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implement nginx-like logic to avoid hitting upstream when it's down

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This commit is contained in:
Alex Kocharin 2014-03-08 03:54:28 +00:00
parent 6b9001ef6c
commit f1ec18dc4b
1 changed files with 15 additions and 13 deletions
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28
lib/up-storage.js
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@ -15,7 +15,7 @@ var URL = require('url')
function Storage(config, mainconfig) {
if (!(this instanceof Storage)) return new Storage(config)
this.config = config
this.is_alive = true
this.failed_requests = 0
this.userAgent = mainconfig.user_agent
this.ca = config.ca
this.logger = Logger.logger.child({sub: 'out'})
@ -178,22 +178,24 @@ Storage.prototype.request = function(options, cb) {
Storage.prototype.status_check = function(alive) {
if (arguments.length === 0) {
return true // hold off this feature until v0.6.0
/* if (!this.is_alive && Math.abs(Date.now() - this.is_alive_time) < 2*60*1000) {
if (this.failed_requests >= this.max_fails && Math.abs(Date.now() - this.last_request_time) < this.fail_timeout) {
return false
} else {
return true
}*/
} else {
if (this.is_alive && !alive) {
this.logger.warn({host: this.url.host}, 'host @{host} is now offline')
} else if (!this.is_alive && alive) {
this.logger.info({host: this.url.host}, 'host @{host} is back online')
}
this.is_alive = alive
this.is_alive_time = Date.now()
} else {
if (alive) {
if (this.failed_requests >= this.max_fails) {
this.logger.warn({host: this.url.host}, 'host @{host} is back online')
}
this.failed_requests = 0
} else {
this.failed_requests++
if (this.failed_requests === this.max_fails) {
this.logger.warn({host: this.url.host}, 'host @{host} is now offline')
}
}
this.last_request_time = Date.now()
}
}