roles/postgresql: Add role

3 files changed, 792 insertions, 0 deletions

diff --git a/roles/postgresql/files/pg_hba.conf b/roles/postgresql/files/pg_hba.conf
new file mode 100644
index 0000000..758b7f1
--- /dev/null
+++ b/roles/postgresql/files/pg_hba.conf
@@ -0,0 +1,10 @@
+# PostgreSQL Client Authentication Configuration File
+# ===================================================
+
+# TYPE  DATABASE        USER            ADDRESS                 METHOD
+local   all             all                                     trust
+host    all             all             127.0.0.1/32            trust
+host    all             all             ::1/128                 trust
+local   replication     all                                     trust
+host    replication     all             127.0.0.1/32            trust
+host    replication     all             ::1/128                 trust
diff --git a/roles/postgresql/files/postgresql.conf b/roles/postgresql/files/postgresql.conf
new file mode 100644
index 0000000..547bc30
--- /dev/null
+++ b/roles/postgresql/files/postgresql.conf
@@ -0,0 +1,750 @@
+# -----------------------------
+# PostgreSQL configuration file
+# -----------------------------
+#
+# This file consists of lines of the form:
+#
+#   name = value
+#
+# (The "=" is optional.)  Whitespace may be used.  Comments are introduced with
+# "#" anywhere on a line.  The complete list of parameter names and allowed
+# values can be found in the PostgreSQL documentation.
+#
+# The commented-out settings shown in this file represent the default values.
+# Re-commenting a setting is NOT sufficient to revert it to the default value;
+# you need to reload the server.
+#
+# This file is read on server startup and when the server receives a SIGHUP
+# signal.  If you edit the file on a running system, you have to SIGHUP the
+# server for the changes to take effect, run "pg_ctl reload", or execute
+# "SELECT pg_reload_conf()".  Some parameters, which are marked below,
+# require a server shutdown and restart to take effect.
+#
+# Any parameter can also be given as a command-line option to the server, e.g.,
+# "postgres -c log_connections=on".  Some parameters can be changed at run time
+# with the "SET" SQL command.
+#
+# Memory units:  kB = kilobytes        Time units:  ms  = milliseconds
+#                MB = megabytes                     s   = seconds
+#                GB = gigabytes                     min = minutes
+#                TB = terabytes                     h   = hours
+#                                                   d   = days
+
+
+#------------------------------------------------------------------------------
+# FILE LOCATIONS
+#------------------------------------------------------------------------------
+
+# The default values of these variables are driven from the -D command-line
+# option or PGDATA environment variable, represented here as ConfigDir.
+
+#data_directory = 'ConfigDir'		# use data in another directory
+					# (change requires restart)
+#hba_file = 'ConfigDir/pg_hba.conf'	# host-based authentication file
+					# (change requires restart)
+#ident_file = 'ConfigDir/pg_ident.conf'	# ident configuration file
+					# (change requires restart)
+
+# If external_pid_file is not explicitly set, no extra PID file is written.
+#external_pid_file = ''			# write an extra PID file
+					# (change requires restart)
+
+
+#------------------------------------------------------------------------------
+# CONNECTIONS AND AUTHENTICATION
+#------------------------------------------------------------------------------
+
+# - Connection Settings -
+
+listen_addresses = '*'		        # what IP address(es) to listen on;
+					# comma-separated list of addresses;
+					# defaults to 'localhost'; use '*' for all
+					# (change requires restart)
+#port = 5432				# (change requires restart)
+max_connections = 100			# (change requires restart)
+#superuser_reserved_connections = 3	# (change requires restart)
+unix_socket_directories = '/run/postgresql,/tmp'	# comma-separated list of directories
+					# (change requires restart)
+#unix_socket_group = ''			# (change requires restart)
+#unix_socket_permissions = 0777		# begin with 0 to use octal notation
+					# (change requires restart)
+#bonjour = off				# advertise server via Bonjour
+					# (change requires restart)
+#bonjour_name = ''			# defaults to the computer name
+					# (change requires restart)
+
+# - TCP settings -
+# see "man 7 tcp" for details
+
+#tcp_keepalives_idle = 0		# TCP_KEEPIDLE, in seconds;
+					# 0 selects the system default
+#tcp_keepalives_interval = 0		# TCP_KEEPINTVL, in seconds;
+					# 0 selects the system default
+#tcp_keepalives_count = 0		# TCP_KEEPCNT;
+					# 0 selects the system default
+#tcp_user_timeout = 0			# TCP_USER_TIMEOUT, in milliseconds;
+					# 0 selects the system default
+
+# - Authentication -
+
+#authentication_timeout = 1min		# 1s-600s
+#password_encryption = md5		# md5 or scram-sha-256
+#db_user_namespace = off
+
+# GSSAPI using Kerberos
+#krb_server_keyfile = ''
+#krb_caseins_users = off
+
+# - SSL -
+
+#ssl = off
+#ssl_ca_file = ''
+#ssl_cert_file = 'server.crt'
+#ssl_crl_file = ''
+#ssl_key_file = 'server.key'
+#ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers
+#ssl_prefer_server_ciphers = on
+#ssl_ecdh_curve = 'prime256v1'
+#ssl_min_protocol_version = 'TLSv1'
+#ssl_max_protocol_version = ''
+#ssl_dh_params_file = ''
+#ssl_passphrase_command = ''
+#ssl_passphrase_command_supports_reload = off
+
+
+#------------------------------------------------------------------------------
+# RESOURCE USAGE (except WAL)
+#------------------------------------------------------------------------------
+
+# - Memory -
+
+shared_buffers = 128MB			# min 128kB
+					# (change requires restart)
+#huge_pages = try			# on, off, or try
+					# (change requires restart)
+#temp_buffers = 8MB			# min 800kB
+#max_prepared_transactions = 0		# zero disables the feature
+					# (change requires restart)
+# Caution: it is not advisable to set max_prepared_transactions nonzero unless
+# you actively intend to use prepared transactions.
+#work_mem = 4MB				# min 64kB
+#maintenance_work_mem = 64MB		# min 1MB
+#autovacuum_work_mem = -1		# min 1MB, or -1 to use maintenance_work_mem
+#max_stack_depth = 2MB			# min 100kB
+#shared_memory_type = mmap		# the default is the first option
+					# supported by the operating system:
+					#   mmap
+					#   sysv
+					#   windows
+					# (change requires restart)
+dynamic_shared_memory_type = sysv	# the default is the first option
+					# supported by the operating system:
+					#   posix
+					#   sysv
+					#   windows
+					#   mmap
+					# (change requires restart)
+
+# - Disk -
+
+#temp_file_limit = -1			# limits per-process temp file space
+					# in kB, or -1 for no limit
+
+# - Kernel Resources -
+
+#max_files_per_process = 1000		# min 25
+					# (change requires restart)
+
+# - Cost-Based Vacuum Delay -
+
+#vacuum_cost_delay = 0			# 0-100 milliseconds (0 disables)
+#vacuum_cost_page_hit = 1		# 0-10000 credits
+#vacuum_cost_page_miss = 10		# 0-10000 credits
+#vacuum_cost_page_dirty = 20		# 0-10000 credits
+#vacuum_cost_limit = 200		# 1-10000 credits
+
+# - Background Writer -
+
+#bgwriter_delay = 200ms			# 10-10000ms between rounds
+#bgwriter_lru_maxpages = 100		# max buffers written/round, 0 disables
+#bgwriter_lru_multiplier = 2.0		# 0-10.0 multiplier on buffers scanned/round
+#bgwriter_flush_after = 512kB		# measured in pages, 0 disables
+
+# - Asynchronous Behavior -
+
+#effective_io_concurrency = 1		# 1-1000; 0 disables prefetching
+#max_worker_processes = 8		# (change requires restart)
+#max_parallel_maintenance_workers = 2	# taken from max_parallel_workers
+#max_parallel_workers_per_gather = 2	# taken from max_parallel_workers
+#parallel_leader_participation = on
+#max_parallel_workers = 8		# maximum number of max_worker_processes that
+					# can be used in parallel operations
+#old_snapshot_threshold = -1		# 1min-60d; -1 disables; 0 is immediate
+					# (change requires restart)
+#backend_flush_after = 0		# measured in pages, 0 disables
+
+
+#------------------------------------------------------------------------------
+# WRITE-AHEAD LOG
+#------------------------------------------------------------------------------
+
+# - Settings -
+
+#wal_level = replica			# minimal, replica, or logical
+					# (change requires restart)
+#fsync = on				# flush data to disk for crash safety
+					# (turning this off can cause
+					# unrecoverable data corruption)
+#synchronous_commit = on		# synchronization level;
+					# off, local, remote_write, remote_apply, or on
+#wal_sync_method = fsync		# the default is the first option
+					# supported by the operating system:
+					#   open_datasync
+					#   fdatasync (default on Linux)
+					#   fsync
+					#   fsync_writethrough
+					#   open_sync
+#full_page_writes = on			# recover from partial page writes
+#wal_compression = off			# enable compression of full-page writes
+#wal_log_hints = off			# also do full page writes of non-critical updates
+					# (change requires restart)
+#wal_init_zero = on			# zero-fill new WAL files
+#wal_recycle = on			# recycle WAL files
+#wal_buffers = -1			# min 32kB, -1 sets based on shared_buffers
+					# (change requires restart)
+#wal_writer_delay = 200ms		# 1-10000 milliseconds
+#wal_writer_flush_after = 1MB		# measured in pages, 0 disables
+
+#commit_delay = 0			# range 0-100000, in microseconds
+#commit_siblings = 5			# range 1-1000
+
+# - Checkpoints -
+
+#checkpoint_timeout = 5min		# range 30s-1d
+max_wal_size = 1GB
+min_wal_size = 80MB
+#checkpoint_completion_target = 0.5	# checkpoint target duration, 0.0 - 1.0
+#checkpoint_flush_after = 256kB		# measured in pages, 0 disables
+#checkpoint_warning = 30s		# 0 disables
+
+# - Archiving -
+
+#archive_mode = off		# enables archiving; off, on, or always
+				# (change requires restart)
+#archive_command = ''		# command to use to archive a logfile segment
+				# placeholders: %p = path of file to archive
+				#               %f = file name only
+				# e.g. 'test ! -f /mnt/server/archivedir/%f && cp %p /mnt/server/archivedir/%f'
+#archive_timeout = 0		# force a logfile segment switch after this
+				# number of seconds; 0 disables
+
+# - Archive Recovery -
+
+# These are only used in recovery mode.
+
+#restore_command = ''		# command to use to restore an archived logfile segment
+				# placeholders: %p = path of file to restore
+				#               %f = file name only
+				# e.g. 'cp /mnt/server/archivedir/%f %p'
+				# (change requires restart)
+#archive_cleanup_command = ''	# command to execute at every restartpoint
+#recovery_end_command = ''	# command to execute at completion of recovery
+
+# - Recovery Target -
+
+# Set these only when performing a targeted recovery.
+
+#recovery_target = ''		# 'immediate' to end recovery as soon as a
+                                # consistent state is reached
+				# (change requires restart)
+#recovery_target_name = ''	# the named restore point to which recovery will proceed
+				# (change requires restart)
+#recovery_target_time = ''	# the time stamp up to which recovery will proceed
+				# (change requires restart)
+#recovery_target_xid = ''	# the transaction ID up to which recovery will proceed
+				# (change requires restart)
+#recovery_target_lsn = ''	# the WAL LSN up to which recovery will proceed
+				# (change requires restart)
+#recovery_target_inclusive = on # Specifies whether to stop:
+				# just after the specified recovery target (on)
+				# just before the recovery target (off)
+				# (change requires restart)
+#recovery_target_timeline = 'latest'	# 'current', 'latest', or timeline ID
+				# (change requires restart)
+#recovery_target_action = 'pause'	# 'pause', 'promote', 'shutdown'
+				# (change requires restart)
+
+
+#------------------------------------------------------------------------------
+# REPLICATION
+#------------------------------------------------------------------------------
+
+# - Sending Servers -
+
+# Set these on the master and on any standby that will send replication data.
+
+#max_wal_senders = 10		# max number of walsender processes
+				# (change requires restart)
+#wal_keep_segments = 0		# in logfile segments; 0 disables
+#wal_sender_timeout = 60s	# in milliseconds; 0 disables
+
+#max_replication_slots = 10	# max number of replication slots
+				# (change requires restart)
+#track_commit_timestamp = off	# collect timestamp of transaction commit
+				# (change requires restart)
+
+# - Master Server -
+
+# These settings are ignored on a standby server.
+
+#synchronous_standby_names = ''	# standby servers that provide sync rep
+				# method to choose sync standbys, number of sync standbys,
+				# and comma-separated list of application_name
+				# from standby(s); '*' = all
+#vacuum_defer_cleanup_age = 0	# number of xacts by which cleanup is delayed
+
+# - Standby Servers -
+
+# These settings are ignored on a master server.
+
+#primary_conninfo = ''			# connection string to sending server
+					# (change requires restart)
+#primary_slot_name = ''			# replication slot on sending server
+					# (change requires restart)
+#promote_trigger_file = ''		# file name whose presence ends recovery
+#hot_standby = on			# "off" disallows queries during recovery
+					# (change requires restart)
+#max_standby_archive_delay = 30s	# max delay before canceling queries
+					# when reading WAL from archive;
+					# -1 allows indefinite delay
+#max_standby_streaming_delay = 30s	# max delay before canceling queries
+					# when reading streaming WAL;
+					# -1 allows indefinite delay
+#wal_receiver_status_interval = 10s	# send replies at least this often
+					# 0 disables
+#hot_standby_feedback = off		# send info from standby to prevent
+					# query conflicts
+#wal_receiver_timeout = 60s		# time that receiver waits for
+					# communication from master
+					# in milliseconds; 0 disables
+#wal_retrieve_retry_interval = 5s	# time to wait before retrying to
+					# retrieve WAL after a failed attempt
+#recovery_min_apply_delay = 0		# minimum delay for applying changes during recovery
+
+# - Subscribers -
+
+# These settings are ignored on a publisher.
+
+#max_logical_replication_workers = 4	# taken from max_worker_processes
+					# (change requires restart)
+#max_sync_workers_per_subscription = 2	# taken from max_logical_replication_workers
+
+
+#------------------------------------------------------------------------------
+# QUERY TUNING
+#------------------------------------------------------------------------------
+
+# - Planner Method Configuration -
+
+#enable_bitmapscan = on
+#enable_hashagg = on
+#enable_hashjoin = on
+#enable_indexscan = on
+#enable_indexonlyscan = on
+#enable_material = on
+#enable_mergejoin = on
+#enable_nestloop = on
+#enable_parallel_append = on
+#enable_seqscan = on
+#enable_sort = on
+#enable_tidscan = on
+#enable_partitionwise_join = off
+#enable_partitionwise_aggregate = off
+#enable_parallel_hash = on
+#enable_partition_pruning = on
+
+# - Planner Cost Constants -
+
+#seq_page_cost = 1.0			# measured on an arbitrary scale
+#random_page_cost = 4.0			# same scale as above
+#cpu_tuple_cost = 0.01			# same scale as above
+#cpu_index_tuple_cost = 0.005		# same scale as above
+#cpu_operator_cost = 0.0025		# same scale as above
+#parallel_tuple_cost = 0.1		# same scale as above
+#parallel_setup_cost = 1000.0	# same scale as above
+
+#jit_above_cost = 100000		# perform JIT compilation if available
+					# and query more expensive than this;
+					# -1 disables
+#jit_inline_above_cost = 500000		# inline small functions if query is
+					# more expensive than this; -1 disables
+#jit_optimize_above_cost = 500000	# use expensive JIT optimizations if
+					# query is more expensive than this;
+					# -1 disables
+
+#min_parallel_table_scan_size = 8MB
+#min_parallel_index_scan_size = 512kB
+#effective_cache_size = 4GB
+
+# - Genetic Query Optimizer -
+
+#geqo = on
+#geqo_threshold = 12
+#geqo_effort = 5			# range 1-10
+#geqo_pool_size = 0			# selects default based on effort
+#geqo_generations = 0			# selects default based on effort
+#geqo_selection_bias = 2.0		# range 1.5-2.0
+#geqo_seed = 0.0			# range 0.0-1.0
+
+# - Other Planner Options -
+
+#default_statistics_target = 100	# range 1-10000
+#constraint_exclusion = partition	# on, off, or partition
+#cursor_tuple_fraction = 0.1		# range 0.0-1.0
+#from_collapse_limit = 8
+#join_collapse_limit = 8		# 1 disables collapsing of explicit
+					# JOIN clauses
+#force_parallel_mode = off
+#jit = on				# allow JIT compilation
+#plan_cache_mode = auto			# auto, force_generic_plan or
+					# force_custom_plan
+
+
+#------------------------------------------------------------------------------
+# REPORTING AND LOGGING
+#------------------------------------------------------------------------------
+
+# - Where to Log -
+
+#log_destination = 'stderr'		# Valid values are combinations of
+					# stderr, csvlog, syslog, and eventlog,
+					# depending on platform.  csvlog
+					# requires logging_collector to be on.
+
+# This is used when logging to stderr:
+#logging_collector = off		# Enable capturing of stderr and csvlog
+					# into log files. Required to be on for
+					# csvlogs.
+					# (change requires restart)
+
+# These are only used if logging_collector is on:
+#log_directory = 'log'			# directory where log files are written,
+					# can be absolute or relative to PGDATA
+#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'	# log file name pattern,
+					# can include strftime() escapes
+#log_file_mode = 0600			# creation mode for log files,
+					# begin with 0 to use octal notation
+#log_truncate_on_rotation = off		# If on, an existing log file with the
+					# same name as the new log file will be
+					# truncated rather than appended to.
+					# But such truncation only occurs on
+					# time-driven rotation, not on restarts
+					# or size-driven rotation.  Default is
+					# off, meaning append to existing files
+					# in all cases.
+#log_rotation_age = 1d			# Automatic rotation of logfiles will
+					# happen after that time.  0 disables.
+#log_rotation_size = 10MB		# Automatic rotation of logfiles will
+					# happen after that much log output.
+					# 0 disables.
+
+# These are relevant when logging to syslog:
+#syslog_facility = 'LOCAL0'
+#syslog_ident = 'postgres'
+#syslog_sequence_numbers = on
+#syslog_split_messages = on
+
+# This is only relevant when logging to eventlog (win32):
+# (change requires restart)
+#event_source = 'PostgreSQL'
+
+# - When to Log -
+
+#log_min_messages = warning		# values in order of decreasing detail:
+					#   debug5
+					#   debug4
+					#   debug3
+					#   debug2
+					#   debug1
+					#   info
+					#   notice
+					#   warning
+					#   error
+					#   log
+					#   fatal
+					#   panic
+
+#log_min_error_statement = error	# values in order of decreasing detail:
+					#   debug5
+					#   debug4
+					#   debug3
+					#   debug2
+					#   debug1
+					#   info
+					#   notice
+					#   warning
+					#   error
+					#   log
+					#   fatal
+					#   panic (effectively off)
+
+#log_min_duration_statement = -1	# -1 is disabled, 0 logs all statements
+					# and their durations, > 0 logs only
+					# statements running at least this number
+					# of milliseconds
+
+#log_transaction_sample_rate = 0.0	# Fraction of transactions whose statements
+					# are logged regardless of their duration. 1.0 logs all
+					# statements from all transactions, 0.0 never logs.
+
+# - What to Log -
+
+#debug_print_parse = off
+#debug_print_rewritten = off
+#debug_print_plan = off
+#debug_pretty_print = on
+#log_checkpoints = off
+#log_connections = off
+#log_disconnections = off
+#log_duration = off
+#log_error_verbosity = default		# terse, default, or verbose messages
+#log_hostname = off
+#log_line_prefix = '%m [%p] '		# special values:
+					#   %a = application name
+					#   %u = user name
+					#   %d = database name
+					#   %r = remote host and port
+					#   %h = remote host
+					#   %p = process ID
+					#   %t = timestamp without milliseconds
+					#   %m = timestamp with milliseconds
+					#   %n = timestamp with milliseconds (as a Unix epoch)
+					#   %i = command tag
+					#   %e = SQL state
+					#   %c = session ID
+					#   %l = session line number
+					#   %s = session start timestamp
+					#   %v = virtual transaction ID
+					#   %x = transaction ID (0 if none)
+					#   %q = stop here in non-session
+					#        processes
+					#   %% = '%'
+					# e.g. '<%u%%%d> '
+#log_lock_waits = off			# log lock waits >= deadlock_timeout
+#log_statement = 'none'			# none, ddl, mod, all
+#log_replication_commands = off
+#log_temp_files = -1			# log temporary files equal or larger
+					# than the specified size in kilobytes;
+					# -1 disables, 0 logs all temp files
+log_timezone = 'UTC'
+
+#------------------------------------------------------------------------------
+# PROCESS TITLE
+#------------------------------------------------------------------------------
+
+#cluster_name = ''			# added to process titles if nonempty
+					# (change requires restart)
+#update_process_title = on
+
+
+#------------------------------------------------------------------------------
+# STATISTICS
+#------------------------------------------------------------------------------
+
+# - Query and Index Statistics Collector -
+
+#track_activities = on
+#track_counts = on
+#track_io_timing = off
+#track_functions = none			# none, pl, all
+#track_activity_query_size = 1024	# (change requires restart)
+#stats_temp_directory = 'pg_stat_tmp'
+
+
+# - Monitoring -
+
+#log_parser_stats = off
+#log_planner_stats = off
+#log_executor_stats = off
+#log_statement_stats = off
+
+
+#------------------------------------------------------------------------------
+# AUTOVACUUM
+#------------------------------------------------------------------------------
+
+#autovacuum = on			# Enable autovacuum subprocess?  'on'
+					# requires track_counts to also be on.
+#log_autovacuum_min_duration = -1	# -1 disables, 0 logs all actions and
+					# their durations, > 0 logs only
+					# actions running at least this number
+					# of milliseconds.
+#autovacuum_max_workers = 3		# max number of autovacuum subprocesses
+					# (change requires restart)
+#autovacuum_naptime = 1min		# time between autovacuum runs
+#autovacuum_vacuum_threshold = 50	# min number of row updates before
+					# vacuum
+#autovacuum_analyze_threshold = 50	# min number of row updates before
+					# analyze
+#autovacuum_vacuum_scale_factor = 0.2	# fraction of table size before vacuum
+#autovacuum_analyze_scale_factor = 0.1	# fraction of table size before analyze
+#autovacuum_freeze_max_age = 200000000	# maximum XID age before forced vacuum
+					# (change requires restart)
+#autovacuum_multixact_freeze_max_age = 400000000	# maximum multixact age
+					# before forced vacuum
+					# (change requires restart)
+#autovacuum_vacuum_cost_delay = 2ms	# default vacuum cost delay for
+					# autovacuum, in milliseconds;
+					# -1 means use vacuum_cost_delay
+#autovacuum_vacuum_cost_limit = -1	# default vacuum cost limit for
+					# autovacuum, -1 means use
+					# vacuum_cost_limit
+
+
+#------------------------------------------------------------------------------
+# CLIENT CONNECTION DEFAULTS
+#------------------------------------------------------------------------------
+
+# - Statement Behavior -
+
+#client_min_messages = notice		# values in order of decreasing detail:
+					#   debug5
+					#   debug4
+					#   debug3
+					#   debug2
+					#   debug1
+					#   log
+					#   notice
+					#   warning
+					#   error
+#search_path = '"$user", public'	# schema names
+#row_security = on
+#default_tablespace = ''		# a tablespace name, '' uses the default
+#temp_tablespaces = ''			# a list of tablespace names, '' uses
+					# only default tablespace
+#default_table_access_method = 'heap'
+#check_function_bodies = on
+#default_transaction_isolation = 'read committed'
+#default_transaction_read_only = off
+#default_transaction_deferrable = off
+#session_replication_role = 'origin'
+#statement_timeout = 0			# in milliseconds, 0 is disabled
+#lock_timeout = 0			# in milliseconds, 0 is disabled
+#idle_in_transaction_session_timeout = 0	# in milliseconds, 0 is disabled
+#vacuum_freeze_min_age = 50000000
+#vacuum_freeze_table_age = 150000000
+#vacuum_multixact_freeze_min_age = 5000000
+#vacuum_multixact_freeze_table_age = 150000000
+#vacuum_cleanup_index_scale_factor = 0.1	# fraction of total number of tuples
+						# before index cleanup, 0 always performs
+						# index cleanup
+#bytea_output = 'hex'			# hex, escape
+#xmlbinary = 'base64'
+#xmloption = 'content'
+#gin_fuzzy_search_limit = 0
+#gin_pending_list_limit = 4MB
+
+# - Locale and Formatting -
+
+datestyle = 'iso, mdy'
+#intervalstyle = 'postgres'
+timezone = 'UTC'
+#timezone_abbreviations = 'Default'     # Select the set of available time zone
+					# abbreviations.  Currently, there are
+					#   Default
+					#   Australia (historical usage)
+					#   India
+					# You can create your own file in
+					# share/timezonesets/.
+#extra_float_digits = 1			# min -15, max 3; any value >0 actually
+					# selects precise output mode
+#client_encoding = sql_ascii		# actually, defaults to database
+					# encoding
+
+# These settings are initialized by initdb, but they can be changed.
+lc_messages = 'C'			# locale for system error message
+					# strings
+lc_monetary = 'C'			# locale for monetary formatting
+lc_numeric = 'C'			# locale for number formatting
+lc_time = 'C'				# locale for time formatting
+
+# default configuration for text search
+default_text_search_config = 'pg_catalog.english'
+
+# - Shared Library Preloading -
+
+#shared_preload_libraries = ''	# (change requires restart)
+#local_preload_libraries = ''
+#session_preload_libraries = ''
+#jit_provider = 'llvmjit'		# JIT library to use
+
+# - Other Defaults -
+
+#dynamic_library_path = '$libdir'
+
+
+#------------------------------------------------------------------------------
+# LOCK MANAGEMENT
+#------------------------------------------------------------------------------
+
+#deadlock_timeout = 1s
+#max_locks_per_transaction = 64		# min 10
+					# (change requires restart)
+#max_pred_locks_per_transaction = 64	# min 10
+					# (change requires restart)
+#max_pred_locks_per_relation = -2	# negative values mean
+					# (max_pred_locks_per_transaction
+					#  / -max_pred_locks_per_relation) - 1
+#max_pred_locks_per_page = 2            # min 0
+
+
+#------------------------------------------------------------------------------
+# VERSION AND PLATFORM COMPATIBILITY
+#------------------------------------------------------------------------------
+
+# - Previous PostgreSQL Versions -
+
+#array_nulls = on
+#backslash_quote = safe_encoding	# on, off, or safe_encoding
+#escape_string_warning = on
+#lo_compat_privileges = off
+#operator_precedence_warning = off
+#quote_all_identifiers = off
+#standard_conforming_strings = on
+#synchronize_seqscans = on
+
+# - Other Platforms and Clients -
+
+#transform_null_equals = off
+
+
+#------------------------------------------------------------------------------
+# ERROR HANDLING
+#------------------------------------------------------------------------------
+
+#exit_on_error = off			# terminate session on any error?
+#restart_after_crash = on		# reinitialize after backend crash?
+#data_sync_retry = off			# retry or panic on failure to fsync
+					# data?
+					# (change requires restart)
+
+
+#------------------------------------------------------------------------------
+# CONFIG FILE INCLUDES
+#------------------------------------------------------------------------------
+
+# These options allow settings to be loaded from files other than the
+# default postgresql.conf.  Note that these are directives, not variable
+# assignments, so they can usefully be given more than once.
+
+#include_dir = '...'			# include files ending in '.conf' from
+					# a directory, e.g., 'conf.d'
+#include_if_exists = '...'		# include file only if it exists
+#include = '...'			# include file
+
+
+#------------------------------------------------------------------------------
+# CUSTOMIZED OPTIONS
+#------------------------------------------------------------------------------
+
+# Add settings for extensions here
diff --git a/roles/postgresql/main.yml b/roles/postgresql/main.yml
new file mode 100644
index 0000000..2ab2498
--- /dev/null
+++ b/roles/postgresql/main.yml
@@ -0,0 +1,32 @@
+---
+# Target: alpine3.11
+- name: Install PostgreSQL server
+  hosts: postgresql
+  vars:
+    config_path: /etc/postgresql
+  tasks:
+  - name: Installing the application
+    apk:
+      state: present
+      update_cache: yes
+      name:
+        - postgresql
+  - name: Copying main configuration file
+    copy:
+      src: postgresql.conf
+      owner: postgres
+      group: postgres
+      dest: "{{ config_path }}"
+      mode: '0600'
+  - name: Copying client authentication configuration file
+    copy:
+      src: pg_hba.conf
+      owner: postgres
+      group: postgres
+      dest: "{{ config_path }}"
+      mode: '0600'
+  - name: Ensuring PostgreSQL has been enabled and started
+    service:
+      name: postgresql
+      state: started
+      enabled: yes
\ No newline at end of file