SkyWalking Nginx Agent provides the native tracing capability for Nginx powered by Nginx LUA module.
This agent follows the SkyWalking tracing and header protocol. It reports tracing data to SkyWalking APM through HTTP protocol. All HTTP 1.1 requests go through Nginx could be collected by this agent.
The following setup is targeting for OpenResty, if you want SkyWalking integrated Gateway, you could jump to
http { lua_package_path "/Path/to/.../skywalking-nginx-lua/lib/?.lua;;"; # Buffer represents the register inform and the queue of the finished segment lua_shared_dict tracing_buffer 100m; # Init is the timer setter and keeper # Setup an infinite loop timer to do register and trace report. init_worker_by_lua_block { local metadata_buffer = ngx.shared.tracing_buffer -- Set service name metadata_buffer:set('serviceName', 'User Service Name') -- Instance means the number of Nginx deployment, does not mean the worker instances metadata_buffer:set('serviceInstanceName', 'User Service Instance Name') -- type 'boolean', mark the entrySpan include host/domain metadata_buffer:set('includeHostInEntrySpan', false) -- set random seed require("skywalking.util").set_randomseed() require("skywalking.client"):startBackendTimer("http://127.0.0.1:8080") -- If there is a bug of this `tablepool` implementation, we can -- disable it in this way -- require("skywalking.util").disable_tablepool() skywalking_tracer = require("skywalking.tracer") } server { listen 8090; location /ingress { default_type text/html; rewrite_by_lua_block { ------------------------------------------------------ -- NOTICE, this should be changed manually -- This variable represents the upstream logic address -- Please set them as service logic name or DNS name -- -- Currently, we can not have the upstream real network address ------------------------------------------------------ skywalking_tracer:start("upstream service") -- If you want correlation custom data to the downstream service -- skywalking_tracer:start("upstream service", {custom = "custom_value"}) } -- Target upstream service proxy_pass http://127.0.0.1:8080/backend; body_filter_by_lua_block { if ngx.arg[2] then skywalking_tracer:finish() end } log_by_lua_block { skywalking_tracer:prepareForReport() } } } }
Please head to the releases page to download a release of Apache SkyWalking.
Require SkyWalking 8 OAP server
By using the /examples/nginx.conf, you could start the Nginx with LUA module or OpenResty. Such as nginx -c /path/to/skywalking-nginx-lua/examples/nginx.conf Then you could
instance properties update logs happens on the console log.2020/04/04 15:15:37 [debug] 12089#1446111: *4 [lua] content_by_lua(nginx.conf:175):4: Instance report request = {"service":"User Service Name","serviceInstance":"User Service Instance Name","properties":[{"language":"Lua"}]}
2020/04/04 15:15:37 [debug] 12089#1446111: *2 [lua] client.lua:89: reportServiceInstance(): Instance report response = {}
heartbeat logs happens after the register logs2020/04/04 15:15:40 [debug] 12089#1446111: *4 [lua] content_by_lua(nginx.conf:188):3: KeepAlive request = {"service":"User Service Name","serviceInstance":"User Service Instance Name"}
http://127.0.0.1:8080/ingress then you could see the tracing happens and reported spans in the logs.2020/04/04 15:15:46 [debug] 12089#1446111: *11 [lua] tracer.lua:83: prepareForReport(): segment = {"traceId":"1585984546953.410917649.45972","serviceInstance":"User Service Instance Name","spans":[{"operationName":"\/tier2\/lb","startTime":1585984546967,"endTime":1585984546968,"spanType":"Exit","spanId":1,"isError":false,"parentSpanId":0,"componentId":6000,"peer":"backend service","spanLayer":"Http"},{"operationName":"\/tier2\/lb","startTime":1585984546967,"tags":[{"key":"http.method","value":"GET"},{"key":"http.params","value":"http:\/\/127.0.0.1\/tier2\/lb"}],"endTime":1585984546968,"spanType":"Entry","spanId":0,"isError":false,"parentSpanId":-1,"componentId":6000,"refs":[{"traceId":"1585984546953.410917649.45972","networkAddressUsedAtPeer":"upstream service","parentEndpoint":"\/ingress","parentServiceInstance":"User Service Instance Name","parentSpanId":1,"parentService":"User Service Name","parentTraceSegmentId":"1585984546953.410917649.45972","refType":"CrossProcess"}],"spanLayer":"Http"}],"service":"User Service Name","traceSegmentId":"1585984546967.449397702.9959"}
2020/04/04 15:15:46 [debug] 12089#1446111: *11 [lua] tracer.lua:87: prepareForReport(): segment buffer size = 1
2020/04/04 15:15:46 [debug] 12089#1446111: *8 [lua] tracer.lua:83: prepareForReport(): segment = {"traceId":"1585984546953.410917649.45972","serviceInstance":"User Service Instance Name","spans":[{"operationName":"\/ingress","startTime":1585984546953,"endTime":1585984546968,"spanType":"Exit","spanId":1,"isError":false,"parentSpanId":0,"componentId":6000,"peer":"upstream service","spanLayer":"Http"},{"operationName":"\/ingress","startTime":1585984546953,"tags":[{"key":"http.method","value":"GET"},{"key":"http.params","value":"http:\/\/localhost\/ingress"}],"endTime":1585984546968,"spanType":"Entry","spanId":0,"parentSpanId":-1,"isError":false,"spanLayer":"Http","componentId":6000}],"service":"User Service Name","traceSegmentId":"1585984546953.410917649.45972"}
All codes in the lib/skywalking require the *_test.lua to do the UnitTest. To run that, you need to install
The following libs are required in runtime or test cases, please use LuaRocks to install them.
luarocks install lua-cjson 2.1.0-1)This LUA tracing lib is originally designed for Nginx+LUA/OpenResty ecosystems. But we write it to support more complex cases. If you just use this in the Ngnix, Setup Doc should be good enough. The following APIs are for developers or using this lib out of the Nginx case.
require("skywalking.client"):startBackendTimer("http://127.0.0.1:8080"). Start the backend timer. This timer register the metadata and report traces to the backend.require("skywalking.client"):destroyBackendTimer(). Stop the timer created by startBackendTimer, and clean unreported data.require("skywalking.tracer"):start("upstream service", correlation). Begin the tracing before the upstream begin. The custom data (table type) can be injected as the second parameter, and then they will be propagated to the downstream service.require("skywalking.tracer"):finish(). Finish the tracing for this HTTP request.require("skywalking.tracer"):prepareForReport(). Prepare the finished segment for further report.TracingContext is the entrance API for lua level tracing.
TracingContext.new(serviceId, serviceInstID), create an active tracing context.TracingContext.newNoOP(), create a no OP tracing context.TracingContext.drainAfterFinished(), fetch the segment includes all finished spans.Create 2 kinds of span
TracingContext.createEntrySpan(operationName, parent, contextCarrier)TracingContext.createExitSpan(operationName, parent, peer, contextCarrier)[NIGNX-LUA] as the issue title prefix.dev-subscribe@skywalking.apache.org, follow the reply to subscribe the mail list.skywalking channel at Apache Slack. If the link is not working, find the latest one at Apache INFRA WIKI.All committers should follow Release Guide to publish the official release.
Apache 2.0