membphis commented on a change in pull request #2339: URL: https://github.com/apache/apisix/pull/2339#discussion_r496351550
########## File path: apisix/plugins/api-breaker.lua ########## @@ -0,0 +1,180 @@ +-- +-- Licensed to the Apache Software Foundation (ASF) under one or more +-- contributor license agreements. See the NOTICE file distributed with +-- this work for additional information regarding copyright ownership. +-- The ASF licenses this file to You under the Apache License, Version 2.0 +-- (the "License"); you may not use this file except in compliance with +-- the License. You may obtain a copy of the License at +-- +-- http://www.apache.org/licenses/LICENSE-2.0 +-- +-- Unless required by applicable law or agreed to in writing, software +-- distributed under the License is distributed on an "AS IS" BASIS, +-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +-- See the License for the specific language governing permissions and +-- limitations under the License. +-- +local ngx = ngx +local math = math +local os = os +local ipairs = ipairs +local core = require("apisix.core") +local plugin_name = "api-breaker" + +local shared_buffer = ngx.shared['plugin-'.. plugin_name] + +local schema = { + type = "object", + properties = { + response_code = { + type = "integer", + minimum = 200, + maximum = 599, + }, + unhealthy = { + type = "object", + http_statuses = { + type = "array", + minItems = 1, + items = { + type = "integer", + minimum = 500, + maximum = 599, + }, + uniqueItems = true, + default = {500} + }, + failures = { + type = "integer", + minimum = 1, + default = 1, + }, + }, + healthy = { + type = "object", + http_statuses = { + type = "array", + minItems = 1, + items = { + type = "integer", + minimum = 200, + maximum = 499, + }, + uniqueItems = true, + default = {200, 206} + }, + successes = { + type = "integer", + minimum = 1, + default = 1, + } + } + }, + required = {"response_code", "unhealthy", "healthy"}, +} + +local function is_unhealthy(unhealthy_status, upstream_statu) + for _, unhealthy in ipairs(unhealthy_status) do + if unhealthy == upstream_statu then + return true + end + end + + return false +end + + +local function is_healthy(healthy_status, upstream_statu) + for _, healthy in ipairs(healthy_status) do + if healthy == upstream_statu then + return true + end + end + + return false +end + + +local function healthy_cache_key(ctx) + return "healthy-" .. core.request.get_host(ctx) .. ctx.var.uri +end + + +local function unhealthy_cache_key(ctx) + return "unhealthy-" .. core.request.get_host(ctx) .. ctx.var.uri +end + + +local function unhealthy_lastime_cache_key(ctx) + return "unhealthy-lastime" .. core.request.get_host(ctx) .. ctx.var.uri +end + + +local _M = { + version = 0.1, + name = plugin_name, + priority = 1000, + schema = schema, +} + + +function _M.check_schema(conf) + local ok, err = core.schema.check(schema, conf) + if not ok then + return false, err + end + + return true +end + + +function _M.access(conf, ctx) + local unhealthy_val, _ = shared_buffer:get(unhealthy_cache_key(ctx)) + local unhealthy_lastime, _ = shared_buffer:get(unhealthy_lastime_cache_key(ctx)) + + if unhealthy_val and unhealthy_lastime then + local ride = math.ceil(unhealthy_val / conf.unhealthy.failures) + if ride < 1 then + ride = 1 + end + + if unhealthy_lastime + 2^ride >= os.time() then Review comment: `os.time()` is slow. `ngx.time()` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
