membphis commented on a change in pull request #2339: URL: https://github.com/apache/apisix/pull/2339#discussion_r497253268
########## File path: apisix/plugins/api-breaker.lua ########## @@ -0,0 +1,208 @@ +-- +-- 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 plugin_name = "api-breaker" +local ngx = ngx +local math = math +local ipairs = ipairs +local error = error +local core = require("apisix.core") + +local DEFAULT_EXPTIME = 600 + +local shared_buffer = ngx.shared['plugin-'.. plugin_name] +if not shared_buffer then + error("get ngx.shared dict error.") +end + + +local schema = { + type = "object", + properties = { + unhealthy_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 = {"unhealthy_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 = 1005, + 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, err = shared_buffer:get(unhealthy_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + local unhealthy_lastime, err = shared_buffer:get(unhealthy_lastime_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + 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 >= ngx.time() then + return conf.unhealthy_response_code + end + end +end + + +function _M.header_filter(conf, ctx) + local unhealthy_status = conf.unhealthy.http_statuses + local healthy_status = conf.healthy.http_statuses + + local unhealthy_key = unhealthy_cache_key(ctx) + local healthy_key = healthy_cache_key(ctx) + + local upstream_statu = core.response.get_upstream_status(ctx) + + if is_unhealthy(unhealthy_status, upstream_statu) then + local newval, err = shared_buffer:incr(unhealthy_key, 1, 0, DEFAULT_EXPTIME) + if err then + core.log.error("ngx.shared incr error", err) + end + shared_buffer:expire(unhealthy_key, DEFAULT_EXPTIME) + shared_buffer:delete(healthy_key) -- del healthy numeration + + if 0 == newval % conf.unhealthy.failures then + shared_buffer:set(unhealthy_lastime_cache_key(ctx), os.time(), DEFAULT_EXPTIME) Review comment: !PLEASE! we need to avoid `os.*`, we should use `ngx.*` always ########## File path: t/APISIX.pm ########## @@ -260,6 +261,17 @@ _EOC_ require("apisix").http_init_worker() } + # only for test Review comment: you can add new function in `t/lib/server.lua`, it is enough for testing ########## File path: apisix/plugins/api-breaker.lua ########## @@ -0,0 +1,208 @@ +-- +-- 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 plugin_name = "api-breaker" +local ngx = ngx +local math = math +local ipairs = ipairs +local error = error +local core = require("apisix.core") + +local DEFAULT_EXPTIME = 600 + +local shared_buffer = ngx.shared['plugin-'.. plugin_name] +if not shared_buffer then + error("get ngx.shared dict error.") +end + + +local schema = { + type = "object", + properties = { + unhealthy_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 = {"unhealthy_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 = 1005, + 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, err = shared_buffer:get(unhealthy_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + local unhealthy_lastime, err = shared_buffer:get(unhealthy_lastime_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + 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 >= ngx.time() then + return conf.unhealthy_response_code + end + end +end + + +function _M.header_filter(conf, ctx) + local unhealthy_status = conf.unhealthy.http_statuses + local healthy_status = conf.healthy.http_statuses + + local unhealthy_key = unhealthy_cache_key(ctx) + local healthy_key = healthy_cache_key(ctx) + + local upstream_statu = core.response.get_upstream_status(ctx) + + if is_unhealthy(unhealthy_status, upstream_statu) then + local newval, err = shared_buffer:incr(unhealthy_key, 1, 0, DEFAULT_EXPTIME) + if err then + core.log.error("ngx.shared incr error", err) + end + shared_buffer:expire(unhealthy_key, DEFAULT_EXPTIME) + shared_buffer:delete(healthy_key) -- del healthy numeration + + if 0 == newval % conf.unhealthy.failures then + shared_buffer:set(unhealthy_lastime_cache_key(ctx), os.time(), DEFAULT_EXPTIME) + core.log.info(unhealthy_key, " ", newval) -- stat change + end + + elseif is_healthy(healthy_status, upstream_statu) then + local unhealthy_val, err = shared_buffer:get(unhealthy_key) + if err then + core.log.error("ngx.shared incr error", err) Review comment: do we need to return `500` here? ########## File path: apisix/plugins/api-breaker.lua ########## @@ -0,0 +1,208 @@ +-- +-- 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 plugin_name = "api-breaker" +local ngx = ngx +local math = math +local ipairs = ipairs +local error = error +local core = require("apisix.core") + +local DEFAULT_EXPTIME = 600 + +local shared_buffer = ngx.shared['plugin-'.. plugin_name] +if not shared_buffer then + error("get ngx.shared dict error.") +end + + +local schema = { + type = "object", + properties = { + unhealthy_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 = {"unhealthy_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 = 1005, + 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, err = shared_buffer:get(unhealthy_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + local unhealthy_lastime, err = shared_buffer:get(unhealthy_lastime_cache_key(ctx)) + if err then + core.log.error("ngx.shared get error", err) + end + + 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 >= ngx.time() then + return conf.unhealthy_response_code + end + end +end + + +function _M.header_filter(conf, ctx) + local unhealthy_status = conf.unhealthy.http_statuses + local healthy_status = conf.healthy.http_statuses + + local unhealthy_key = unhealthy_cache_key(ctx) + local healthy_key = healthy_cache_key(ctx) + + local upstream_statu = core.response.get_upstream_status(ctx) + + if is_unhealthy(unhealthy_status, upstream_statu) then + local newval, err = shared_buffer:incr(unhealthy_key, 1, 0, DEFAULT_EXPTIME) + if err then + core.log.error("ngx.shared incr error", err) + end + shared_buffer:expire(unhealthy_key, DEFAULT_EXPTIME) + shared_buffer:delete(healthy_key) -- del healthy numeration + + if 0 == newval % conf.unhealthy.failures then + shared_buffer:set(unhealthy_lastime_cache_key(ctx), os.time(), DEFAULT_EXPTIME) + core.log.info(unhealthy_key, " ", newval) -- stat change + end + + elseif is_healthy(healthy_status, upstream_statu) then + local unhealthy_val, err = shared_buffer:get(unhealthy_key) + if err then + core.log.error("ngx.shared incr error", err) Review comment: bad description ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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