Monitoring Gitlab Metrics with Prometheus and Grafana

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Grafana, HowTos, Monitoring, Prometheus
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In this tutorial, we will learn about monitoring Gitlab metrics with Prometheus and Grafana. Grafana is a data visualization and monitoring tool and supports time series datastores such as Graphite, InfluxDB, Prometheus, Elasticsearch. Prometheus is a powerful time-series monitoring service, providing a flexible platform for monitoring GitLab and other software products. GitLab provides out of the box monitoring with Prometheus, providing easy access to high quality time-series monitoring of GitLab services. Grafana can be used to achieve better visualization of the metrics collected by the Prometheus.

Want more Grafana and Prometheus? Check the links below;

Prometheus: Up & Running: Infrastructure and Application Performance Monitoring

Learn Grafana 7.0: A beginner’s guide to getting well versed in analytics, interactive dashboards, and monitoring

Using Prometheus and Grafana to Monitor Gitlab Metrics

Before you can proceed, we assume you have a Gitlab server up and running. However, you can follow the link below to install and setup Gitlab server on an Ubuntu 20.04 system;

Install Gitlab with SSL/TLS Certificate on Ubuntu 20.04

By default, Omnibus Gitlab installations comes bundled with Grafana and Prometheus. To confirm this, simply check the status of Gitlab services;

gitlab-ctl status
run: alertmanager: (pid 4248) 22043s; run: log: (pid 4158) 22046s
run: gitaly: (pid 4273) 22042s; run: log: (pid 4147) 22046s
run: gitlab-exporter: (pid 4285) 22042s; run: log: (pid 4151) 22046s
run: gitlab-workhorse: (pid 4297) 22042s; run: log: (pid 4157) 22046s
run: grafana: (pid 96055) 13581s; run: log: (pid 4152) 22046s
run: logrotate: (pid 190276) 422s; run: log: (pid 4156) 22046s
run: nginx: (pid 96045) 13583s; run: log: (pid 4155) 22047s
run: node-exporter: (pid 4352) 22041s; run: log: (pid 4148) 22047s
run: postgres-exporter: (pid 4384) 22041s; run: log: (pid 4159) 22047s
run: postgresql: (pid 4425) 22038s; run: log: (pid 4149) 22047s
run: prometheus: (pid 78644) 15085s; run: log: (pid 4160) 22047s
run: puma: (pid 95895) 13594s; run: log: (pid 4150) 22047s
run: redis: (pid 4469) 22036s; run: log: (pid 4153) 22047s
run: redis-exporter: (pid 4477) 22036s; run: log: (pid 4161) 22047s
run: sidekiq: (pid 95784) 13602s; run: log: (pid 4154) 22047s

As you can see, we have Grafana and Prometheus services up and running. Similarly, you can see that we have various exporters such as node-exporter, gitlab-exporter for collecting host and Gitlab performance metrics.

You can check the status of the individual service as follows;

gitlab-ctl status prometheus
gitlab-ctl status grafana

Configuring Prometheus on Gitlab Server

By default, Prometheus is configured to be locally accessible from the Gitlab server itself. If you want to be able to access Prometheus externally, edit the configuration file and adjust the lines below accordingly.

vim /etc/gitlab/gitlab.rb
##! Advanced settings. Should be changed only if absolutely needed.
#prometheus['listen_address'] = 'localhost:9090'
prometheus['listen_address'] = '192.168.57.3:9090'
#
...

You can replace localhost with a FQDN or an IP address.

If you do not want to allow external access to Gitlab Prometheus, then you can skip the above.

Once you have made the changes, be sure to reconfigure Gitlab services for the changes to take effect;

gitlab-ctl reconfigure
...
Recipe: gitlab::gitlab-rails
  * execute[clear the gitlab-rails cache] action run
    - execute /opt/gitlab/bin/gitlab-rake cache:clear
Recipe: monitoring::prometheus
  * execute[reload prometheus] action run
    - execute /opt/gitlab/bin/gitlab-ctl hup prometheus

Running handlers:
Running handlers complete
Chef Infra Client finished, 9/811 resources updated in 01 minutes 09 seconds
gitlab Reconfigured!

Viewing Gitlab Performance Metrics on Prometheus

You can access Prometheus dashboard, either locally or externally depending on your setup. In my case, we have configured Prometheus for external access.

To allow external access, ensure that port 9090/tcp is opened on firewall if firewall is running.

Ubuntu systems and the likes;

ufw allow 9090/tcp

CentOS systems and the likes;

firewall-cmd --add-port=9090/tcp --permanent
firewall-cmd --reload

Then navigate to the Prometheus dashboard locally, (http://localhost:9090) or externally (http://fqdn-or-IP:9090).

prometheus dashboard

There are a sample Prometheus dashboard queries you have been provided with on Gitlab documentation page;

  • % Memory available: ((node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) or ((node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes) / node_memory_MemTotal_bytes)) * 100
  • % CPU utilization: 1 - avg without (mode,cpu) (rate(node_cpu_seconds_total{mode="idle"}[5m]))
  • Data transmitted: rate(node_network_transmit_bytes_total{device!="lo"}[5m])
  • Data received: rate(node_network_receive_bytes_total{device!="lo"}[5m])

You can execute and view the report on Prometheus dashboard. For example, let us execute the memory utilization query (Percentage memory available on the system) above. You should get such sample console values and graph as shown in the screenshots below;

The Console

prometheus memory utilization

The Graph

prometheus memory utilization graph

You can read more about Prometheus Queries.

Monitor Gitlab Metrics with Prometheus and Grafana

As you can see above, we got the metrics yes, but the visualization is not up to the par, -:).

We want to feel the goodness of Grafana visualization. Note that, in this setup, we are utilizing the Grafana that comes bundled with Gitlab server itself.

Enable Grafana Login using username and password

By default, the Grafana is enabled and single sign on with Gitlab is automatically enabled as well. However in this setup, we enable login using username and password.

Authentication to Grafana using username/password is disabled by default. Hence, open the configuration file and navigate to Grafana Dashboards section and enable username/password authentication by uncommenting the line, grafana['disable_login_form'] = false.

vim /etc/gitlab/gitlab.rb
...
################################################################################
## Grafana Dashboards
##! Docs: https://docs.gitlab.com/ee/administration/monitoring/prometheus/#prometheus-as-a-grafana-data-source
################################################################################

#grafana['enable'] = true
# grafana['log_directory'] = '/var/log/gitlab/grafana'
# grafana['home'] = '/var/opt/gitlab/grafana'
# grafana['admin_password'] = 'admin'
# grafana['allow_user_sign_up'] = false
# grafana['basic_auth_enabled'] = false
grafana['disable_login_form'] = false

Save and exit the file.

Reconfigure Gitlab to effect the changes;

gitlab-ctl reconfigure

Accessing Gitlab Grafana Dashboard

Once you have enabled username/password authentication, navigate to the Gitlab Grafana URL, http://FQDN-or-IP/-/grafana.

Monitoring Gitlab Metrics with Prometheus and Grafana

The username for logging in is admin. For the password, you can reset it by running the command below;

gitlab-ctl set-grafana-password

Then login to Grafana. Upon successful login, you are welcomed into Grafana dashboard.

grafana dashboard

Add Prometheus Datasource to Grafana

In order for Grafana to collect metrics from Prometheus and provide visualizations, you need to add Prometheus datasource. By default, you will find that Prometheus datasource has been added automatically. You can check by navigating to Configuration > Datasources.

Monitoring Gitlab Metrics with Prometheus and Grafana

However, if you need to add a new datasource;

  • Navigate to Configuration > Datasources > Add data source.
  • From the data source types, select Prometheus. This opens up Prometheus datasource configuration page.
  • Enter the Prometheus server URL. If you are running Grafana and Prometheus on the same server, use the address http://localhost:9090 otherwise, use the address http://<prometheus-server-IP>:9090.
  • After that, click Save & Test.

Import Gitlab Grafana Dashboards

Similarly, there are some default dashboards that the Prometheus datasource ships with. If you navigate to Configuration > Datasources > click on Gitlab Omnibus datasource > Dashboards. Click Import to import the dashboard. The button changes to Re-import after importing.

Monitoring Gitlab Metrics with Prometheus and Grafana

Viewing Gitlab Grafana Dashboards

Once you have imported the dashboards, you can now view them. Click the search button and select the dashboard you want to view its visualizations. For example, let us view the Prometheus 2.0 stats dashboard.

Monitoring Gitlab Metrics with Prometheus and Grafana

Similarly, you can monitor the Gitlab server system metrics such as cpu usage, RAM, disk I/O e.t.c. See the dashboard below;

Monitoring Gitlab Metrics with Prometheus and Grafana
Monitoring Gitlab Metrics with Prometheus and Grafana
Monitoring Gitlab Metrics with Prometheus and Grafana

For the above dashboards, below is a modified json configuration file (modified version of Gitlab system dashboard for Grafana).

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      },
      {
        "datasource": "GitLab Omnibus",
        "enable": false,
        "expr": "ALERTS{alias=\"$host\", alertstate=\"firing\"}",
        "iconColor": "rgb(252, 5, 0)",
        "name": "Alert",
        "tagKeys": "severity",
        "textFormat": "{{ alias }} : {{alertstate}}",
        "titleFormat": "{{ alertname }}"
      },
      {
        "datasource": "GitLab Omnibus",
        "enable": true,
        "expr": "ALERTS{alias=\"$host\",alertstate=\"pending\"}",
        "iconColor": "rgb(228, 242, 9)",
        "name": "Warning",
        "tagKeys": "severity",
        "textFormat": "{{ alias }} : {{ alertstate }}",
        "titleFormat": "{{ alertname }}"
      }
    ]
  },
  "description": "GitLab Prometheus for system metrics. \r\nLoad, CPU, RAM, network, process ... ",
  "editable": true,
  "gnetId": 7697,
  "graphTooltip": 1,
  "id": 17,
  "iteration": 1606596413793,
  "links": [],
  "panels": [
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "GitLab Omnibus",
      "decimals": 1,
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "s",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "height": "50px",
      "id": 19,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "s",
      "postfixFontSize": "80%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "{instance=\"192.168.57.3:9090\", job=\"prometheus\"}",
      "targets": [
        {
          "calculatedInterval": "10m",
          "datasourceErrors": {},
          "errors": {},
          "expr": "(time() - process_start_time_seconds{job=\"prometheus\"})",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_time%7Balias%3D%5C%22%24host%5C%22%7D%20-%20node_boot_time%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%2243200s%22%2C%22end_input%22%3A%222015-9-18%2013%3A25%22%2C%22step_input%22%3A%22%22%2C%22tab%22%3A0%7D%5D",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "300,3600",
      "title": "System Uptime",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": false,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "GitLab Omnibus",
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "none",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 4,
        "x": 6,
        "y": 0
      },
      "height": "55px",
      "id": 25,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "instance:node_cpus:count{instance=\"localhost:9100\", job=\"node\"}",
      "targets": [
        {
          "expr": "instance:node_cpus:count{instance=\"localhost:9100\",job=\"node\"}",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "legendFormat": "",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "",
      "title": "Virtual CPUs",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "GitLab Omnibus",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "bytes",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 4,
        "x": 10,
        "y": 0
      },
      "height": "55px",
      "id": 26,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "node_memory_MemAvailable_bytes{instance=\"localhost:9100\", job=\"node\"}",
      "targets": [
        {
          "expr": "node_memory_MemAvailable_bytes{instance=\"localhost:9100\",job=\"node\"}",
          "format": "time_series",
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "node_memory_MemAvailable",
          "refId": "A",
          "step": 30
        }
      ],
      "thresholds": "",
      "title": "RAM available",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "GitLab Omnibus",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "bytes",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 4,
        "x": 14,
        "y": 0
      },
      "height": "55px",
      "id": 34,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": false
      },
      "tableColumn": "node_memory_MemFree_bytes{instance=\"localhost:9100\", job=\"node\"}",
      "targets": [
        {
          "expr": "node_memory_MemFree_bytes{instance=\"localhost:9100\",job=\"node\"}",
          "format": "time_series",
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "node_memory_MemAvailable",
          "refId": "A",
          "step": 30
        }
      ],
      "thresholds": "",
      "title": "Free RAM",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "rgba(245, 54, 54, 0.9)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(50, 172, 45, 0.97)"
      ],
      "datasource": "GitLab Omnibus",
      "decimals": 0,
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "percent",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 6,
        "x": 18,
        "y": 0
      },
      "height": "50px",
      "id": 9,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "80%",
      "rangeMaps": [
        {
          "from": "null",
          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
        "fillColor": "rgba(31, 118, 189, 0.18)",
        "full": true,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "{instance=\"localhost:9100\", job=\"node\"}",
      "targets": [
        {
          "calculatedInterval": "10m",
          "datasourceErrors": {},
          "errors": {},
          "expr": "(node_memory_MemAvailable_bytes{instance=\"localhost:9100\",job=\"node\"} or (node_memory_MemFree_bytes{instance=\"localhost:9100\",job=\"node\"} + node_memory_Buffers_bytes{instance=\"localhost:9100\",job=\"node\"} + node_memory_Cached_bytes{instance=\"localhost:9100\",job=\"node\"})) / node_memory_MemTotal_bytes{instance=\"localhost:9100\",job=\"node\"} * 100",
          "format": "time_series",
          "interval": "5m",
          "intervalFactor": 1,
          "legendFormat": "",
          "metric": "node_mem",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22(node_memory_MemFree%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Buffers%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Cached%7Balias%3D%5C%22%24host%5C%22%7D)%20%2F%20node_memory_MemTotal%7Balias%3D%5C%22%24host%5C%22%7D%20*%20100%22%2C%22range_input%22%3A%2243201s%22%2C%22end_input%22%3A%222015-9-15%2013%3A54%22%2C%22step_input%22%3A%22%22%2C%22tab%22%3A0%7D%5D",
          "refId": "A",
          "step": 300
        }
      ],
      "thresholds": "10,50",
      "title": "% RAM Available",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [],
      "valueName": "current"
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "GitLab Omnibus",
      "decimals": 2,
      "editable": true,
      "error": false,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "fill": 6,
      "fillGradient": 0,
      "grid": {},
      "gridPos": {
        "h": 7,
        "w": 24,
        "x": 0,
        "y": 3
      },
      "height": "260px",
      "hiddenSeries": false,
      "id": 2,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": false,
        "hideEmpty": false,
        "max": true,
        "min": true,
        "rightSide": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 2,
      "links": [],
      "nullPointMode": "null",
      "options": {
        "dataLinks": []
      },
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": true,
      "steppedLine": false,
      "targets": [
        {
          "calculatedInterval": "2s",
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      "steppedLine": false,
      "targets": [
        {
          "calculatedInterval": "2s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "rate(node_vmstat_pswpin{job='node',instance='localhost:9100'}[$interval]) * 4096 or irate(node_vmstat_pswpin{job='node',instance='localhost:9100'}[5m]) * 4096",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Swap In",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_memory_MemTotal%7Balias%3D%5C%22%24host%5C%22%7D%20-%20(node_memory_MemFree%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Buffers%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Cached%7Balias%3D%5C%22%24host%5C%22%7D)%22%2C%22range_input%22%3A%22900s%22%2C%22end_input%22%3A%222015-10-22%2015%3A25%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Atrue%2C%22tab%22%3A0%7D%5D",
          "refId": "A",
          "step": 5,
          "target": ""
        },
        {
          "calculatedInterval": "2s",
          "datasourceErrors": {},
          "errors": {},
          "expr": "rate(node_vmstat_pswpout{job='node',instance='localhost:9100'}[$interval]) * 4096 or irate(node_vmstat_pswpout{job='node',instance='localhost:9100'}[5m]) * 4096",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "Swap Out",
          "metric": "",
          "prometheusLink": "/api/datasources/proxy/1/graph#%5B%7B%22expr%22%3A%22node_memory_MemFree%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Buffers%7Balias%3D%5C%22%24host%5C%22%7D%20%2B%20node_memory_Cached%7Balias%3D%5C%22%24host%5C%22%7D%22%2C%22range_input%22%3A%22900s%22%2C%22end_input%22%3A%222015-10-22%2015%3A25%22%2C%22step_input%22%3A%22%22%2C%22stacked%22%3Atrue%2C%22tab%22%3A0%7D%5D",
          "refId": "B",
          "step": 5,
          "target": ""
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Swap Activity",
      "tooltip": {
        "msResolution": false,
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "Bps",
          "label": "",
          "logBase": 1,
          "max": null,
          "min": 0,
          "show": true
        },
        {
          "format": "bytes",
          "logBase": 1,
          "max": null,
          "min": 0,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "refresh": "30s",
  "schemaVersion": 25,
  "style": "dark",
  "tags": [
    "system",
    "prometheus",
    "online",
    "GetLab"
  ],
  "templating": {
    "list": [
      {
        "allFormat": "glob",
        "auto": true,
        "auto_count": 200,
        "auto_min": "1s",
        "current": {
          "selected": false,
          "text": "5s",
          "value": "5s"
        },
        "datasource": "GitLab Omnibus",
        "hide": 0,
        "includeAll": false,
        "label": "Interval",
        "multi": false,
        "multiFormat": "glob",
        "name": "interval",
        "options": [
          {
            "selected": false,
            "text": "auto",
            "value": "$__auto_interval_interval"
          },
          {
            "selected": false,
            "text": "1s",
            "value": "1s"
          },
          {
            "selected": true,
            "text": "5s",
            "value": "5s"
          },
          {
            "selected": false,
            "text": "1m",
            "value": "1m"
          },
          {
            "selected": false,
            "text": "5m",
            "value": "5m"
          },
          {
            "selected": false,
            "text": "1h",
            "value": "1h"
          },
          {
            "selected": false,
            "text": "6h",
            "value": "6h"
          },
          {
            "selected": false,
            "text": "1d",
            "value": "1d"
          }
        ],
        "query": "1s,5s,1m,5m,1h,6h,1d",
        "refresh": 2,
        "skipUrlSync": false,
        "type": "interval"
      }
    ]
  },
  "time": {
    "from": "now-1h",
    "to": "now"
  },
  "timepicker": {
    "collapse": false,
    "enable": true,
    "notice": false,
    "now": true,
    "refresh_intervals": [
      "5s",
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ],
    "status": "Stable",
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
      "7d",
      "30d"
    ],
    "type": "timepicker"
  },
  "timezone": "",
  "title": "Gitlab System",
  "uid": "4W5aRFAGz",
  "version": 2
}

And there you go. You can further enable and collect various Gitlab metric data and visualize them on Grafana.

Reference

Monitoring Gitlab with Prometheus

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koromicha
I am the Co-founder of Kifarunix.com, Linux and the whole FOSS enthusiast, Linux System Admin and a Blue Teamer who loves to share technological tips and hacks with others as a way of sharing knowledge as: "In vain have you acquired knowledge if you have not imparted it to others".

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