Yaeger v1.0.1 serial key or number

Jaeger middleware to request tracing for express application

Opentracing

To fully understand Opentracing, it's helpful to be familiar with the OpenTracing project and terminology more specifically.

Jaeger(One Of Request Tracing System implement Opentracing)

To fully understand Jaeger, it's helpful to be familiar with the Jaeger project and Jaeger Client for Node

One request map to one trace

One trace atleast has one span which is master span

Master span can have many children spans

Architecture of Jaeger Server

for development

for prodution

Build up Jaeger Server Infra locally(development env)

normallyUsingSpan2Log

usingSpan2LogWithError

remoteCallingAndlogResult

remoteCallingAndlogResultInTwoSpan

open url http://localhost , remember to build up the Jager Server locally first

Config

for detail, pls look up to Jaeger Client for Node

options

for detail, pls look up to Jaeger Client for Node

jaeger

jaeger object will bind in req when you do "cromwellpsi.com(jaeger(config,options))"

log

setTag

setTracingTag

addTags

createSpan

tags

predefined tag, some come from OpenTracing project

axios

cromwellpsi.com wrap axios with tracing header, for usage detail pls look up to axios

license

MIT

The APM Server exposes an API endpoint to upload source maps for real user monitoring (RUM). See the create and upload source maps guide to get started.

Upload endpointedit

Send a request with the header set to to the source map endpoint:

Request Fieldsedit

The request must include some fields needed to identify correctly later on:

You can configure an API key or secret token to restrict sourcemap uploads.

How source maps are appliededit

APM Server attempts to find the correct source map for each in an event. To do this, it tries the following:

If a source map is found, the attributes , , , and are overwritten, and is cleaned to be the shortest path name equivalent to the given path name. If multiple source maps are found, the one with the latest upload timestamp is used.

Exampleedit

Example source map request including an optional secret token "mysecret":

How to Migrate from Traefik v1 to Traefik v2.

The version 2 of Traefik introduces a number of breaking changes, which require one to update their configuration when they migrate from v1 to v2. The goal of this page is to recapitulate all of these changes, and in particular to give examples, feature by feature, of how the configuration looked like in v1, and how it now looks like in v2.

Frontends and Backends Are Dead
Long Live Routers, Middlewares, and Services¶

During the transition from v1 to v2, a number of internal pieces and components of Traefik were rewritten and reorganized. As such, the combination of core notions such as frontends and backends has been replaced with the combination of routers, services, and middlewares.

Typically, a router replaces a frontend, and a service assumes the role of a backend, with each router referring to a service. However, even though a backend was in charge of applying any desired modification on the fly to the incoming request, the router defers that responsibility to another component. Instead, a dedicated middleware is now defined for each kind of such modification. Then any router can refer to an instance of the wanted middleware.

TLS Configuration is Now Dynamic, per Router.¶

TLS parameters used to be specified in the static configuration, as an entryPoint field. With Traefik v2, a new dynamic TLS section at the root contains all the desired TLS configurations. Then, a router's TLS field can refer to one of the TLS configurations defined at the root, hence defining the TLS configuration for that router.

HTTP to HTTPS Redirection is Now Configured on Routers¶

Previously on Traefik v1, the redirection was applied on an entry point or on a frontend. With Traefik v2 it is applied on an entry point or a Router.

To apply a redirection:

Strip and Rewrite Path Prefixes¶

With the new core notions of v2 (introduced earlier in the section "Frontends and Backends Are Dead Long Live Routers, Middlewares, and Services"), transforming the URL path prefix of incoming requests is configured with middlewares, after the routing step with router rule .

Use Case: Incoming requests to are forwarded to the webapplication "admin", with the path stripped, e.g. to . In this case, you must:

• First, configure a router named with a rule matching at least the path prefix with the keyword,
• Then, define a middleware of type , which removes the prefix , associated to the router .

ACME (LetsEncrypt)¶

ACME is now a certificate resolver (under a certificatesResolvers section) but remains in the static configuration.

Traefik Logs¶

In the v2, all the log configuration remains in the static part but are unified under a section. There is no more log configuration at the root level.

Access Logs¶

Access Logs are configured in the same way as before.

But all request headers are now filtered out by default in Traefik v2. So during migration, you might want to consider enabling some needed fields (see access log configuration).

Tracing¶

Traefik v2 retains OpenTracing support. The root option from the v1 is gone, you just have to set your tracing configuration.

Metrics¶

The v2 retains metrics tools and allows metrics to be configured for the entrypoints and/or services. For a basic configuration, the metrics configuration remains the same.

No More Root Level Key/Values¶

To avoid any source of confusion, there are no more configuration at the root level. Each root item has been moved to a related section or removed.