# ---------------------------- # pgPool-II configuration file # ---------------------------- # # This file consists of lines of the form: # # name = value # # 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 # pgPool-II documentation. # # 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, or use "pgpool reload". Some # parameters, which are marked below, require a server shutdown and restart to # take effect. # #------------------------------------------------------------------------------ # CONNECTIONS #------------------------------------------------------------------------------ # - pgpool Connection Settings - listen_addresses = '{{ pgpool_listen_addresses }}' # Host name or IP address to listen on: # '*' for all, '' for no TCP/IP connections # (change requires restart) port = {{ pgpool_port }} # Port number # (change requires restart) socket_dir = '/var/run/postgresql' # Unix domain socket path # The Debian package defaults to # /var/run/postgresql # (change requires restart) listen_backlog_multiplier = {{ pgpool_listen_backlog_multiplier }} # Set the backlog parameter of listen(2) to # num_init_children * listen_backlog_multiplier. # (change requires restart) # - pgpool Communication Manager Connection Settings - pcp_listen_addresses = '{{ pgpool_pcp_listen_addresses }}' # Host name or IP address for pcp process to listen on: # '*' for all, '' for no TCP/IP connections # (change requires restart) pcp_port = {{ pgpool_pcp_port }} # Port number for pcp # (change requires restart) pcp_socket_dir = '/var/run/postgresql' # Unix domain socket path for pcp # The Debian package defaults to # /var/run/postgresql # (change requires restart) # - Backend Connection Settings - {% for bk in pgpool_backends %} backend_hostname{{ bk.id}} = '{{ bk.hostname }}' backend_port{{ bk.id }} = {{ bk.backend_port }} backend_weight{{ bk.id }} = {{ bk.backend_weight }} backend_data_directory{{ bk.id }} = '{{ bk.backend_data_directory }}' backend_flag{{ bk.id }} = '{{ bk.backend_flag }}' {% endfor %} # - Authentication - enable_pool_hba = {{ pgpool_enable_pool_hba }} # Use pool_hba.conf for client authentication pool_passwd = '{{ pgpool_pool_passwd }}' # File name of pool_passwd for md5 authentication. # "" disables pool_passwd. # (change requires restart) authentication_timeout = 60 # Delay in seconds to complete client authentication # 0 means no timeout. {% if pgpool_enable_ssl %} # - SSL Connections - ssl = on ssl_key = '{{ pgpool_ssl_key }}' ssl_cert = '{{ pgpool_ssl_cert }}' ssl_ca_cert = '{{ pgpool_ssl_ca }}' ssl_ca_cert_dir = '{{ pgpool_ssl_ca_dir }}' {% endif %} #------------------------------------------------------------------------------ # POOLS #------------------------------------------------------------------------------ # - Pool size - num_init_children = {{ pgpool_num_init_children }} # Number of pools # (change requires restart) max_pool = {{ pgpool_max_pool }} # Number of connections per pool # (change requires restart) # - Life time - child_life_time = {{ pgpool_child_life_time }} # Pool exits after being idle for this many seconds child_max_connections = {{ pgpool_child_max_connections }} # Pool exits after receiving that many connections # 0 means no exit connection_life_time = {{ pgpool_connection_life_time }} # Connection to backend closes after being idle for this many seconds # 0 means no close client_idle_limit = {{ pgpool_client_idle_limit }} # Client is disconnected after being idle for that many seconds # (even inside an explicit transactions!) # 0 means no disconnection #------------------------------------------------------------------------------ # LOGS #------------------------------------------------------------------------------ # - Where to log - log_destination = '{{ pgpool_log_destination }}' # Where to log # Valid values are combinations of stderr, # and syslog. Default to stderr. # - What to log - log_line_prefix = '%t: pid %p: ' # printf-style string to output at beginning of each log line. log_connections = {{ pgpool_log_connections }} # Log connections log_hostname = {{ pgpool_log_hostname }} # Hostname will be shown in ps status # and in logs if connections are logged log_statement = {{ pgpool_log_statement }} # Log all statements log_per_node_statement = {{ pgpool_log_per_node_statement }} # Log all statements # with node and backend informations log_standby_delay = 'none' # Log standby delay # Valid values are combinations of always, # if_over_threshold, none # - Syslog specific - syslog_facility = 'LOCAL0' # Syslog local facility. Default to LOCAL0 syslog_ident = 'pgpool' # Syslog program identification string # Default to 'pgpool' # - Debug - debug_level = {{ pgpool_debug_level }} # Debug message verbosity level # 0 means no message, 1 or more mean verbose #log_error_verbosity = default # terse, default, or verbose messages #client_min_messages = notice # values in order of decreasing detail: # debug5 # debug4 # debug3 # debug2 # debug1 # log # notice # warning # error #log_min_messages = warning # values in order of decreasing detail: # debug5 # debug4 # debug3 # debug2 # debug1 # info # notice # warning # error # log # fatal # panic #------------------------------------------------------------------------------ # FILE LOCATIONS #------------------------------------------------------------------------------ pid_file_name = '/var/run/postgresql/pgpool.pid' # PID file name # (change requires restart) logdir = '/var/log/postgresql' # Directory of pgPool status file # (change requires restart) #------------------------------------------------------------------------------ # CONNECTION POOLING #------------------------------------------------------------------------------ connection_cache = on # Activate connection pools # (change requires restart) # Semicolon separated list of queries # to be issued at the end of a session # The default is for 8.3 and later reset_query_list = 'ABORT; DISCARD ALL' # The following one is for 8.2 and before #reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT' serialize_accept = {{ pgpool_serialize_accept }} #------------------------------------------------------------------------------ # REPLICATION MODE #------------------------------------------------------------------------------ replication_mode = {{ pgpool_replication_mode }} # Activate replication mode # (change requires restart) replicate_select = {{ pgpool_replicate_select }} # Replicate SELECT statements # when in replication mode # replicate_select is higher priority than # load_balance_mode. insert_lock = {{ pgpool_insert_lock }} # Automatically locks a dummy row or a table # with INSERT statements to keep SERIAL data # consistency # Without SERIAL, no lock will be issued lobj_lock_table = '{{ pgpool_lobj_lock_table }}' # When rewriting lo_creat command in # replication mode, specify table name to # lock # - Degenerate handling - replication_stop_on_mismatch = {{ pgpool_replication_stop_on_mismatch }} # On disagreement with the packet kind # sent from backend, degenerate the node # which is most likely "minority" # If off, just force to exit this session failover_if_affected_tuples_mismatch = {{ pgpool_failover_if_affected_tuples_mismatch }} # On disagreement with the number of affected # tuples in UPDATE/DELETE queries, then # degenerate the node which is most likely # "minority". # If off, just abort the transaction to # keep the consistency #------------------------------------------------------------------------------ # LOAD BALANCING MODE #------------------------------------------------------------------------------ load_balance_mode = {{ pgpool_load_balance_mode }} # Activate load balancing mode # (change requires restart) ignore_leading_white_space = {{ pgpool_ignore_leading_white_space }} # Ignore leading white spaces of each query white_function_list = '{{ pgpool_white_function_list }}' # Comma separated list of function names # that don't write to database # Regexp are accepted black_function_list = '{{ pgpool_black_function_list }}' # Comma separated list of function names # that write to database # Regexp are accepted database_redirect_preference_list = '' # comma separated list of pairs of database and node id. # example: postgres:primary,mydb[0-4]:1,mydb[5-9]:2' # valid for streaming replicaton mode only. app_name_redirect_preference_list = '' # comma separated list of pairs of app name and node id. # example: 'psql:primary,myapp[0-4]:1,myapp[5-9]:standby' # valid for streaming replicaton mode only. allow_sql_comments = {{ pgpool_allow_sql_comments }} # if on, ignore SQL comments when judging if load balance or # query cache is possible. # If off, SQL comments effectively prevent the judgment # (pre 3.4 behavior). #------------------------------------------------------------------------------ # MASTER/SLAVE MODE #------------------------------------------------------------------------------ master_slave_mode = off # Activate master/slave mode # (change requires restart) master_slave_sub_mode = 'slony' # Master/slave sub mode # Valid values are combinations slony or # stream. Default is slony. # (change requires restart) # - Streaming - sr_check_period = 0 # Streaming replication check period # Disabled (0) by default sr_check_user = 'nobody' # Streaming replication check user # This is neccessary even if you disable streaming # replication delay check by sr_check_period = 0 sr_check_password = '' # Password for streaming replication check user delay_threshold = 0 # Threshold before not dispatching query to standby node # Unit is in bytes # Disabled (0) by default # - Special commands - follow_master_command = '' # Executes this command after master failover # Special values: # %d = node id # %h = host name # %p = port number # %D = database cluster path # %m = new master node id # %H = hostname of the new master node # %M = old master node id # %P = old primary node id # %r = new master port number # %R = new master database cluster path # %% = '%' character #------------------------------------------------------------------------------ # HEALTH CHECK #------------------------------------------------------------------------------ health_check_period = 0 # Health check period # Disabled (0) by default health_check_timeout = 20 # Health check timeout # 0 means no timeout health_check_user = 'nobody' # Health check user health_check_password = '' # Password for health check user health_check_max_retries = 0 # Maximum number of times to retry a failed health check before giving up. health_check_retry_delay = 1 # Amount of time to wait (in seconds) between retries. connect_timeout = 10000 # Timeout value in milliseconds before giving up to connect to backend. # Default is 10000 ms (10 second). Flaky network user may want to increase # the value. 0 means no timeout. # Note that this value is not only used for health check, # but also for ordinary conection to backend. #------------------------------------------------------------------------------ # FAILOVER AND FAILBACK #------------------------------------------------------------------------------ failover_command = '' # Executes this command at failover # Special values: # %d = node id # %h = host name # %p = port number # %D = database cluster path # %m = new master node id # %H = hostname of the new master node # %M = old master node id # %P = old primary node id # %r = new master port number # %R = new master database cluster path # %% = '%' character failback_command = '' # Executes this command at failback. # Special values: # %d = node id # %h = host name # %p = port number # %D = database cluster path # %m = new master node id # %H = hostname of the new master node # %M = old master node id # %P = old primary node id # %r = new master port number # %R = new master database cluster path # %% = '%' character fail_over_on_backend_error = {{ pgpool_fail_over_on_backend_error }} # Initiates failover when reading/writing to the # backend communication socket fails # If set to off, pgpool will report an # error and disconnect the session. search_primary_node_timeout = 10 # Timeout in seconds to search for the # primary node when a failover occurs. # 0 means no timeout, keep searching # for a primary node forever. #------------------------------------------------------------------------------ # ONLINE RECOVERY #------------------------------------------------------------------------------ recovery_user = '{{ pgpool_recovery_user }}' # Online recovery user {% if pgpool_recovery_user_pwd is defined %} recovery_password = '{{ pgpool_recovery_user_pwd | default() }}' # Online recovery password {% else %} recovery_password = '' {% endif %} recovery_1st_stage_command = '{{ pgpool_recovery_stage1_script }}' # Executes a command in first stage recovery_2nd_stage_command = '{{ pgpool_recovery_stage2_script }}' # Executes a command in second stage recovery_timeout = {{ pgpool_recovery_timeout }} # Timeout in seconds to wait for the # recovering node's postmaster to start up # 0 means no wait client_idle_limit_in_recovery = {{ pgpool_client_idle_limit_in_recovery }} # Client is disconnected after being idle # for that many seconds in the second stage # of online recovery # 0 means no disconnection # -1 means immediate disconnection #------------------------------------------------------------------------------ # WATCHDOG #------------------------------------------------------------------------------ # - Enabling - use_watchdog = {{ pgpool_use_watchdog }} # Activates watchdog # (change requires restart) # -Connection to up stream servers - trusted_servers = '{{ pgpool_wd_trusted_servers }}' # trusted server list which are used # to confirm network connection # (hostA,hostB,hostC,...) # (change requires restart) ping_path = '/bin' # ping command path # (change requires restart) # - Watchdog communication Settings - wd_hostname = '{{ ansible_default_ipv4.address }}' # Host name or IP address of this watchdog # (change requires restart) wd_port = 9000 # port number for watchdog service # (change requires restart) wd_authkey = '{{ pgpool_wd_authkey }}' # Authentication key for watchdog communication # (change requires restart) # - Virtual IP control Setting - delegate_IP = '{{ pgpool_virtual_ip }}' # delegate IP address # If this is empty, virtual IP never bring up. # (change requires restart) if_cmd_path = '/sbin' # ifconfig command path # (change requires restart) if_up_cmd = 'ip_script addr add {{ pgpool_virtual_ip }}/{{ pgpool_virtual_netmask }} dev {{ ansible_default_ipv4.alias }}' # startup delegate IP command # (change requires restart) if_down_cmd = 'ip_script addr del {{ pgpool_virtual_ip }}/{{ pgpool_virtual_netmask }} dev {{ ansible_default_ipv4.alias }}' # shutdown delegate IP command # (change requires restart) arping_path = '/usr/local/bin' # arping command path # (change requires restart) arping_cmd = 'arping_script -U $_IP_$ -w 1' # arping command # (change requires restart) # - Behaivor on escalation Setting - clear_memqcache_on_escalation = on # Clear all the query cache on shared memory # when standby pgpool escalate to active pgpool # (= virtual IP holder). # This should be off if client connects to pgpool # not using virtual IP. # (change requires restart) wd_escalation_command = 'date >> {{ psql_log_dir }}/wd_pgpool_escalation.log' # Executes this command at escalation on new active pgpool. # (change requires restart) wd_de_escalation_command = 'date >> {{ psql_log_dir }}/wd_pgpool_de_escalation.log' # - Lifecheck Setting - # -- common -- wd_lifecheck_method = 'heartbeat' # Method of watchdog lifecheck ('heartbeat' or 'query') # (change requires restart) wd_interval = 10 # lifecheck interval (sec) > 0 # (change requires restart) wd_priority = {{ pgpool_wd_priority }} {% if pgpool_wd_heartbeat_mode %} # -- heartbeat mode -- wd_heartbeat_port = {{ pgpool_wd_heartbeat_port }} # Port number for receiving heartbeat signal # (change requires restart) wd_heartbeat_keepalive = {{ pgpool_wd_heartbeat_keepalive_int }} # Interval time of sending heartbeat signal (sec) # (change requires restart) wd_heartbeat_deadtime = {{ pgpool_wd_heartbeat_deadtime }} # Deadtime interval for heartbeat signal (sec) # (change requires restart) heartbeat_destination0 = '{{ pgpool_wd_heartbeat_dest0 }}' # Host name or IP address of destination 0 # for sending heartbeat signal. # (change requires restart) heartbeat_destination_port0 = {{ pgpool_wd_heartbeat_dest0_port }} # Port number of destination 0 for sending # heartbeat signal. Usually this is the # same as wd_heartbeat_port. # (change requires restart) heartbeat_device0 = '' # Name of NIC device (such like 'eth0') # used for sending/receiving heartbeat # signal to/from destination 0. # This works only when this is not empty # and pgpool has root privilege. # (change requires restart) {% else %} # -- query mode -- wd_life_point = 3 # lifecheck retry times # (change requires restart) wd_lifecheck_query = 'SELECT 1' # lifecheck query to pgpool from watchdog # (change requires restart) wd_lifecheck_dbname = 'template1' # Database name connected for lifecheck # (change requires restart) wd_lifecheck_user = 'nobody' # watchdog user monitoring pgpools in lifecheck # (change requires restart) wd_lifecheck_password = '' # Password for watchdog user in lifecheck # (change requires restart) {% endif %} # - Other pgpool Connection Settings - other_pgpool_hostname0 = '{{ pgpool_wd_heartbeat_dest0 }}' # Host name or IP address to connect to for other pgpool 0 # (change requires restart) other_pgpool_port0 = {{ pgpool_port }} # Port number for othet pgpool 0 # (change requires restart) other_wd_port0 = {{ pgpool_wd_port }} # Port number for othet watchdog 0 # (change requires restart) #------------------------------------------------------------------------------ # OTHERS #------------------------------------------------------------------------------ relcache_expire = {{ pgpool_relcache_expire }} # Life time of relation cache in seconds. # 0 means no cache expiration(the default). # The relation cache is used for cache the # query result against PostgreSQL system # catalog to obtain various information # including table structures or if it's a # temporary table or not. The cache is # maintained in a pgpool child local memory # and being kept as long as it survives. # If someone modify the table by using # ALTER TABLE or some such, the relcache is # not consistent anymore. # For this purpose, cache_expiration # controls the life time of the cache. relcache_size = 256 # Number of relation cache # entry. If you see frequently: # "pool_search_relcache: cache replacement happend" # in the pgpool log, you might want to increate this number. check_temp_table = on # If on, enable temporary table check in SELECT statements. # This initiates queries against system catalog of primary/master # thus increases load of master. # If you are absolutely sure that your system never uses temporary tables # and you want to save access to primary/master, you could turn this off. # Default is on. check_unlogged_table = on # If on, enable unlogged table check in SELECT statements. # This initiates queries against system catalog of primary/master # thus increases load of master. # If you are absolutely sure that your system never uses unlogged tables # and you want to save access to primary/master, you could turn this off. # Default is on. #------------------------------------------------------------------------------ # IN MEMORY QUERY MEMORY CACHE #------------------------------------------------------------------------------ memory_cache_enabled = {{ pgpool_memory_cache_enabled }} # If on, use the memory cache functionality, off by default memqcache_method = '{{ pgpool_memqcache_method }}' # Cache storage method. either 'shmem'(shared memory) or # 'memcached'. 'shmem' by default # (change requires restart) memqcache_memcached_host = '{{ pgpool_memqcache_memcached_host }}' # Memcached host name or IP address. Mandatory if # memqcache_method = 'memcached'. # Defaults to localhost. # (change requires restart) memqcache_memcached_port = {{ pgpool_memqcache_memcached_port }} # Memcached port number. Mondatory if memqcache_method = 'memcached'. # Defaults to 11211. # (change requires restart) memqcache_total_size = 67108864 # Total memory size in bytes for storing memory cache. # Mandatory if memqcache_method = 'shmem'. # Defaults to 64MB. # (change requires restart) memqcache_max_num_cache = 1000000 # Total number of cache entries. Mandatory # if memqcache_method = 'shmem'. # Each cache entry consumes 48 bytes on shared memory. # Defaults to 1,000,000(45.8MB). # (change requires restart) memqcache_expire = {{ pgpool_memqcache_expire }} # Memory cache entry life time specified in seconds. # 0 means infinite life time. 0 by default. # (change requires restart) memqcache_auto_cache_invalidation = {{ pgpool_memqcache_auto_cache_invalidation }} # If on, invalidation of query cache is triggered by corresponding # DDL/DML/DCL(and memqcache_expire). If off, it is only triggered # by memqcache_expire. on by default. # (change requires restart) memqcache_maxcache = 409600 # Maximum SELECT result size in bytes. # Must be smaller than memqcache_cache_block_size. Defaults to 400KB. # (change requires restart) memqcache_cache_block_size = 1048576 # Cache block size in bytes. Mandatory if memqcache_method = 'shmem'. # Defaults to 1MB. # (change requires restart) memqcache_oiddir = '/var/log/pgpool/oiddir' # Temporary work directory to record table oids # (change requires restart) white_memqcache_table_list = '' # Comma separated list of table names to memcache # that don't write to database # Regexp are accepted black_memqcache_table_list = '' # Comma separated list of table names not to memcache # that don't write to database # Regexp are accepted