🙍🏽 👰 🤸 Dashboard Postgresql Overview for postgres_exporter (Prometheus) 👴🏽 👩🏻‍🔬 🚴🏻

Made a dashboard Postgresql overview for postgres_exporter .

What is the difference from other postgres_exporter dashboards?

I combined all the other postgres_exporter dashboards into one.

This dashboard shows general information about the cluster.

Screenshots and short installation instructions: postgresql, postgres_exporter, prometheus, grafana under the cat.

Why not use pgwatch2 with influxdb ?

About InfluxDB

1.7 ( , CORE team ):

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breaking changes. 3 5+ ( 0.9 (December 8, 2014)). Breaking Changes — Influx 2.0, \ Buckets, Flux.
, ifql (Flux) Continuous Queries ( task, Flux-) Chronograf( C TICK), .
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— - cli, . restore backup . merge .
TICK( T), , 1.3.2 ( [a-z]). , , Retention Policy (input,output).kafka, .. metrics -> telegraf -> kafka -> telegraf -> influx .
( K TICK), , InfluxDB. RAM , , "", . .

PostgreSQL

yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
yum install -y postgresql96 postgresql96-server postgresql96-contrib

Initialize PostgreSQL.

/usr/pgsql-9.6/bin/postgresql96-setup initdb

In PostgreSQL, add the extension pg_stat_statements to postgresql.conf

shared_preload_libraries = 'pg_stat_statements'

Starting PostgreSQL

systemctl start postgresql-9.6

After that in the database, run the following command:

CREATE EXTENSION pg_stat_statements

Postgres_exporter and Prometheus

Clarification. Who will install postgres_exporter from binaries

: https://mcs.mail.ru/help/monitoring-with-prometheus/postgresql-exporter
mail.ru k8s

queries.yaml
, .service extend.query-path

: https://github.com/lest/prometheus-rpm/tree/master/postgres_exporter

We install Postgres_exporter and Prometheus for Redhat systems from this repository: https://github.com/lest/prometheus-rpm

Create a file /etc/yum.repos.d/prometheus.repowith the following contents:

[prometheus]
name=prometheus
baseurl=https://packagecloud.io/prometheus-rpm/release/el/$releasever/$basearch
repo_gpgcheck=1
enabled=1
gpgkey=https://packagecloud.io/prometheus-rpm/release/gpgkey
       https://raw.githubusercontent.com/lest/prometheus-rpm/master/RPM-GPG-KEY-prometheus-rpm
gpgcheck=1
metadata_expire=300

Install prometheus2 and postgres_exporter

yum install -y prometheus2 postgres_exporter

In the prometheus.yml file for working with postgres_exporter in scrape_configs add the following section:

scrape_configs:
  - job_name: postgresql
    static_configs:
      - targets: ['ip--prometheus:9187']
        labels:
          alias: postgres

Run prometheus2 and postgres_exporter

systemctl start prometheus
systemctl start postgres_exporter

Grafana

Create a file /etc/yum.repos.d/grafana.repowith the following contents:

[grafana]
name=grafana
baseurl=https://packages.grafana.com/oss/rpm
repo_gpgcheck=1
enabled=1
gpgcheck=1
gpgkey=https://packages.grafana.com/gpg.key
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt

Install grafana

yum -y install grafana initscripts urw-fonts wget

Launch grafana

systemctl start grafana-server

Take the dashboard here

https://grafana.com/grafana/dashboards/12273

Source code here:

https://github.com/patsevanton/postgresql_overview_postgres_exporter

PS In this dashboard I lack knowledge in promql and postgresql. Therefore, I hope that you will help me with advice on how to improve the dashboard or make a pull request.

PS. As hands reach, I plan to make a dashboard for information on a specific database inside PostgreSQL.

Dashboard Postgresql Overview for postgres_exporter (Prometheus)

PostgreSQL

Postgres_exporter and Prometheus

Grafana

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