use kubectl create deployment to create deployment with --replicas and --port.

Signed-off-by: Weiping Cai <weiping.cai@daocloud.io>
This commit is contained in:
Weiping Cai
2020-06-13 17:31:10 +08:00
parent 0061388373
commit cf3becadff
4 changed files with 14 additions and 11 deletions
@@ -494,8 +494,7 @@ kubectl create quota test --hard=count/deployments.extensions=2,count/replicaset
``` ```
```shell ```shell
kubectl create deployment nginx --image=nginx --namespace=myspace kubectl create deployment nginx --image=nginx --namespace=myspace --replicas=2
kubectl scale deployment nginx --replicas=2 --namespace=myspace
``` ```
```shell ```shell
@@ -13,8 +13,7 @@ You can use the Kubernetes command line tool kubectl to interact with the API Se
{{% capture body %}} {{% capture body %}}
## docker run ## docker run
To run an nginx Deployment and expose the Deployment, see [kubectl run](/docs/reference/generated/kubectl/kubectl-commands/#run). To run an nginx Deployment and expose the Deployment, see [kubectl create deployment](/docs/reference/generated/kubectl/kubectl-commands#-em-deployment-em-).
docker: docker:
```shell ```shell
@@ -36,12 +35,19 @@ kubectl:
```shell ```shell
# start the pod running nginx # start the pod running nginx
kubectl run --image=nginx nginx-app --port=80 --env="DOMAIN=cluster" kubectl create deployment --image=nginx nginx-app --port=80
``` ```
``` ```
deployment "nginx-app" created deployment.apps/nginx-app created
``` ```
```
# add env to nginx-app
kubectl set env deployment/nginx-app DOMAIN=cluster
```
```
deployment.apps/nginx-app env updated
{{< note >}} {{< note >}}
`kubectl` commands print the type and name of the resource created or mutated, which can then be used in subsequent commands. You can expose a new Service after a Deployment is created. `kubectl` commands print the type and name of the resource created or mutated, which can then be used in subsequent commands. You can expose a new Service after a Deployment is created.
{{< /note >}} {{< /note >}}
@@ -56,8 +62,7 @@ service "nginx-http" exposed
By using kubectl, you can create a [Deployment](/docs/concepts/workloads/controllers/deployment/) to ensure that N pods are running nginx, where N is the number of replicas stated in the spec and defaults to 1. You can also create a [service](/docs/concepts/services-networking/service/) with a selector that matches the pod labels. For more information, see [Use a Service to Access an Application in a Cluster](/docs/tasks/access-application-cluster/service-access-application-cluster). By using kubectl, you can create a [Deployment](/docs/concepts/workloads/controllers/deployment/) to ensure that N pods are running nginx, where N is the number of replicas stated in the spec and defaults to 1. You can also create a [service](/docs/concepts/services-networking/service/) with a selector that matches the pod labels. For more information, see [Use a Service to Access an Application in a Cluster](/docs/tasks/access-application-cluster/service-access-application-cluster).
By default images run in the background, similar to `docker run -d ...`. To run things in the foreground, use: By default images run in the background, similar to `docker run -d ...`. To run things in the foreground, use [`kubectl run`](/docs/reference/generated/kubectl/kubectl-commands/#run) to create pod:
```shell ```shell
kubectl run [-i] [--tty] --attach <name> --image=<image> kubectl run [-i] [--tty] --attach <name> --image=<image>
``` ```
@@ -268,8 +268,7 @@ kubectl get pods
Production likes to run cattle, so let's create some cattle pods. Production likes to run cattle, so let's create some cattle pods.
```shell ```shell
kubectl create deployment cattle --image=k8s.gcr.io/serve_hostname kubectl create deployment cattle --image=k8s.gcr.io/serve_hostname --replicas=5
kubectl scale deployment cattle --replicas=5
kubectl get deployment kubectl get deployment
``` ```
@@ -189,7 +189,7 @@ This delete is asynchronous, so for a time you will see the namespace in the `Te
To demonstrate this, let's spin up a simple Deployment and Pods in the `development` namespace. To demonstrate this, let's spin up a simple Deployment and Pods in the `development` namespace.
```shell ```shell
kubectl create deployment snowflake --image=k8s.gcr.io/serve_hostname -n=development kubectl create deployment snowflake --image=k8s.gcr.io/serve_hostname -n=development --replicas=2
kubectl scale deployment snowflake --replicas=2 -n=development kubectl scale deployment snowflake --replicas=2 -n=development
``` ```
We have just created a deployment whose replica size is 2 that is running the pod called `snowflake` with a basic container that just serves the hostname. We have just created a deployment whose replica size is 2 that is running the pod called `snowflake` with a basic container that just serves the hostname.