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2
.vuepress/config.js
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@ -362,6 +362,8 @@ module.exports = {
'k8s-practice/ocp/user-center',
'k8s-practice/ocp/api-gateway',
'k8s-practice/ocp/back-center',
'k8s-practice/ocp/review',
'k8s-practice/ocp/export',
]
},
]

6
README.md
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@ -95,9 +95,9 @@ Kubernetes教程的主要依据是：Kubernetes 官网文档，以及使用 Kubo
* [在K8S上部署redis](https://kuboard.cn/learning/k8s-practice/ocp/redis.html)
* [在K8S上部署auth-server](https://kuboard.cn/learning/k8s-practice/ocp/auth-server.html)
* [在K8S上部署user-center](https://kuboard.cn/learning/k8s-practice/ocp/user-center.html)
* [在K8S上部署api-gateway]
* [在K8S上部署back-center]
* [重新审视配置信息]
* [在K8S上部署api-gateway](https://kuboard.cn/learning/k8s-practice/ocp/api-gateway.html)
* [在K8S上部署back-center](https://kuboard.cn/learning/k8s-practice/ocp/back-center.html)
* [重新审视配置信息](https://kuboard.cn/learning/k8s-practice/ocp/review.html)
* [导出部署配置]
* [在新的名称空间导入部署配置]

6
learning/README.md
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@ -93,8 +93,8 @@ description: Kubernetes免费中文教程目录
* [在K8S上部署redis](/learning/k8s-practice/ocp/redis.html)
* [在K8S上部署auth-center](/learning/k8s-practice/ocp/auth-server.html)
* [在K8S上部署user-center](/learning/k8s-practice/ocp/user-center.html)
* [在K8S上部署api-gateway]
* [在K8S上部署back-center]
* [重新审视配置信息]
* [在K8S上部署api-gateway](/learning/k8s-practice/ocp/api-gateway.html)
* [在K8S上部署back-center](/learning/k8s-practice/ocp/back-center.html)
* [重新审视配置信息](/learning/k8s-practice/ocp/review.html)
* [导出部署配置]
* [在新的名称空间导入部署配置]

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learning/k8s-practice/ocp/export.md Normal file
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@ -0,0 +1,17 @@
---
vssueId: 104
titlePrefix: 部署SpringCloud_OCP
layout: LearningLayout
description: Kubernetes教程_使用Kuboard在Kubernetes上部署Spring_Cloud微服务平台OCP_open_capacity_platform微服务能力开放平台_导出部署配置
meta:
- name: keywords
content: Kubernetes部署SpringCloud,Kubernetes部署OCP,Kuboard部署OCP
---
# 导出部署配置
![Kubernetes教程_部署SpringCloud_OCP_导出部署配置_配置内容](./export.assets/image-20191001123231022.png)

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learning/k8s-practice/ocp/index.md
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@ -24,11 +24,11 @@ Kuboard 网站将陆续 **连载** 如何使用 Kuboard 在 Kubernetes 上部署
* [在K8S上部署mysql](/learning/k8s-practice/ocp/mysql.html)
* [在K8S上部署redis](/learning/k8s-practice/ocp/redis.html)
* [在K8S上部署auth-server](/learning/k8s-practice/ocp/auth-server.html)
* [在K8S上部署user-center]
* [在K8S上部署api-gateway]
* [在K8S上部署back-center]
* [重新审视配置信息]
* [导出部署配置]
* [在K8S上部署user-center](/learning/k8s-practice/ocp/user-server.html)
* [在K8S上部署api-gateway](/learning/k8s-practice/ocp/api-gateway.html)
* [在K8S上部署back-center](/learning/k8s-practice/ocp/back-center.html)
* [重新审视配置信息](/learning/k8s-practice/ocp/review.html)
* [导出部署配置](/learning/k8s-practice/ocp/export.html)
* [在新的名称空间导入部署配置]
::: tip OCP答疑

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@ -0,0 +1,183 @@
---
vssueId: 103
titlePrefix: 部署SpringCloud_OCP
layout: LearningLayout
description: Kubernetes教程_使用Kuboard在Kubernetes上部署Spring_Cloud微服务平台OCP_open_capacity_platform微服务能力开放平台_重新审视配置信息
meta:
- name: keywords
content: Kubernetes部署SpringCloud,Kubernetes部署OCP,Kuboard部署OCP
---
# 重新审视配置信息
在本系列文章的前面部分，我们已经完成了在 Kubernetes 上部署 Spring Cloud OCP 的主要组件：eureka-server、auth-server、user-cetner、api-gateway、back-center。
## 提取相同的参数
### 各模块中的环境变量
部署过程中，主要使用环境变量向容器内注入具体环境相关的信息，以便容器内应用程序可以使用特定于环境的配置。具体来说，主要有如下信息通过环境变量替换：
* eureka-server
* 使用环境变量覆盖 `eureka.client.service-url.defaultZone` 取值，将其设置为：
```
http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka
```
* 使用环境变量覆盖 `eureka.instance.prefer-ip-address` 取值，将其设置为：`false`
* auth-server
部署auth-server时，通过环境变量覆盖了如下参数：
* eureka.client.serviceUrl.defaultZone 覆盖为
```
http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka
```
* spring.datasource.druid.core.url 覆盖为
```
jdbc:mysql://db-auth-center:3306/oauth-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.datasource.druid.log.url 覆盖为
```
jdbc:mysql://db-log-center:3306/log-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.redis.host 覆盖为 `cloud-redis`
* user-center
部署user-center时，通过环境变量覆盖了如下参数：
* eureka.client.serviceUrl.defaultZone 覆盖为
```
http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka
```
* spring.datasource.druid.core.url 覆盖为
```
jdbc:mysql://db-user-center:3306/user-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.datasource.druid.log.url 覆盖为
```
jdbc:mysql://db-log-center:3306/log-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.redis.host 覆盖为 `cloud-redis`
* api-gateway
部署api-gateway时，通过环境变量覆盖了如下参数：
* eureka.client.serviceUrl.defaultZone 覆盖为
```
http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka
```
* spring.datasource.druid.core.url 覆盖为
```
jdbc:mysql://db-auth-center:3306/oauth-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.datasource.druid.log.url 覆盖为
```
jdbc:mysql://db-log-center:3306/log-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
```
* spring.redis.host 覆盖为 `cloud-redis`
* back-center
部署back-center时，通过环境变量覆盖了如下参数：
* GATEWAY_API_URL
* CLOUD_EUREKA_URL
### 相同的参数
回顾一下，可以发现如下相同的参数：
* eureka.client.service-url.defaultZone
使用到此参数，且取值相同的模块有：
* eureka-server
* auth-server
* user-center
* api-gateway
* spring.datasource.druid.core.url
使用到此参数的模块有，（但是他们的参数值不同）
* auth-server
* user-center
* spring.datasource.druid.log.url
使用到此参数，且取值相同的模块有：
* auth-server
* user-center
* api-gateway
* spring.redis.host
使用到此参数，且取值相同的模块有：
* auth-server
* user-center
* api-gateway
### 提取参数到ConfigMap
可参考文档 [使用ConfigMap配置您的应用程序](/learning/k8s-intermediate/config/config-map.html#configmap-%E5%AE%B9%E5%99%A8%E7%9A%84%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F%EF%BC%88configmap%E7%9A%84%E6%89%80%E6%9C%89%E5%90%8D%E5%80%BC%E5%AF%B9%EF%BC%89)
* 在 Kuboard 界面中进入 `ocp` 名称空间
* 创建ConfigMap，并填入三个名值对：
* <span style="color: blue">eureka.client.serviceUrl.defaultZone</span> = `http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka`
* <span style="color: blue">spring.datasource.druid.log.url</span> = `jdbc:mysql://db-log-center:3306/log-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false`
* <span style="color: blue">spring.redis.host</span> = `cloud-redis`
![Kubernetes教程：部署SpringCloud_创建ConfigMap](./review.assets/image-20191001090827800.png)
* 修改 eureka-server、auth-server、user-center、api-gateway 的部署信息，将上面创建的 ConfigMap 中所有名值对注入到容器的环境变量，并去除已经在 ConfigMap 中包含的环境变量。
以 eureka-server 为例，编辑该工作负载的界面截图如下所示：
![Kubernetes教程_部署SpringCloud_OCP_ConfigMap](./review.assets/image-20191001101121469.png)
::: tip
将相同的参数提炼到 ConfigMap 可以使配置更简洁。
:::
## 为谁定义变量
在本教程中，为了避免对 OCP 已有代码的修改，因此以直接注入 `spring.datasource.druid.log.url` 类似的环境变量的方式，使docker镜像适应不同的环境（开发环境、测试环境、生产环境等）。这种做法就会碰到一个比较尴尬的情况，例如，对于参数 `spring.datasource.druid.core.url` 键值相同，而不同模块中（auth-server、user-center、api-gateway）取值却不同。这是从参数使用者视角来看不可避免的现象。
一个建议的方式是，从参数提供者的视角来定义环境变量参数，并由参数使用者引用。例如，我们定义如下几个ConfigMap属性：
* <font color="blue">EUREKA_URLS</font>=http://cloud-eureka-0.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-1.cloud-eureka.ocp.svc.cluster.local:1111/eureka,http://cloud-eureka-2.cloud-eureka.ocp.svc.cluster.local:1111/eureka
* <font color="blue">DB_AUTH_CENTER_URL</font>=jdbc:mysql://db-auth-center:3306/auth-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries</font>=true&useSSL=false
* <font color="blue">DB_USER_CENTER_URL</font>=jdbc:mysql://db-user-center:3306/user-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
* <font color="blue">DB_LOG_CENTER_URL</font>=jdbc:mysql://db-log-center:3306/log-center?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
* <font color="blue">REDIS_HOST</font>=cloud-redis
然后在参数使用者的 `application.xml` 中引用这些环境变量参数，以 auth-center 的 `application.xml` 为例：
```yaml {10,15,20}
spring:
session:
store-type: redis
datasource:
dynamic:
enable: true
druid:
# JDBC 配置(驱动类自动从url的mysql识别,数据源类型自动识别)
core:
url: ${DB_AUTH_CENTER_URL}
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
log:
url: ${DB_LOG_CENTER_URL}
username: root
password: root
redis:
host: ${REDIS_HOST}
port: 6379
timeout: 6000
```

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overview/README.md
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@ -187,7 +187,7 @@ Kuboard 为 Kubernetes 初学者设计了如下学习路径：
* [在K8S上部署user-center](/learning/k8s-practice/ocp/user-center.html)
* [在K8S上部署api-gateway](/learning/k8s-practice/ocp/api-gateway.html)
* [在K8S上部署back-center](/learning/k8s-practice/ocp/back-center.html)
* [重新审视配置信息]
* [重新审视配置信息](/learning/k8s-practice/ocp/review.html)
* [导出部署配置]
* [在新的名称空间导入部署配置]