[英]How to build simple Linkerd namer plugin?
I'm trying to run linkerd with some custom namer plug-in but failing on startup. 我正在尝试使用一些自定义命名器插件运行linkerd,但是启动失败。 I've got the source code of io.l5d.fs and cut off all the business logic to get some minimalistic example with hardcoded addresses. 我已经有了io.l5d.fs的源代码,并切断了所有业务逻辑,以获取一些带有硬编码地址的简约示例。
Initializer: 初始化器:
package com.consg
import io.buoyant.namer.NamerInitializer
class MyInitializer extends NamerInitializer {
val configClass = classOf[MyConfig]
override def configId = "com.consg.MyConfig"
}
object MyInitializer extends MyInitializer
Config: 配置:
package com.consg
import com.fasterxml.jackson.annotation.JsonIgnore
import com.twitter.finagle.{Path, Stack}
import io.buoyant.config.types.Directory
import io.buoyant.namer.NamerConfig
case class MyConfig(rootDir: Directory) extends NamerConfig {
@JsonIgnore
override def defaultPrefix: Path = Path.read("/my.namer")
@JsonIgnore
def newNamer(params: Stack.Params) = {
println("params: " + params)
new MyNamer(rootDir.path, prefix)
}
}
Namer: 姓名:
package com.consg
import java.nio.file.{Path => NioPath}
import com.twitter.finagle._
import com.twitter.util._
import io.buoyant.namer.EnumeratingNamer
class MyNamer(rootDir: NioPath, prefix: Path) extends EnumeratingNamer {
def lookup(path: Path): Activity[NameTree[Name]] = {
println("lookup path: " + path)
val address1 = Address("127.0.0.1", 7777)
val addr = Addr.Bound(Set(address1), Addr.Metadata.empty)
val varr = Var.apply(addr)
Activity.value(NameTree.Leaf(Name.Bound(varr, path, path)))
}
override def getAllNames: Activity[Set[Path]] = {
println("getAllNames!")
Activity.value(Set.apply(Path.read("animal")))
}
}
build.sbt build.sbt
name := "plug"
version := "1"
scalaVersion := "2.12.1"
libraryDependencies += "io.buoyant" % "linkerd-core_2.12" % "1.3.2" % "provided"
Also I exposed the "com.consg.MyInitializer" service under META-INF/services/io.buoyant.namer.NamerInitializer 我还公开了META-INF / services / io.buoyant.namer.NamerInitializer下的“ com.consg.MyInitializer”服务
Then I build the plugin jar & placed it under plugins (linkerd-1.3.1/plugins) 然后,我构建插件jar并将其放在插件下(linkerd-1.3.1 / plugins)
Now I'm trying to run linkerd with config: 现在,我尝试使用config运行linkerd:
namers:
- kind: com.consg.MyConfig
rootDir: disco
routers:
- protocol: http
dtab: /svc => /#/my.namer;
servers:
- port: 8080
And as a result I've got: 结果,我得到了:
com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve type id 'com.consg.MyConfig' into a subtype of [simple type, class io.buoyant.namer.NamerConfig]: known type ids = [NamerConfig, io.l5d.consul, io.l5d.curator, io.l5d.dnssrv, io.l5d.fs, io.l5d.k8s, io.l5d.k8s.external, io.l5d.k8s.ns, io.l5d.marathon, io.l5d.rewrite, io.l5d.serversets, io.l5d.zkLeader]
So it looks like the plugin not loaded at all. 因此,看起来插件根本没有加载。 Need some help. 需要一些帮助。
Looks like my problem was undefined $L5D_HOME environment variable. 看来我的问题是未定义的$ L5D_HOME环境变量。 After I've set it the plug-in was enabled. 设置好之后,插件即被启用。
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