A small go program to check the health of TNT nodes
Must have zabbix-agent installed on the node server. Connect to this server and go to the $HOME folder. The following steps must be done for each node server seperately.
Clone the github repository
git clone https://github.com/SomniaStellarum/TNTNodeChecker.git $HOME/go/src/github.com/SomniaStellarum/TNTNodeChecker
Edit the /etc/zabbix/zabbix_agentd.conf file. Recommend
sudo vim /etc/zabbix/zabbix_agentd.conf
Add the zabbix server to the config file. This is the IP to allow incoming requests from. Good practice to only set Server and HostName once in configuration file.
Server=127.0.0.1,UserSpecifiedIP
Set AllowRoot=1. Will likely have to uncomment from default.
Add UserParameter. This is the script that will be called to check on the health of the TNT Node.
UserParameter=healthcheck,HOME/go/src/github.com/SomniaStellarum/TNTNodeChecker/nodeCheck.sh HOME TNT_Address
Note: HOME and TNT_Address should be replaced here with the actual values here. HOME is the path the the Home folder and TNT_Address is the ethereum address used for the node (holding the TNT balance).
Next we need to configure the zabbix server so that we can collect the data. The easiest way to do this is through a template. Create a template and add an initial item (called _hc). This is the main item that will collect the data, so set the collection period (eg 1m). This should be a type Zabbix Agent. The key should be healthcheck, which will collect the json data from the node checker to be parsed by dependent variables. Recommended history storage is 0 or 3600 (for debugging).
Next, add each of the following dependent variables. There should be a preprocessing step for each (type JSONPath)
BalanceTNT, key: healthcheck.tnt, type: Text, PreProc Param: $.tnt
ConsecutiveFail, key: healthcheck.cfail, type: Numeric (unsigned), PreProc Param: $.cfail
ConsecutivePass, key: healthcheck.cpass, type: Numeric (unsigned), PreProc Param: $.cpass
Fail, key: healthcheck.fail, type: Numeric (unsigned), PreProc Param: $.fail
FailPercent, key: healthcheck.failper, type: Numeric (float), PreProc Param: $.failper
Pass, key: healthcheck.pass, type: Numeric (unsigned), PreProc Param: $.pass
Finally, add the hosts (ensure the correct IP) and apply the template.