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Merge pull request #13049 from overleaf/jpa-free-sockets-monitoring

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[metrics] add monitoring for free sockets

GitOrigin-RevId: b3d6cb7a4857fdbe1ba27f2ea85912b04129944d
This commit is contained in:
Jakob Ackermann 2023-05-22 11:36:42 +01:00 committed by Copybot
parent 4d433e4f5a
commit 7432904d0a
1 changed files with 31 additions and 4 deletions
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35
libraries/metrics/open_sockets.js
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@ -16,12 +16,16 @@ require('https').globalAgent.maxSockets = Infinity
const SOCKETS_HTTP = require('http').globalAgent.sockets
const SOCKETS_HTTPS = require('https').globalAgent.sockets
const FREE_SOCKETS_HTTP = require('http').globalAgent.freeSockets
const FREE_SOCKETS_HTTPS = require('https').globalAgent.freeSockets
// keep track of set gauges and reset them in the next collection cycle
const SEEN_HOSTS_HTTP = new Set()
const SEEN_HOSTS_HTTPS = new Set()
const FREE_SEEN_HOSTS_HTTP = new Set()
const FREE_SEEN_HOSTS_HTTPS = new Set()
function collectOpenConnections(sockets, seenHosts, prefix) {
function collectConnectionsCount(sockets, seenHosts, status, https) {
const Metrics = require('./index')
Object.keys(sockets).forEach(host => seenHosts.add(host))
seenHosts.forEach(host => {
@ -31,7 +35,18 @@ function collectOpenConnections(sockets, seenHosts, prefix) {
if (!openConnections) {
seenHosts.delete(host)
}
Metrics.gauge(`open_connections.${prefix}.${hostname}`, openConnections)
Metrics.gauge('sockets', openConnections, 1, {
path: hostname,
method: https,
status,
})
if (status === 'open') {
// Emit legacy metric to keep old time series intact.
Metrics.gauge(
`${status}_connections.${https}.${hostname}`,
openConnections
)
}
})
}
@ -46,7 +61,19 @@ module.exports = OpenSocketsMonitor = {
},
gaugeOpenSockets() {
collectOpenConnections(SOCKETS_HTTP, SEEN_HOSTS_HTTP, 'http')
collectOpenConnections(SOCKETS_HTTPS, SEEN_HOSTS_HTTPS, 'https')
collectConnectionsCount(SOCKETS_HTTP, SEEN_HOSTS_HTTP, 'open', 'http')
collectConnectionsCount(SOCKETS_HTTPS, SEEN_HOSTS_HTTPS, 'open', 'https')
collectConnectionsCount(
FREE_SOCKETS_HTTP,
FREE_SEEN_HOSTS_HTTP,
'free',
'http'
)
collectConnectionsCount(
FREE_SOCKETS_HTTPS,
FREE_SEEN_HOSTS_HTTPS,
'free',
'https'
)
},
}