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[zh-cn]sync updating-configuration-via-a-configmap
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content/zh-cn/docs/tutorials/configuration/updating-configuration-via-a-configmap.md
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@ -12,16 +12,17 @@ weight: 20
<!-- overview --> <!-- overview -->
<!-- <!--
This page provides a step-by-step example of updating configuration within a Pod via a ConfigMap This page provides a step-by-step example of updating configuration within a Pod via a ConfigMap
and builds upon the [Configure a Pod to Use a ConfigMap](/docs/tasks/configure-pod-container/configure-pod-configmap/) task. and builds upon the [Configure a Pod to Use a ConfigMap](/docs/tasks/configure-pod-container/configure-pod-configmap/) task.
At the end of this tutorial, you will understand how to change the configuration for a running application. At the end of this tutorial, you will understand how to change the configuration for a running application.
This tutorial uses the `alpine` and `nginx` images as examples. This tutorial uses the `alpine` and `nginx` images as examples.
--> -->
本页提供了通过 ConfigMap 更新 Pod 中配置信息的分步示例， 本页提供了通过 ConfigMap 更新 Pod 中配置信息的分步示例，
本教程的前置任务是[配置 Pod 以使用 ConfigMap](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/)。 本教程的前置任务是[配置 Pod 以使用 ConfigMap](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/)。
在本教程结束时，你将了解如何变更运行中应用的配置。 在本教程结束时，你将了解如何变更运行中应用的配置。
本教程以 `alpine` 和 `nginx` 镜像为例。 本教程以 `alpine` 和 `nginx` 镜像为例。
## {{% heading "prerequisites" %}} ## {{% heading "prerequisites" %}}
{{< include "task-tutorial-prereqs.md" >}} {{< include "task-tutorial-prereqs.md" >}}
<!-- <!--
@ -85,7 +86,8 @@ kubectl apply -f https://k8s.io/examples/deployments/deployment-with-configmap-a
Check the pods for this Deployment to ensure they are ready (matching by Check the pods for this Deployment to ensure they are ready (matching by
{{< glossary_tooltip text="selector" term_id="selector" >}}): {{< glossary_tooltip text="selector" term_id="selector" >}}):
--> -->
检查此 Deployment 的 Pod 以确保它们已就绪（通过{{< glossary_tooltip text="选择算符" term_id="selector" >}}进行匹配）： 检查此 Deployment 的 Pod 以确保它们已就绪
（通过{{< glossary_tooltip text="选择算符" term_id="selector" >}}进行匹配）：
```shell ```shell
kubectl get pods --selector=app.kubernetes.io/name=configmap-volume kubectl get pods --selector=app.kubernetes.io/name=configmap-volume
@ -161,8 +163,20 @@ Here's an example of how that manifest could look after you edit it:
以下是你编辑后该清单可能的样子： 以下是你编辑后该清单可能的样子：
<!-- <!--
```yaml
apiVersion: v1
data:
sport: cricket
kind: ConfigMap
# You can leave the existing metadata as they are. # You can leave the existing metadata as they are.
# The values you'll see won't exactly match these. # The values you'll see won't exactly match these.
metadata:
creationTimestamp: "2024-01-04T14:05:06Z"
name: sport
namespace: default
resourceVersion: "1743935"
uid: 024ee001-fe72-487e-872e-34d6464a8a23
```
--> -->
```yaml ```yaml
apiVersion: v1 apiVersion: v1
@ -213,23 +227,23 @@ Thu Jan 4 14:12:16 UTC 2024 My preferred sport is cricket
<!-- <!--
When you have a ConfigMap that is mapped into a running Pod using either a When you have a ConfigMap that is mapped into a running Pod using either a
`configMap` volume or a `projected` volume, and you update that ConfigMap, `configMap` volume or a `projected` volume, and you update that ConfigMap,
the running Pod sees the update almost immediately. the running Pod sees the update almost immediately.
However, your application only sees the change if it is written to either poll for changes, However, your application only sees the change if it is written to either poll for changes,
or watch for file updates. or watch for file updates.
An application that loads its configuration once at startup will not notice a change. An application that loads its configuration once at startup will not notice a change.
--> -->
当你有一个 ConfigMap 通过 `configMap` 卷或 `projected` 卷映射到运行中的 Pod， 当你有一个 ConfigMap 通过 `configMap` 卷或 `projected` 卷映射到运行中的 Pod，
并且你更新了该 ConfigMap 时，运行中的 Pod 几乎会立即更新。 并且你更新了该 ConfigMap 时，运行中的 Pod 几乎会立即更新。
但是，你的应用只有在编写为轮询变更或监视文件更新时才能看到变更。 但是，你的应用只有在编写为轮询变更或监视文件更新时才能看到变更。
启动时一次性加载其配置的应用将不会注意到变更。 启动时一次性加载其配置的应用将不会注意到变更。
{{< note >}} {{< note >}}
<!-- <!--
The total delay from the moment when the ConfigMap is updated to the moment when The total delay from the moment when the ConfigMap is updated to the moment when
new keys are projected to the Pod can be as long as kubelet sync period. new keys are projected to the Pod can be as long as kubelet sync period.
Also check [Mounted ConfigMaps are updated automatically](/docs/tasks/configure-pod-container/configure-pod-configmap/#mounted-configmaps-are-updated-automatically). Also check [Mounted ConfigMaps are updated automatically](/docs/tasks/configure-pod-container/configure-pod-configmap/#mounted-configmaps-are-updated-automatically).
--> -->
从更新 ConfigMap 的那一刻到将新的键投射到 Pod 的那一刻，整个延迟可能与 kubelet 同步周期相同。 从更新 ConfigMap 的那一刻到将新的键投射到 Pod 的那一刻，整个延迟可能与 kubelet 同步周期相同。
另请参阅[挂载的 ConfigMap 会被自动更新](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/#mounted-configmaps-are-updated-automatically)。 另请参阅[挂载的 ConfigMap 会被自动更新](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/#mounted-configmaps-are-updated-automatically)。
{{< /note >}} {{< /note >}}
@ -331,8 +345,19 @@ Here's an example of how that manifest could look after you edit it:
以下是你编辑后该清单可能的样子： 以下是你编辑后该清单可能的样子：
<!-- <!--
```yaml
apiVersion: v1
data:
fruits: mangoes
kind: ConfigMap
# You can leave the existing metadata as they are. # You can leave the existing metadata as they are.
# The values you'll see won't exactly match these. # The values you'll see won't exactly match these.
metadata:
creationTimestamp: "2024-01-04T16:04:19Z"
name: fruits
namespace: default
resourceVersion: "1749472"
```
--> -->
```yaml ```yaml
apiVersion: v1 apiVersion: v1
@ -632,8 +657,20 @@ Here's an example of how that manifest could look after you edit it:
以下是你编辑后该清单可能的样子： 以下是你编辑后该清单可能的样子：
<!-- <!--
```yaml
apiVersion: v1
data:
color: blue
kind: ConfigMap
# You can leave the existing metadata as they are. # You can leave the existing metadata as they are.
# The values you'll see won't exactly match these. # The values you'll see won't exactly match these.
metadata:
creationTimestamp: "2024-01-05T08:12:05Z"
name: color
namespace: configmap
resourceVersion: "1801272"
uid: 80d33e4a-cbb4-4bc9-ba8c-544c68e425d6
```
--> -->
```yaml ```yaml
apiVersion: v1 apiVersion: v1
@ -663,7 +700,7 @@ You should see the output change as follows:
循环访问服务 URL 几秒钟。 循环访问服务 URL 几秒钟。
```shell ```shell
# 当你满意时可以取消此操作 (Ctrl-C) # 当你满意时可以取消此操作（Ctrl-C）
while true; do curl --connect-timeout 7.5 http://localhost:8080; sleep 10; done while true; do curl --connect-timeout 7.5 http://localhost:8080; sleep 10; done
``` ```
@ -683,24 +720,22 @@ Fri Jan 5 08:15:00 UTC 2024 My preferred color is blue
## Update configuration via a ConfigMap in a Pod possessing a sidecar container {#rollout-configmap-sidecar} ## Update configuration via a ConfigMap in a Pod possessing a sidecar container {#rollout-configmap-sidecar}
The above scenario can be replicated by using a [Sidecar Container](/docs/concepts/workloads/pods/sidecar-containers/) The above scenario can be replicated by using a [Sidecar Container](/docs/concepts/workloads/pods/sidecar-containers/)
as a helper container to write the HTML file. as a helper container to write the HTML file.
As a Sidecar Container is conceptually an Init Container, it is guaranteed to start before the main web server container. As a Sidecar Container is conceptually an Init Container, it is guaranteed to start before the main web server container.
This ensures that the HTML file is always available when the web server is ready to serve it. This ensures that the HTML file is always available when the web server is ready to serve it.
Please see [Enabling sidecar containers](/docs/concepts/workloads/pods/sidecar-containers/#enabling-sidecar-containers) to utilize this feature.
--> -->
## 在包含边车容器的 Pod 中通过 ConfigMap 更新配置 {#rollout-configmap-sidecar} ## 在包含边车容器的 Pod 中通过 ConfigMap 更新配置 {#rollout-configmap-sidecar}
要重现上述场景，可以使用[边车容器](/zh-cn/docs/concepts/workloads/pods/sidecar-containers/)作为辅助容器来写入 HTML 文件。 要重现上述场景，可以使用[边车容器](/zh-cn/docs/concepts/workloads/pods/sidecar-containers/)作为辅助容器来写入
由于边车容器在概念上是一个 Init 容器，因此保证会在主要 Web 服务器容器启动之前启动。 HTML 文件。由于边车容器在概念上是一个 Init 容器，因此保证会在主要 Web 服务器容器启动之前启动。
这确保了当 Web 服务器准备好提供服务时，HTML 文件始终可用。 这确保了当 Web 服务器准备好提供服务时，HTML 文件始终可用。
请参阅[启用边车容器](/zh-cn/docs/concepts/workloads/pods/sidecar-containers/#enabling-sidecar-containers)以使用此特性。
<!-- <!--
If you are continuing from the previous scenario, you can reuse the ConfigMap named `color` for this scenario. If you are continuing from the previous scenario, you can reuse the ConfigMap named `color` for this scenario.
If you are executing this scenario independently, use the `kubectl create configmap` command to create a ConfigMap If you are executing this scenario independently, use the `kubectl create configmap` command to create a ConfigMap
from [literal values](/docs/tasks/configure-pod-container/configure-pod-configmap/#create-configmaps-from-literal-values): from [literal values](/docs/tasks/configure-pod-container/configure-pod-configmap/#create-configmaps-from-literal-values):
--> -->
如果你从前一个场景继续操作，你可以在此场景中重用名为 `color` 的 ConfigMap。 如果你从前一个场景继续操作，你可以在此场景中重用名为 `color` 的 ConfigMap。
如果你是独立执行此场景，请使用 `kubectl create configmap` 如果你是独立执行此场景，请使用 `kubectl create configmap`
命令基于[字面值](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/#create-configmaps-from-literal-values)创建一个 命令基于[字面值](/zh-cn/docs/tasks/configure-pod-container/configure-pod-configmap/#create-configmaps-from-literal-values)创建一个
ConfigMap： ConfigMap：
@ -819,8 +854,20 @@ Here's an example of how that manifest could look after you edit it:
以下是你编辑后该清单可能的样子： 以下是你编辑后该清单可能的样子：
<!-- <!--
```yaml
apiVersion: v1
data:
color: green
kind: ConfigMap
# You can leave the existing metadata as they are. # You can leave the existing metadata as they are.
# The values you'll see won't exactly match these. # The values you'll see won't exactly match these.
metadata:
creationTimestamp: "2024-02-17T12:20:30Z"
name: color
namespace: default
resourceVersion: "1054"
uid: e40bb34c-58df-4280-8bea-6ed16edccfaa
```
--> -->
```yaml ```yaml
apiVersion: v1 apiVersion: v1
@ -979,12 +1026,12 @@ Wed Mar 20 03:52:54 UTC 2024 The name of the company is ACME, Inc.
{{< note >}} {{< note >}}
<!-- <!--
Once a ConfigMap is marked as immutable, it is not possible to revert this change Once a ConfigMap is marked as immutable, it is not possible to revert this change
nor to mutate the contents of the data or the binaryData field. nor to mutate the contents of the data or the binaryData field.
In order to modify the behavior of the Pods that use this configuration, In order to modify the behavior of the Pods that use this configuration,
you will create a new immutable ConfigMap and edit the Deployment you will create a new immutable ConfigMap and edit the Deployment
to define a slightly different pod template, referencing the new ConfigMap. to define a slightly different pod template, referencing the new ConfigMap.
--> -->
一旦 ConfigMap 被标记为不可变，就无法撤销此变更，也无法修改 `data` 或 `binaryData` 字段的内容。 一旦 ConfigMap 被标记为不可变，就无法撤销此变更，也无法修改 `data` 或 `binaryData` 字段的内容。
为了修改使用此配置的 Pod 的行为，你需要创建一个新的不可变 ConfigMap，并编辑 Deployment 为了修改使用此配置的 Pod 的行为，你需要创建一个新的不可变 ConfigMap，并编辑 Deployment
以定义一个稍有不同的 Pod 模板，引用新的 ConfigMap。 以定义一个稍有不同的 Pod 模板，引用新的 ConfigMap。
{{< /note >}} {{< /note >}}
@ -1180,7 +1227,13 @@ Delete the resources created during the tutorial:
删除以上教程中所创建的资源： 删除以上教程中所创建的资源：
<!-- <!--
# In case it was not handled during the task execution ```shell
kubectl delete deployment configmap-volume configmap-env-var configmap-two-containers configmap-sidecar-container immutable-configmap-volume
kubectl delete service configmap-service configmap-sidecar-service
kubectl delete configmap sport fruits color company-name-20240312
kubectl delete configmap company-name-20150801 # In case it was not handled during the task execution
```
--> -->
```shell ```shell
kubectl delete deployment configmap-volume configmap-env-var configmap-two-containers configmap-sidecar-container immutable-configmap-volume kubectl delete deployment configmap-volume configmap-env-var configmap-two-containers configmap-sidecar-container immutable-configmap-volume