global_status Collect from SHOW GLOBAL STATUS --collect.global_variables Collect from SHOW GLOBAL VARIABLES --collect.slave_status Collect from SHOW SLAVE STATUS --collect.info_schema.processlist Collect current thread state counts from the information_schema.processlist --collect.perf_schema.tablelocks Collect metrics from performance_schema.table_lock_waits_summary_by_table --collect.perf_schema.eventsstatements Collect metrics from performance_schema.events_statements_summary_by_digest --collect.perf_schema.eventsstatementssum Collect metrics of grand sums from performance_schema.events_statements_summary_by_digest --collect.perf_schema.eventswaits Collect metrics from performance_schema.events_waits_summary_global_by_event_name --collect.auto_increment.columns Collect auto_increment columns and max values from information_schema --collect.binlog_size Collect the current size of all registered binlog files --collect.perf_schema.tableiowaits Collect metrics from performance_schema.table_io_waits_summary_by_table --collect.perf_schema.indexiowaits Collect metrics from performance_schema.table_io_waits_summary_by_index_usage --collect.info_schema.userstats If running with userstat=1, set to true to collect user statistics --collect.info_schema.clientstats If running with userstat=1, set to true to collect client statistics --collect.info_schema.tablestats If running with userstat=1, set to true to collect table statistics --collect.info_schema.schemastats If running with userstat=1, set to true to collect schema statistics --collect.perf_schema.file_events Collect metrics from performance_schema.file_summary_by_event_name --collect.perf_schema.file_instances Collect metrics from performance_schema.file_summary_by_instance --collect.perf_schema.replication_group_member_stats Collect metrics from performance_schema.replication_group_member_stats --collect.perf_schema.replication_applier_status_by_worker Collect metrics from performance_schema.replication_applier_status_by_worker --collect.engine_innodb_status Collect from SHOW ENGINE INNODB STATUS --collect.heartbeat Collect from heartbeat --collect.slave_hosts Scrape information from 'SHOW SLAVE HOSTS' --collect.info_schema.innodb_cmp Collect metrics from information_schema.innodb_cmp --collect.info_schema.innodb_cmpmem Collect metrics from information_schema.innodb_cmpmem --collect.info_schema.query_response_time Collect query response time distribution if query_response_time_stats is ON. --collect.engine_tokudb_status Collect from SHOW ENGINE TOKUDB STATUS --log.level="info" Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal] --log.format="logger:stderr" Set the log target and format. Example: "logger:syslog?appname=bob&local=7" or "logger:stdout?json=true" --version Show application version.
部署服务
直接注册成systemd服务。
``bash
#!/bin/bash
VERSION="0.12.1"
wget -t 100 -c https://github.com/prometheus/mysqld_exporter/releases/download/v${VERSION}/mysqld_exporter-${VERSION}.linux-amd64.tar.gz
if [ ! -e mysqld_exporter-${VERSION}.linux-amd64.tar.gz ]
then
echo "安装包下载失败"
exit 1
fi
tar xvfz mysqld_exporter-${VERSION}.linux-amd64.tar.gz -C /opt/
cd /opt
ln -s mysqld_exporter-${VERSION}.linux-amd64 mysqld_exporter
cat > /etc/systemd/system/mysqld_exporter.service <<EOF
[Unit]
Description=mysqld_exporter
After=network.target
[Service]
Type=simple
WorkingDirectory=/opt/mysqld_exporter
ExecStart=/opt/mysqld_exporter/mysqld_exporter --config.my-cnf="/opt/mysqld_exporter/.my.cnf"
LimitNOFILE=65536
PrivateTmp=true
RestartSec=2
StartLimitInterval=0
Restart=always
[Install]
WantedBy=multi-user.target
EOF
```
systemctl daemon-reload
systemctl enable mysqld_exporter
systemctl start mysqld_exporter
配置prometheus Job
默认端口是9104
- job_name: 'mysqld_exporter' # metrics_path defaults to '/metrics' # scheme defaults to 'http'. static_configs: - targets: ['localhost:9104']
指标展示
指标可以通过prometheus的WebUI进行查看
http://[promethe server ip]:9090
如果需要画图，可以直接使用grafana，有人已经配置好了图形可以通过grafana官方下的dashboard找到mysqld_exporter相关的dashboard就可以直接使用了，配置好prometheus数据源，直接导入grafana就可以直接展示了。
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