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Qiming Teng
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content/zh/docs/tasks/run-application/run-stateless-application-deployment.md
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@@ -5,143 +5,237 @@ content_type: tutorial
<!-- overview -->
<!--
This page shows how to run an application using a Kubernetes Deployment object.
-->
本文介绍通过Kubernetes Deployment对象如何去运行一个应用.
## {{% heading "objectives" %}}
* 创建一个nginx deployment.
* 使用kubectl列举关于deployment信息.
* 更新deployment.
<!--
* Create an nginx deployment.
* Use kubectl to list information about the deployment.
* Update the deployment.
-->
* 创建一个 nginx Deployment.
* 使用 kubectl 列举关于 Deployment 的信息.
* 更新 Deployment。
## {{% heading "prerequisites" %}}
{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
<!-- lessoncontent -->
## 创建和探究一个nginx deployment
<!--
## Creating and exploring an nginx deployment
你可以通过创建一个Kubernetes Deployment对象来运行一个应用, 可以在一个YAML文件中描述Deployment. 例如, 下面这个YAML文件描述了一个运行nginx:1.7.9 Docker镜像的Deployment:
You can run an application by creating a Kubernetes Deployment object, and you
can describe a Deployment in a YAML file. For example, this YAML file describes
a Deployment that runs the nginx:1.14.2 Docker image:
-->
## 创建并了解一个 nginx Deployment
你可以通过创建一个 Kubernetes Deployment 对象来运行一个应用, 且你可以在一个
YAML 文件中描述 Deployment。例如, 下面这个 YAML 文件描述了一个运行 nginx:1.7.9
Docker 镜像的 Deployment：
{{< codenew file="application/deployment.yaml" >}}
<!--
1. Create a Deployment based on the YAML file:
-->
1. 通过 YAML 文件创建一个 Deployment：
1. 通过YAML文件创建一个Deployment:
```shell
kubectl apply -f https://k8s.io/examples/application/deployment.yaml
```
kubectl apply -f https://k8s.io/examples/application/deployment.yaml
<!--
1. Display information about the Deployment:
-->
2. 显示 Deployment 相关信息：
1. 展示Deployment相关信息:
```shell
kubectl describe deployment nginx-deployment
```
kubectl describe deployment nginx-deployment
<!--
The output is similar to this:
-->
输出类似于这样：
user@computer:~/website$ kubectl describe deployment nginx-deployment
Name: nginx-deployment
Namespace: default
CreationTimestamp: Tue, 30 Aug 2016 18:11:37 -0700
Labels: app=nginx
Annotations: deployment.kubernetes.io/revision=1
Selector: app=nginx
Replicas: 2 desired | 2 updated | 2 total | 2 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 1 max unavailable, 1 max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.7.9
Port: 80/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-1771418926 (2/2 replicas created)
No events.
```
Name: nginx-deployment
Namespace: default
CreationTimestamp: Tue, 30 Aug 2016 18:11:37 -0700
Labels: app=nginx
Annotations: deployment.kubernetes.io/revision=1
Selector: app=nginx
Replicas: 2 desired | 2 updated | 2 total | 2 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 1 max unavailable, 1 max surge
Pod Template:
Labels: app=nginx
Containers:
nginx:
Image: nginx:1.7.9
Port: 80/TCP
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-deployment-1771418926 (2/2 replicas created)
No events.
```
1. 列出deployment创建的pods:
<!--
1. List the Pods created by the deployment:
-->
3. 列出 Deployment 创建的 Pods：
kubectl get pods -l app=nginx
```shell
kubectl get pods -l app=nginx
```
NAME READY STATUS RESTARTS AGE
nginx-deployment-1771418926-7o5ns 1/1 Running 0 16h
nginx-deployment-1771418926-r18az 1/1 Running 0 16h
<!--
The output is similar to this:
-->
输出类似于这样：
1. 展示某一个pod信息:
```
NAME READY STATUS RESTARTS AGE
nginx-deployment-1771418926-7o5ns 1/1 Running 0 16h
nginx-deployment-1771418926-r18az 1/1 Running 0 16h
```
kubectl describe pod <pod-name>
<!--
1. Display information about a Pod:
-->
4. 展示某一个 Pod 信息：
该处 `<pod-name>` 指某一pod的名称.
```shell
kubectl describe pod <pod-name>
```
## 更新deployment
<!--
where `<pod-name>` is the name of one of your Pods.
-->
这里的 `<pod-name>` 是某一 Pod 的名称。
你可以通过更新一个新的YAML文件来更新deployment. 下面的YAML文件指定该deployment镜像更新为nginx 1.8.
<!--
## Updating the deployment
You can update the deployment by applying a new YAML file. This YAML file
specifies that the deployment should be updated to use nginx 1.16.1.
-->
## 更新 Deployment
你可以通过更新一个新的 YAML 文件来更新 Deployment。下面的 YAML 文件指定该
Deployment 镜像更新为 nginx 1.16.1。
{{< codenew file="application/deployment-update.yaml" >}}
1. 应用新的YAML:
<!--
1. Apply the new YAML file:
-->
1. 应用新的 YAML：
kubectl apply -f https://k8s.io/examples/application/deployment-update.yaml
```shell
kubectl apply -f https://k8s.io/examples/application/deployment-update.yaml
```
1. 查看该deployment创建的pods以新的名称同时删除旧的pods:
<!--
1. Watch the deployment create pods with new names and delete the old pods:
-->
2. 查看该 Deployment 以新的名称创建 Pods 同时删除旧的 Pods：
kubectl get pods -l app=nginx
```shell
kubectl get pods -l app=nginx
```
<!--
## Scaling the application by increasing the replica count
## 通过增加副本数来弹缩应用
You can increase the number of Pods in your Deployment by applying a new YAML
file. This YAML file sets `replicas` to 4, which specifies that the Deployment
should have four Pods:
-->
## 通过增加副本数来扩缩应用
你可以通过应用新的YAML文件来增加Deployment中pods的数量. 该YAML文件将`replicas`设置为4, 指定该Deployment应有4个pods:
你可以通过应用新的 YAML 文件来增加 Deployment 中 Pods 的数量。
下面的 YAML 文件将 `replicas` 设置为 4，指定该 Deployment 应有 4 个 Pods：
{{< codenew file="application/deployment-scale.yaml" >}}
1. 应用新的YAML文件:
<!--
1. Apply the new YAML file:
-->
1. 应用新的 YAML 文件：
kubectl apply -f https://k8s.io/examples/application/deployment-scale.yaml
```shell
kubectl apply -f https://k8s.io/examples/application/deployment-scale.yaml
```
1. 验证Deployment有4个pods:
<!--
1. Verify that the Deployment has four Pods:
-->
2. 验证 Deployment 有 4 个 Pods：
kubectl get pods -l app=nginx
```shell
kubectl get pods -l app=nginx
```
输出的结果类似于:
<!--
The output is similar to this:
-->
输出的结果类似于:
NAME READY STATUS RESTARTS AGE
nginx-deployment-148880595-4zdqq 1/1 Running 0 25s
nginx-deployment-148880595-6zgi1 1/1 Running 0 25s
nginx-deployment-148880595-fxcez 1/1 Running 0 2m
nginx-deployment-148880595-rwovn 1/1 Running 0 2m
```
NAME READY STATUS RESTARTS AGE
nginx-deployment-148880595-4zdqq 1/1 Running 0 25s
nginx-deployment-148880595-6zgi1 1/1 Running 0 25s
nginx-deployment-148880595-fxcez 1/1 Running 0 2m
nginx-deployment-148880595-rwovn 1/1 Running 0 2m
```
## 删除deployment
<!--
## Deleting a deployment
通过名称删除deployment:
Delete the deployment by name:
-->
## 删除 Deployment
kubectl delete deployment nginx-deployment
通过名称删除 Deployment：
```shell
kubectl delete deployment nginx-deployment
```
<!--
## ReplicationControllers -- the Old Way
The preferred way to create a replicated application is to use a Deployment,
which in turn uses a ReplicaSet. Before the Deployment and ReplicaSet were
added to Kubernetes, replicated applications were configured using a
[ReplicationController](/docs/concepts/workloads/controllers/replicationcontroller/).
-->
## ReplicationControllers -- 旧的方式
创建一个多副本应用首选方法是使用Deployment,反过来使用ReplicaSet. 在Deployment和ReplicaSet加入到Kubernetes之前, 多副本应用通过[ReplicationController](/docs/concepts/workloads/controllers/replicationcontroller/)来配置.
创建一个多副本应用首选方法是使用 Deployment，Deployment 内部使用 ReplicaSet。
在 Deployment 和 ReplicaSet 被引入到 Kubernetes 之前，多副本应用通过
[ReplicationController](/zh/docs/concepts/workloads/controllers/replicationcontroller/)
来配置。
## {{% heading "whatsnext" %}}
* 了解更多 [Deployment objects](/docs/concepts/workloads/controllers/deployment/).
<!--
* Learn more about [Deployment objects](/docs/concepts/workloads/controllers/deployment/).
-->
* 进一步了解 [Deployment 对象](/zh/docs/concepts/workloads/controllers/deployment/)。