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Code snippents shouldn't include the command prompt (#12779)

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This commit is contained in:
Neha Yadav
2019-03-07 15:01:05 +05:30
committed by Kubernetes Prow Robot
parent 99e4d3bac6
commit d3cca48e3f
40 changed files with 1052 additions and 441 deletions
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content/en/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough.md
+32 -12
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@@ -65,7 +65,9 @@ It defines an index.php page which performs some CPU intensive computations:
First, we will start a deployment running the image and expose it as a service:
```shell
$ kubectl run php-apache --image=k8s.gcr.io/hpa-example --requests=cpu=200m --expose --port=80
kubectl run php-apache --image=k8s.gcr.io/hpa-example --requests=cpu=200m --expose --port=80
```
```
service/php-apache created
deployment.apps/php-apache created
```
@@ -82,14 +84,18 @@ Roughly speaking, HPA will increase and decrease the number of replicas
See [here](https://git.k8s.io/community/contributors/design-proposals/autoscaling/horizontal-pod-autoscaler.md#autoscaling-algorithm) for more details on the algorithm.
```shell
$ kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10
kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10
```
```
horizontalpodautoscaler.autoscaling/php-apache autoscaled
```
We may check the current status of autoscaler by running:
```shell
$ kubectl get hpa
kubectl get hpa
```
```
NAME REFERENCE TARGET MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache/scale 0% / 50% 1 10 1 18s
@@ -104,17 +110,19 @@ Now, we will see how the autoscaler reacts to increased load.
We will start a container, and send an infinite loop of queries to the php-apache service (please run it in a different terminal):
```shell
$ kubectl run -i --tty load-generator --image=busybox /bin/sh
kubectl run -i --tty load-generator --image=busybox /bin/sh
Hit enter for command prompt
$ while true; do wget -q -O- http://php-apache.default.svc.cluster.local; done
while true; do wget -q -O- http://php-apache.default.svc.cluster.local; done
```
Within a minute or so, we should see the higher CPU load by executing:
```shell
$ kubectl get hpa
kubectl get hpa
```
```
NAME REFERENCE TARGET CURRENT MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache/scale 305% / 50% 305% 1 10 1 3m
@@ -124,7 +132,9 @@ Here, CPU consumption has increased to 305% of the request.
As a result, the deployment was resized to 7 replicas:
```shell
$ kubectl get deployment php-apache
kubectl get deployment php-apache
```
```
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
php-apache 7 7 7 7 19m
```
@@ -145,11 +155,17 @@ the load generation by typing `<Ctrl> + C`.
Then we will verify the result state (after a minute or so):
```shell
$ kubectl get hpa
kubectl get hpa
```
```
NAME REFERENCE TARGET MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache/scale 0% / 50% 1 10 1 11m
```
$ kubectl get deployment php-apache
```shell
kubectl get deployment php-apache
```
```
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
php-apache 1 1 1 1 27m
```
@@ -172,7 +188,7 @@ by making use of the `autoscaling/v2beta2` API version.
First, get the YAML of your HorizontalPodAutoscaler in the `autoscaling/v2beta2` form:
```shell
$ kubectl get hpa.v2beta2.autoscaling -o yaml > /tmp/hpa-v2.yaml
kubectl get hpa.v2beta2.autoscaling -o yaml > /tmp/hpa-v2.yaml
```
Open the `/tmp/hpa-v2.yaml` file in an editor, and you should see YAML which looks like this:
@@ -401,7 +417,9 @@ The conditions appear in the `status.conditions` field. To see the conditions a
we can use `kubectl describe hpa`:
```shell
$ kubectl describe hpa cm-test
kubectl describe hpa cm-test
```
```shell
Name: cm-test
Namespace: prom
Labels: <none>
@@ -454,7 +472,9 @@ can use the following file to create it declaratively:
We will create the autoscaler by executing the following command:
```shell
$ kubectl create -f https://k8s.io/examples/application/hpa/php-apache.yaml
kubectl create -f https://k8s.io/examples/application/hpa/php-apache.yaml
```
```
horizontalpodautoscaler.autoscaling/php-apache created
```