京公网安备11010502063487号Config Server 的配置到底怎么合并的?和本地的 application.properties 谁优先?服务端挂了客户端会怎样?git 里改了配置要不要重启?加密的配置是在哪里解密的?这篇用一个本地 git 仓库在 Spring Cloud Config 5.0.5 上逐项验证。
GET /orders/default → 200,name=orders,profiles=['default'],label=None,propertySources(按优先级从高到低)= [('orders.properties', 2), ('application.properties', 2)]
GET /orders/dev → 200,name=orders,profiles=['dev'],label=None,propertySources(按优先级从高到低)= [('orders-dev.properties', 1), ('orders.properties', 2), ('application.properties', 2)]
GET /orders/dev/beta → 200,name=orders,profiles=['dev'],label=beta,propertySources(按优先级从高到低)= [('orders-dev.properties', 1), ('orders.properties', 2), ('application.properties', 2)]
GET /orders-dev.properties → 200,内容(合并之后,按优先级): shared.key: shared-from-git ; greeting: hello-from-orders-dev ; orders.k: orders-k
GET /nope/default(没有 nope.properties)→ 200,propertySources = [('application.properties', 2)]应用名-profile 优先,其次应用名,最后 application;拼错应用名也是 200。
客户端 spring.application.name=orders,不设 profile:greeting=hello-from-orders; shared.key=shared-from-git; orders.k=orders-k; local.only=yes; secret.pw=null; 属性源(高到低):configurationProperties | servletConfigInitParams | configserver:file:///Users/w/Desktop/zen/tools/articles/jtmp/x125repo/orders.properties | configserver:file:///Users/w/Desktop/zen/tools/articles/jtmp/x125repo/application.properties | configClient | Config resource 'file [application.properties]' via location 'optional:file:./' | Config resource 'class path resource [application.properties]' via location 'optional:classpath:/' | applicationInfo spring.profiles.active=dev:greeting=hello-from-orders-dev; shared.key=shared-from-git; orders.k=orders-k; local.only=yes; secret.pw=null; spring.cloud.config.label=beta:greeting=hello-from-beta; shared.key=shared-from-git; orders.k=orders-k; local.only=yes; secret.pw=null;
spring.config.import 取配置,远程高于本地 application.properties;profile 与 label 传给服务端。
optional:configserver,服务端没启动:客户端启动成功 → greeting=local-greeting; shared.key=null; orders.k=local-k; local.only=yes; secret.pw=null; 去掉 optional:,服务端没启动:客户端启动失败(耗时 0.5 秒):Exception in thread "main" ConfigClientFailFastException: Could not locate PropertySource and the resource is not optional, failing | Caused by: org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://127.0.0.1:9602/orders/default": Connection refused (connect failed)
optional 悄悄用本地值;去掉 optional 启动失败。
提交之后,服务端不重启,GET /orders/default 里的 greeting = hello-changed-in-git 已经在运行的客户端不重启,GET /v 的 greeting:hello-from-orders(提交之前是 hello-from-orders) 重启客户端之后 greeting = hello-changed-in-git
服务端实时读 git,客户端只在启动时拉一次。
POST /encrypt → 200,密文长度 64 个字符
服务端 GET /orders/default 里 secret.pw = s3cret-pw
客户端看到:secret.pw=s3cret-pw;
服务端 encrypt.enabled=false:服务端返回的 secret.pw 以 {cipher} 开头(没有解密)
客户端启动失败:Caused by: java.lang.UnsupportedOperationException: No decryption for FailsafeTextEncryptor. Did you configure the keystore correctly?服务端解密后传明文;encrypt.enabled=false 时客户端没有密钥会启动失败。