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authorDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:19:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:20:17 +0000
commita64a253794ac64cb40befee54db53bde17dd0d49 (patch)
treec1024acc5f6e508814b944d99f112259bb28b1be /collectors/python.d.plugin/postgres
parentNew upstream version 1.10.0+dfsg (diff)
downloadnetdata-a64a253794ac64cb40befee54db53bde17dd0d49.tar.xz
netdata-a64a253794ac64cb40befee54db53bde17dd0d49.zip
New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'collectors/python.d.plugin/postgres')
-rw-r--r--collectors/python.d.plugin/postgres/Makefile.inc13
-rw-r--r--collectors/python.d.plugin/postgres/README.md68
-rw-r--r--collectors/python.d.plugin/postgres/postgres.chart.py823
-rw-r--r--collectors/python.d.plugin/postgres/postgres.conf124
4 files changed, 1028 insertions, 0 deletions
diff --git a/collectors/python.d.plugin/postgres/Makefile.inc b/collectors/python.d.plugin/postgres/Makefile.inc
new file mode 100644
index 000000000..91a185cb9
--- /dev/null
+++ b/collectors/python.d.plugin/postgres/Makefile.inc
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# THIS IS NOT A COMPLETE Makefile
+# IT IS INCLUDED BY ITS PARENT'S Makefile.am
+# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
+
+# install these files
+dist_python_DATA += postgres/postgres.chart.py
+dist_pythonconfig_DATA += postgres/postgres.conf
+
+# do not install these files, but include them in the distribution
+dist_noinst_DATA += postgres/README.md postgres/Makefile.inc
+
diff --git a/collectors/python.d.plugin/postgres/README.md b/collectors/python.d.plugin/postgres/README.md
new file mode 100644
index 000000000..e7b108d36
--- /dev/null
+++ b/collectors/python.d.plugin/postgres/README.md
@@ -0,0 +1,68 @@
+# postgres
+
+Module monitors one or more postgres servers.
+
+**Requirements:**
+
+ * `python-psycopg2` package. You have to install it manually.
+
+Following charts are drawn:
+
+1. **Database size** MB
+ * size
+
+2. **Current Backend Processes** processes
+ * active
+
+3. **Write-Ahead Logging Statistics** files/s
+ * total
+ * ready
+ * done
+
+4. **Checkpoints** writes/s
+ * scheduled
+ * requested
+
+5. **Current connections to db** count
+ * connections
+
+6. **Tuples returned from db** tuples/s
+ * sequential
+ * bitmap
+
+7. **Tuple reads from db** reads/s
+ * disk
+ * cache
+
+8. **Transactions on db** transactions/s
+ * committed
+ * rolled back
+
+9. **Tuples written to db** writes/s
+ * inserted
+ * updated
+ * deleted
+ * conflicts
+
+10. **Locks on db** count per type
+ * locks
+
+### configuration
+
+```yaml
+socket:
+ name : 'socket'
+ user : 'postgres'
+ database : 'postgres'
+
+tcp:
+ name : 'tcp'
+ user : 'postgres'
+ database : 'postgres'
+ host : 'localhost'
+ port : 5432
+```
+
+When no configuration file is found, module tries to connect to TCP/IP socket: `localhost:5432`.
+
+---
diff --git a/collectors/python.d.plugin/postgres/postgres.chart.py b/collectors/python.d.plugin/postgres/postgres.chart.py
new file mode 100644
index 000000000..7f43877c3
--- /dev/null
+++ b/collectors/python.d.plugin/postgres/postgres.chart.py
@@ -0,0 +1,823 @@
+# -*- coding: utf-8 -*-
+# Description: example netdata python.d module
+# Authors: facetoe, dangtranhoang
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from copy import deepcopy
+
+try:
+ import psycopg2
+ from psycopg2 import extensions
+ from psycopg2.extras import DictCursor
+ from psycopg2 import OperationalError
+ PSYCOPG2 = True
+except ImportError:
+ PSYCOPG2 = False
+
+from bases.FrameworkServices.SimpleService import SimpleService
+
+# default module values
+update_every = 1
+priority = 60000
+retries = 60
+
+METRICS = {
+ 'DATABASE': [
+ 'connections',
+ 'xact_commit',
+ 'xact_rollback',
+ 'blks_read',
+ 'blks_hit',
+ 'tup_returned',
+ 'tup_fetched',
+ 'tup_inserted',
+ 'tup_updated',
+ 'tup_deleted',
+ 'conflicts',
+ 'temp_files',
+ 'temp_bytes',
+ 'size'
+ ],
+ 'BACKENDS': [
+ 'backends_active',
+ 'backends_idle'
+ ],
+ 'INDEX_STATS': [
+ 'index_count',
+ 'index_size'
+ ],
+ 'TABLE_STATS': [
+ 'table_size',
+ 'table_count'
+ ],
+ 'WAL': [
+ 'written_wal',
+ 'recycled_wal',
+ 'total_wal'
+ ],
+ 'WAL_WRITES': [
+ 'wal_writes'
+ ],
+ 'ARCHIVE': [
+ 'ready_count',
+ 'done_count',
+ 'file_count'
+ ],
+ 'BGWRITER': [
+ 'checkpoint_scheduled',
+ 'checkpoint_requested',
+ 'buffers_checkpoint',
+ 'buffers_clean',
+ 'maxwritten_clean',
+ 'buffers_backend',
+ 'buffers_alloc',
+ 'buffers_backend_fsync'
+ ],
+ 'LOCKS': [
+ 'ExclusiveLock',
+ 'RowShareLock',
+ 'SIReadLock',
+ 'ShareUpdateExclusiveLock',
+ 'AccessExclusiveLock',
+ 'AccessShareLock',
+ 'ShareRowExclusiveLock',
+ 'ShareLock',
+ 'RowExclusiveLock'
+ ],
+ 'AUTOVACUUM': [
+ 'analyze',
+ 'vacuum_analyze',
+ 'vacuum',
+ 'vacuum_freeze',
+ 'brin_summarize'
+ ],
+ 'STANDBY_DELTA': [
+ 'sent_delta',
+ 'write_delta',
+ 'flush_delta',
+ 'replay_delta'
+ ],
+ 'REPSLOT_FILES': [
+ 'replslot_wal_keep',
+ 'replslot_files'
+ ]
+}
+
+QUERIES = {
+ 'WAL': """
+SELECT
+ count(*) as total_wal,
+ count(*) FILTER (WHERE type = 'recycled') AS recycled_wal,
+ count(*) FILTER (WHERE type = 'written') AS written_wal
+FROM
+ (SELECT
+ wal.name,
+ pg_{0}file_name(
+ CASE pg_is_in_recovery()
+ WHEN true THEN NULL
+ ELSE pg_current_{0}_{1}()
+ END ),
+ CASE
+ WHEN wal.name > pg_{0}file_name(
+ CASE pg_is_in_recovery()
+ WHEN true THEN NULL
+ ELSE pg_current_{0}_{1}()
+ END ) THEN 'recycled'
+ ELSE 'written'
+ END AS type
+ FROM pg_catalog.pg_ls_dir('pg_{0}') AS wal(name)
+ WHERE name ~ '^[0-9A-F]{{24}}$'
+ ORDER BY
+ (pg_stat_file('pg_{0}/'||name)).modification,
+ wal.name DESC) sub;
+""",
+ 'ARCHIVE': """
+SELECT
+ CAST(COUNT(*) AS INT) AS file_count,
+ CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.ready$$r$ as INT)),0) AS INT) AS ready_count,
+ CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.done$$r$ AS INT)),0) AS INT) AS done_count
+FROM
+ pg_catalog.pg_ls_dir('pg_{0}/archive_status') AS archive_files (archive_file);
+""",
+ 'BACKENDS': """
+SELECT
+ count(*) - (SELECT count(*)
+ FROM pg_stat_activity
+ WHERE state = 'idle')
+ AS backends_active,
+ (SELECT count(*)
+ FROM pg_stat_activity
+ WHERE state = 'idle')
+ AS backends_idle
+FROM pg_stat_activity;
+""",
+ 'TABLE_STATS': """
+SELECT
+ ((sum(relpages) * 8) * 1024) AS table_size,
+ count(1) AS table_count
+FROM pg_class
+WHERE relkind IN ('r', 't');
+""",
+ 'INDEX_STATS': """
+SELECT
+ ((sum(relpages) * 8) * 1024) AS index_size,
+ count(1) AS index_count
+FROM pg_class
+WHERE relkind = 'i';
+""",
+ 'DATABASE': """
+SELECT
+ datname AS database_name,
+ numbackends AS connections,
+ xact_commit AS xact_commit,
+ xact_rollback AS xact_rollback,
+ blks_read AS blks_read,
+ blks_hit AS blks_hit,
+ tup_returned AS tup_returned,
+ tup_fetched AS tup_fetched,
+ tup_inserted AS tup_inserted,
+ tup_updated AS tup_updated,
+ tup_deleted AS tup_deleted,
+ conflicts AS conflicts,
+ pg_database_size(datname) AS size,
+ temp_files AS temp_files,
+ temp_bytes AS temp_bytes
+FROM pg_stat_database
+WHERE datname IN %(databases)s ;
+""",
+ 'BGWRITER': """
+SELECT
+ checkpoints_timed AS checkpoint_scheduled,
+ checkpoints_req AS checkpoint_requested,
+ buffers_checkpoint * current_setting('block_size')::numeric buffers_checkpoint,
+ buffers_clean * current_setting('block_size')::numeric buffers_clean,
+ maxwritten_clean,
+ buffers_backend * current_setting('block_size')::numeric buffers_backend,
+ buffers_alloc * current_setting('block_size')::numeric buffers_alloc,
+ buffers_backend_fsync
+FROM pg_stat_bgwriter;
+""",
+ 'LOCKS': """
+SELECT
+ pg_database.datname as database_name,
+ mode,
+ count(mode) AS locks_count
+FROM pg_locks
+INNER JOIN pg_database
+ ON pg_database.oid = pg_locks.database
+GROUP BY datname, mode
+ORDER BY datname, mode;
+""",
+ 'FIND_DATABASES': """
+SELECT
+ datname
+FROM pg_stat_database
+WHERE
+ has_database_privilege(
+ (SELECT current_user), datname, 'connect')
+ AND NOT datname ~* '^template\d ';
+""",
+ 'FIND_STANDBY': """
+SELECT
+ application_name
+FROM pg_stat_replication
+WHERE application_name IS NOT NULL
+GROUP BY application_name;
+""",
+ 'FIND_REPLICATION_SLOT': """
+SELECT slot_name
+FROM pg_replication_slots;
+""",
+ 'STANDBY_DELTA': """
+SELECT
+ application_name,
+ pg_{0}_{1}_diff(
+ CASE pg_is_in_recovery()
+ WHEN true THEN pg_last_{0}_receive_{1}()
+ ELSE pg_current_{0}_{1}()
+ END,
+ sent_{1}) AS sent_delta,
+ pg_{0}_{1}_diff(
+ CASE pg_is_in_recovery()
+ WHEN true THEN pg_last_{0}_receive_{1}()
+ ELSE pg_current_{0}_{1}()
+ END,
+ write_{1}) AS write_delta,
+ pg_{0}_{1}_diff(
+ CASE pg_is_in_recovery()
+ WHEN true THEN pg_last_{0}_receive_{1}()
+ ELSE pg_current_{0}_{1}()
+ END,
+ flush_{1}) AS flush_delta,
+ pg_{0}_{1}_diff(
+ CASE pg_is_in_recovery()
+ WHEN true THEN pg_last_{0}_receive_{1}()
+ ELSE pg_current_{0}_{1}()
+ END,
+ replay_{1}) AS replay_delta
+FROM pg_stat_replication
+WHERE application_name IS NOT NULL;
+""",
+ 'REPSLOT_FILES': """
+WITH wal_size AS (
+ SELECT
+ current_setting('wal_block_size')::INT * setting::INT AS val
+ FROM pg_settings
+ WHERE name = 'wal_segment_size'
+ )
+SELECT
+ slot_name,
+ slot_type,
+ replslot_wal_keep,
+ count(slot_file) AS replslot_files
+FROM
+ (SELECT
+ slot.slot_name,
+ CASE
+ WHEN slot_file <> 'state' THEN 1
+ END AS slot_file ,
+ slot_type,
+ COALESCE (
+ floor(
+ (pg_wal_lsn_diff(pg_current_wal_lsn (),slot.restart_lsn)
+ - (pg_walfile_name_offset (restart_lsn)).file_offset) / (s.val)
+ ),0) AS replslot_wal_keep
+ FROM pg_replication_slots slot
+ LEFT JOIN (
+ SELECT
+ slot2.slot_name,
+ pg_ls_dir('pg_replslot/' || slot2.slot_name) AS slot_file
+ FROM pg_replication_slots slot2
+ ) files (slot_name, slot_file)
+ ON slot.slot_name = files.slot_name
+ CROSS JOIN wal_size s
+ ) AS d
+GROUP BY
+ slot_name,
+ slot_type,
+ replslot_wal_keep;
+""",
+ 'IF_SUPERUSER': """
+SELECT current_setting('is_superuser') = 'on' AS is_superuser;
+""",
+ 'DETECT_SERVER_VERSION': """
+SHOW server_version_num;
+""",
+ 'AUTOVACUUM': """
+SELECT
+ count(*) FILTER (WHERE query LIKE 'autovacuum: ANALYZE%%') AS analyze,
+ count(*) FILTER (WHERE query LIKE 'autovacuum: VACUUM ANALYZE%%') AS vacuum_analyze,
+ count(*) FILTER (WHERE query LIKE 'autovacuum: VACUUM%%'
+ AND query NOT LIKE 'autovacuum: VACUUM ANALYZE%%'
+ AND query NOT LIKE '%%to prevent wraparound%%') AS vacuum,
+ count(*) FILTER (WHERE query LIKE '%%to prevent wraparound%%') AS vacuum_freeze,
+ count(*) FILTER (WHERE query LIKE 'autovacuum: BRIN summarize%%') AS brin_summarize
+FROM pg_stat_activity
+WHERE query NOT LIKE '%%pg_stat_activity%%';
+""",
+ 'DIFF_LSN': """
+SELECT
+ pg_{0}_{1}_diff(
+ CASE pg_is_in_recovery()
+ WHEN true THEN pg_last_{0}_receive_{1}()
+ ELSE pg_current_{0}_{1}()
+ END,
+ '0/0') as wal_writes ;
+"""
+}
+
+
+QUERY_STATS = {
+ QUERIES['DATABASE']: METRICS['DATABASE'],
+ QUERIES['BACKENDS']: METRICS['BACKENDS'],
+ QUERIES['LOCKS']: METRICS['LOCKS']
+}
+
+ORDER = [
+ 'db_stat_temp_files',
+ 'db_stat_temp_bytes',
+ 'db_stat_blks',
+ 'db_stat_tuple_returned',
+ 'db_stat_tuple_write',
+ 'db_stat_transactions',
+ 'db_stat_connections',
+ 'database_size',
+ 'backend_process',
+ 'index_count',
+ 'index_size',
+ 'table_count',
+ 'table_size',
+ 'wal',
+ 'wal_writes',
+ 'archive_wal',
+ 'checkpointer',
+ 'stat_bgwriter_alloc',
+ 'stat_bgwriter_checkpoint',
+ 'stat_bgwriter_backend',
+ 'stat_bgwriter_backend_fsync',
+ 'stat_bgwriter_bgwriter',
+ 'stat_bgwriter_maxwritten',
+ 'replication_slot',
+ 'standby_delta',
+ 'autovacuum'
+]
+
+CHARTS = {
+ 'db_stat_transactions': {
+ 'options': [None, 'Transactions on db', 'transactions/s', 'db statistics', 'postgres.db_stat_transactions',
+ 'line'],
+ 'lines': [
+ ['xact_commit', 'committed', 'incremental'],
+ ['xact_rollback', 'rolled back', 'incremental']
+ ]
+ },
+ 'db_stat_connections': {
+ 'options': [None, 'Current connections to db', 'count', 'db statistics', 'postgres.db_stat_connections',
+ 'line'],
+ 'lines': [
+ ['connections', 'connections', 'absolute']
+ ]
+ },
+ 'db_stat_blks': {
+ 'options': [None, 'Disk blocks reads from db', 'reads/s', 'db statistics', 'postgres.db_stat_blks', 'line'],
+ 'lines': [
+ ['blks_read', 'disk', 'incremental'],
+ ['blks_hit', 'cache', 'incremental']
+ ]
+ },
+ 'db_stat_tuple_returned': {
+ 'options': [None, 'Tuples returned from db', 'tuples/s', 'db statistics', 'postgres.db_stat_tuple_returned',
+ 'line'],
+ 'lines': [
+ ['tup_returned', 'sequential', 'incremental'],
+ ['tup_fetched', 'bitmap', 'incremental']
+ ]
+ },
+ 'db_stat_tuple_write': {
+ 'options': [None, 'Tuples written to db', 'writes/s', 'db statistics', 'postgres.db_stat_tuple_write', 'line'],
+ 'lines': [
+ ['tup_inserted', 'inserted', 'incremental'],
+ ['tup_updated', 'updated', 'incremental'],
+ ['tup_deleted', 'deleted', 'incremental'],
+ ['conflicts', 'conflicts', 'incremental']
+ ]
+ },
+ 'db_stat_temp_bytes': {
+ 'options': [None, 'Temp files written to disk', 'KB/s', 'db statistics', 'postgres.db_stat_temp_bytes',
+ 'line'],
+ 'lines': [
+ ['temp_bytes', 'size', 'incremental', 1, 1024]
+ ]
+ },
+ 'db_stat_temp_files': {
+ 'options': [None, 'Temp files written to disk', 'files', 'db statistics', 'postgres.db_stat_temp_files',
+ 'line'],
+ 'lines': [
+ ['temp_files', 'files', 'incremental']
+ ]
+ },
+ 'database_size': {
+ 'options': [None, 'Database size', 'MB', 'database size', 'postgres.db_size', 'stacked'],
+ 'lines': [
+ ]
+ },
+ 'backend_process': {
+ 'options': [None, 'Current Backend Processes', 'processes', 'backend processes', 'postgres.backend_process',
+ 'line'],
+ 'lines': [
+ ['backends_active', 'active', 'absolute'],
+ ['backends_idle', 'idle', 'absolute']
+ ]
+ },
+ 'index_count': {
+ 'options': [None, 'Total indexes', 'index', 'indexes', 'postgres.index_count', 'line'],
+ 'lines': [
+ ['index_count', 'total', 'absolute']
+ ]
+ },
+ 'index_size': {
+ 'options': [None, 'Indexes size', 'MB', 'indexes', 'postgres.index_size', 'line'],
+ 'lines': [
+ ['index_size', 'size', 'absolute', 1, 1024 * 1024]
+ ]
+ },
+ 'table_count': {
+ 'options': [None, 'Total Tables', 'tables', 'tables', 'postgres.table_count', 'line'],
+ 'lines': [
+ ['table_count', 'total', 'absolute']
+ ]
+ },
+ 'table_size': {
+ 'options': [None, 'Tables size', 'MB', 'tables', 'postgres.table_size', 'line'],
+ 'lines': [
+ ['table_size', 'size', 'absolute', 1, 1024 * 1024]
+ ]
+ },
+ 'wal': {
+ 'options': [None, 'Write-Ahead Logs', 'files', 'wal', 'postgres.wal', 'line'],
+ 'lines': [
+ ['written_wal', 'written', 'absolute'],
+ ['recycled_wal', 'recycled', 'absolute'],
+ ['total_wal', 'total', 'absolute']
+ ]
+ },
+ 'wal_writes': {
+ 'options': [None, 'Write-Ahead Logs', 'kilobytes/s', 'wal_writes', 'postgres.wal_writes', 'line'],
+ 'lines': [
+ ['wal_writes', 'writes', 'incremental', 1, 1024]
+ ]
+ },
+ 'archive_wal': {
+ 'options': [None, 'Archive Write-Ahead Logs', 'files/s', 'archive wal', 'postgres.archive_wal', 'line'],
+ 'lines': [
+ ['file_count', 'total', 'incremental'],
+ ['ready_count', 'ready', 'incremental'],
+ ['done_count', 'done', 'incremental']
+ ]
+ },
+ 'checkpointer': {
+ 'options': [None, 'Checkpoints', 'writes', 'checkpointer', 'postgres.checkpointer', 'line'],
+ 'lines': [
+ ['checkpoint_scheduled', 'scheduled', 'incremental'],
+ ['checkpoint_requested', 'requested', 'incremental']
+ ]
+ },
+ 'stat_bgwriter_alloc': {
+ 'options': [None, 'Buffers allocated', 'kilobytes/s', 'bgwriter', 'postgres.stat_bgwriter_alloc', 'line'],
+ 'lines': [
+ ['buffers_alloc', 'alloc', 'incremental', 1, 1024]
+ ]
+ },
+ 'stat_bgwriter_checkpoint': {
+ 'options': [None, 'Buffers written during checkpoints', 'kilobytes/s', 'bgwriter',
+ 'postgres.stat_bgwriter_checkpoint', 'line'],
+ 'lines': [
+ ['buffers_checkpoint', 'checkpoint', 'incremental', 1, 1024]
+ ]
+ },
+ 'stat_bgwriter_backend': {
+ 'options': [None, 'Buffers written directly by a backend', 'kilobytes/s', 'bgwriter',
+ 'postgres.stat_bgwriter_backend', 'line'],
+ 'lines': [
+ ['buffers_backend', 'backend', 'incremental', 1, 1024]
+ ]
+ },
+ 'stat_bgwriter_backend_fsync': {
+ 'options': [None, 'Fsync by backend', 'times', 'bgwriter', 'postgres.stat_bgwriter_backend_fsync', 'line'],
+ 'lines': [
+ ['buffers_backend_fsync', 'backend fsync', 'incremental']
+ ]
+ },
+ 'stat_bgwriter_bgwriter': {
+ 'options': [None, 'Buffers written by the background writer', 'kilobytes/s', 'bgwriter',
+ 'postgres.bgwriter_bgwriter', 'line'],
+ 'lines': [
+ ['buffers_clean', 'clean', 'incremental', 1, 1024]
+ ]
+ },
+ 'stat_bgwriter_maxwritten': {
+ 'options': [None, 'Too many buffers written', 'times', 'bgwriter', 'postgres.stat_bgwriter_maxwritten',
+ 'line'],
+ 'lines': [
+ ['maxwritten_clean', 'maxwritten', 'incremental']
+ ]
+ },
+ 'autovacuum': {
+ 'options': [None, 'Autovacuum workers', 'workers', 'autovacuum', 'postgres.autovacuum', 'line'],
+ 'lines': [
+ ['analyze', 'analyze', 'absolute'],
+ ['vacuum', 'vacuum', 'absolute'],
+ ['vacuum_analyze', 'vacuum analyze', 'absolute'],
+ ['vacuum_freeze', 'vacuum freeze', 'absolute'],
+ ['brin_summarize', 'brin summarize', 'absolute']
+ ]
+ },
+ 'standby_delta': {
+ 'options': [None, 'Standby delta', 'kilobytes', 'replication delta', 'postgres.standby_delta', 'line'],
+ 'lines': [
+ ['sent_delta', 'sent delta', 'absolute', 1, 1024],
+ ['write_delta', 'write delta', 'absolute', 1, 1024],
+ ['flush_delta', 'flush delta', 'absolute', 1, 1024],
+ ['replay_delta', 'replay delta', 'absolute', 1, 1024]
+ ]
+ },
+ 'replication_slot': {
+ 'options': [None, 'Replication slot files', 'files', 'replication slot', 'postgres.replication_slot', 'line'],
+ 'lines': [
+ ['replslot_wal_keep', 'wal keeped', 'absolute'],
+ ['replslot_files', 'pg_replslot files', 'absolute']
+ ]
+ }
+}
+
+
+class Service(SimpleService):
+ def __init__(self, configuration=None, name=None):
+ SimpleService.__init__(self, configuration=configuration, name=name)
+ self.order = ORDER[:]
+ self.definitions = deepcopy(CHARTS)
+ self.table_stats = configuration.pop('table_stats', False)
+ self.index_stats = configuration.pop('index_stats', False)
+ self.database_poll = configuration.pop('database_poll', None)
+ self.configuration = configuration
+ self.connection = False
+ self.server_version = None
+ self.data = dict()
+ self.locks_zeroed = dict()
+ self.databases = list()
+ self.secondaries = list()
+ self.replication_slots = list()
+ self.queries = QUERY_STATS.copy()
+
+ def _connect(self):
+ params = dict(user='postgres',
+ database=None,
+ password=None,
+ host=None,
+ port=5432)
+ params.update(self.configuration)
+
+ if not self.connection:
+ try:
+ self.connection = psycopg2.connect(**params)
+ self.connection.set_isolation_level(extensions.ISOLATION_LEVEL_AUTOCOMMIT)
+ self.connection.set_session(readonly=True)
+ except OperationalError as error:
+ return False, str(error)
+ return True, True
+
+ def check(self):
+ if not PSYCOPG2:
+ self.error('\'python-psycopg2\' module is needed to use postgres.chart.py')
+ return False
+ result, error = self._connect()
+ if not result:
+ conf = dict((k, (lambda k, v: v if k != 'password' else '*****')(k, v))
+ for k, v in self.configuration.items())
+ self.error('Failed to connect to %s. Error: %s' % (str(conf), error))
+ return False
+ try:
+ cursor = self.connection.cursor()
+ self.databases = discover_databases_(cursor, QUERIES['FIND_DATABASES'])
+ is_superuser = check_if_superuser_(cursor, QUERIES['IF_SUPERUSER'])
+ self.secondaries = discover_secondaries_(cursor, QUERIES['FIND_STANDBY'])
+ self.server_version = detect_server_version(cursor, QUERIES['DETECT_SERVER_VERSION'])
+ if self.server_version >= 94000:
+ self.replication_slots = discover_replication_slots_(cursor, QUERIES['FIND_REPLICATION_SLOT'])
+ cursor.close()
+
+ if self.database_poll and isinstance(self.database_poll, str):
+ self.databases = [dbase for dbase in self.databases if dbase in self.database_poll.split()] \
+ or self.databases
+
+ self.locks_zeroed = populate_lock_types(self.databases)
+ self.add_additional_queries_(is_superuser)
+ self.create_dynamic_charts_()
+ return True
+ except Exception as error:
+ self.error(str(error))
+ return False
+
+ def add_additional_queries_(self, is_superuser):
+
+ if self.server_version >= 100000:
+ wal = 'wal'
+ lsn = 'lsn'
+ else:
+ wal = 'xlog'
+ lsn = 'location'
+ self.queries[QUERIES['BGWRITER']] = METRICS['BGWRITER']
+ self.queries[QUERIES['DIFF_LSN'].format(wal, lsn)] = METRICS['WAL_WRITES']
+ self.queries[QUERIES['STANDBY_DELTA'].format(wal, lsn)] = METRICS['STANDBY_DELTA']
+
+ if self.index_stats:
+ self.queries[QUERIES['INDEX_STATS']] = METRICS['INDEX_STATS']
+ if self.table_stats:
+ self.queries[QUERIES['TABLE_STATS']] = METRICS['TABLE_STATS']
+ if is_superuser:
+ self.queries[QUERIES['ARCHIVE'].format(wal)] = METRICS['ARCHIVE']
+ if self.server_version >= 90400:
+ self.queries[QUERIES['WAL'].format(wal, lsn)] = METRICS['WAL']
+ if self.server_version >= 100000:
+ self.queries[QUERIES['REPSLOT_FILES']] = METRICS['REPSLOT_FILES']
+ if self.server_version >= 90400:
+ self.queries[QUERIES['AUTOVACUUM']] = METRICS['AUTOVACUUM']
+
+ def create_dynamic_charts_(self):
+
+ for database_name in self.databases[::-1]:
+ self.definitions['database_size']['lines'].append(
+ [database_name + '_size', database_name, 'absolute', 1, 1024 * 1024])
+ for chart_name in [name for name in self.order if name.startswith('db_stat')]:
+ add_database_stat_chart_(order=self.order, definitions=self.definitions,
+ name=chart_name, database_name=database_name)
+
+ add_database_lock_chart_(order=self.order, definitions=self.definitions, database_name=database_name)
+
+ for application_name in self.secondaries[::-1]:
+ add_replication_delta_chart_(
+ order=self.order,
+ definitions=self.definitions,
+ name='standby_delta',
+ application_name=application_name)
+
+ for slot_name in self.replication_slots[::-1]:
+ add_replication_slot_chart_(
+ order=self.order,
+ definitions=self.definitions,
+ name='replication_slot',
+ slot_name=slot_name)
+
+ def _get_data(self):
+ result, _ = self._connect()
+ if result:
+ cursor = self.connection.cursor(cursor_factory=DictCursor)
+ try:
+ self.data.update(self.locks_zeroed)
+ for query, metrics in self.queries.items():
+ self.query_stats_(cursor, query, metrics)
+
+ except OperationalError:
+ self.connection = False
+ cursor.close()
+ return None
+ else:
+ cursor.close()
+ return self.data
+ else:
+ return None
+
+ def query_stats_(self, cursor, query, metrics):
+ cursor.execute(query, dict(databases=tuple(self.databases)))
+ for row in cursor:
+ for metric in metrics:
+ if 'database_name' in row:
+ dimension_id = '_'.join([row['database_name'], metric])
+ elif 'application_name' in row:
+ dimension_id = '_'.join([row['application_name'], metric])
+ elif 'slot_name' in row:
+ dimension_id = '_'.join([row['slot_name'], metric])
+ else:
+ dimension_id = metric
+ if metric in row:
+ if row[metric] is not None:
+ self.data[dimension_id] = int(row[metric])
+ elif 'locks_count' in row:
+ self.data[dimension_id] = row['locks_count'] if metric == row['mode'] else 0
+
+
+def discover_databases_(cursor, query):
+ cursor.execute(query)
+ result = list()
+ for db in [database[0] for database in cursor]:
+ if db not in result:
+ result.append(db)
+ return result
+
+
+def discover_secondaries_(cursor, query):
+ cursor.execute(query)
+ result = list()
+ for sc in [standby[0] for standby in cursor]:
+ if sc not in result:
+ result.append(sc)
+ return result
+
+
+def discover_replication_slots_(cursor, query):
+ cursor.execute(query)
+ result = list()
+ for slot in [replication_slot[0] for replication_slot in cursor]:
+ if slot not in result:
+ result.append(slot)
+ return result
+
+
+def check_if_superuser_(cursor, query):
+ cursor.execute(query)
+ return cursor.fetchone()[0]
+
+
+def detect_server_version(cursor, query):
+ cursor.execute(query)
+ return int(cursor.fetchone()[0])
+
+
+def populate_lock_types(databases):
+ result = dict()
+ for database in databases:
+ for lock_type in METRICS['LOCKS']:
+ key = '_'.join([database, lock_type])
+ result[key] = 0
+
+ return result
+
+
+def add_database_lock_chart_(order, definitions, database_name):
+ def create_lines(database):
+ result = list()
+ for lock_type in METRICS['LOCKS']:
+ dimension_id = '_'.join([database, lock_type])
+ result.append([dimension_id, lock_type, 'absolute'])
+ return result
+
+ chart_name = database_name + '_locks'
+ order.insert(-1, chart_name)
+ definitions[chart_name] = {
+ 'options':
+ [None, 'Locks on db: ' + database_name, 'locks', 'db ' + database_name, 'postgres.db_locks', 'line'],
+ 'lines': create_lines(database_name)
+ }
+
+
+def add_database_stat_chart_(order, definitions, name, database_name):
+ def create_lines(database, lines):
+ result = list()
+ for line in lines:
+ new_line = ['_'.join([database, line[0]])] + line[1:]
+ result.append(new_line)
+ return result
+
+ chart_template = CHARTS[name]
+ chart_name = '_'.join([database_name, name])
+ order.insert(0, chart_name)
+ name, title, units, _, context, chart_type = chart_template['options']
+ definitions[chart_name] = {
+ 'options': [name, title + ': ' + database_name, units, 'db ' + database_name, context, chart_type],
+ 'lines': create_lines(database_name, chart_template['lines'])}
+
+
+def add_replication_delta_chart_(order, definitions, name, application_name):
+ def create_lines(standby, lines):
+ result = list()
+ for line in lines:
+ new_line = ['_'.join([standby, line[0]])] + line[1:]
+ result.append(new_line)
+ return result
+
+ chart_template = CHARTS[name]
+ chart_name = '_'.join([application_name, name])
+ position = order.index('database_size')
+ order.insert(position, chart_name)
+ name, title, units, family, context, chart_type = chart_template['options']
+ definitions[chart_name] = {
+ 'options': [name, title + ': ' + application_name, units, 'replication delta', context, chart_type],
+ 'lines': create_lines(application_name, chart_template['lines'])}
+
+
+def add_replication_slot_chart_(order, definitions, name, slot_name):
+ def create_lines(slot, lines):
+ result = list()
+ for line in lines:
+ new_line = ['_'.join([slot, line[0]])] + line[1:]
+ result.append(new_line)
+ return result
+
+ chart_template = CHARTS[name]
+ chart_name = '_'.join([slot_name, name])
+ position = order.index('database_size')
+ order.insert(position, chart_name)
+ name, title, units, family, context, chart_type = chart_template['options']
+ definitions[chart_name] = {
+ 'options': [name, title + ': ' + slot_name, units, 'replication slot files', context, chart_type],
+ 'lines': create_lines(slot_name, chart_template['lines'])}
diff --git a/collectors/python.d.plugin/postgres/postgres.conf b/collectors/python.d.plugin/postgres/postgres.conf
new file mode 100644
index 000000000..b69ca3717
--- /dev/null
+++ b/collectors/python.d.plugin/postgres/postgres.conf
@@ -0,0 +1,124 @@
+# netdata python.d.plugin configuration for postgresql
+#
+# This file is in YaML format. Generally the format is:
+#
+# name: value
+#
+# There are 2 sections:
+# - global variables
+# - one or more JOBS
+#
+# JOBS allow you to collect values from multiple sources.
+# Each source will have its own set of charts.
+#
+# JOB parameters have to be indented (using spaces only, example below).
+
+# ----------------------------------------------------------------------
+# Global Variables
+# These variables set the defaults for all JOBs, however each JOB
+# may define its own, overriding the defaults.
+
+# update_every sets the default data collection frequency.
+# If unset, the python.d.plugin default is used.
+# update_every: 1
+
+# priority controls the order of charts at the netdata dashboard.
+# Lower numbers move the charts towards the top of the page.
+# If unset, the default for python.d.plugin is used.
+# priority: 60000
+
+# retries sets the number of retries to be made in case of failures.
+# If unset, the default for python.d.plugin is used.
+# Attempts to restore the service are made once every update_every
+# and only if the module has collected values in the past.
+# retries: 60
+
+# autodetection_retry sets the job re-check interval in seconds.
+# The job is not deleted if check fails.
+# Attempts to start the job are made once every autodetection_retry.
+# This feature is disabled by default.
+# autodetection_retry: 0
+
+# ----------------------------------------------------------------------
+# JOBS (data collection sources)
+#
+# The default JOBS share the same *name*. JOBS with the same name
+# are mutually exclusive. Only one of them will be allowed running at
+# any time. This allows autodetection to try several alternatives and
+# pick the one that works.
+#
+# Any number of jobs is supported.
+#
+# All python.d.plugin JOBS (for all its modules) support a set of
+# predefined parameters. These are:
+#
+# job_name:
+# name: myname # the JOB's name as it will appear at the
+# # dashboard (by default is the job_name)
+# # JOBs sharing a name are mutually exclusive
+# update_every: 1 # the JOB's data collection frequency
+# priority: 60000 # the JOB's order on the dashboard
+# retries: 60 # the JOB's number of restoration attempts
+# autodetection_retry: 0 # the JOB's re-check interval in seconds
+#
+# A single connection is required in order to pull statistics.
+#
+# Connections can be configured with the following options:
+#
+# database : 'example_db_name'
+# user : 'example_user'
+# password : 'example_pass'
+# host : 'localhost'
+# port : 5432
+#
+# Additionally, the following options allow selective disabling of charts
+#
+# table_stats : false
+# index_stats : false
+# database_poll : 'dbase_name1 dbase_name2' # poll only specified databases (all other will be excluded from charts)
+#
+# Postgres permissions are configured at its pg_hba.conf file. You can
+# "trust" local clients to allow netdata to connect, or you can create
+# a postgres user for netdata and add its password below to allow
+# netdata connect.
+#
+# Postgres supported versions are :
+# - 9.3 (without autovacuum)
+# - 9.4
+# - 9.5
+# - 9.6
+# - 10
+#
+# Superuser access is needed for theses charts:
+# Write-Ahead Logs
+# Archive Write-Ahead Logs
+#
+# Autovacuum charts is allowed since Postgres 9.4
+# ----------------------------------------------------------------------
+
+socket:
+ name : 'local'
+ user : 'postgres'
+ database : 'postgres'
+
+tcp:
+ name : 'local'
+ database : 'postgres'
+ user : 'postgres'
+ host : 'localhost'
+ port : 5432
+
+tcpipv4:
+ name : 'local'
+ database : 'postgres'
+ user : 'postgres'
+ host : '127.0.0.1'
+ port : 5432
+
+tcpipv6:
+ name : 'local'
+ database : 'postgres'
+ user : 'postgres'
+ host : '::1'
+ port : 5432
+