| -- |
| -- 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 tracer = require("skywalking.tracer") |
| local client = require("skywalking.client") |
| local Span = require('skywalking.span') |
| |
| local subsystem = ngx.config.subsystem |
| |
| local SkyWalkingHandler = { |
| PRIORITY = 100001, |
| VERSION = "0.0.1", |
| } |
| |
| function SkyWalkingHandler:init_worker() |
| require("skywalking.util").set_randomseed() |
| end |
| |
| function SkyWalkingHandler:access(config) |
| if subsystem == "stream" then |
| kong.log.warn("Not supportted to trace \"stream\" request yet.") |
| return |
| end |
| |
| if config.sample_ratio == 1 or math.random() * 100 < config.sample_ratio then |
| kong.ctx.plugin.skywalking_sample = true |
| |
| if not client:isInitialized() then |
| local metadata_buffer = ngx.shared.tracing_buffer |
| metadata_buffer:set('serviceName', config.service_name) |
| metadata_buffer:set('serviceInstanceName', config.service_instance_name) |
| metadata_buffer:set('includeHostInEntrySpan', config.include_host_in_entry_span) |
| |
| client:startBackendTimer(config.backend_http_uri) |
| end |
| |
| tracer:start(kong.request.get_forwarded_host()) |
| end |
| end |
| |
| function SkyWalkingHandler:body_filter(config) |
| if ngx.arg[2] and kong.ctx.plugin.skywalking_sample then |
| local entrySpan = ngx.ctx.entrySpan |
| Span.setComponentId(entrySpan, 6001) |
| Span.tag(entrySpan, 'kong.node', kong.node.get_hostname()) |
| |
| local service = kong.router.get_service() |
| if service and service.id then |
| Span.tag(entrySpan, 'kong.service', service.id) |
| local route = kong.router.get_route() |
| if route and route.id then |
| Span.tag(entrySpan, "kong.route", route.id) |
| end |
| if type(service.name) == "string" then |
| Span.tag(entrySpan, "kong.service_name", service.name) |
| end |
| end |
| Span.setComponentId(ngx.ctx.exitSpan, 6001) |
| |
| tracer:finish() |
| end |
| end |
| |
| function SkyWalkingHandler:log(config) |
| tracer:prepareForReport() |
| end |
| |
| return SkyWalkingHandler |