bundlewrap/bundles/postgresql/metadata.py

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defaults = {
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'apt': {
'repos': {
'postgresql': {
'items': {
'deb https://apt.postgresql.org/pub/repos/apt/ {os_release}-pgdg main',
},
},
},
},
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'backups': {
'paths': {
'/var/lib/postgresql',
},
},
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'bash_functions': {
'pg_query_mon': "watch -n 2 \"echo \\\"SELECT pid, age(clock_timestamp(), query_start), usename, query FROM pg_stat_activity WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' ORDER BY query_start desc;\\\" | psql postgres\""
},
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'icinga2_api': {
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'postgresql': {
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'services': {
'POSTGRESQL PROCESS': {
'command_on_monitored_host': '/usr/lib/nagios/plugins/check_procs -C postgres -c 1:',
},
},
},
},
'postgresql': {
'max_connections': 100,
'autovacuum_max_workers': 3,
'maintenance_work_mem': 64,
'work_mem': 4,
'shared_buffers': 128,
'temp_buffers': 8,
'slow_query_log_sec': 0,
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'cache_size': 256,
},
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}
if node.has_bundle('telegraf'):
defaults['telegraf'] = {
'input_plugins': {
'builtin': {
'postgresql': [{
'address': repo.vault.password_for(f'{node.name} postgresql telegraf').format_into('postgres://telegraf:{}@localhost:5432/telegraf?sslmode=disable'),
'ignored_databases': [
'template0',
'template1',
'telegraf',
],
}],
},
},
}
defaults['postgresql'].update({
'roles': {
'telegraf': {
'password': repo.vault.password_for(f'{node.name} postgresql telegraf'),
},
},
'databases': {
'telegraf': {
'owner': 'telegraf',
},
},
})
if node.has_bundle('zfs'):
defaults['zfs'] = {
'datasets': {
'tank/postgresql': {
'mountpoint': '/var/lib/postgresql',
'recordsize': '8192',
},
},
}
else:
defaults['backups']['paths'].add('/var/tmp/postgresdumps')
@metadata_reactor.provides(
'postgresql/effective_io_concurrency',
'postgresql/max_worker_processes',
'postgresql/max_parallel_workers',
'postgresql/max_parallel_workers_per_gather',
)
def worker_processes(metadata):
return {
'postgresql': {
# This is the amount of parallel I/O Operations the
# postgresql process is allowed to do on disk. We set
# this to max_connections by default.
'effective_io_concurrency': metadata.get('postgresql/max_connections'),
# Try to request one worker process per 10 configured
# connections. The default is 8 for both of these values.
'max_worker_processes': int(metadata.get('postgresql/max_connections')/10),
'max_parallel_workers': int(metadata.get('postgresql/max_connections')/10),
# default 2
'max_parallel_workers_per_gather': max(int(metadata.get('postgresql/max_connections')/100), 2),
},
}