[pgpool-general: 7166] Re: After FailOver.SH Both nodes remain on standby :(
Tatsuo Ishii
ishii at sraoss.co.jp
Tue Jul 28 14:07:25 JST 2020
It seems your failover scrit does something questionable:
> + su postgres -c 'ssh -T postgres at 1.1.1.101 touch /home/postgres/databases/SECRET/trigger'
Standard trigger file name is "trigger_file", not "trigger". Are you
sue that it is intended?
> Hi Tatsuo, I hope this email finds you well
>
> in the log below at the end of the failover process
> pgpool does not promote one of the servers to primary role,
> you are more than welcome to see attached logs and configuration
>
> Thanks :)
>
> + psql -U XXXX -h 10.65.181.99 -p 9999 -c 'show pool_nodes'
> node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay
> ---------+-----------+------+--------+-----------+---------+------------+-------------------+-------------------
> 0 | 1.1.1.100 | 5432 | up | 0.500000 | primary | 948945 | true | 0
> 1 | 1.1.1.101 | 5432 | up | 0.500000 | standby | 0 | false | 0
> (2 rows)
>
> + monit stop postgresql9 <--- on 1.1.1.100
>
> psql -U XXXXX -h 10.65.181.99 -p 9999 -c 'show pool_nodes'
> node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay
> ---------+-----------+------+--------+-----------+---------+------------+-------------------+-------------------
> 0 | 1.1.1.100 | 5432 | up | 0.500000 | primary | 948945 | true | 0
> 1 | 1.1.1.101 | 5432 | up | 0.500000 | standby | 0 | false | 0
> (2 rows)
> + psql -U XXXXX -h 10.65.181.99 -p 9999 -c 'show pool_nodes'
> node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_delay
> ---------+-----------+------+--------+-----------+---------+------------+-------------------+-------------------
> 0 | 1.1.1.100 | 5432 | down | 0.500000 | standby | 948945 | false | 0
> 1 | 1.1.1.101 | 5432 | up | 0.500000 | standby | 0 | true | 0
> (2 rows)
>
>
> --- logfile pgpool primary
> 2020-07-20 09:24:11: pid 4076: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:11: pid 4076: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:11: pid 4076: LOG: pgpool-II successfully started. version 3.6.6 (subaruboshi)
> 2020-07-20 09:24:11: pid 4076: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:11: pid 4076: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:11: pid 4076: LOG: setting backend node 0 status to NODE DOWN
> 2020-07-20 09:24:11: pid 4076: LOG: received degenerate backend request for node_id: 0 from pid [4076]
> 2020-07-20 09:24:11: pid 4078: LOG: new IPC connection received
> 2020-07-20 09:24:11: pid 4078: LOG: watchdog received the failover command from local pgpool-II on IPC interface
> 2020-07-20 09:24:11: pid 4078: LOG: watchdog is processing the failover command [DEGENERATE_BACKEND_REQUEST] received from local pgpool-II on IPC interface
> 2020-07-20 09:24:11: pid 4078: LOG: forwarding the failover request [DEGENERATE_BACKEND_REQUEST] to all alive nodes
> 2020-07-20 09:24:11: pid 4078: LOG: new IPC connection received
> 2020-07-20 09:24:11: pid 4078: LOG: received the failover command lock request from local pgpool-II on IPC interface
> 2020-07-20 09:24:11: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" is requesting to become a lock holder for failover ID: 3424
> 2020-07-20 09:24:11: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" is the lock holder
> 2020-07-20 09:24:11: pid 4076: LOG: starting degeneration. shutdown host 1.1.1.100(5432)
> 2020-07-20 09:24:11: pid 4078: LOG: received the failover command lock request from remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:11: pid 4078: LOG: remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101" is requesting to become a lock holder for failover ID: 3424
> 2020-07-20 09:24:11: pid 4078: LOG: lock holder request denied to remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:11: pid 4076: LOG: Restart all children
> 2020-07-20 09:24:11: pid 4076: LOG: execute command: /etc/pgpool-II/recovery/failover.sh 0 0 1.1.1.101 /home/postgres/databases/SECRET
> + FALLING_NODE=0
> + OLDPRIMARY_NODE=0
> + NEW_PRIMARY=1.1.1.101
> + PGDATA=/home/postgres/databases/SECRET
> + PGHOME=/home/postgres
> + log 'failover to 1.1.1.101 host. creating /home/postgres/databases/SECRET/trigger file.'
> + '[' '!' 'failover to 1.1.1.101 host. creating /home/postgres/databases/SECRET/trigger file.' ']'
> ++ /bin/date '+%m/%d/%y %H:%M:%S.%2N'
> + /bin/echo '[07/20/20 09:24:11.04] - failover to 1.1.1.101 host. creating /home/postgres/databases/SECRET/trigger file.'
> + '[' 0 = 0 ']'
> + '[' 0 -eq 0 ']'
> + su postgres -c 'ssh -T postgres at 1.1.1.101 touch /home/postgres/databases/SECRET/trigger'
> 2020-07-20 09:24:11: pid 4262: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:11: pid 4262: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:11: pid 4078: LOG: received the failover command lock request from remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:11: pid 4078: LOG: remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101" is checking the status of [FAILOVER] lock for failover ID 3424
> 2020-07-20 09:24:11: pid 4078: LOG: FAILOVER lock is currently LOCKED
> 2020-07-20 09:24:11: pid 4078: LOG: received the failover command lock request from remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:11: pid 4078: LOG: remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101" is checking the status of [FAILOVER] lock for failover ID 3424
> 2020-07-20 09:24:11: pid 4078: LOG: FAILOVER lock is currently LOCKED
> + exit 0
> 2020-07-20 09:24:12: pid 4078: LOG: new IPC connection received
> 2020-07-20 09:24:12: pid 4078: LOG: received the failover command lock request from local pgpool-II on IPC interface
> 2020-07-20 09:24:12: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" is requesting to release [FAILOVER] lock for failover ID 3424
> 2020-07-20 09:24:12: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" has released the [FAILOVER] lock for failover ID 3424
> 2020-07-20 09:24:12: pid 4076: LOG: find_primary_node_repeatedly: waiting for finding a primary node
> 2020-07-20 09:24:12: pid 4076: LOG: find_primary_node: checking backend no 0
> 2020-07-20 09:24:12: pid 4076: LOG: find_primary_node: checking backend no 1
> 2020-07-20 09:24:12: pid 4262: ERROR: Failed to check replication time lag
> 2020-07-20 09:24:12: pid 4262: HINT: check sr_check_user and sr_check_password
> 2020-07-20 09:24:12: pid 4262: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:12: pid 4262: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:12: pid 4078: LOG: received the failover command lock request from remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:12: pid 4078: LOG: remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101" is checking the status of [FAILOVER] lock for failover ID 3424
> 2020-07-20 09:24:12: pid 4078: LOG: FAILOVER lock is currently FREE
> 2020-07-20 09:24:13: pid 4076: LOG: find_primary_node: checking backend no 0
> 2020-07-20 09:24:13: pid 4076: LOG: find_primary_node: checking backend no 1
> 2020-07-20 09:24:13: pid 4262: ERROR: Failed to check replication time lag
> 2020-07-20 09:24:13: pid 4262: HINT: check sr_check_user and sr_check_password
> 2020-07-20 09:24:13: pid 4262: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:13: pid 4262: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:14: pid 4076: LOG: find_primary_node: checking backend no 0
> 2020-07-20 09:24:14: pid 4076: LOG: find_primary_node: checking backend no 1
> 2020-07-20 09:24:14: pid 4262: ERROR: Failed to check replication time lag
> 2020-07-20 09:24:14: pid 4262: HINT: check sr_check_user and sr_check_password
> 2020-07-20 09:24:14: pid 4262: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:14: pid 4262: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:15: pid 4078: LOG: new IPC connection received
> 2020-07-20 09:24:15: pid 4078: LOG: received the failover command lock request from local pgpool-II on IPC interface
> 2020-07-20 09:24:15: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" is requesting to release [FOLLOW MASTER] lock for failover ID 3424
> 2020-07-20 09:24:15: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" has released the [FOLLOW MASTER] lock for failover ID 3424
> 2020-07-20 09:24:15: pid 4076: LOG: failover: set new primary node: -1
> 2020-07-20 09:24:15: pid 4076: LOG: failover: set new master node: 1
> 2020-07-20 09:24:15: pid 4262: ERROR: Failed to check replication time lag
> 2020-07-20 09:24:15: pid 4262: HINT: check sr_check_user and sr_check_password
> 2020-07-20 09:24:15: pid 4262: LOG: failed to connect to PostgreSQL server on "1.1.1.100:5432", getsockopt() detected error "Connection refused"
> 2020-07-20 09:24:15: pid 4262: ERROR: failed to make persistent db connection
> 2020-07-20 09:24:15: pid 4078: LOG: received the failover command lock request from remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101"
> 2020-07-20 09:24:15: pid 4078: LOG: remote pgpool-II node "1.1.1.101:9999 Linux mgrdb101" is checking the status of [FOLLOW MASTER] lock for failover ID 3424
> 2020-07-20 09:24:15: pid 4078: LOG: FOLLOW MASTER lock is currently FREE
> 2020-07-20 09:24:15: pid 4262: LOG: worker process received restart request
> 2020-07-20 09:24:15: pid 4078: LOG: new IPC connection received
> 2020-07-20 09:24:15: pid 4078: LOG: received the failover command lock request from local pgpool-II on IPC interface
> 2020-07-20 09:24:15: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" is requesting to resign from a lock holder for failover ID 3424
> 2020-07-20 09:24:15: pid 4078: LOG: local pgpool-II node "1.1.1.100:9999 Linux mgrdb100" has resigned from the lock holder
> failover done. shutdown host 1.1.1.100(5432)2020-07-20 09:24:15: pid 4076: LOG: failover done. shutdown host 1.1.1.100(5432)
> 2020-07-20 09:24:16: pid 4261: LOG: restart request received in pcp child process
> 2020-07-20 09:24:16: pid 4076: LOG: PCP child 4261 exits with status 0 in failover()
> 2020-07-20 09:24:16: pid 4076: LOG: fork a new PCP child pid 1144 in failover()
> 2020-07-20 09:24:16: pid 4076: LOG: pgpool-II successfully started. version 3.6.6 (subaruboshi)
>
> ----
> # ----------------------------
> # 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.
> #
>
> log_min_messages = DEBUG1
>
> #------------------------------------------------------------------------------
> # CONNECTIONS
> #------------------------------------------------------------------------------
>
> # - pgpool Connection Settings -
>
> listen_addresses='*'
> # Host name or IP address to listen on:
> # '*' for all, '' for no TCP/IP connections
> # (change requires restart)
> port=9999
> # 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=1
> # Set the backlog parameter of listen(2) to
> # num_init_children * listen_backlog_multiplier.
> # (change requires restart)
> serialize_accept=off
> # whether to serialize accept() call to avoid thundering herd problem
> # (change requires restart)
>
> # - pgpool Communication Manager Connection Settings -
>
> 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=9898
> # 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 -
>
> backend_hostname0='1.1.1.100'
> # Host name or IP address to connect to for backend 0
> backend_port0=5432
> # Port number for backend 0
> backend_weight0=1
> # Weight for backend 0 (only in load balancing mode)
> backend_data_directory0='/home/postgres/databases/SECRET'
> # Data directory for backend 0
> backend_flag0='ALLOW_TO_FAILOVER'
> # Controls various backend behavior
> # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
> #backend_hostname1 = 'host2'
> #backend_port1 = 5433
> #backend_weight1 = 1
> #backend_data_directory1 = '/data1'
> #backend_flag1 = 'ALLOW_TO_FAILOVER'
>
> # - Authentication -
>
> enable_pool_hba=on
> # Use pool_hba.conf for client authentication
> pool_passwd='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.
>
> # - SSL Connections -
>
> ssl=off
> # Enable SSL support
> # (change requires restart)
> #ssl_key = './server.key'
> # Path to the SSL private key file
> # (change requires restart)
> #ssl_cert = './server.cert'
> # Path to the SSL public certificate file
> # (change requires restart)
> #ssl_ca_cert = ''
> # Path to a single PEM format file
> # containing CA root certificate(s)
> # (change requires restart)
> #ssl_ca_cert_dir = ''
> # Directory containing CA root certificate(s)
> # (change requires restart)
>
>
> #------------------------------------------------------------------------------
> # POOLS
> #------------------------------------------------------------------------------
>
> # - Concurrent session and pool size -
>
> num_init_children=160
> # Number of concurrent sessions allowed
> # (change requires restart)
> max_pool=1
> # Number of connection pool caches per connection
> # (change requires restart)
>
> # - Life time -
>
> child_life_time=1
> # Pool exits after being idle for this many seconds
> child_max_connections=0
> # Pool exits after receiving that many connections
> # 0 means no exit
> connection_life_time=0
> # Connection to backend closes after being idle for this many seconds
> # 0 means no close
> client_idle_limit=0
> # 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='stderr'
> # 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=off
> # Log connections
> log_hostname=off
> # Hostname will be shown in ps status
> # and in logs if connections are logged
> log_statement=off
> # Log all statements
> log_per_node_statement=off
> # 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 -
>
> #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/pgpool.pid'
> # PID file name
> # Can be specified as relative to the"
> # location of pgpool.conf file or
> # as an absolute path
> # (change requires restart)
> logdir='/var/log'
> # 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'
>
>
> #------------------------------------------------------------------------------
> # REPLICATION MODE
> #------------------------------------------------------------------------------
>
> replication_mode=off
> # Activate replication mode
> # (change requires restart)
> replicate_select=off
> # Replicate SELECT statements
> # when in replication mode
> # replicate_select is higher priority than
> # load_balance_mode.
>
> insert_lock=off
> # 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=''
> # When rewriting lo_creat command in
> # replication mode, specify table name to
> # lock
>
> # - Degenerate handling -
>
> replication_stop_on_mismatch=off
> # 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=off
> # 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=off
> # Activate load balancing mode
> # (change requires restart)
> ignore_leading_white_space=on
> # Ignore leading white spaces of each query
> white_function_list=''
> # Comma separated list of function names
> # that don't write to database
> # Regexp are accepted
> black_function_list='currval,lastval,nextval,setval'
> # 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=off
> # 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=on
> # Activate master/slave mode
> # (change requires restart)
> master_slave_sub_mode='stream'
> # Master/slave sub mode
> # Valid values are combinations slony or
> # stream. Default is slony.
> # (change requires restart)
>
> # - Streaming -
>
> sr_check_period=1
> # Streaming replication check period
> # Disabled (0) by default
> sr_check_user='SECRET'
> # Streaming replication check user
> # This is necessary even if you disable
> # streaming replication delay check with
> # sr_check_period = 0
> sr_check_password='SECRET'
> # Password for streaming replication check user
> sr_check_database='postgres'
> # Database name for streaming replication check
> 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=1
> # Health check period
> # Disabled (0) by default
> health_check_timeout=0
> # Health check timeout
> # 0 means no timeout
> health_check_user='SECRET'
> # Health check user
> health_check_password='SECRET'
> # Password for health check user
> health_check_database=''
> # Database name for health check. If '', tries 'postgres' frist, then 'template1'
>
> 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='/etc/pgpool-II/recovery/failover.sh %d %P %H %R'
> # 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=on
> # 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=3
> # 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='SECRET'
> # Online recovery user
> recovery_password='SECRET'
> # Online recovery password
> recovery_1st_stage_command='recovery_1st_stage'
> # Executes a command in first stage
> recovery_2nd_stage_command=''
> # Executes a command in second stage
> recovery_timeout=90
> # Timeout in seconds to wait for the
> # recovering node's postmaster to start up
> # 0 means no wait
> client_idle_limit_in_recovery=0
> # 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=on
> # Activates watchdog
> # (change requires restart)
>
> # -Connection to up stream servers -
>
> 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='1.1.1.100'
> # Host name or IP address of this watchdog
> # (change requires restart)
> wd_port=9000
> # port number for watchdog service
> # (change requires restart)
> wd_priority=1
> # priority of this watchdog in leader election
> # (change requires restart)
>
> wd_authkey=''
> # Authentication key for watchdog communication
> # (change requires restart)
>
> wd_ipc_socket_dir='/var/run/postgresql'
> # Unix domain socket path for watchdog IPC socket
> # The Debian package defaults to
> # /var/run/postgresql
> # (change requires restart)
>
>
> # - Virtual IP control Setting -
>
> delegate_IP='10.65.181.99'
> # delegate IP address
> # If this is empty, virtual IP never bring up.
> # (change requires restart)
> if_cmd_path='/sbin'
> # path to the directory where if_up/down_cmd exists
> # (change requires restart)
> if_up_cmd='ifconfig eth0:pg inet $_IP_$ netmask 255.255.192.0 up'
> # startup delegate IP command
> # (change requires restart)
> if_down_cmd='ifconfig eth0:pg down'
> # shutdown delegate IP command
> # (change requires restart)
> arping_path='/usr/sbin'
> # arping command path
> # (change requires restart)
> arping_cmd='arping -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=''
> # Executes this command at escalation on new active pgpool.
> # (change requires restart)
> wd_de_escalation_command=''
> # Executes this command when master pgpool resigns from being master.
> # (change requires restart)
>
> # - Lifecheck Setting -
>
> # -- common --
>
> wd_monitoring_interfaces_list=''# Comma separated list of interfaces names to monitor.
> # if any interface from the list is active the watchdog will
> # consider the network is fine
> # 'any' to enable monitoring on all interfaces except loopback
> # '' to disable monitoring
>
>
> wd_lifecheck_method='heartbeat'
> # Method of watchdog lifecheck ('heartbeat' or 'query' or 'external')
> # (change requires restart)
> wd_interval=10
> # lifecheck interval (sec) > 0
> # (change requires restart)
>
> # -- heartbeat mode --
>
> wd_heartbeat_port=9694
> # Port number for receiving heartbeat signal
> # (change requires restart)
> wd_heartbeat_keepalive=2
> # Interval time of sending heartbeat signal (sec)
> # (change requires restart)
> wd_heartbeat_deadtime=30
> # Deadtime interval for heartbeat signal (sec)
> # (change requires restart)
> heartbeat_destination0='1.1.1.101'
> # Host name or IP address of destination 0
> # for sending heartbeat signal.
> # (change requires restart)
> heartbeat_destination_port0=9694
> # Port number of destination 0 for sending
> # heartbeat signal. Usually this is the
> # same as wd_heartbeat_port.
> # (change requires restart)
> heartbeat_device0='eth1'
> # 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)
>
> #heartbeat_destination1 = 'host0_ip2'
> #heartbeat_destination_port1 = 9694
> #heartbeat_device1 = ''
>
> # -- 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='SECRET'
> # watchdog user monitoring pgpools in lifecheck
> # (change requires restart)
> wd_lifecheck_password=''
> # Password for watchdog user in lifecheck
> # (change requires restart)
>
> # - Other pgpool Connection Settings -
>
> #other_pgpool_hostname0 = 'host0'
> # Host name or IP address to connect to for other pgpool 0
> # (change requires restart)
> #other_pgpool_port0 = 5432
> # Port number for othet pgpool 0
> # (change requires restart)
> #other_wd_port0 = 9000
> # Port number for othet watchdog 0
> # (change requires restart)
> #other_pgpool_hostname1 = 'host1'
> #other_pgpool_port1 = 5432
> #other_wd_port1 = 9000
>
>
> #------------------------------------------------------------------------------
> # OTHERS
> #------------------------------------------------------------------------------
> relcache_expire=0
> # 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=off
> # If on, use the memory cache functionality, off by default
> memqcache_method='shmem'
> # Cache storage method. either 'shmem'(shared memory) or
> # 'memcached'. 'shmem' by default
> # (change requires restart)
> memqcache_memcached_host='localhost'
> # Memcached host name or IP address. Mandatory if
> # memqcache_method = 'memcached'.
> # Defaults to localhost.
> # (change requires restart)
> memqcache_memcached_port=11211
> # 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=0
> # Memory cache entry life time specified in seconds.
> # 0 means infinite life time. 0 by default.
> # (change requires restart)
> memqcache_auto_cache_invalidation=on
> # 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=''
> backend_weight1=1
> backend_port1=5432
> other_wd_port0=9000
> backend_data_directory1='/home/postgres/databases/SECRET'
> other_pgpool_hostname0='1.1.1.101'
> other_pgpool_port0=9999
> backend_flag1='ALLOW_TO_FAILOVER'
> backend_hostname1='1.1.1.101'
> # Comma separated list of table names not to memcache
> # that don't write to database
> # Regexp are accepted
>
>
>
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