[Pgpool-general] can't connect to pgpool
Tatsuo Ishii
ishii at sraoss.co.jp
Fri Sep 26 01:08:58 UTC 2008
Use ' instead of ". i.e.
backend_hostname0 = "db1" <-- no good
backend_hostname0 = 'db1' <-- good
--
Tatsuo Ishii
SRA OSS, Inc. Japan
> Hi.
>
>
> I have 3 machines. 1 is the pgpool controller, the other are 2 postgres
> nodes. I have a postgres user named "pooler" on both machines, with db
> creation priviledges and no password. I am unable to successfully create
> a database while running pgpool-II in replication/loadbalanced mode.
> The error I'm giving is:
>
> ##
> [root at localhost ~]# createdb -h localhost -p 9999 -U postgres
> --owner=pooler bench_replication
> createdb: could not connect to database postgres: server closed the
> connection unexpectedly
> This probably means the server terminated abnormally
> before or while processing the request.
> ##
>
> While running the daemon in debug node, the following is spitted out to
> the screen when the attempt is made:
>
> 2008-09-25 19:38:57 DEBUG: pid 4846: I am PCP 4846
> 2008-09-25 19:39:12 DEBUG: pid 4820: I am 4820 accept fd 0
> 2008-09-25 19:39:12 LOG: pid 4820: connection received: host=127.0.0.1
> port=33725
> 2008-09-25 19:39:12 DEBUG: pid 4820: Protocol Major: 1234 Minor: 5679
> database: user:
> 2008-09-25 19:39:12 DEBUG: pid 4820: SSLRequest: sent N; retry startup
> 2008-09-25 19:39:12 DEBUG: pid 4820: Protocol Major: 3 Minor: 0
> database: postgres user: postgres
> 2008-09-25 19:39:12 DEBUG: pid 4820: new_connection: connecting 0 backend
> 2008-09-25 19:39:12 ERROR: pid 4820: connect_inet_domain_socket:
> gethostbyname() failed: Success host: "
> 2008-09-25 19:39:12 ERROR: pid 4820: connection to "(5432) failed
> 2008-09-25 19:39:12 ERROR: pid 4820: new_connection: create_cp() failed
> 2008-09-25 19:39:12 LOG: pid 4820: notice_backend_error: 0 fail over
> request from pid 4820
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler called
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: starting to
> select new master node
> 2008-09-25 19:39:12 LOG: pid 4813: starting degeneration. shutdown
> host "(5432)
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4814
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4815
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4816
> 2008-09-25 19:39:12 DEBUG: pid 4814: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4817
> 2008-09-25 19:39:12 DEBUG: pid 4816: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4815: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4817: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4818
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4819
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4820
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4821
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4822
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4823
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4824
> 2008-09-25 19:39:12 DEBUG: pid 4822: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4825
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4826
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4827
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4828
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4829
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4830
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4831
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4832
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4833
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4834
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4835
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4836
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4837
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4838
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4839
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4840
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4841
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4842
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4843
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4844
> 2008-09-25 19:39:12 DEBUG: pid 4813: failover_handler: kill 4845
> 2008-09-25 19:39:12 LOG: pid 4813: failover_handler: set new master
> node: 1
> 2008-09-25 19:39:12 DEBUG: pid 4819: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4824: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4820: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4845: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4833: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4826: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4840: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4831: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4821: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4850: I am 4850
> 2008-09-25 19:39:12 DEBUG: pid 4843: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4848: I am 4848
> 2008-09-25 19:39:12 DEBUG: pid 4835: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4851: I am 4851
> 2008-09-25 19:39:12 DEBUG: pid 4844: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4830: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4825: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4828: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4852: I am 4852
> 2008-09-25 19:39:12 DEBUG: pid 4841: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4832: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4836: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4829: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4853: I am 4853
> 2008-09-25 19:39:12 DEBUG: pid 4842: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4827: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4837: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4854: I am 4854
> 2008-09-25 19:39:12 DEBUG: pid 4839: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4838: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4818: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4849: I am 4849
> 2008-09-25 19:39:12 DEBUG: pid 4834: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4823: child receives shutdown request
> signal 3
> 2008-09-25 19:39:12 DEBUG: pid 4855: I am 4855
> 2008-09-25 19:39:12 DEBUG: pid 4856: I am 4856
> 2008-09-25 19:39:12 DEBUG: pid 4857: I am 4857
> 2008-09-25 19:39:12 DEBUG: pid 4858: I am 4858
> 2008-09-25 19:39:12 DEBUG: pid 4859: I am 4859
> 2008-09-25 19:39:12 DEBUG: pid 4861: I am 4861
> 2008-09-25 19:39:12 DEBUG: pid 4860: I am 4860
> 2008-09-25 19:39:12 DEBUG: pid 4862: I am 4862
> 2008-09-25 19:39:12 DEBUG: pid 4863: I am 4863
> 2008-09-25 19:39:12 DEBUG: pid 4864: I am 4864
> 2008-09-25 19:39:12 DEBUG: pid 4865: I am 4865
> 2008-09-25 19:39:12 DEBUG: pid 4867: I am 4867
> 2008-09-25 19:39:12 DEBUG: pid 4866: I am 4866
> 2008-09-25 19:39:12 DEBUG: pid 4869: I am 4869
> 2008-09-25 19:39:12 DEBUG: pid 4868: I am 4868
> 2008-09-25 19:39:12 DEBUG: pid 4870: I am 4870
> 2008-09-25 19:39:12 DEBUG: pid 4871: I am 4871
> 2008-09-25 19:39:12 DEBUG: pid 4872: I am 4872
> 2008-09-25 19:39:12 DEBUG: pid 4874: I am 4874
> 2008-09-25 19:39:12 DEBUG: pid 4873: I am 4873
> 2008-09-25 19:39:12 DEBUG: pid 4875: I am 4875
> 2008-09-25 19:39:12 DEBUG: pid 4877: I am 4877
> 2008-09-25 19:39:12 DEBUG: pid 4878: I am 4878
> 2008-09-25 19:39:12 LOG: pid 4813: failover done. shutdown host "(5432)
> 2008-09-25 19:39:12 DEBUG: pid 4813: reap_handler called
> 2008-09-25 19:39:12 DEBUG: pid 4813: reap_handler: call wait3
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4814 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4815 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4816 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4817 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4818 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4819 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4820 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4821 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4822 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4823 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4824 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4825 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4826 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4827 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4828 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4879: I am 4879
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4829 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4830 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4831 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4832 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4833 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4834 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4835 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4836 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4837 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4838 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4839 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4840 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4841 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4842 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4843 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4844 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: child 4845 exits with status 0 by
> signal 0
> 2008-09-25 19:39:12 DEBUG: pid 4813: reap_handler: normally exited
> 2008-09-25 19:39:12 DEBUG: pid 4876: I am 4876
>
>
>
> #####
>
> The same error is displayed even with a simple connect to localhost -P 9999.
>
> I am able to connect to the other nodes with the psql command without
> any problems, but for debugging sake, here's my pg_hba.conf for my db1 &
> db2 machines:
>
> ###
>
> # "local" is for Unix domain socket connections only
> local all all ident sameuser
> # IPv4 local connections:
> host all all 127.0.0.1/32 ident sameuser
>
> host all pooler 10.1.1.88/32 trust
>
>
> # IPv6 local connections:
> host all all ::1/128 trust
>
> ####
>
>
> A copy of my /etc/pgpool.conf:
>
> #
> # pgpool-II configuration file sample
> # $Header: /cvsroot/pgpool/pgpool-II/pgpool.conf.sample,v 1.21
> 2008/03/18 08:39:02 y-asaba Exp $
>
> # Host name or IP address to listen on: '*' for all, '' for no TCP/IP
> # connections
> listen_addresses = '*'
>
> # Port number for pgpool
> port = 9999
>
> # Port number for pgpool communication manager
> pcp_port = 9898
>
> # Unix domain socket path.
> socket_dir = '/tmp'
>
> # Unix domain socket path for pgpool communication manager.
> pcp_socket_dir = '/tmp/'
>
> # Unix domain socket path for the backend.
> backend_socket_dir = '/tmp/'
>
> # pgpool communication manager timeout. 0 means no timeout, but strongly
> not recommended!
> pcp_timeout = 10
>
> # number of pre-forked child process
> num_init_children = 32
>
> # Number of connection pools allowed for a child process
> max_pool = 4
>
> # If idle for this many seconds, child exits. 0 means no timeout.
> child_life_time = 300
>
> # If idle for this many seconds, connection to PostgreSQL closes.
> # 0 means no timeout.
> connection_life_time = 0
>
> # If child_max_connections connections were received, child exits.
> # 0 means no exit.
> child_max_connections = 0
>
> # If client_idle_limit is n (n > 0), the client is forced to be
> # disconnected whenever after n seconds idle (even inside an explicit
> # transactions!)
> # 0 means no disconnect.
> client_idle_limit = 0
>
> # Maximum time in seconds to complete client authentication.
> # 0 means no timeout.
> authentication_timeout = 60
>
> # Logging directory
> logdir = '/var/run'
>
> # Replication mode
> replication_mode = true
>
> # Load balancing mode, i.e., all SELECTs are load balanced.
> # This is ignored if replication_mode is false.
> load_balance_mode = true
>
> # if there's a data mismatch between master and secondary
> # start degeneration to stop replication mode
> replication_stop_on_mismatch = false
>
> # If true, replicate SELECT statement when load balancing is disabled.
> # If false, it is only sent to the master node.
> replicate_select = false
>
> # Semicolon separated list of queries to be issued at the end of a session
> reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
>
> # If true print timestamp on each log line.
> print_timestamp = true
>
> # If true, operate in master/slave mode.
> master_slave_mode = false
>
> # If true, cache connection pool.
> connection_cache = true
>
> # Health check timeout. 0 means no timeout.
> health_check_timeout = 20
>
> # Health check period. 0 means no health check.
> health_check_period = 0
>
> # Health check user
> health_check_user = 'nobody'
>
> # Execute command by failover.
> # special values: %d = node id
> # %h = host name
> # %p = port number
> # %D = database cluster path
> # %m = new master node id
> # %M = old master node id
> # %% = '%' character
> #
> failover_command = ''
>
> # Execute command by failback.
> # special values: %d = node id
> # %h = host name
> # %p = port number
> # %D = database cluster path
> # %m = new master node id
> # %M = old master node id
> # %% = '%' character
> #
> failback_command = ''
>
> # If true, automatically lock table with INSERT statements to keep SERIAL
> # data consistency. An /*INSERT LOCK*/ comment has the same effect. A
> # /NO INSERT LOCK*/ comment disables the effect.
> insert_lock = false
>
> # If true, ignore leading white spaces of each query while pgpool judges
> # whether the query is a SELECT so that it can be load balanced. This
> # is useful for certain APIs such as DBI/DBD which is known to adding an
> # extra leading white space.
> ignore_leading_white_space = true
>
> # If true, print all statements to the log. Like the log_statement option
> # to PostgreSQL, this allows for observing queries without engaging in full
> # debugging.
> log_statement = true
>
> # If true, incoming connections will be printed to the log.
> log_connections = true
>
> # If true, hostname will be shown in ps status. Also shown in
> # connection log if log_connections = true.
> # Be warned that this feature will add overhead to look up hostname.
> log_hostname = false
>
> # if non 0, run in parallel query mode
> parallel_mode = false
>
> # if non 0, use query cache
> enable_query_cache = false
>
> #set pgpool2 hostname
> pgpool2_hostname = 'pgpool-ctrl'
>
> # system DB info
> system_db_hostname = 'localhost'
> system_db_port = 5432
> system_db_dbname = 'pgpool'
> system_db_schema = 'pgpool_catalog'
> system_db_user = 'pgpool'
> system_db_password = ''
>
> # backend_hostname, backend_port, backend_weight
> # here are examples
> #backend_hostname0 = 'host1'
> #backend_port0 = 5432
> #backend_weight0 = 1
> #backend_data_directory0 = '/data'
> #backend_hostname1 = 'host2'
> #backend_port1 = 5433
> #backend_weight1 = 1
> #backend_data_directory1 = '/data1'
>
>
> backend_hostname0 = "db1"
> backend_port0 = 5432
> backend_weight0 = 1
>
> backend_hostname1 = "db2"
> backend_port1 = 5432
> backend_weight1 = 1
>
> # - HBA -
>
> # If true, use pool_hba.conf for client authentication. In pgpool-II
> # 1.1, the default value is false. The default value will be true in
> # 1.2.
> enable_pool_hba = true
>
> # - online recovery -
> # online recovery user
> recovery_user = 'nobody'
>
> # online recovery password
> recovery_password = ''
>
> # execute a command in first stage.
> recovery_1st_stage_command = ''
>
> # execute a command in second stage.
> recovery_2nd_stage_command = ''
>
> # maximum time in seconds to wait for remote start-up. 0 means no wait
> recovery_timeout = 90
>
> #####
>
> and my /etc/pcp.conf:
>
>
> # USERID:MD5PASSWD
>
> postgres:e8a48653851e28c69d0506508fb27fc5
>
> #
>
>
> My host and IP information :
>
> pgpool-ctrl = 10.1.1.88
> db1 = 10.1.1.87
> db2 = 10.1.1.102
>
> my /etc/pool_hba.conf:
>
>
> # TYPE DATABASE USER CIDR-ADDRESS METHOD
>
> # "local" is for Unix domain socket connections only
> local all all trust
> # IPv4 local connections:
> host all all 127.0.0.1/32 trust
>
>
> I can't figure out what the problem is -- the tutorial only gives
> examples with using localhost, so it's not very helpful. The connection
> logs on db1 and db2 show nothing even making an attempt to connect, so
> it looks like it's not getting passed pgpool-ctrl. tcpdump shows no
> connection attempts from pgpool-ctrol to db1 or db2 either. I don't
> need to load pgpool on all the nodes do I? I'm at a loss, any help is
> greatly appreciated!
>
> Thanks,
>
> James
>
>
>
>
>
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