Pg全面监控脚本--check_postgres
一、简介
check_postgres is a script for monitoring various attributes of your database. It is designed to work with Nagios, MRTG, or in standalone scripts.
二、安装
2.1 编译安装
[root@check_postgres ~]# tar -zxvf check_postgres-2.21.0.tar.gz [root@check_postgres ~]# cd check_postgres-2.21.0 [root@check_postgres check_postgres-2.21.0]# perl Makefile.PL Configuring check_postgres 2.21.0 Checking if your kit is complete... Looks good Writing Makefile for check_postgres [root@check_postgres check_postgres-2.21.0]# make cp check_postgres.pl blib/script/check_postgres.pl /usr/bin/perl -MExtUtils::MY -e 'MY->fixin(shift)' -- blib/script/check_postgres.pl Manifying blib/man1/check_postgres.1p [root@check_postgres check_postgres-2.21.0]# make install Installing /usr/local/share/man/man1/check_postgres.1p Installing /usr/local/bin/check_postgres.pl Appending installation info to /usr/lib64/perl5/perllocal.pod
2.2 生成链接
[root@check_postgres ~]# mkdir -p /opt/check_postgres/bin [root@check_postgres ~]# chown postgres:postgres /opt/check_postgres/ -R [root@check_postgres ~]# su - postgres [postgres@check_postgres ~]$ cd /opt/check_postgres/bin/ [postgres@check_postgres bin]$ check_postgres.pl --symlinks [postgres@check_postgres bin]$ ls check_postgres_archive_ready check_postgres_hitratio check_postgres_pgagent_jobs check_postgres_replicate_row check_postgres_autovac_freeze check_postgres_hot_standby_delay check_postgres_pgbouncer_backends check_postgres_same_schema check_postgres_backends check_postgres_index_size check_postgres_pgbouncer_checksum check_postgres_sequence check_postgres_bloat check_postgres_last_analyze check_postgres_pgb_pool_cl_active check_postgres_settings_checksum check_postgres_checkpoint check_postgres_last_autoanalyze check_postgres_pgb_pool_cl_waiting check_postgres_slony_status check_postgres_cluster_id check_postgres_last_autovacuum check_postgres_pgb_pool_maxwait check_postgres_table_size check_postgres_commitratio check_postgres_last_vacuum check_postgres_pgb_pool_sv_active check_postgres_timesync check_postgres_connection check_postgres_listener check_postgres_pgb_pool_sv_idle check_postgres_txn_idle check_postgres_custom_query check_postgres_locks check_postgres_pgb_pool_sv_login check_postgres_txn_time check_postgres_database_size check_postgres_logfile check_postgres_pgb_pool_sv_tested check_postgres_txn_wraparound check_postgres_dbstats check_postgres_new_version_bc check_postgres_pgb_pool_sv_used check_postgres_version check_postgres_disabled_triggers check_postgres_new_version_box check_postgres_prepared_txns check_postgres_wal_files check_postgres_disk_space check_postgres_new_version_cp check_postgres_query_runtime check_postgres_fsm_pages check_postgres_new_version_pg check_postgres_query_time check_postgres_fsm_relations check_postgres_new_version_tnm check_postgres_relation_size
修改环境变量（加入命令路径）：
export PATH=/opt/check_postgres/bin:/opt/pg93/bin:$PATH:$HOME/bin export PGDATA=/opt/pg93/data export LD_LIBRARY_PATH=/opt/pg93/lib:$LD_LIBRARY_PATH
使修改生效：
[postgres@check_postgres ~]$ source .bash_profile
三、检查涉及的方面
check_postgres涉及方面比较广泛，不仅有常规方面检查，同时也涉及一些主流工具的检查，如：pgbouncer、pgAgent、slony、bucardo等。 archive_ready - Check the number of WAL files ready in the pg_xlog/archive_status autovac_freeze - Checks how close databases are to autovacuum_freeze_max_age. backends - Number of connections, compared to max_connections. bloat - Check for table and index bloat. checkpoint - Checks how long since the last checkpoint cluster_id - Checks the Database System Identifier commitratio - Report if the commit ratio of a database is too low. connection - Simple connection check. custom_query - Run a custom query. database_size - Report if a database is too big. dbstats - Returns stats from pg_stat_database: Cacti output only disabled_triggers - Check if any triggers are disabled disk_space - Checks space of local disks Postgres is using. fsm_pages - Checks percentage of pages used in free space map. fsm_relations - Checks percentage of relations used in free space map. hitratio - Report if the hit ratio of a database is too low. hot_standby_delay - Check the replication delay in hot standby setup index_size - Checks the size of indexes only. last_analyze - Check the maximum time in seconds since any one table has been analyzed. last_autoanalyze - Check the maximum time in seconds since any one table has been autoanalyzed. last_autovacuum - Check the maximum time in seconds since any one table has been autovacuumed. last_vacuum - Check the maximum time in seconds since any one table has been vacuumed. listener - Checks for specific listeners. locks - Checks the number of locks. logfile - Checks that the logfile is being written to correctly. new_version_bc - Checks if a newer version of Bucardo is available. new_version_box - Checks if a newer version of boxinfo is available. new_version_cp - Checks if a newer version of check_postgres.pl is available. new_version_pg - Checks if a newer version of Postgres is available. new_version_tnm - Checks if a newer version of tail_n_mail is available. pgagent_jobs - Check for no failed pgAgent jobs within a specified period of time. pgb_pool_cl_active - Check the number of active clients in each pgbouncer pool. pgb_pool_cl_waiting - Check the number of waiting clients in each pgbouncer pool. pgb_pool_maxwait - Check the current maximum wait time for client connections in pgbouncer pools. pgb_pool_sv_active - Check the number of active server connections in each pgbouncer pool. pgb_pool_sv_idle - Check the number of idle server connections in each pgbouncer pool. pgb_pool_sv_login - Check the number of login server connections in each pgbouncer pool. pgb_pool_sv_tested - Check the number of tested server connections in each pgbouncer pool. pgb_pool_sv_used - Check the number of used server connections in each pgbouncer pool. pgbouncer_backends - Check how many clients are connected to pgbouncer compared to max_client_conn. pgbouncer_checksum - Check that no pgbouncer settings have changed since the last check. prepared_txns - Checks number and age of prepared transactions. query_runtime - Check how long a specific query takes to run. query_time - Checks the maximum running time of current queries. relation_size - Checks the size of tables and indexes. replicate_row - Verify a simple update gets replicated to another server. same_schema - Verify that two databases have the exact same tables, columns, etc. sequence - Checks remaining calls left in sequences. settings_checksum - Check that no settings have changed since the last check. slony_status - Ensure Slony is up to date via sl_status. table_size - Checks the size of tables only. timesync - Compare database time to local system time. txn_idle - Checks the maximum "idle in transaction" time. txn_time - Checks the maximum open transaction time. txn_wraparound - See how close databases are getting to transaction ID wraparound. version - Check for proper Postgres version. wal_files - Check the number of WAL files in the pg_xlog directory
四、工具使用
参阅 http://bucardo.org/check_postgres/check_postgres.pl.html
五、问题
Q1
错误：
[postgres@check_postgres ~]$ check_postgres_connection -db postgres Cannot find Time::HiRes, needed if 'showtime' is true at /opt/check_postgres/bin/check_postgres_connection line 1267.
解决办法：
[root@check_postgres ~]# yum install perl-Time-HiRes