来自kubernetes yaml的变量导致：无法解析值“$ {ACTUATOR_PASSWORD}”中的占位符'ACTUATOR_PASSWORD'

Question

当我从IntelliJ运行我的应用程序时，我得到一个warning / error虽然应用程序构建正常并运行所有测试，这是我应该忽略的东西，还是可以解决这个问题？

Kubernetes secret用于创建随机密码，因此我有一个占位符用于该特定变量。

2019-02-26 19:45:29.600  INFO 38918 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-02-26 19:45:29.684  WARN 38918 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'actuatorSecurity': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'ACTUATOR_PASSWORD' in value "${ACTUATOR_PASSWORD}"
2019-02-26 19:45:29.685  INFO 38918 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2019-02-26 19:45:29.685  INFO 38918 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2019-02-26 19:45:29.707  INFO 38918 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2019-02-26 19:45:29.713  INFO 38918 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]

qronicle-deployment.yaml

apiVersion: v1
kind: Secret
metadata:
  name: actuator
  namespace: {{ .Release.Namespace }}
type: Opaque
data:
  actuator-password: {{ randAlphaNum 10 | b64enc | quote }}
....
- name: ACTUATOR_PASSWORD
  valueFrom:
    secretKeyRef:
      name: actuator
      key: actuator-password

application.properties

# spring boot actuator access control
management.endpoints.web.exposure.include=*
security.user.actuator-username=admin
security.user.actuator-password=${ACTUATOR_PASSWORD}

ACTUATOR_PASSWORD在这里消费

@Configuration
@EnableWebSecurity
class ActuatorSecurity : WebSecurityConfigurerAdapter() {
    @Value("\${security.user.actuator-username}")
    private val actuatorUsername: String? = null

    @Value("\${security.user.actuator-password}")
    private val actuatorPassword: String? = null

    ....
}

Answer 1

通常，对于秘密，您将把它安装在部署yaml之外。

在这里，您可以在节点将要运行的k8上下文下运行kubectl create secret generic <secret_name> --from-literal <secret_key> ='<password>'。

这将在那里创建一个秘密，你上面的部署yaml将它映射到环境变量。

Answer 2

这就是application.properties文件中的技巧

security.user.password = $ {ACTUATOR_PASSWORD：为admin123}

如果没有提供env var，将使用admin123