The Learn Layer5 sample application is to be available for use across all service meshes that Meshery supports and is to used as:
- a learning device (for service mesh workshops)
- for Service Mesh Interface conformance
The Learn Layer5 application includes three services: app-a
, app-b
, and app-c
. Though they are different services, they are defined using the same app (source code in ./service). Each service is listening on port 9091/tcp
.
The following are the routes defined by the service
app and their functionality.
This route makes the service make requests to another service. Metrics are collected for this route. sample usage given below:
# Command
curl --location --request POST 'http://service-a:9091/call' \
--header 'Content-Type: application/json' \
--data-raw '{
"url": "http://service-b:9091/call",
"body": "{\r\n\"url\": \"http:\/\/service-c:9091\/echo\",\r\n\"body\": \"\",\r\n\"method\": \"GET\"\r\n}",
"method": "POST",
"headers": {
"h1":"v1"
}
}'
# No Output
GET /echo HTTP/1.1
Host: service-c:9091
User-Agent: Go-http-client/1.1
Accept-Encoding: gzip
Servicename: Service-B
In the above example, we are making a post request to service-a
with the body:
{
"url": "http://service-b:9091/call",
"body": "{\r\n\"url\": \"http:\/\/service-c:9091\/echo\",\r\n\"body\": \"\",\r\n\"method\": \"GET\"\r\n}",
"method": "POST",
"headers": {
"h1":"v1"
}
}
This will make service-a
to make a POST
request to http://service-b:9091/call
with the headers specified above, and the body:
{
"url": "http://service-c:9091/echo",
"body":"",
"method": "GET"
}
This inturn will make service-b
to make a GET
request to http://service-c:9091/echo
.
Gets the metrics from service-a
# Command
curl --location --request GET 'http://service-b:9091/metrics'
# Output
{
"ReqReceived": [
"Service-A"
],
"RespSucceeded": [
{
"URL": "http://service-c:9091/echo",
"Method": "GET",
"Headers": null
}
],
"RespFailed": []
}
- In ReqReceived we see list of requests
service-b
received and from whom it received. Here we seeservice-A
. Actually each of the service sets a headerServiceName
which is read by the service to determine the sender. - As
service-b
made a request toservice-c
and the request succeeded, we can see the details in the list of successful responses (RespSucceeded).
Clears the counters in service
# Command
curl --location --request DELETE 'http://34.68.35.174:9091/metrics'
# No Output
Note: metrics are collected only for
/call
and/echo
.
The learn-layer5
application serves as a sample application to validate the conformance of any service mesh with the SMI specifications. To verify SMI conformance, run Meshery and the Meshery adapter for the specific service mesh you wish to test. Invoke the suite of SMI conformance tests on the specific service mesh you would like to validate.
As a Service Mesh user Meshery allows you to schedule tests and invoke them programmatically. Meshery will store these test results and allow you to retrieve them later.
As a Service Mesh maker Meshery guarantees provenance of these tests and facilitates the public publicing of this suite of tests results into a versioned, public matrix of conformance status (consisting of both supported capabilities and test compliance).
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License
This repository and site are available as open source under the terms of the Apache 2.0 License.