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Add query test script and test mode

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* Add a mode to test all metric queries

* Add a script to run query tests against different versions of
  PostgeSQL

* Add Docker elements for query testing

* Switch to using a --config flag when specifying the config file

* Fix some metric queries

* Allow the agent address to be configured

* Allow the sslmode connection parameter to be configured
This commit is contained in:
James Campbell
2025-05-22 14:53:25 -04:00
parent 529bef9679
commit c0e1531083
11 changed files with 174 additions and 108 deletions
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14
sample-config/pgmon-metrics.yml
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@@ -11,7 +11,8 @@ metrics:
discover_slots:
type: set
query:
0: SELECT slot_name, plugin, slot_type, database, temporary, active FROM pg_replication_slots
0: SELECT slot_name, plugin, slot_type, database, false as temporary, active FROM pg_replication_slots
100000: SELECT slot_name, plugin, slot_type, database, temporary, active FROM pg_replication_slots
# cluster-wide metrics
version:
@@ -29,6 +30,8 @@ metrics:
query:
0: SELECT numbackends, xact_commit, xact_rollback, blks_read, blks_hit, tup_returned, tup_fetched, tup_inserted, tup_updated, tup_deleted, conflicts, temp_files, temp_bytes, deadlocks, blk_read_time, blk_write_time, extract('epoch' from stats_reset)::float FROM pg_stat_database WHERE datname = %(dbname)s
140000: SELECT numbackends, xact_commit, xact_rollback, blks_read, blks_hit, tup_returned, tup_fetched, tup_inserted, tup_updated, tup_deleted, conflicts, temp_files, temp_bytes, deadlocks, COALESCE(checksum_failures, 0) AS checksum_failures, blk_read_time, blk_write_time, session_time, active_time, idle_in_transaction_time, sessions, sessions_abandoned, sessions_fatal, sessions_killed, extract('epoch' from stats_reset)::float FROM pg_stat_database WHERE datname = %(dbname)s
test_args:
dbname: postgres
# Debugging
ntables:
@@ -40,7 +43,9 @@ metrics:
rep_stats:
type: row
query:
0: SELECT * FROM pg_stat_database WHERE client_addr || '_' || regexp_replace(application_name, '[ ,]', '_', 'g') = '{repid}'
0: SELECT * FROM pg_stat_replication WHERE client_addr || '_' || regexp_replace(application_name, '[ ,]', '_', 'g') = '{repid}'
test_args:
repid: 127.0.0.1_test_rep
# Debugging
sleep:
@@ -52,4 +57,7 @@ metrics:
slot_stats:
type: row
query:
0: SELECT active_pid, xmin, pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn) AS restart_bytes, pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn) AS confirmed_flush_bytes FROM pg_replication_slots WHERE slot_name = '{slot}'
0: SELECT active_pid, xmin, pg_xlog_location_diff(pg_current_xlog_location(), restart_lsn) AS restart_bytes, pg_xlog_location_diff(pg_current_xlog_location(), confirmed_flush_lsn) AS confirmed_flush_bytes FROM pg_replication_slots WHERE slot_name = '{slot}'
100000: SELECT active_pid, xmin, pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn) AS restart_bytes, pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn) AS confirmed_flush_bytes FROM pg_replication_slots WHERE slot_name = '{slot}'
test_args:
slot: test_slot

6
sample-config/pgmon.yml
View File

@@ -1,3 +1,6 @@
# The address the agent binds to
#address: 127.0.0.1
# The port the agent listens on for requests
#port: 5400
@@ -26,6 +29,9 @@
# Default database to connect to when none is specified for a metric
#dbname: 'postgres'
# SSL connection mode
#ssl_mode: require
# Timeout for getting a connection slot from a pool
#pool_slot_timeout: 5