Zabbix6.0 LTS distributed deployment Proxy

summary

Zabbix Proxy can replace Zabbix Server to collect performance and availability data of host devices, so as to reduce the pressure of Zabbix Server.

Zabbix Proxy can be used to:

Monitor remote location host equipment
Monitor the location of host and equipment with unreliable communication
Reduce the pressure on Zabbix Server in large-scale monitoring scenarios
Simplify the maintenance of distributed monitoring

All data collected by Zabbix Proxy is stored in the local database before being transferred to the server. In this way, data will not be lost due to any temporary communication problems with the server. The ProxyLocalBuffer and ProxyOfflineBuffer parameters in the agent configuration file control how long the data is saved locally.

The Proxy directly updates the latest configuration from the Zabbix Server database, which may be newer than the Zabbix Server, and the configuration of Zabbix Server cannot be updated quickly due to CacheUpdateFrequency. Therefore, the data collected and sent by Proxy to Zabbix Server may be ignored.

Zabbix Server cache update frequency, in seconds. Default 60

CacheUpdateFrequency=60

Force update zabbix_server cache

sudo zabbix_server  -R config_cache_reload

Ubuntu system optimization

Optimize the number of file openings and the maximum number of processes

egrep -v "*#|^$" /etc/security/limits.conf
*               soft      nofile          65536
*               hard      nofile          65536
*               soft      nproc           65536
*               hard      nproc           65536

Optimize the system switching partition, virtual memory, port, maximum listening queue, maximum number of files opened and other parameters

vim /etc/sysctl.conf
vm.swappiness = 0
vm.max_map_count = 262144
net.core.somaxconn = 65535
fs.file-max = 655360
net.ipv4.ip_forward = 1

Execute sysctl -p to optimize kernel parameters

#View the maximum number of open file descriptors
ulimit -n
#View the maximum number of processes available to the user
ulimit -u
#View VM Swappiness parameter
cat /proc/sys/vm/swappiness
#View VM max_ map_ Count parameter
sysctl -a|grep vm.max_map_count
#View net core. Somaxconn parameter
sysctl -a | grep net.core.somaxconn
#View FS File Max parameter
 cat /proc/sys/fs/file-nr

Restart the system

Installing the Zabbix repository

sudo wget https://repo.zabbix.com/zabbix/6.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_6.0-1+ubuntu20.04_all.deb

sudo dpkg -i zabbix-release_6.0-1+ubuntu20.04_all.deb

Update the list of available packages

sudo apt update

MySQL

Support character sets utf8 (utf8mb3) and utf8mb4 (using utf8_bin and utf8mb4_bin collation respectively) so that the Zabbix server / agent and MySQL database work normally. It is recommended to use utf8mb4 for new installation.

Install Mysql

sudo apt install -y mysql-server

For Ubuntu 20.04, the default repository MYSQL version is 8.0.28

Initialize database

sudo mysql_secure_installation

Step 1:

Press y|Y for Yes, any other key for No: N

Step 2: enter the mysql password you want to set twice

New password:

Re-enter new password:

Step 3: ask if you want to delete anonymous users?

Remove anonymous users? (press y|y for yes, any other key for no): N

Step 4: cancel the remote link?

Disallow root login remotely? (press y|y for yes, any other key for no): N (select N to allow root remote connection)

Step 5: delete the test database?

Remove test database and access to it? (press y|y for yes, any other key for no): N (select N, do not delete the test database)

Step 6: will the modified permission take effect immediately?

Reload privilege tables now? (press Y|y for yes, any other key for no): Y

When the following prompt appears, the setting is successful

Success.

All done!

Create and authorize zabbix libraries and users

#Login database
sudo mysql -uroot -p
#Create zabbix database
mysql> create database zabbix character set utf8mb4 collate utf8mb4_bin;
#Create zabbix user
mysql>  create user 'zabbix'@'%' identified by 'zabbix@zabbix';
#Authorize localhost access
mysql> grant all privileges on zabbix.* to 'zabbix'@'%';
#Refresh policy
flush privileges;
#sign out
mysql> quit;

mysql> create database zabbix character set utf8mb4 collate utf8mb4_bin;
Query OK, 1 row affected (0.01 sec)

mysql> create user 'zabbix'@'%' identified by 'zabbix@zabbix';
Query OK, 0 rows affected (0.03 sec)

mysql> grant all privileges on zabbix.* to 'zabbix'@'%';
Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> quit
Bye

MYSQL database version

ubuntu@zabbix-proxy01:~$ mysql  -V
mysql  Ver 8.0.28-0ubuntu0.20.04.3 for Linux on x86_64 ((Ubuntu))

Note: Zabbix Server and Zabbix Proxy cannot use the same database. If they are installed on the same host, the agent database must have a different name.

MYSQL 8.0 remote cannot connect

MYSQL can only log in locally, but cannot log in remotely. ss -ntl |grep -w 3306 view the database. The default listening address is 127.0.0.1.

Modify profile

/etc/mysql/mysql.conf.d/mysqld.cnf
bind-address = 0.0.0.0 
mysqlx-bind-address = 0.0.0.0

Restart database

sudo systemctl  restart   mysql

Install ZABBIX proxy

sudo apt install zabbix-proxy-mysql zabbix-sql-scripts

Optional

sudo apt install zabbix-get zabbix-sender zabbix-agent2

Import data

Import initial schema:

sudo cat /usr/share/doc/zabbix-sql-scripts/mysql/proxy.sql | mysql -uzabbix -p zabbix

Note: in the new version, the names of server and Proxy database initialization files are distinguished. Server is "server.sql", Proxy is "proxy.sql", and the same installation package named "ZABBIX SQL scripts" is used.

zabbix_proxy profile

ubuntu@zabbix-proxy01:/$ sudo  egrep -v  "*#|^$" /etc/zabbix/zabbix_proxy.conf 
Server=192.168.99.185;192.168.99.186
Hostname=Zabbixproxy01
LogFile=/var/log/zabbix/zabbix_proxy.log
LogFileSize=0
PidFile=/run/zabbix/zabbix_proxy.pid
SocketDir=/run/zabbix
DBHost=127.0.0.1
DBName=zabbix
DBUser=zabbix
DBPassword=zabbix@zabbix
ProxyOfflineBuffer=2
ConfigFrequency=120
DataSenderFrequency=2
StartPollers=30
StartPollersUnreachable=10
StartPingers=1
StartDiscoverers=1
SNMPTrapperFile=/var/log/snmptrap/snmptrap.log
CacheSize=512M
Timeout=4
FpingLocation=/usr/bin/fping
Fping6Location=/usr/bin/fping6
LogSlowQueries=3000
StatsAllowedIP=127.0.0.1

Start the Zabbix Proxy process

# systemctl restart zabbix-proxy
# systemctl enable zabbix-proxy

Introduction to some parameters of Zabbix Proxy

ConfigFrequency=60 #How often does the Zabbix Proxy get configuration data from the Zabbix Server 
DataSenderFrequency=2 #Frequency of Zabbix Proxy sending monitored data to Zabbix Server
ProxyOfflineBuffer=2   # When the Proxy or Server cannot be connected, the time to retain offline monitoring data, unit: hour
StartPollers=10 #Number of open multithreads
StartPollersUnreachable=1 #This thread is used to monitor the unconnected hosts separately
StartPingers=10 # Number of fping threads
CacheSize=64M #The number of caches used to save monitoring data is adjusted according to the number of monitoring hosts
Timeout=10 #The timeout time shall not exceed 30s, otherwise it will slow down the capture time of other monitoring data

Zabbix front end configuration

Manage → agent click → create agent

The Proxy name must be the same as the Hostname parameter in the configuration file

proxy pattern

Active - the Proxy will connect to the Zabbix server and request configuration data (default)

Passive - Zabbix server connected to Proxy

0 - proxy in the active mode

1 - proxy in the passive mode

Official documents

https://www.zabbix.com/documentation/6.0/en/manual/distributed_monitoring/proxies

Posted by Carolyn on Fri, 15 Apr 2022 10:11:19 +0930

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Zabbix6.0 LTS distributed deployment Proxy

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