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glass-isc-dhcp
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Critical/Warning shared network utilization alerting implementation

This commit is contained in:
Akkadius 2017-09-06 03:50:11 -05:00
parent 9cb1cde275
commit f43616c86b
2 changed files with 90 additions and 6 deletions
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86
app.js
View File

@ -378,4 +378,88 @@ alert_check_timer = setInterval(function(){
slack_message(":white_check_mark: CLEAR: DHCP leases per minute have returned to above the critical threshold (" + glass_config.leases_per_minute_threshold.toLocaleString('en') + ") Current LP/s (" + leases_per_minute.toLocaleString('en') + ")");
}
}
}, (60 * 1000));
}, (60 * 1000));
alert_status_networks_warning = [];
alert_status_networks_critical = [];
alert_subnet_check_timer = setInterval(function(){
console.log("[Timer] Alert Timer check - subnets");
if(glass_config.shared_network_warning_threshold > 0 || glass_config.shared_network_critical_threshold > 0) {
const execSync = require('child_process').execSync;
output = execSync('./bin/dhcpd-pools -c ' + glass_config.config_file + ' -l ' + glass_config.leases_file + ' -f j -A -s e');
var dhcp_data = JSON.parse(output);
/*
* Iterate through Shared Networks
*/
for ( var i = 0; i < dhcp_data['shared-networks'].length; i++) {
utilization = round(parseFloat(dhcp_data['shared-networks'][i].used / dhcp_data['shared-networks'][i].defined) * 100, 2);
if(isNaN(utilization))
utilization = 0;
/* Initialize these array buckets */
if(typeof alert_status_networks_warning[dhcp_data['shared-networks'][i].location] === "undefined")
alert_status_networks_warning[dhcp_data['shared-networks'][i].location] = 0;
if(typeof alert_status_networks_critical[dhcp_data['shared-networks'][i].location] === "undefined")
alert_status_networks_critical[dhcp_data['shared-networks'][i].location] = 0;
console.log("Location: %s", dhcp_data['shared-networks'][i].location);
console.log("Used: %s", dhcp_data['shared-networks'][i].used.toLocaleString('en'));
console.log("Defined: %s", dhcp_data['shared-networks'][i].defined.toLocaleString('en'));
console.log("Free: %s", dhcp_data['shared-networks'][i].free.toLocaleString('en'));
console.log("Utilization: %s", utilization);
console.log(" \n");
/* Check Warnings */
if(glass_config.shared_network_warning_threshold > 0) {
if (
utilization >= glass_config.shared_network_warning_threshold &&
utilization <= glass_config.shared_network_critical_threshold &&
alert_status_networks_warning[dhcp_data['shared-networks'][i].location] == 0
)
{
alert_status_networks_warning[dhcp_data['shared-networks'][i].location] = 1;
slack_message(":warning: WARNING: DHCP shared network utilization (" + dhcp_data['shared-networks'][i].location + ") Current: (" + utilization + ") Threshold: (" + glass_config.shared_network_warning_threshold + ")");
}
else if (
utilization <= glass_config.shared_network_warning_threshold &&
alert_status_networks_warning[dhcp_data['shared-networks'][i].location] == 1
)
{
alert_status_networks_warning[dhcp_data['shared-networks'][i].location] = 0;
slack_message(":white_check_mark: CLEAR: Warning DHCP shared network utilization (" + dhcp_data['shared-networks'][i].location + ") Current: (" + utilization + ") Threshold: (" + glass_config.shared_network_warning_threshold + ")");
}
}
/* Check Critical */
if(glass_config.shared_network_critical_threshold > 0) {
if (
utilization >= glass_config.shared_network_critical_threshold &&
alert_status_networks_critical[dhcp_data['shared-networks'][i].location] == 0
)
{
alert_status_networks_critical[dhcp_data['shared-networks'][i].location] = 1;
slack_message(":fire: CRITICAL: DHCP shared network utilization (" + dhcp_data['shared-networks'][i].location + ") Current: (" + utilization + ") Threshold: (" + glass_config.shared_network_critical_threshold + ")");
}
else if (
utilization <= glass_config.shared_network_critical_threshold &&
alert_status_networks_critical[dhcp_data['shared-networks'][i].location] == 1
)
{
alert_status_networks_critical[dhcp_data['shared-networks'][i].location] = 0;
slack_message(":white_check_mark: CLEAR: Critical DHCP shared network utilization (" + dhcp_data['shared-networks'][i].location + ") Current: (" + utilization + ") Threshold: (" + glass_config.shared_network_critical_threshold + ")");
}
}
}
}
}, (5 * 1000));
function round(num, places) {
var multiplier = Math.pow(10, places);
return Math.round(num * multiplier) / multiplier;
}

10
config/glass_config.json
View File

@ -4,9 +4,9 @@
"leases_file": "/var/lib/dhcp/dhcpd.leases",
"log_file": "/var/log/dhcp.log",
"config_file": "/etc/dhcp/dhcpd.conf",
"shared_network_critical_threshold": 95,
"shared_network_warning_threshold": 80,
"leases_per_minute_threshold": 0,
"slack_webhook_url": "",
"slack_alert_channel": ""
"shared_network_critical_threshold": "95",
"shared_network_warning_threshold": "80",
"slack_webhook_url": "https://hooks.slack.com/services/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",
"slack_alert_channel": "#alerting",
"leases_per_minute_threshold": "1000"
}