Anyone can answer for this question in lighting lab,please? Print the names of . . .

Kubernetes
#1

양상헌:
Anyone can answer for this question in lighting lab,please?

Print the names of all deployments in the admin2406 namespace in the following format:
DEPLOYMENT CONTAINER_IMAGE READY_REPLICAS NAMESPACE
<deployment name> <container image used> <ready replica count> <Namespace>
. The data should be sorted by the increasing order of the deployment name.

Example:
DEPLOYMENT CONTAINER_IMAGE READY_REPLICAS NAMESPACE
deploy0 nginx:alpine 1 admin2406
Write the result to the file /opt/admin2406_data.

Hint: Make use of -o custom-columns and --sort-by to print the data in the required format.
kubectl get pods -A -o=custom-columns=‘DATA:spec.containers[*].image’

so I tried like below but lighting lab got error…

DEPLOYMENT:metadata.namespace
CONTAINER_IMAGE:spec.containers[*].image
READY_REPLICAS:spec.replicas
NAMESPACE:metadata.namespace

DEPLOYMENT:metadata.namespace,CONTAINER_IMAGE:spec.containers[*].image,READY_REPLICAS:spec.replicas,NAMESPACE:metadata.namespace

so my answer is like ;

kubectl get deploypods -n admin2406 -o=custom-columns=‘DEPLOYMENT:metadata.namespace,CONTAINER_IMAGE:spec.containers[*].image,READY_REPLICAS:spec.replicas,NAMESPACE:metadata.namespace’

is this correct, or correct me…thanks in advance.

#2

Alicio Cerqueira:
hello, I created the resources here on my minikube

k create ns admin2406
k create deploy test-deploy-01 --image=nginx --namespace=admin2406 --replicas=1
k create deploy test-deploy-02 --image=nginx --namespace=admin2406 --replicas=2
#3

Alicio Cerqueira:
then…

#4

Alicio Cerqueira:

k get deploy -n admin2406 -o=custom-columns=DEPLOYMENT:metadata.name,CONTAINER_IMAGE:spec.template.spec.containers[*].image,READY_REPLICAS:status.readyReplicas,NAMESPACE:metadata.namespace  --sort-by=.metadata.name
#5

Alicio Cerqueira:
this what I got

#6

Alicio Cerqueira:

Screenshot from 2020-12-29 22-36-21.png

#7

Alicio Cerqueira:
I hope it can help u

#8

양상헌:
thank you very much Alicio,I should revisit the details on mine…(I also forgot sorting…^^)

#9

Alicio Cerqueira:
yw

#10

Lakshminarayanan Krishnan:
There is one more way to get the output in the manner you want, without breaking your fingers with the custom-columns, which is to use custom-columns-file option. Simply write out the columns expected into a template file, like so:

echo "DEPLOYMENT CONTAINER_IMAGE READY_REPLICAS NAMESPACE" &gt; template.txt

Next, view the deployments in yaml format (or json format if you so prefer) using the command:

kubectl get deployments -n admin2406 -o yaml &gt; deps.yaml

View the yaml file and get the paths to the spec that is expected, and edit the template.txt file mentioned above appropriately, so the contents would be:

DEPLOYMENT CONTAINER_IMAGE READY_REPLICAS NAMESPACE
.metadata.name .spec.template.spec.containers[*].image .status.readyReplicas .metadata.namespace

Finally, execute the following command:

kubectl get deployments -n admin2406 -o custom-columns-file=template.txt --sort-by=.metadata.name
#11

Laks NK:

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