Unable to deploy a custom namer as plugin

[bethle...@indix.com]

Hi,

I have followed linkerd-plugin-dev doc and developed a marathon-namer that resolves apps (services) based on the hostnames.

My configuration is as below:

> namers:

> - kind: io.buoyant.marathonHostNamer

>   host: mesos.marathon

>   port: 8080

>

> routers:

> - protocol: http

>   servers:

>   - port: 4140

>     ip: 0.0.0.0

>   dtab: >-

>     /marathonId => /#/io.buoyant.marathonHostNamer;

>     /svc      => /marathonId

I get the below log on starting linkerd.

com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve type id 'io.buoyant.marathonHostNamer' into a subtype of [simple type, class io.buoyant.namer.NamerConfig]: known type ids = [NamerConfig, io.l5d.consul, io.l5d.curator, io.l5d.fs, io.l5d.k8s, io.l5d.k8s.external, io.l5d.marathon, io.l5d.rewrite, io.l5d.serversets, io.l5d.zkLeader]

 at [Source: java.io.StringReader@6b587673; line: 9, column: 9] (through reference chain: io.buoyant.linkerd.Linker$LinkerConfig["namers"]->com.fasterxml.jackson.module.scala.deser.BuilderWrapper[0])

at com.fasterxml.jackson.databind.exc.InvalidTypeIdException.from(InvalidTypeIdException.java:42)

at com.fasterxml.jackson.databind.DeserializationContext.unknownTypeIdException(DeserializationContext.java:1477)

at com.fasterxml.jackson.databind.DeserializationContext.handleUnknownTypeId(DeserializationContext.java:1170)

at com.fasterxml.jackson.databind.jsontype.impl.TypeDeserializerBase._handleUnknownTypeId(TypeDeserializerBase.java:282)

at com.fasterxml.jackson.databind.jsontype.impl.TypeDeserializerBase._findDeserializer(TypeDeserializerBase.java:156)

at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer._deserializeTypedForId(AsPropertyTypeDeserializer.java:112)

at com.fasterxml.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer.deserializeTypedFromObject(AsPropertyTypeDeserializer.java:97)

at com.fasterxml.jackson.databind.deser.AbstractDeserializer.deserializeWithType(AbstractDeserializer.java:142)

at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:289)

at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:259)

at com.fasterxml.jackson.module.scala.deser.SeqDeserializer.deserialize(SeqDeserializerModule.scala:78)

at com.fasterxml.jackson.module.scala.deser.SeqDeserializer.deserialize(SeqDeserializerModule.scala:61)

at com.fasterxml.jackson.module.scala.deser.OptionDeserializer.deserialize(OptionDeserializerModule.scala:60)

at com.fasterxml.jackson.module.scala.deser.OptionDeserializer.deserialize(OptionDeserializerModule.scala:11)

at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:499)

at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeWithErrorWrapping(BeanDeserializer.java:511)

at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeUsingPropertyBased(BeanDeserializer.java:396)

at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1197)

at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:314)

at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:148)

at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3798)

at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2880)

at com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper$class.readValue(ScalaObjectMapper.scala:190)

at io.buoyant.config.Parser$$anon$1.readValue(Parser.scala:79)

at io.buoyant.linkerd.Linker$.parse(Linker.scala:81)

at io.buoyant.linkerd.Main$.loadLinker(Main.scala:61)

at io.buoyant.linkerd.Main$.main(Main.scala:31)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.twitter.app.App$$anonfun$nonExitingMain$3.apply(App.scala:176)

at com.twitter.app.App$$anonfun$nonExitingMain$3.apply(App.scala:175)

at scala.Option.foreach(Option.scala:257)

at com.twitter.app.App$class.nonExitingMain(App.scala:175)

at io.buoyant.linkerd.Main$.nonExitingMain(Main.scala:20)

at com.twitter.app.App$class.main(App.scala:141)

at io.buoyant.linkerd.Main$.main(Main.scala:20)

at io.buoyant.linkerd.Main.main(Main.scala)

Exception thrown in main on startup

Any help is much appreciated.

Thanks in advance.

Bethleharaja G.

[Andrew Seigner]

(Answer at https://discourse.linkerd.io/t/unable-to-deploy-a-custom-namer-as-plugin/91)

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