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skywalking.md

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skywalking

Summary

Name

Skywalking uses its native Nginx LUA tracer to provide tracing, topology analysis, and metrics from service and URI perspective. The skywalking server can supports both http and grpc protocols. The APISIX client only support http protocols.

Attributes

Name Type Requirement Default Valid Description
sample_ratio number required 1 [0.00001, 1] the ratio of sample

How To Enable

First of all, enable the skyWalking plugin in the config.yaml:

# Add this in config.yaml
plugins:
  - ... # plugin you need
  - skywalking

Then reload APISIX, a background timer will be created to report data to skywalking server.

Here's an example, enable the skywalking plugin on the specified route:

curl http://127.0.0.1:9080/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["GET"],
    "uris": [
        "/uid/*"
    ],
    "plugins": {
        "skywalking": {
            "sample_ratio": 1
        }
    },
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "10.110.149.175:8089": 1
        }
    }
}'

You also can complete the above operation through the web interface, first add a route, then add skywalking plugin:

How to set endpoint

We can set the endpoint by specified the configuration in conf/config.yaml.

Name Type Default Description
service_name string "APISIX" service name for skywalking reporter
service_instance_name string "APISIX Instance Name" service instance name for skywalking reporter， set it to $hostname to get local hostname directly.
endpoint_addr string "http://127.0.0.1:12800" the http endpoint of Skywalking, for example: http://127.0.0.1:12800
report_interval integer use the value in the skywalking client library the report interval, in seconds

Here is an example:

plugin_attr:
  skywalking:
    service_name: APISIX
    service_instance_name: "APISIX Instance Name"
    endpoint_addr: http://127.0.0.1:12800

Test Plugin

Run Skywalking Example

e.g.

  1. Run Skywalking Server:

    • By default, use H2 storage, start skywalking directly

      sudo docker run --name skywalking -d -p 1234:1234 -p 11800:11800 -p 12800:12800 --restart always apache/skywalking-oap-server:8.3.0-es6

    • Of Course, you can use Elasticsearch storage

      1. Firstly, you should install Elasticsearch:

        sudo docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 --restart always -e "discovery.type=single-node" elasticsearch:6.7.2

      2. You can install ElasticSearch management page: elasticsearch-hq(Optional)

        sudo docker run -d --name elastic-hq -p 5000:5000 --restart always elastichq/elasticsearch-hq

      3. Run skywalking server:

        sudo docker run --name skywalking -d -p 1234:1234 -p 11800:11800 -p 12800:12800 --restart always --link elasticsearch:elasticsearch -e SW_STORAGE=elasticsearch -e SW_STORAGE_ES_CLUSTER_NODES=elasticsearch:9200 apache/skywalking-oap-server:8.3.0-es6

  2. Skywalking WebUI:

    1. Run SkyWalking webUI Server:

      sudo docker run --name skywalking-ui -d -p 8080:8080 --link skywalking:skywalking -e SW_OAP_ADDRESS=skywalking:12800 --restart always apache/skywalking-ui

    2. Open the webUI of skywalking: You can open dashboard with a browser: http://10.110.149.175:8080. It will be a successful install as follow:

  3. Test:

    • Access to upstream services through access apisix:

      $ curl -v http://10.110.149.192:9080/uid/12
HTTP/1.1 200 OK
OK
...

    • Open the webUI of skyWalking:

      http://10.110.149.175:8080/

      You can see the topology of all service

      You can also see the tracer of all service

Disable Plugin

When you want to disable the skyWalking plugin on a route/service, it is very simple, you can delete the corresponding json configuration in the plugin configuration, no need to restart the service, it will take effect immediately:

$ curl http://127.0.0.1:9080/apisix/admin/routes/1  -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
    "methods": ["GET"],
    "uris": [
        "/uid/*"
    ],
    "plugins": {
    },
    "upstream": {
        "type": "roundrobin",
        "nodes": {
            "10.110.149.175:8089": 1
        }
    }
}'

The skywalking plugin has been disabled now. It works for other plugins.

If you want to disable skywalking plugin totally, for example, stop the background report timer, you need to comment out in the config.yaml:

plugins:
  - ... # plugin you need
  #- skywalking

And then reload APISIX.

Upstream services(Code With SpringBoot)

package com.lenovo.ai.controller;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;

/**
 * @author cyxinda
 * @create 2020-05-29 14:02
 * @desc skywalking test controller
 **/
@RestController
public class TestController {
    @RequestMapping("/uid/{count}")
    public String getUidList(@PathVariable("count") String countStr, HttpServletRequest request) {
        System.out.println("counter:::::-----"+countStr);
       return "OK";
    }
}

Configuring the skywalking agent, when starting the service. update the file of agent/config/agent.config

agent.service_name=yourservername
collector.backend_service=10.110.149.175:11800

Run the script:

nohup java -javaagent:/root/skywalking/app/agent/skywalking-agent.jar \
-jar /root/skywalking/app/app.jar \
--server.port=8089 \
2>&1 > /root/skywalking/app/logs/nohup.log &