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Added metrics for locks, pg_stat_replication and pg_stat_activity #2

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Merged
merged 1 commit into from
Feb 3, 2016
Merged

Added metrics for locks, pg_stat_replication and pg_stat_activity #2

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39 changes: 39 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -41,3 +41,42 @@ for l in StringIO(x):
```
Adjust the value of the resultant prometheus value type appropriately. This helps build
rich self-documenting metrics for the exporter.


### Running as non-superuser

To be able to collect metrics from pg_stat_activity and pg_stat_replication as non-superuser you have to create functions and views to do so.

```sql
CREATE USER postgres_exporter PASSWORD 'password';
ALTER USER postgres_exporter SET SEARCH_PATH TO postgres_exporter,pg_catalog;

CREATE SCHEMA postgres_exporter AUTHORIZATION postgres_exporter;

CREATE FUNCTION postgres_exporter.f_select_pg_stat_activity()
RETURNS setof pg_catalog.pg_stat_activity
LANGUAGE sql
SECURITY DEFINER
AS $$
SELECT * from pg_catalog.pg_stat_activity;
$$;

CREATE FUNCTION postgres_exporter.f_select_pg_stat_replication()
RETURNS setof pg_catalog.pg_stat_replication
LANGUAGE sql
SECURITY DEFINER
AS $$
SELECT * from pg_catalog.pg_stat_replication;
$$;

CREATE VIEW postgres_exporter.pg_stat_replication
AS
SELECT * FROM postgres_exporter.f_select_pg_stat_replication();

CREATE VIEW postgres_exporter.pg_stat_activity
AS
SELECT * FROM postgres_exporter.f_select_pg_stat_activity();

GRANT SELECT ON postgres_exporter.pg_stat_replication TO postgres_exporter;
GRANT SELECT ON postgres_exporter.pg_stat_activity TO postgres_exporter;
```
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