阿里云centos7监控postgres9.6.6

1. 安装libzbxpgsql

下载地址https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7.5-x86_64/

安装libzbxpgsql

wget https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7.5-x86_64/pgdg-centos96-9.6-3.noarch.rpm
rpm -ivh pgdg-centos96-9.6-3.noarch.rpm#安装依赖
yum -y install postgresql95-libs  # 已经安装可忽略
yum -y install postgresql-libs
yum -y install libconfig
[root@localhost packages]# find / -name libzbxpgsql.so
[root@localhost packages]# rpm -ivh --force libzbxpgsql-1.1.0-1.el6.x86_64.rpm --nodeps
[root@localhost ~]# find / -name libzbxpgsql.so
/usr/lib64/zabbix/modules/libzbxpgsql.so
/usr/local/zabbix/lib/libzbxpgsql.so
[root@localhost ~]# ln -s /usr/lib64/zabbix/modules/libzbxpgsql.so /usr/local/zabbix/lib/

配置zabbix配置文件zabbix_agentd.conf

LoadModulePath=/usr/local/zabbix/lib/
LoadModule==libzbxpgsql.so

3. 创建监控用户

创建一个用户，开放你所要监控的数据库只读权限给它，为了安全，把权限做到最小化。
我用的pgpool-II。

psql -h 10.1.0.115 -U postgres -p9999
Password for user postgres:
psql (9.5.6)
Type "help" for help.postgres=# CREATE ROLE monitoring WITH LOGIN NOSUPERUSER NOCREATEDB NOCREATEROLE;
CREATE ROLE
postgres=# GRANT CONNECT ON DATABASE wiseucmsg TO monitoring;
GRANT
postgres=# alter user monitoring with password 'password';
ALTER ROLE

使用创建的用户能登录查看相应数据库，则可进行下一步。

[postgres@localhost ~]$ psql  -U monitoring -p 5432 wiseucmsg
Password for user monitoring:
psql (9.6.15)
Type "help" for help.wiseucmsg=> \lList of databasesName    |   Owner   | Encoding |   Collate   |    Ctype    |    Access privileges
-----------+-----------+----------+-------------+-------------+-------------------------postdb1   | postuser1 | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =Tc/postuser1          +|           |          |             |             | postuser1=CTc/postuser1postgres  | postgres  | UTF8     | en_US.UTF-8 | en_US.UTF-8 | template0 | postgres  | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres            +|           |          |             |             | postgres=CTc/postgrestemplate1 | postgres  | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres            +|           |          |             |             | postgres=CTc/postgreswang      | wang      | UTF8     | en_US.UTF-8 | en_US.UTF-8 | wiseucmsg | postgres  | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =Tc/postgres           +|           |          |             |             | postgres=CTc/postgres  +|           |          |             |             | monitoring=c/postgreszabbix    | zabbix    | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
(7 rows)wiseucmsg=>

postgres模板下载地址： http://pg-monz.github.io/pg_monz/index-en.html
4. 导入监控模板

wget https://codeload.github.com/pg-monz/pg_monz/tar.gz/2.2
[root@localhost ~]# cd pg_monz-2.2
[root@localhost ~/pg_monz-2.2]# ls
LICENSE  pg_monz  quick-install.txt  README-en.md  README.md
[root@localhost ~/pg_monz-2.2]# cd pg_monz
[root@localhost ~/pg_monz-2.2/pg_monz]# ls
template  usr-local-bin  usr-local-etc  zabbix_agentd.d
[root@localhost ~/pg_monz-2.2/pg_monz]# cd template
[root@localhost ~/pg_monz-2.2/pg_monz/template]# ls
Template_App_pgpool-II-36.xml        Template_App_pgpool-II.xml              Template_App_PostgreSQL_SR.xml
Template_App_pgpool-II_watchdog.xml  Template_App_PostgreSQL_SR_Cluster.xml  Template_App_PostgreSQL.xml
[root@localhost ~/pg_monz-2.2/pg_monz/template]# sz Template_App_PostgreSQL.xml

模板在Github上有：
https://github.com/cavaliercoder/libzbxpgsql/tree/master/templates
链接：https://pan.baidu.com/s/16226FZ4UZjsSWqoazrzdNQ
提取码：cyol

{$PG_CONN} => host=localhost port=54321 user=monitoring connect_timeout=10

{$PG_DB} => wiseucmsg

创建postgres图形

Zabbix 通过shell脚本监控PostgreSQL

授权：

CREATE ROLE zabbix WITH LOGIN NOSUPERUSER NOCREATEDB NOCREATEROLE;GRANT CONNECT ON DATABASE test TO zabbix;alter user zabbix with password 'zabbix';

zabbix客户端配置文件，添加监控项

[root@localhost zabbix]# vim /etc/zabbix/zabbix_agentd.conf
[root@localhost zabbix]# systemctl restart zabbix-agentUserParameter=pg_chk[*],/etc/zabbix/chk_pg.sh $1 $2[root@localhost zabbix]# more chk_pg.sh

#shell 参数说明：

$1—>‘totalsize’)
$2—>数据库名

#!/bin/bash
# by dwh 2018.6.21
case $1 in
'totalsize')
psql -h localhost -U zabbix -p 5432 test -t -c "select sum(pg_database_size(datid)) as total_size from pg_stat_database"
;;'db_cache')
db_ca=`psql -h localhost -U zabbix -p 5432 test -t -c "select cast(blks_hit/(blks_read+blks_hit+0.000001)*100.0 as numeric(5,2)) as cache from pg_stat_database where datname
= '$2'"`
if [[ "$db_ca" == 0 ]];then
echo 0
else
echo $db_ca
fi
;;'db_success')
db_su=`psql -h localhost -U zabbix -p 5432 test -t -c "select cast(xact_commit/(xact_rollback+xact_commit+0.000001)*100.0 as numeric(5,2)) as success from pg_stat_database w
here datname = '$2'"`
if [[ "$db_su" == 0 ]];then
echo 0
else
echo $db_su
fi
;;'server_processes')
server_p=`psql -h localhost -U zabbix -p 5432 test -t -c "select sum(numbackends) from pg_stat_database"`
if [[ $server_p -eq 0 ]];then
echo 0
else
echo $server_p
fi
;;'tx_commited')
tx_c=`psql -h localhost -U zabbix -p 5432 test -t -c "select sum(xact_commit) from pg_stat_database"`
if [[ $tx_c -eq 0 ]];then
echo 0
else
echo $tx_c
fi
;;'tx_rolledback')
tx_r=`psql -h localhost -U zabbix -p 5432 test -t -c "select sum(xact_rollback) from pg_stat_database"`
if [[ $tx_r -eq 0 ]];then
echo 0
else
echo $tx_r
fi
;;'db_size')
db_s=`psql -h localhost -U zabbix -p 5432 test -t -c "select pg_database_size('$2')"` #as size"
if [[ $db_s -eq 0 ]];then
echo 0
else
echo $db_s
fi
;;'db_connections')
db_c=`psql -h localhost -U zabbix -p 5432 test -t -c "select numbackends from pg_stat_database where datname = '$2'"`
if [[ $db_c -eq 0 ]];then
echo 0
else
echo $db_c
fi
;;'db_returned')
db_r=`psql -h localhost -U zabbix -p 5432 test -t -c "select tup_returned from pg_stat_database where datname = '$2'"`
if [[ $db_r -eq 0 ]];then
echo 0
else
echo $db_r
fi
;;'db_fetched')
db_f=`psql -h localhost -U zabbix -p 5432 test -t -c "select tup_fetched from pg_stat_database where datname = '$2'"`
if [[ $db_f -eq 0 ]];then
echo 0
else
echo $db_f
fi
;;'db_inserted')
db_i=`psql -h localhost -U zabbix -p 5432 test -t -c "select tup_inserted from pg_stat_database where datname = '$2'"`
if [[ $db_i -eq 0 ]];then
echo 0
else
echo $db_i
fi
;;'db_updated')
db_u=`psql -h localhost -U zabbix -p 5432 test -t -c "select tup_updated from pg_stat_database where datname = '$2'"`
if [[ $db_u -eq 0 ]];then
echo 0
else
echo $db_u
fi
;;'db_deleted')
db_d=`psql -h localhost -U zabbix -p 5432 test -t -c "select tup_deleted from pg_stat_database where datname = '$2'"`
if [[ $db_d -eq 0 ]];then
echo 0
else
echo $db_d
fi
;;'db_commited')
db_co=`psql -h localhost -U zabbix -p 5432 test -t -c "select xact_commit from pg_stat_database where datname = '$2'"`
if [[ $db_co -eq 0 ]];then
echo 0
else
echo $db_co
fi
;;'db_rolled')
db_ro=`psql -h localhost -U zabbix -p 5432 test -t -c "select xact_rollback from pg_stat_database where datname = '$2'"`
if [[ $db_ro -eq 0 ]];then
echo 0
else
echo $db_ro
fi
;;'version')
# psql -h localhost -U zabbix -p 5432 test -t -c "select version()"
psql --version|head -n1 |awk -F " " '{print $3}'
;;
esac

Zabbix监控TCP连接状态

获取tcp连接数的两种方法：

netstat -n | awk '/^tcp/ {++state[$NF]} END {for(key in state) print key,state[key]}'
ss -ant | awk 'NR>1 {++s[$1]} END {for(k in s) print k,s[k]}'

规范脚本存放目录：

mkdir /etc/zabbix/scripts

1.编写监控tcp连接数的shell脚本，并添加执行权限

# cat /etc/zabbix/scripts/tcp_status.sh
#!/bin/bash
#
[ $# -ne 1 ] && echo "Usage:CLOSE-WAIT|CLOSED|CLOSING|ESTAB|FIN-WAIT-1|FIN-WAIT-2|LAST-ACK|LISTEN|SYN-RECV SYN-SENT|TIME-WAIT" && exit 1
tcp_status_fun(){TCP_STAT=$1#netstat -n | awk '/^tcp/ {++state[$NF]} END {for(key in state) print key,state[key]}' > /tmp/netstat.tmpss -ant | awk 'NR>1 {++s[$1]} END {for(k in s) print k,s[k]}' > /tmp/ss.tmpTCP_STAT_VALUE=$(grep "$TCP_STAT" /tmp/ss.tmp | cut -d ' ' -f2)if [ -z $TCP_STAT_VALUE ];thenTCP_STAT_VALUE=0fiecho $TCP_STAT_VALUE
}
tcp_status_fun $1添加执行权限：
chmod +x tcp_status.sh

2.创建一个自定义的key：

# cat /etc/zabbix/zabbix_agentd.d/tcp.conf
UserParameter=tcp_status[*],/bin/bash /etc/zabbix/scripts/tcp_status.sh "$1"

3.重启zabbix-agent,修改配置文件必须重启

systemctl restart  zabbix-agent

4.服务端使用Zabbix_get测试是否能正常获取值

zabbix_get -s 127.0.0.1 -k tcp_status[ESTAB]

5.web界面，导入tcp模板，创建主机并关联tcp模板

参考链接：
https://www.baidu.com/link?url=Io9LLb-Fveobb7aWkvES-Tm3eY-rc9V5TxJ3zdn0qZMnwt6V7l2d_C3AbJTnizMFSIQuulwQWyaLpUNSfLYtEa&wd=&eqid=856621ed000502de000000065ddc9c7c
zabbix监控nginx ：https://www.cnblogs.com/lovelinux199075/p/8990538.html