Postgresql exporter in docker. Monitroing postgres with prometheus.

Postgresql exporter in docker. Monitroing postgres with prometheus.

Create user for exporter in postgres

CREATE USER postgres_exporter PASSWORD 'kiokfhubhlundsfjbdsufdsf';
alter user postgres_exporter with password 'kiokfhubhlundsfjbdsufdsf';
ALTER USER postgres_exporter SET SEARCH_PATH TO postgres_exporter,pg_catalog;
CREATE SCHEMA postgres_exporter AUTHORIZATION postgres_exporter;
CREATE VIEW postgres_exporter.pg_stat_activity
AS
  SELECT * from pg_catalog.pg_stat_activity;
GRANT SELECT ON postgres_exporter.pg_stat_activity TO postgres_exporter;
CREATE VIEW postgres_exporter.pg_stat_replication AS SELECT * from pg_catalog.pg_stat_replication;
GRANT SELECT ON postgres_exporter.pg_stat_replication TO postgres_exporter;

Build docker postgresql exporter.

FROM alpine:3.7
LABEL maintainer="a.v.galushko86@gmail.com"
ENV POSTGRES_EXPORTER 0.4.6
RUN set -xe \
    && apk add --update --no-cache \
    ca-certificates \
    curl \
    tar \
    wget \
    supervisor
RUN mkdir -p /opt \
	&& mkdir -p /etc/supervisor/conf.d \
	&& cd /opt \
 	&& mkdir -p /etc/prometheus/exporters/postgres/ \
    && wget https://github.com/wrouesnel/postgres_exporter/releases/download/v${POSTGRES_EXPORTER}/postgres_exporter_v${POSTGRES_EXPORTER}_linux-amd64.tar.gz  \
    && tar -xvf postgres_exporter_v${POSTGRES_EXPORTER}_linux-amd64.tar.gz \
    && mv /opt/postgres_exporter_v${POSTGRES_EXPORTER}_linux-amd64/postgres_exporter /opt/postgres_exporter
COPY postgres-querys/ /etc/prometheus/exporters/postgres/
RUN echo 'Create supervisord conf'	\
       && { \
	   echo '[supervisord]'; \
	   echo 'nodaemon=true'; \
	   echo 'environment = DATA_SOURCE_NAME="postgresql://postgres_exporter:kiokfhubhlundsfjbdsufdsf@postgres:5432/postgres?sslmode=disable"'; \
	   echo '[program:postgres_exporter]'; \
       echo 'command=/opt/postgres_exporter --extend.query-path="/etc/prometheus/exporters/postgres/postgres-queries.yml" --web.listen-address=":9187"'; \
       echo 'stdout_logfile=/dev/stdout'; \
       echo 'stdout_logfile_maxbytes=0'; \
       echo 'stderr_logfile=/dev/stdout'; \
       echo 'redirect_stderr=true'; \
       echo 'stderr_logfile_maxbytes=0'; \
       echo 'exitcodes=0'; \
       echo '[include]'; \
       echo 'files = /etc/supervisor/conf.d/*.conf'; \
	      } | tee /etc/supervisor/conf.d/supervisord.conf
WORKDIR /
EXPOSE 9187
ENTRYPOINT  /usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf

And add docker exporter to you docker network with postgresql. As example with docker-swarm

  exporter-postgres:
    image: "registry-git.it-uk.ru:4567/deploy/docker-stack/exporter_postgres:latest"
    extra_hosts:
       - "postgres:postgres_ip"
    ports:
       - 9187:9187
    environment:
       - "TZ=Asia/Yekaterinburg"
    networks:
        asujs-network:
          aliases:
            - exporter-postgres
    deploy:
          replicas: 1
          resources:
            limits:
              cpus: '1'
              memory: 256MB
          restart_policy:
            condition: on-failure
            delay: 5s
            max_attempts: 3
            window: 20s
          update_config:
            parallelism: 1
            delay: 10s
            failure_action: continue
            monitor: 1s
            max_failure_ratio: 0.3
          placement:
            constraints: [node.role == manager]
networks:
  asujs-network:
    driver: overlay

And create config in prometheus server.

- targets:
  - "10.16.0.3:9187"
  labels:
    job: dbexporter
    env: prod

Import grafana dashboard.

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "description": "Performance metrics for Postgres",
  "editable": true,
  "gnetId": 3300,
  "graphTooltip": 0,
  "id": 36,
  "iteration": 1531902887193,
  "links": [],
  "panels": [
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "fill": 1,
      "gridPos": {
        "h": 7,
        "w": 8,
        "x": 0,
        "y": 0
      },
      "id": 17,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "pg_replication_lag{instance=\"$host\"}",
          "format": "time_series",
          "intervalFactor": 2,
          "metric": "pg_replication_lag",
          "refId": "A",
          "step": 2
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Replication Lag",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "s",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": false
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "editable": true,
      "error": false,
      "fill": 1,
      "grid": {},
      "gridPos": {
        "h": 7,
        "w": 8,
        "x": 8,
        "y": 0
      },
      "id": 3,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 2,
      "links": [],
      "nullPointMode": "connected",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "alias": "conflicts",
          "dsType": "prometheus",
          "expr": "sum(rate(pg_stat_database_deadlocks{datname=~\"$db\",instance=\"$host\"}[5m]))",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "deadlocks",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "A",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "conflicts"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        },
        {
          "alias": "deadlocks",
          "dsType": "prometheus",
          "expr": "sum(rate(pg_stat_database_conflicts{datname=~\"$db\",instance=\"$host\"}[5m]))",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "conflicts",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "B",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "deadlocks"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Repl. Conflicts/Deadlocks",
      "tooltip": {
        "msResolution": false,
        "shared": true,
        "sort": 0,
        "value_type": "cumulative"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": 0,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "fill": 1,
      "gridPos": {
        "h": 7,
        "w": 8,
        "x": 16,
        "y": 0
      },
      "id": 23,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "hideZero": true,
        "max": true,
        "min": false,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "pg_runtime_variable_max_connections{instance=\"$host\"}",
          "interval": "",
          "intervalFactor": 2,
          "legendFormat": "max_connections",
          "metric": "pg_runtime_variable_max_connections",
          "refId": "A",
          "step": 2
        },
        {
          "expr": "sum(pg_stat_activity_count{instance=\"$host\"})",
          "intervalFactor": 2,
          "legendFormat": "total connections",
          "metric": "pg",
          "refId": "B",
          "step": 2
        },
        {
          "expr": "sum(pg_stat_activity_count{instance=\"$host\",state=\"active\"})",
          "intervalFactor": 2,
          "legendFormat": "active sessions",
          "refId": "D",
          "step": 2
        },
        {
          "expr": "sum(pg_stat_activity_count{instance=\"$host\",state=\"idle in transaction\"})",
          "intervalFactor": 2,
          "legendFormat": "idle in transaction sessions",
          "refId": "C",
          "step": 2
        }
      ],
      "thresholds": [
        {
          "colorMode": "critical",
          "fill": true,
          "line": true,
          "op": "gt"
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "PG Connections",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "decimals": 1,
      "editable": true,
      "error": false,
      "fill": 1,
      "grid": {},
      "gridPos": {
        "h": 5,
        "w": 8,
        "x": 0,
        "y": 7
      },
      "id": 2,
      "legend": {
        "alignAsTable": true,
        "avg": true,
        "current": true,
        "hideZero": true,
        "max": true,
        "min": false,
        "rightSide": false,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "connected",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "alias": "Buffers Allocated",
          "dsType": "prometheus",
          "expr": "irate(pg_stat_bgwriter_buffers_alloc{instance='$host'}[5m])",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "buffers_alloc",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "A",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "buffers_alloc"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        },
        {
          "alias": "Buffers Allocated",
          "dsType": "prometheus",
          "expr": "irate(pg_stat_bgwriter_buffers_backend_fsync{instance='$host'}[5m])",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "buffers_backend_fsync",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "B",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "buffers_alloc"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        },
        {
          "alias": "Buffers Allocated",
          "dsType": "prometheus",
          "expr": "irate(pg_stat_bgwriter_buffers_backend{instance='$host'}[5m])",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "buffers_backend",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "C",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "buffers_alloc"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        },
        {
          "alias": "Buffers Allocated",
          "dsType": "prometheus",
          "expr": "irate(pg_stat_bgwriter_buffers_clean{instance='$host'}[5m])",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "buffers_clean",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "D",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "buffers_alloc"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        },
        {
          "alias": "Buffers Allocated",
          "dsType": "prometheus",
          "expr": "irate(pg_stat_bgwriter_buffers_checkpoint{instance='$host'}[5m])",
          "groupBy": [
            {
              "params": [
                "$interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "intervalFactor": 2,
          "legendFormat": "buffers_checkpoint",
          "measurement": "postgresql",
          "policy": "default",
          "refId": "E",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "buffers_alloc"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "mean"
              },
              {
                "params": [],
                "type": "difference"
              }
            ]
          ],
          "step": 2,
          "tags": [
            {
              "key": "host",
              "operator": "=~",
              "value": "/^$host$/"
            }
          ]
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Buffers",
      "tooltip": {
        "msResolution": false,
        "shared": true,
        "sort": 0,
        "value_type": "cumulative"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": 0,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "fill": 1,
      "gridPos": {
        "h": 5,
        "w": 8,
        "x": 8,
        "y": 7
      },
      "id": 18,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "links": [],
      "nullPointMode": "null",
      "percentage": false,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "max(pg_stat_activity_max_tx_duration{instance='$host'})",
          "intervalFactor": 2,
          "legendFormat": "max_tx_duration",
          "metric": "pg_stat_activity_max_tx_duration",
          "refId": "A",
          "step": 2
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Longest Transaction, s",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "s",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "s",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "prometheus",
      "editable": true,
      "error": false,
      "fill": 1,
      "grid": {},
      "gridPos": {
        "h": 5,
        "w": 8,
        "x": 16,
        "y": 7
      },
      "id": 14,
      "legend": {
        "avg": true,
        "current": true,
        "max": false,
        "min": true,
        "show": true,
        "total": false,
        "values": true
      },
      "lines": true,
      "linewidth": 2,
      "links": [],
      "minSpan": 4,
      "nullPointMode": "connected",
      "percentage": true,
      "pointradius": 1,
      "points": false,
      "renderer": "flot",
      "repeat": null,
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "expr": "round(100*sum(pg_stat_database_blks_hit{datname=~\"$db\",instance=\"$host\"}) / (sum(pg_stat_database_blks_hit{datname=~\"$db\",instance=\"$host\"}) + sum(pg_stat_database_blks_read{datname=~\"$db\",instance=\"$host\"})),0.1)",
          "hide": false,
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