从Unauthorized 401错误学习Spring Boot的Actuator

之前用Spring Boot都是别人搭好的框架，然后自己在里面写就行了。对原理、细节上都怎么涉及，毕竟需求都做不完。但是昨天一个访问RESTful接口的401问题搞了我2个小时。网上找的很多用：

 managements.security.enabled=false

并且添加一个actxxx包的方法对我也不管用，因为项目里面已经配置了这个。但是我还是遇到了401的这个问题。不死心继续搜，然后加入了这个配置就好了：

 security.ignored=/**

解决这个问题居然花了我两个小时，还是到处去找，不懂Spring Boot框架的原理，比如安全方面的，除了问题两眼一抹黑。

目标：弄清Spring Boot整体框架和框架中每个小块的基本知识。

Features

• Create stand-alone Spring applications

• Embed Tomcat, Jetty or Undertow directly (no need to deploy WAR files)

• Provide opinionated 'starter' dependencies to simplify your build configuration

• Automatically configure Spring and 3rd party libraries whenever possible

• Provide production-ready features such as metrics, health checks and externalized configuration

• Absolutely no code generation and no requirement for XML configuration

真的是打扰了，内容好像挺多的。

第四部分：Spring Boot Actuator: 为生产环境准备的特性

Actuator: 执行器，驱动器。当你把应用发布到生产环境的时候，Spring Boot提供了一些额外的特性来帮助你监控和管理应用。你通过选择HTTP endpoints或者JMX来管理和监控你的应用。

审计，健康和度量收集可以自动地加入到应用中。

V. Spring Boot Actuator: Production-ready features
49. Enabling Production-ready Features
50. Endpoints
50.1. Enabling Endpoints
50.2. Exposing Endpoints
50.3. Securing HTTP Endpoints
50.4. Configuring Endpoints
50.5. Hypermedia for Actuator Web Endpoints
50.6. Actuator Web Endpoint Paths
50.7. CORS Support
50.8. Implementing Custom Endpoints
50.8.1. Receiving Input
Input type conversion
50.8.2. Custom Web Endpoints
Web Endpoint Request Predicates
Path
HTTP method
Consumes
Produces
Web Endpoint Response Status
Web Endpoint Range Requests
Web Endpoint Security
50.8.3. Servlet endpoints
50.8.4. Controller endpoints
50.9. Health Information
50.9.1. Auto-configured HealthIndicators
50.9.2. Writing Custom HealthIndicators
50.9.3. Reactive Health Indicators
50.9.4. Auto-configured ReactiveHealthIndicators
50.10. Application Information
50.10.1. Auto-configured InfoContributors
50.10.2. Custom Application Information
50.10.3. Git Commit Information
50.10.4. Build Information
50.10.5. Writing Custom InfoContributors
51. Monitoring and Management over HTTP
51.1. Customizing the Management Endpoint Paths
51.2. Customizing the Management Server Port
51.3. Configuring Management-specific SSL
51.4. Customizing the Management Server Address
51.5. Disabling HTTP Endpoints
52. Monitoring and Management over JMX
52.1. Customizing MBean Names
52.2. Disabling JMX Endpoints
52.3. Using Jolokia for JMX over HTTP
52.3.1. Customizing Jolokia
52.3.2. Disabling Jolokia
53. Loggers
53.1. Configure a Logger
54. Metrics
54.1. Getting started
54.2. Supported monitoring systems
54.2.1. Atlas
54.2.2. Datadog
54.2.3. Ganglia
54.2.4. Graphite
54.2.5. Influx
54.2.6. JMX
54.2.7. New Relic
54.2.8. Prometheus
54.2.9. SignalFx
54.2.10. Simple
54.2.11. StatsD
54.2.12. Wavefront
54.3. Supported Metrics
54.3.1. Spring MVC Metrics
54.3.2. Spring WebFlux Metrics
54.3.3. RestTemplate Metrics
54.3.4. Cache Metrics
54.3.5. DataSource Metrics
54.3.6. RabbitMQ Metrics
54.4. Registering custom metrics
54.5. Customizing individual metrics
54.5.1. Per-meter properties
54.6. Metrics endpoint
55. Auditing
56. HTTP Tracing
56.1. Custom HTTP tracing
57. Process Monitoring
57.1. Extending Configuration
57.2. Programmatically
58. Cloud Foundry Support
58.1. Disabling Extended Cloud Foundry Actuator Support
58.2. Cloud Foundry Self-signed Certificates
58.3. Custom context path
59. What to Read Next
VI. Deploying Spring Boot Applications
60. Deploying to the Cloud
60.1. Cloud Foundry
60.1.1. Binding to Services
60.2. Heroku
60.3. OpenShift
60.4. Amazon Web Services (AWS)
60.4.1. AWS Elastic Beanstalk
Using the Tomcat Platform
Using the Java SE Platform
60.4.2. Summary
60.5. Boxfuse and Amazon Web Services
60.6. Google Cloud
61. Installing Spring Boot Applications
61.1. Supported Operating Systems
61.2. Unix/Linux Services
61.2.1. Installation as an init.d Service (System V)
Securing an init.d Service
61.2.2. Installation as a systemd Service
61.2.3. Customizing the Startup Script
Customizing the Start Script when It Is Written
Customizing a Script When It Runs
61.3. Microsoft Windows Services
62. What to Read Next