I am using kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml to create deployment.
I want to create deployment in my namespace examplenamespace.
How can I do this?
There are three possible solutions.
Specify namespace in the kubectl command:
kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml -n my-namespace
Specify namespace in your yaml files:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-deployment
namespace: my-namespace
Change default namespace in ~/.kube/config:
apiVersion: v1
kind: Config
clusters:
- name: "k8s-dev-cluster-01"
cluster:
server: "https://example.com/k8s/clusters/abc"
namespace: "my-namespace"
By adding -n namespace to command you already have. It also works with other types of resources.
kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml -n namespacename
First you need to create the namespace likes this
kubectl create ns nameOfYourNamespace
Then you create your deployment under your namespace
kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml -n examplenamespace
The ns at
kubectl create ns nameOfYourNamespace
stands for namespace
The -n
kubectl apply -f https://k8s.io/examples/controllers/nginx-deployment.yaml -n examplenamespace
stands for --namespace
So you first create your namespace in order Kubernetes know what namespaces dealing with.
Then when you are about to apply your changes you add the -n flag that stands for --namespace so Kubernetes know under what namespace will deploy/ create the proper resources
Related
apiVersion: projectcalico.org/v3
kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
By using kubectl get networkpolicy, I can see only the policies created by networking.k8s.io/v1 and not those created by projectcalico.org/v3. Any suggestion how to see the latter ones?
kubectl get XXX does not display all the resources in the cluster, in your case you cannot see CRD
You can find your object with kubectl get crds
Then kubectl get <crd name> -A
In your case it would be:
# Get all the CRD from the desired type
kubectl get projectcalico.org/v3 -A
# Now grab the desired name and do whatever you want with it
kubectl describe <CRD>/<resource name> -n <namespace>
i have created a ScaledObject and TriggerAuthentication using Keda, in order to horizontally autoscale my pods based on a RabbitMQ length.
but for some reason, when i try to query my ScaledObjects like this:
kubectl get ScaledObjects -n mynamespace
i am not getting anything.
but when i am applying the yaml file which contains all of the information about the ScaledObject, the output is this:
scaledobject.keda.sh/rabbitmq-scaledobject unchanged
i am also able to edit this scaled object using this command:
kubectl edit scaledobject.keda.sh/rabbitmq-scaledobject -n mynamespace
but i am not sure why it is not listed when doing this command:
kubectl get ScaledObjects -n mynamespace
the autoscaler does work, i am just wondering why it is not listed..
Thanks in Advance,
Yaniv
This might be a case of having more than one Custom Resource defined with the same kind but a different apiVersion.
For example, these two versions of Keda create the ScaledObject with different apiVersion:
1.4:
apiVersion: keda.k8s.io/v1alpha1
kind: ScaledObject
2.0:
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
So when you run kubectl get ScaledObjects -n mynamespace, it might be defaulting to the one you are not using.
I want to know that how to use api to curd my crd resources with api. And I can write a sdk to control resources.
Use kubectl just
kubectl get inferenceservices test-sklearn -n kserve-test
kubectl apply -f xx.yaml -n kserve-test
kubectl delete -f xx.yaml -n kserve-test
apiVersion: "serving.kubeflow.org/v1beta1"
kind: "InferenceService"
metadata:
name: "test-sklearn"
spec:
predictor:
sklearn:
storageUri: "http://xxxx"
get call process in process_log
kubectl get inferenceservices test-sklearn -n kserve-test --v=8 > process_log 2>&1
use kubectl proxy to test
kubectl proxy --address 0.0.0.0 --accept-hosts=^.*
TEST to get resource status
GET http://xxx:8001/apis/serving.kubeflow.org/v1beta1/namespaces/kserve-test/inferenceservices/test-sklearn
I am trying to delete a configmap from a k8s namespace .. i created the configmap using the command below
kubectl -n namespacename create -f configmap.yaml
checking the k8s cheat sheet https://kubernetes.io/docs/reference/kubectl/cheatsheet/ i didn't find anything related .. kindly advise how to do that ?
To delete configmap using configmap name:
# kubectl delete configmap <configmap-name> -n <namespace-name>
$ kubectl delete configmap my-cofigmap -n namespacename
To delete configmap using configmap yaml file:
# kubectl delete -f <file-directory> -n <namespace-name>
$ kubectl delete -f configmap.yaml -n namespacename
You can delete a configMap by it's name. If you are unsure you can check the configMaps within a namespace by using:
kubectl get configmap -n namespacename`
once you have them you can run a delete command:
kubectl delete configmap <configmapname> -n namespacename
Should work this way:
kubectl delete configmap <configmap-name> -n <namespace-name>
Your configmap's name should be defined in your configmap.yaml file.
Easiest way if you created the ConfigMap with a YAML file is to delete it by referencing the YAML file as well:
kubectl delete -n <namespacename> -f configmap.yaml
I am trying to define the namespace name when executing the kubectl create deployment command?
This is what I tried:
kubectl create deployment test --image=banu/image1 namespace=test
and this doesn't work.
And I want to expose this deployment using a ClusterIP service within the cluster itself for that given namespace How can I do that using kubectl command line?
You can specify either -n or --namespace options.
kubectl create deployment test --image=nginx --namespace default --dry-run -o yaml and see result deployment yaml.
Using kubectl run
kubectl run test --namespace test --image nginx --port 9090 --dry-run -o yaml
You need to create a namespace like this
kubectl create ns test
ns stands for namespace, so with kubectl you say you want to create namespace with name test
Then while you creating the deployment you add the namespace you want
kubectl create deployment test --image=banu/image1 -n test
Where flag -n stands for namespace, that way you say to Kubernetes that all resources related to that deployment will be under the test namespace
In order to see all the resources under a specific namespace
kubectl get all -n test
--namespace and -n is the same things
Use -n test instead of namespace=test
Sample with nginx image:
$ kubectl create deployment nginx --image=nginx -n test
deployment.apps/nginx created
$ kubectl get deploy -n test
NAME READY UP-TO-DATE AVAILABLE AGE
nginx 1/1 1 1 8s
In second case you need to create service and define labels from deployment.
You can find correct labels by runnig something like:
kubectl -n test describe deploy test |grep Labels:
and apply service like:
apiVersion: v1
kind: Service
metadata:
name: test-svc
namespace: test
spec:
ports:
- name: test
port: 80 # Change this port
protocol: TCP
type: ClusterIP
selector:
# Here you need to define output from previous step