Useful kubectl and helm Commands

This page is for administrators who have deployed Splunk AppDynamics collectors onto their Kubernetes® clusters.

Change kubectl Context (Connect kubectl to Target Cluster)

If you manage more than one Kubernetes cluster, follow these steps to switch the context of kubectl to any target Kubernetes cluster:

Log into the computer that runs kubectl.

List the clusters (“contexts”) that kubectl knows about:

kubectl config get-contexts

BASH

Sample output:

CURRENT   NAME                         CLUSTER                    ...
*         admin@cluster1.mydomain.io   cluster1.mydomain.io       ...
          admin@cluster2.mydomain.io   cluster2.mydomain.io       ...

CODE

Connect kubectl to your cluster, using its value in the NAME column in the output of the previous command:
```
kubectl config use-context <context-name> 
```
BASH
For example,
```
kubectl config use-context admin@cluster2.mydomain.io
```
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Confirm that kubectl is now connected to the right cluster:
```
kubectl config current-context
```
BASH
Sample output:
```
admin@cluster2.mydomain.io
```
CODE

Get Container Name

To find the container name, run the command kubectl describe pod <pod-name>. This command lists the names of all containers on the pod named <pod-name>.

kubectl describe pod <pod-name>

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Get Configuration Values

Run the helm get values command to retrieve the values from your cluster, where <release-name> is the name you gave to your deployment of the Helm chart you specify:

helm get values <release-name> -n appdynamics

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Get Deployment (Release) Name

The release name is in the NAME column of the output of the helm ls command.

helm ls

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Get Pod Configuration

kubectl describe pod

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or

kubectl get pod -o yaml

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Get Pod Logs

kubectl -n appdynamics logs <pod-name>

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or

kubectl -n appdynamics logs <pod-name> -f

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where -f means "follow", to configure the logs to be streamed.

List Running Pods

kubectl get pods -n appdynamics

BASH

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