Greenplum Exporter

使用go语言开发的Prometheus Greenplum监控数据采集器。

项目地址：

• Github: https://github.com/ChrisYuan/greenplum_exporter

编译安装：

• 下面以CentOS系统为例演示，其他平台编译方法类似

1.编译方法

1.1 Go环境安装

wget https://gomirrors.org/dl/go/go1.14.12.linux-amd64.tar.gz
tar -C /usr/local -xzf go1.14.12.linux-amd64.tar.gz
export PATH=$PATH:/usr/local/go/bin
go env -w GO111MODULE=on
go env -w GOPROXY=https://goproxy.io,direct

1.2 Exporter编译

git clone https://github.com/ChrisYuan/greenplum_exporter
cd greenplum_exporter/ && make build
cd bin && ls -al

2.采集器使用

2.1 将打包好的软件上传到服务器，通过以下命令行参数启动服务：

export GPDB_DATA_SOURCE_URL=postgres://gpadmin:[email protected]:5432/postgres?sslmode=disable
./greenplum_exporter --web.listen-address="0.0.0.0:5433" --web.telemetry-path="/metrics" --log.level=error --greenplumVersion=gposs6

服务启动后，访问监控指标的URL地址： http://IP:PORT/metrics 确定是否已经开始正常采集指标

其中有几点需要注意：

• 环境变量GPDB_DATA_SOURCE_URL指定了连接Greenplum数据库的连接串（请使用gpadmin账号连接postgres库），该连接串以postgres://为前缀，具体格式如下：

postgres://gpadmin:[email protected]:5432/postgres?sslmode=disable
postgres://[数据库连接账号，必须为gpadmin]:[账号密码，即gpadmin的密码]@[数据库的IP地址]:[数据库端口号]/[数据库名称，必须为postgres]?[参数名]=[参数值]&[参数名]=[参数值]

• 如果环境变量GPDB_DATA_SOURCE_URL中的password含有以下特殊字符，请采用URL编码值替换，否则会报URL无效的错误；

特殊字符	URL编码值
空格	%20
"	%22
#	%23
%	%25
&	%26
(	%28
)	%29
+	%2B
,	%2C
/	%2F
:	%3A
;	%3B
<	%3C
=	%3D
>	%3E
?	%3F
@	%4o
|%5C
管道符	%7C

• --web.listen-address如果不定义，默认端口为5433。详见帮助
• --web.telemetry-path如果不定义，默认为/metrics。详见帮助
• --greenplumVersion如果不定义，默认为gposs6，其他选项还有：gposs5,gpdb6,gpdb5。详见帮助

帮助：

usage: greenplum_exporter [<flags>]

Flags:
  -h, --help                   Show context-sensitive help (also try --help-long and --help-man).
      --web.listen-address="0.0.0.0:5433"
                               web endpoint
      --web.telemetry-path="/metrics"
                               path to expose metrics.
      --disableDefaultMetrics  do not report default metrics(go metrics and process metrics)
      --greenplumVersion="gposs6"
                               greenplum Server Version, options: gposs5-open source greenplum 5.x, gposs6-open source greenplum 6.x, gpdb5-pivotal greenplum 5.x,
                               gpdb6-pivotal greenplum 6.x
      --version                Show application version.
      --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"

2.2 对应的Grafana json位于greenplum_exporter文件夹下，将对应的版本加载到Grafana并调整显示界面即可。

3.支持的监控指标

No.	指标名称	类型	标签组	度量单位	指标描述	数据源获取方法	GP版本
1	greenplum_cluster_state	Gauge	version; master(master主机名)；standby(standby主机名)	boolean	gp 可达状态 ?：1→ 可用;0→ 不可用	SELECT count(*) from gp_dist_random('gp_id'); select version(); SELECT hostname from gp_segment_configuration where content=-1 and role='p';	ALL
2	greenplum_cluster_uptime	Gauge	-	int	启动持续的时间	select extract(epoch from now() - pg_postmaster_start_time());	ALL
3	greenplum_cluster_sync	Gauge	-	int	Master同步Standby状态? 1→ 正常;0→ 异常	SELECT count(*) from pg_stat_replication where state='streaming'	ALL
4	greenplum_cluster_max_connections	Gauge	-	int	最大连接个数	show max_connections; show superuser_reserved_connections;	ALL
5	greenplum_cluster_total_connections	Gauge	-	int	当前连接个数	select count(*) total, count(*) filter(where current_query='') idle, count(*) filter(where current_query<>'') active, count(*) filter(where current_query<>'' and not waiting) running, count(*) filter(where current_query<>'' and waiting) waiting from pg_stat_activity where procpid <> pg_backend_pid();	ALL
6	greenplum_cluster_idle_connections	Gauge	-	int	idle连接数	同上	ALL
7	greenplum_cluster_active_connections	Gauge	-	int	active query	同上	ALL
8	greenplum_cluster_running_connections	Gauge	-	int	query executing	同上	ALL
9	greenplum_cluster_waiting_connections	Gauge	-	int	query waiting execute	同上	ALL
10	greenplum_node_segment_status	Gauge	hostname; address; dbid; content; preferred_role; port; replication_port	int	segment的状态status: 1(U)→ up; 0(D)→ down	select * from gp_segment_configuration;	ALL
11	greenplum_node_segment_role	Gauge	hostname; address; dbid; content; preferred_role; port; replication_port	int	segment的role角色: 1(P)→ primary; 2(M)→ mirror	同上	ALL
12	greenplum_node_segment_mode	Gauge	hostname; address; dbid; content; preferred_role; port; replication_port	int	segment的mode：1(S)→ Synced; 2(R)→ Resyncing; 3(C)→ Change Tracking; 4(N)→ Not Syncing	同上	ALL
13	greenplum_node_segment_disk_free_mb_size	Gauge	hostname	MB	segment主机磁盘空间剩余大小（MB)	SELECT dfhostname as segment_hostname,sum(dfspace)/count(dfspace)/(1024*1024) as segment_disk_free_gb from gp_toolkit.gp_disk_free GROUP BY dfhostname	ALL
14	greenplum_cluster_total_connections_per_client	Gauge	client	int	每个客户端的total连接数	select usename, count() total, count() filter(where current_query='') idle, count(*) filter(where current_query<>'') active from pg_stat_activity group by 1;	ALL
15	greenplum_cluster_idle_connections_per_client	Gauge	client	int	每个客户端的idle连接数	同上	ALL
16	greenplum_cluster_active_connections_per_client	Gauge	client	int	每个客户端的active连接数	同上	ALL
17	greenplum_cluster_total_online_user_count	Gauge	-	int	在线账号数	同上	ALL
18	greenplum_cluster_total_client_count	Gauge	-	int	当前所有连接的客户端个数	同上	ALL
19	greenplum_cluster_total_connections_per_user	Gauge	usename	int	每个账号的total连接数	select client_addr, count() total, count() filter(where current_query='') idle, count(*) filter(where current_query<>'') active from pg_stat_activity group by 1;	ALL
20	greenplum_cluster_idle_connections_per_user	Gauge	usename	int	每个账号的idle连接数	同上	ALL
21	greenplum_cluster_active_connections_per_user	Gauge	usename	int	每个账号的active连接数	同上	ALL
22	greenplum_cluster_config_last_load_time_seconds	Gauge	-	int	系统配置加载时间	SELECT pg_conf_load_time()	Only GPOSS6 and GPDB6
23	greenplum_node_database_name_mb_size	Gauge	dbname	MB	每个数据库占用的存储空间大小	SELECT dfhostname as segment_hostname,sum(dfspace)/count(dfspace)/(1024*1024) as segment_disk_free_gb from gp_toolkit.gp_disk_free GROUP BY dfhostname	ALL
24	greenplum_node_database_table_total_count	Gauge	dbname	-	每个数据库内表的总数量	SELECT count(*) as total from information_schema.tables where table_schema not in ('gp_toolkit','information_schema','pg_catalog');	ALL
25	greenplum_exporter_total_scraped	Counter	-	int	-	-	ALL
26	greenplum_exporter_total_error	Counter	-	int	-	-	ALL
27	greenplum_exporter_scrape_duration_second	Gauge	-	int	-	-	ALL
28	greenplum_server_users_name_list	Gauge	-	int	用户总数	SELECT usename from pg_catalog.pg_user;	ALL
29	greenplum_server_users_total_count	Gauge	-	int	用户明细	同上	ALL
30	greenplum_server_locks_table_detail	Gauge	pid;datname;usename;locktype;mode;application_name;state;lock_satus;query	int	锁信息	SELECT * from pg_locks	ALL
31	greenplum_server_database_hit_cache_percent_rate	Gauge	-	float	缓存命中率	select sum(blks_hit)/(sum(blks_read)+sum(blks_hit))*100 from pg_stat_database;	ALL
32	greenplum_server_database_transition_commit_percent_rate	Gauge	-	float	事务提交率	select sum(xact_commit)/(sum(xact_commit)+sum(xact_rollback))*100 from pg_stat_database;	ALL

4.声明：

• 本项目在 https://github.com/tangyibo/greenplum_exporter 基础上进行开发，部分修改如下：
  • 原作者repo中分别针对gpdb5/6做了不同的分支，这里秉承简洁的原则，进行了GPDB多个版本的合并，您可以通过一个程序采集不同版本GPDB的数据
  • 部分修正
  • 在此对原作者表示感谢
• 如果您在使用过程中有任何疑问，可以在cn.greenplum.org/askgp上提问并@阿福，咨询类问题也可以直接在Greenplum官方技术微信群中@阿福
• 如果本项目有帮助到您，麻烦您star一下～