Spring Cloud Kubernetes - ConfigMap使用
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一、ConfigMap
加载思路：
创建configmap，挂载配置文件为application.yml，最好指定profile
加载bootstrap配置 -> 指定profile -> 寻找对应profile挂载的文件 -> pooling or event
Service改造
1、引入依赖
## 接入 kubernetes configmap
implementation ('org.springframework.cloud:spring-cloud-starter-kubernetes-client-config:2.1.4')
## 热更新
implementation("org.springframework.boot:spring-boot-actuator")
implementation("org.springframework.boot:spring-boot-actuator-autoconfigure")
2、新增bootstrap.yml文件
根目录下新增bootstrap.yml文件
server:
port: 8080
spring:
application:
name: server
cloud:
kubernetes:
enabled: false
本地开发时，指定spring.cloud.kubernetes.enabled=false，关闭kubernetes配置
3、修改各环境配置文件
修改dist目录下的各个配置文件为bootstrap.yml，同时修改配置，以test环境为例
server:
port: 8080
management:
endpoint:
restart:
enabled: true
health:
enabled: true
info:
enabled: true
spring:
application:
name: server
cloud:
kubernetes:
reload:
enabled: true
mode: event
config:
sources:
- name: demo-configmap
namespace: test
profiles:
active: k8s-test
K8S部署
1、创建ConfigMap
kubectl create configmap demo-configmap --from-file=application.yml -n test
server:
port: 8080
# servlet.context-path: /${spring.application.name}
spring:
profiles: k8s-test
mvc:
pathmatch:
matching-strategy: ant_path_matcher
application:
name: server
cloud:
kubernetes:
config:
sources:
- name: demo-comfigmap
namespace: test
reload:
enabled: true
mode: event
logging:
config: classpath:logback.xml
endpoint:
restart:
enabled: true
health:
enabled: true
info:
enabled: true
2、创建ServiceAccount
创建Role
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
namespace: test
name: config-reader
rules:
- apiGroups: [""]
resources: ["pods","configmaps","services","endpoints"]
verbs: ["get", "watch", "list"]
创建ServiceAccount
apiVersion: v1
kind: ServiceAccount
metadata:
name: config-reader
namespace: test
绑定Role和ServiceAccount
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: config-reader
namespace: test
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: config-reader
subjects:
- kind: ServiceAccount
name: config-reader
namespace: test
3、创建Deployment，指定ConfigMap、ServiceAccount
serviceAccountName: config-reader
serviceAccount: config-reader
为什么使用bootstrap.yml，参考：www.jianshu.com/p/c955c44ae…
即系统级别的配置信息放在bootstrap.yml中，自定义的配置信息放在application.yml中。
建议
系统级别以及不可变的配置放在项目代码中，不做更改
可变的、自定义的配置放在configmap中做热更新