| .. | ||
| dns_availability_by_zabbix_agent.yaml | ||
| README.md | ||
DNS availability by Zabbix agent
Overview
This template is designed for dns availability monitoring by Zabbix agent via host/posh and doesn't require any external scripts.
Requirements
- Zabbix version: 6.0 and higher.
Define user parameters.
Tested versions
This template has been tested on:
Macros used
| Name | Description | Default |
|---|---|---|
| {$REQUEST} | address to check availability | google.com |
| {$RESOLVER1} | dns to check availability | ns3-l2.nic.ru |
| {$RESOLVER2} | dns to check availability | ns4-l2.nic.ru |
| {$RESOLVER3} | dns to check availability | ns8-l2.nic.ru |
| {$RESOLVER4} | dns to check availability | ns4-cloud.nic.ru |
| {$RESOLVER5} | dns to check availability | ns8-cloud.nic.ru |
Items
| Name | Description | Type | Key and additional info |
|---|---|---|---|
| DNS request | Address for resolve | Calculated | 'dns.request' |
| DNS resolver 1 address | Resolver address | Calculated | 'dns.resolver1.address' |
| DNS resolver 1 available | Availability of address | Zabbix agent | 'dns.resolver1.available[{$REQUEST},{$RESOLVER1}]' |
| DNS resolver 2 address | Resolver address | Calculated | 'dns.resolver2.address' |
| DNS resolver 2 available | Availability of address | Zabbix agent | 'dns.resolver2.available[{$REQUEST},{$RESOLVER2}]' |
| DNS resolver 3 address | Resolver address | Calculated | 'dns.resolver3.address' |
| DNS resolver 3 available | Availability of address | Zabbix agent | 'dns.resolver3.available[{$REQUEST},{$RESOLVER3}]' |
| DNS resolver 4 address | Resolver address | Calculated | 'dns.resolver4.address' |
| DNS resolver 4 available | Availability of address | Zabbix agent | 'dns.resolver4.available[{$REQUEST},{$RESOLVER4}]' |
| DNS resolver 5 address | Resolver address | Calculated | 'dns.resolver5.address' |
| DNS resolver 5 available | Availability of address | Zabbix agent | 'dns.resolver5.available[{$REQUEST},{$RESOLVER5}]' |
Triggers
| Name | Description | Expression | Severity | Dependencies and additional info |
|---|---|---|---|---|
| {ITEM.VALUE1} not resolved by any DNS | length(last(/DNS availability by Zabbix agent/dns.request))>0 and last(/DNS availability by Zabbix agent/dns.resolver1.available[{$REQUEST},{$RESOLVER1}],#1)<>1 and last(/DNS availability by Zabbix agent/dns.resolver2.available[{$REQUEST},{$RESOLVER2}],#1)<>1 and last(/DNS availability by Zabbix agent/dns.resolver3.available[{$REQUEST},{$RESOLVER3}],#1)<>1 and last(/DNS availability by Zabbix agent/dns.resolver4.available[{$REQUEST},{$RESOLVER4}],#1)<>1 and last(/DNS availability by Zabbix agent/dns.resolver5.available[{$REQUEST},{$RESOLVER5}],#1)<>1 | High | Manual close: No | |
| {ITEM.VALUE1} not resolved by {ITEM.VALUE2} | length(last(/DNS availability by Zabbix agent/dns.request))>0 and length(last(/DNS availability by Zabbix agent/dns.resolver1.address))>0 and last(/DNS availability by Zabbix agent/dns.resolver1.available[{$REQUEST},{$RESOLVER1}],#1)<>1 | Average | Manual close: No | |
| {ITEM.VALUE1} not resolved by {ITEM.VALUE2} | length(last(/DNS availability by Zabbix agent/dns.request))>0 and length(last(/DNS availability by Zabbix agent/dns.resolver2.address))>0 and last(/DNS availability by Zabbix agent/dns.resolver2.available[{$REQUEST},{$RESOLVER2}],#1)<>1 | Average | Manual close: No | |
| {ITEM.VALUE1} not resolved by {ITEM.VALUE2} | length(last(/DNS availability by Zabbix agent/dns.request))>0 and length(last(/DNS availability by Zabbix agent/dns.resolver3.address))>0 and last(/DNS availability by Zabbix agent/dns.resolver3.available[{$REQUEST},{$RESOLVER3}],#1)<>1 | Average | Manual close: No | |
| {ITEM.VALUE1} not resolved by {ITEM.VALUE2} | length(last(/DNS availability by Zabbix agent/dns.request))>0 and length(last(/DNS availability by Zabbix agent/dns.resolver4.address))>0 and last(/DNS availability by Zabbix agent/dns.resolver4.available[{$REQUEST},{$RESOLVER4}],#1)<>1 | Average | Manual close: No | |
| {ITEM.VALUE1} not resolved by {ITEM.VALUE2} | length(last(/DNS availability by Zabbix agent/dns.request))>0 and length(last(/DNS availability by Zabbix agent/dns.resolver5.address))>0 and last(/DNS availability by Zabbix agent/dns.resolver5.available[{$REQUEST},{$RESOLVER5}],#1)<>1 | Average | Manual close: No |
Discovery rules
There are no discovery rules in this template.
Item prototypes for Clients discovery
There are no item prototypes in this template.
Define user parameters
for Linux:
tee -a /etc/zabbix/zabbix_agentd.conf > /dev/null <<'EOF'
Timeout=30
UserParameter=dns.resolver1.available[*], host $1 $2 >> /dev/null && echo 1 || echo 0
UserParameter=dns.resolver2.available[*], host $1 $2 >> /dev/null && echo 1 || echo 0
UserParameter=dns.resolver3.available[*], host $1 $2 >> /dev/null && echo 1 || echo 0
UserParameter=dns.resolver4.available[*], host $1 $2 >> /dev/null && echo 1 || echo 0
UserParameter=dns.resolver5.available[*], host $1 $2 >> /dev/null && echo 1 || echo 0
EOF
systemctl restart zabbix-agent
for Windows:
powershell.exe
$text = @"
Timeout=30
UserParameter=dns.resolver1.available[*], powershell.exe -Command "if (Resolve-DnsName -Name $1 -Type A -Server $2 -ErrorAction SilentlyContinue) {return '1'}; return '0'"
UserParameter=dns.resolver2.available[*], powershell.exe -Command "if (Resolve-DnsName -Name $1 -Type A -Server $2 -ErrorAction SilentlyContinue) {return '1'}; return '0'"
UserParameter=dns.resolver3.available[*], powershell.exe -Command "if (Resolve-DnsName -Name $1 -Type A -Server $2 -ErrorAction SilentlyContinue) {return '1'}; return '0'"
UserParameter=dns.resolver4.available[*], powershell.exe -Command "if (Resolve-DnsName -Name $1 -Type A -Server $2 -ErrorAction SilentlyContinue) {return '1'}; return '0'"
UserParameter=dns.resolver5.available[*], powershell.exe -Command "if (Resolve-DnsName -Name $1 -Type A -Server $2 -ErrorAction SilentlyContinue) {return '1'}; return '0'"
"@
$text | Out-File -Append "$env:ProgramFiles\Zabbix Agent\zabbix_agentd.conf" -Encoding "UTF8"
exit
sc stop "Zabbix Agent" && sc start "Zabbix Agent"